[a32b204] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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[71f4e4f] | 7 | // Resolver.cc -- |
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[a32b204] | 8 | // |
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[d76c588] | 9 | // Author : Aaron B. Moss |
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[a32b204] | 10 | // Created On : Sun May 17 12:17:01 2015 |
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[39d8950] | 11 | // Last Modified By : Andrew Beach |
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[f6e6a55] | 12 | // Last Modified On : Wed Apr 20 10:41:00 2022 |
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| 13 | // Update Count : 248 |
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[a32b204] | 14 | // |
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| 15 | |
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[e3e16bc] | 16 | #include <cassert> // for strict_dynamic_cast, assert |
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[ea6332d] | 17 | #include <memory> // for allocator, allocator_traits<... |
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| 18 | #include <tuple> // for get |
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[6d6e829] | 19 | #include <vector> // for vector |
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[ea6332d] | 20 | |
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| 21 | #include "Alternative.h" // for Alternative, AltList |
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| 22 | #include "AlternativeFinder.h" // for AlternativeFinder, resolveIn... |
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[99d4584] | 23 | #include "Candidate.hpp" |
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| 24 | #include "CandidateFinder.hpp" |
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[d76c588] | 25 | #include "CurrentObject.h" // for CurrentObject |
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| 26 | #include "RenameVars.h" // for RenameVars, global_renamer |
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| 27 | #include "Resolver.h" |
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[16ba4a6f] | 28 | #include "ResolveTypeof.h" |
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[d76c588] | 29 | #include "ResolvMode.h" // for ResolvMode |
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| 30 | #include "typeops.h" // for extractResultType |
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| 31 | #include "Unify.h" // for unify |
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[16ba4a6f] | 32 | #include "CompilationState.h" |
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[4864a73] | 33 | #include "AST/Chain.hpp" |
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[2a8f0c1] | 34 | #include "AST/Decl.hpp" |
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| 35 | #include "AST/Init.hpp" |
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[d76c588] | 36 | #include "AST/Pass.hpp" |
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[99d4584] | 37 | #include "AST/Print.hpp" |
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[d76c588] | 38 | #include "AST/SymbolTable.hpp" |
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[2773ab8] | 39 | #include "AST/Type.hpp" |
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[8f06277] | 40 | #include "Common/Eval.h" // for eval |
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[9feb34b] | 41 | #include "Common/Iterate.hpp" // for group_iterate |
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[a4ca48c] | 42 | #include "Common/PassVisitor.h" // for PassVisitor |
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[ea6332d] | 43 | #include "Common/SemanticError.h" // for SemanticError |
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[57e0289] | 44 | #include "Common/Stats/ResolveTime.h" // for ResolveTime::start(), ResolveTime::stop() |
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[9feb34b] | 45 | #include "Common/ToString.hpp" // for toCString |
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[0a60c04] | 46 | #include "InitTweak/GenInit.h" |
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[ea6332d] | 47 | #include "InitTweak/InitTweak.h" // for isIntrinsicSingleArgCallStmt |
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| 48 | #include "ResolvExpr/TypeEnvironment.h" // for TypeEnvironment |
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| 49 | #include "SymTab/Autogen.h" // for SizeType |
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| 50 | #include "SymTab/Indexer.h" // for Indexer |
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[16ba4a6f] | 51 | #include "SymTab/Mangler.h" // for Mangler |
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[ea6332d] | 52 | #include "SynTree/Declaration.h" // for ObjectDecl, TypeDecl, Declar... |
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| 53 | #include "SynTree/Expression.h" // for Expression, CastExpr, InitExpr |
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| 54 | #include "SynTree/Initializer.h" // for ConstructorInit, SingleInit |
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| 55 | #include "SynTree/Statement.h" // for ForStmt, Statement, BranchStmt |
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| 56 | #include "SynTree/Type.h" // for Type, BasicType, PointerType |
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| 57 | #include "SynTree/TypeSubstitution.h" // for TypeSubstitution |
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| 58 | #include "SynTree/Visitor.h" // for acceptAll, maybeAccept |
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[0a60c04] | 59 | #include "Tuples/Tuples.h" |
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[2bfc6b2] | 60 | #include "Validate/FindSpecialDecls.h" // for SizeType |
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[51b7345] | 61 | |
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[d9a0e76] | 62 | using namespace std; |
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[51b7345] | 63 | |
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[d9a0e76] | 64 | namespace ResolvExpr { |
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[d76c588] | 65 | struct Resolver_old final : public WithIndexer, public WithGuards, public WithVisitorRef<Resolver_old>, public WithShortCircuiting, public WithStmtsToAdd { |
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| 66 | Resolver_old() {} |
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| 67 | Resolver_old( const SymTab::Indexer & other ) { |
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[a4ca48c] | 68 | indexer = other; |
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[1d2b64f] | 69 | } |
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[71f4e4f] | 70 | |
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[5170d95] | 71 | void previsit( FunctionDecl * functionDecl ); |
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| 72 | void postvisit( FunctionDecl * functionDecl ); |
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| 73 | void previsit( ObjectDecl * objectDecll ); |
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[a4ca48c] | 74 | void previsit( EnumDecl * enumDecl ); |
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[bd87b138] | 75 | void previsit( StaticAssertDecl * assertDecl ); |
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[a4ca48c] | 76 | |
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| 77 | void previsit( ArrayType * at ); |
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| 78 | void previsit( PointerType * at ); |
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| 79 | |
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[5170d95] | 80 | void previsit( ExprStmt * exprStmt ); |
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| 81 | void previsit( AsmExpr * asmExpr ); |
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| 82 | void previsit( AsmStmt * asmStmt ); |
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| 83 | void previsit( IfStmt * ifStmt ); |
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[3b0bc16] | 84 | void previsit( WhileDoStmt * whileDoStmt ); |
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[5170d95] | 85 | void previsit( ForStmt * forStmt ); |
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| 86 | void previsit( SwitchStmt * switchStmt ); |
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| 87 | void previsit( CaseStmt * caseStmt ); |
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| 88 | void previsit( BranchStmt * branchStmt ); |
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| 89 | void previsit( ReturnStmt * returnStmt ); |
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| 90 | void previsit( ThrowStmt * throwStmt ); |
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| 91 | void previsit( CatchStmt * catchStmt ); |
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[3b9c674] | 92 | void postvisit( CatchStmt * catchStmt ); |
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[695e00d] | 93 | void previsit( WaitForStmt * stmt ); |
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[a4ca48c] | 94 | |
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[5170d95] | 95 | void previsit( SingleInit * singleInit ); |
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| 96 | void previsit( ListInit * listInit ); |
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| 97 | void previsit( ConstructorInit * ctorInit ); |
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[a32b204] | 98 | private: |
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[c28a038d] | 99 | typedef std::list< Initializer * >::iterator InitIterator; |
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[94b4364] | 100 | |
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[40e636a] | 101 | template< typename PtrType > |
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| 102 | void handlePtrType( PtrType * type ); |
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| 103 | |
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[c28a038d] | 104 | void fallbackInit( ConstructorInit * ctorInit ); |
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[b726084] | 105 | |
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[77971f6] | 106 | Type * functionReturn = nullptr; |
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[e4d829b] | 107 | CurrentObject currentObject = nullptr; |
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[a436947] | 108 | bool inEnumDecl = false; |
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[a32b204] | 109 | }; |
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[d9a0e76] | 110 | |
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[2a6292d] | 111 | struct ResolveWithExprs : public WithIndexer, public WithGuards, public WithVisitorRef<ResolveWithExprs>, public WithShortCircuiting, public WithStmtsToAdd { |
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| 112 | void previsit( FunctionDecl * ); |
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| 113 | void previsit( WithStmt * ); |
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| 114 | |
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| 115 | void resolveWithExprs( std::list< Expression * > & withExprs, std::list< Statement * > & newStmts ); |
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| 116 | }; |
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| 117 | |
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[a32b204] | 118 | void resolve( std::list< Declaration * > translationUnit ) { |
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[d76c588] | 119 | PassVisitor<Resolver_old> resolver; |
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[a32b204] | 120 | acceptAll( translationUnit, resolver ); |
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[d9a0e76] | 121 | } |
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| 122 | |
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[5170d95] | 123 | void resolveDecl( Declaration * decl, const SymTab::Indexer & indexer ) { |
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[d76c588] | 124 | PassVisitor<Resolver_old> resolver( indexer ); |
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[8b11840] | 125 | maybeAccept( decl, resolver ); |
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| 126 | } |
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| 127 | |
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[c71b256] | 128 | namespace { |
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[99d4584] | 129 | struct DeleteFinder_old : public WithShortCircuiting { |
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[c71b256] | 130 | DeletedExpr * delExpr = nullptr; |
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| 131 | void previsit( DeletedExpr * expr ) { |
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| 132 | if ( delExpr ) visit_children = false; |
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| 133 | else delExpr = expr; |
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| 134 | } |
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| 135 | |
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| 136 | void previsit( Expression * ) { |
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| 137 | if ( delExpr ) visit_children = false; |
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| 138 | } |
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| 139 | }; |
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| 140 | } |
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| 141 | |
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| 142 | DeletedExpr * findDeletedExpr( Expression * expr ) { |
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[99d4584] | 143 | PassVisitor<DeleteFinder_old> finder; |
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[c71b256] | 144 | expr->accept( finder ); |
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| 145 | return finder.pass.delExpr; |
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[d9a0e76] | 146 | } |
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[a32b204] | 147 | |
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| 148 | namespace { |
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[99d4584] | 149 | struct StripCasts_old { |
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[cdb990a] | 150 | Expression * postmutate( CastExpr * castExpr ) { |
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| 151 | if ( castExpr->isGenerated && ResolvExpr::typesCompatible( castExpr->arg->result, castExpr->result, SymTab::Indexer() ) ) { |
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| 152 | // generated cast is to the same type as its argument, so it's unnecessary -- remove it |
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| 153 | Expression * expr = castExpr->arg; |
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| 154 | castExpr->arg = nullptr; |
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| 155 | std::swap( expr->env, castExpr->env ); |
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| 156 | return expr; |
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| 157 | } |
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| 158 | return castExpr; |
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| 159 | } |
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| 160 | |
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| 161 | static void strip( Expression *& expr ) { |
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[99d4584] | 162 | PassVisitor<StripCasts_old> stripper; |
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[cdb990a] | 163 | expr = expr->acceptMutator( stripper ); |
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| 164 | } |
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| 165 | }; |
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| 166 | |
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[5170d95] | 167 | void finishExpr( Expression *& expr, const TypeEnvironment & env, TypeSubstitution * oldenv = nullptr ) { |
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[7664fad] | 168 | expr->env = oldenv ? oldenv->clone() : new TypeSubstitution; |
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[cdb990a] | 169 | env.makeSubstitution( *expr->env ); |
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[99d4584] | 170 | StripCasts_old::strip( expr ); // remove unnecessary casts that may be buried in an expression |
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[a32b204] | 171 | } |
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[0a22cda] | 172 | |
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| 173 | void removeExtraneousCast( Expression *& expr, const SymTab::Indexer & indexer ) { |
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| 174 | if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) { |
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[b7d92b96] | 175 | if ( typesCompatible( castExpr->arg->result, castExpr->result, indexer ) ) { |
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[0a22cda] | 176 | // cast is to the same type as its argument, so it's unnecessary -- remove it |
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| 177 | expr = castExpr->arg; |
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| 178 | castExpr->arg = nullptr; |
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| 179 | std::swap( expr->env, castExpr->env ); |
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| 180 | delete castExpr; |
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| 181 | } |
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| 182 | } |
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| 183 | } |
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[db4ecc5] | 184 | } // namespace |
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[a32b204] | 185 | |
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[8f98b78] | 186 | namespace { |
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[59cf83b] | 187 | void findUnfinishedKindExpression(Expression * untyped, Alternative & alt, const SymTab::Indexer & indexer, const std::string & kindStr, std::function<bool(const Alternative &)> pred, ResolvMode mode = ResolvMode{} ) { |
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[c71b256] | 188 | assertf( untyped, "expected a non-null expression." ); |
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[6d6e829] | 189 | |
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| 190 | // xxx - this isn't thread-safe, but should work until we parallelize the resolver |
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| 191 | static unsigned recursion_level = 0; |
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| 192 | |
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| 193 | ++recursion_level; |
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[8587878e] | 194 | TypeEnvironment env; |
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| 195 | AlternativeFinder finder( indexer, env ); |
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[6d6e829] | 196 | finder.find( untyped, recursion_level == 1 ? mode.atTopLevel() : mode ); |
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| 197 | --recursion_level; |
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[c71b256] | 198 | |
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| 199 | #if 0 |
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| 200 | if ( finder.get_alternatives().size() != 1 ) { |
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| 201 | std::cerr << "untyped expr is "; |
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| 202 | untyped->print( std::cerr ); |
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| 203 | std::cerr << std::endl << "alternatives are:"; |
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| 204 | for ( const Alternative & alt : finder.get_alternatives() ) { |
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| 205 | alt.print( std::cerr ); |
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| 206 | } // for |
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| 207 | } // if |
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| 208 | #endif |
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[8587878e] | 209 | |
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[6d6e829] | 210 | // produce filtered list of alternatives |
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[8587878e] | 211 | AltList candidates; |
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| 212 | for ( Alternative & alt : finder.get_alternatives() ) { |
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[c71b256] | 213 | if ( pred( alt ) ) { |
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[8587878e] | 214 | candidates.push_back( std::move( alt ) ); |
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| 215 | } |
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| 216 | } |
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| 217 | |
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[6d6e829] | 218 | // produce invalid error if no candidates |
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| 219 | if ( candidates.empty() ) { |
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[a16764a6] | 220 | SemanticError( untyped, toString( "No reasonable alternatives for ", kindStr, (kindStr != "" ? " " : ""), "expression: ") ); |
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[6d6e829] | 221 | } |
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| 222 | |
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| 223 | // search for cheapest candidate |
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| 224 | AltList winners; |
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| 225 | bool seen_undeleted = false; |
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| 226 | for ( unsigned i = 0; i < candidates.size(); ++i ) { |
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| 227 | int c = winners.empty() ? -1 : candidates[i].cost.compare( winners.front().cost ); |
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| 228 | |
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| 229 | if ( c > 0 ) continue; // skip more expensive than winner |
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| 230 | |
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| 231 | if ( c < 0 ) { |
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| 232 | // reset on new cheapest |
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| 233 | seen_undeleted = ! findDeletedExpr( candidates[i].expr ); |
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| 234 | winners.clear(); |
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| 235 | } else /* if ( c == 0 ) */ { |
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| 236 | if ( findDeletedExpr( candidates[i].expr ) ) { |
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| 237 | // skip deleted expression if already seen one equivalent-cost not |
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| 238 | if ( seen_undeleted ) continue; |
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| 239 | } else if ( ! seen_undeleted ) { |
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| 240 | // replace list of equivalent-cost deleted expressions with one non-deleted |
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| 241 | winners.clear(); |
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| 242 | seen_undeleted = true; |
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| 243 | } |
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| 244 | } |
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| 245 | |
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[2fd9f24] | 246 | winners.emplace_back( std::move( candidates[i] ) ); |
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[6d6e829] | 247 | } |
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| 248 | |
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| 249 | // promote alternative.cvtCost to .cost |
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| 250 | // xxx - I don't know why this is done, but I'm keeping the behaviour from findMinCost |
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| 251 | for ( Alternative& winner : winners ) { |
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| 252 | winner.cost = winner.cvtCost; |
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| 253 | } |
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[cde3891] | 254 | |
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[6d6e829] | 255 | // produce ambiguous errors, if applicable |
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| 256 | if ( winners.size() != 1 ) { |
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[8587878e] | 257 | std::ostringstream stream; |
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[c71b256] | 258 | stream << "Cannot choose between " << winners.size() << " alternatives for " << kindStr << (kindStr != "" ? " " : "") << "expression\n"; |
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[8587878e] | 259 | untyped->print( stream ); |
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[93401f8] | 260 | stream << " Alternatives are:\n"; |
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[8587878e] | 261 | printAlts( winners, stream, 1 ); |
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[a16764a6] | 262 | SemanticError( untyped->location, stream.str() ); |
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[8587878e] | 263 | } |
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| 264 | |
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[6d6e829] | 265 | // single selected choice |
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| 266 | Alternative& choice = winners.front(); |
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| 267 | |
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| 268 | // fail on only expression deleted |
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| 269 | if ( ! seen_undeleted ) { |
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[2a08c25] | 270 | SemanticError( untyped->location, choice.expr, "Unique best alternative includes deleted identifier in " ); |
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[c71b256] | 271 | } |
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[6d6e829] | 272 | |
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| 273 | // xxx - check for ambiguous expressions |
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[cde3891] | 274 | |
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[6d6e829] | 275 | // output selected choice |
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[c71b256] | 276 | alt = std::move( choice ); |
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| 277 | } |
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| 278 | |
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| 279 | /// resolve `untyped` to the expression whose alternative satisfies `pred` with the lowest cost; kindStr is used for providing better error messages |
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[59cf83b] | 280 | void findKindExpression(Expression *& untyped, const SymTab::Indexer & indexer, const std::string & kindStr, std::function<bool(const Alternative &)> pred, ResolvMode mode = ResolvMode{}) { |
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[c71b256] | 281 | if ( ! untyped ) return; |
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| 282 | Alternative choice; |
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[59cf83b] | 283 | findUnfinishedKindExpression( untyped, choice, indexer, kindStr, pred, mode ); |
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[c71b256] | 284 | finishExpr( choice.expr, choice.env, untyped->env ); |
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[8587878e] | 285 | delete untyped; |
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[c71b256] | 286 | untyped = choice.expr; |
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| 287 | choice.expr = nullptr; |
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[8587878e] | 288 | } |
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| 289 | |
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[c71b256] | 290 | bool standardAlternativeFilter( const Alternative & ) { |
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| 291 | // currently don't need to filter, under normal circumstances. |
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| 292 | // in the future, this may be useful for removing deleted expressions |
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| 293 | return true; |
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| 294 | } |
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| 295 | } // namespace |
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| 296 | |
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| 297 | // used in resolveTypeof |
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[5170d95] | 298 | Expression * resolveInVoidContext( Expression * expr, const SymTab::Indexer & indexer ) { |
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[c71b256] | 299 | TypeEnvironment env; |
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| 300 | return resolveInVoidContext( expr, indexer, env ); |
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| 301 | } |
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| 302 | |
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[5170d95] | 303 | Expression * resolveInVoidContext( Expression * expr, const SymTab::Indexer & indexer, TypeEnvironment & env ) { |
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[c71b256] | 304 | // it's a property of the language that a cast expression has either 1 or 0 interpretations; if it has 0 |
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| 305 | // interpretations, an exception has already been thrown. |
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| 306 | assertf( expr, "expected a non-null expression." ); |
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| 307 | |
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[5170d95] | 308 | CastExpr * untyped = new CastExpr( expr ); // cast to void |
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| 309 | untyped->location = expr->location; |
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[c71b256] | 310 | |
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| 311 | // set up and resolve expression cast to void |
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| 312 | Alternative choice; |
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[5170d95] | 313 | findUnfinishedKindExpression( untyped, choice, indexer, "", standardAlternativeFilter, ResolvMode::withAdjustment() ); |
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[c71b256] | 314 | CastExpr * castExpr = strict_dynamic_cast< CastExpr * >( choice.expr ); |
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[5170d95] | 315 | assert( castExpr ); |
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[c71b256] | 316 | env = std::move( choice.env ); |
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| 317 | |
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| 318 | // clean up resolved expression |
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| 319 | Expression * ret = castExpr->arg; |
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| 320 | castExpr->arg = nullptr; |
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| 321 | |
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| 322 | // unlink the arg so that it isn't deleted twice at the end of the program |
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[5170d95] | 323 | untyped->arg = nullptr; |
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[c71b256] | 324 | return ret; |
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| 325 | } |
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| 326 | |
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[5170d95] | 327 | void findVoidExpression( Expression *& untyped, const SymTab::Indexer & indexer ) { |
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[c71b256] | 328 | resetTyVarRenaming(); |
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| 329 | TypeEnvironment env; |
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| 330 | Expression * newExpr = resolveInVoidContext( untyped, indexer, env ); |
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| 331 | finishExpr( newExpr, env, untyped->env ); |
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| 332 | delete untyped; |
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| 333 | untyped = newExpr; |
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| 334 | } |
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| 335 | |
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[5170d95] | 336 | void findSingleExpression( Expression *& untyped, const SymTab::Indexer & indexer ) { |
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[c71b256] | 337 | findKindExpression( untyped, indexer, "", standardAlternativeFilter ); |
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| 338 | } |
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| 339 | |
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| 340 | void findSingleExpression( Expression *& untyped, Type * type, const SymTab::Indexer & indexer ) { |
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| 341 | assert( untyped && type ); |
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[2a08c25] | 342 | // transfer location to generated cast for error purposes |
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| 343 | CodeLocation location = untyped->location; |
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[c71b256] | 344 | untyped = new CastExpr( untyped, type ); |
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[2a08c25] | 345 | untyped->location = location; |
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[c71b256] | 346 | findSingleExpression( untyped, indexer ); |
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| 347 | removeExtraneousCast( untyped, indexer ); |
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| 348 | } |
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| 349 | |
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| 350 | namespace { |
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| 351 | bool isIntegralType( const Alternative & alt ) { |
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| 352 | Type * type = alt.expr->result; |
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[a32b204] | 353 | if ( dynamic_cast< EnumInstType * >( type ) ) { |
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| 354 | return true; |
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[5170d95] | 355 | } else if ( BasicType * bt = dynamic_cast< BasicType * >( type ) ) { |
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[a32b204] | 356 | return bt->isInteger(); |
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[89e6ffc] | 357 | } else if ( dynamic_cast< ZeroType* >( type ) != nullptr || dynamic_cast< OneType* >( type ) != nullptr ) { |
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| 358 | return true; |
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[a32b204] | 359 | } else { |
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| 360 | return false; |
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| 361 | } // if |
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| 362 | } |
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[71f4e4f] | 363 | |
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[5170d95] | 364 | void findIntegralExpression( Expression *& untyped, const SymTab::Indexer & indexer ) { |
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[8587878e] | 365 | findKindExpression( untyped, indexer, "condition", isIntegralType ); |
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[a32b204] | 366 | } |
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| 367 | } |
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[71f4e4f] | 368 | |
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[2a6292d] | 369 | |
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| 370 | bool isStructOrUnion( const Alternative & alt ) { |
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| 371 | Type * t = alt.expr->result->stripReferences(); |
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| 372 | return dynamic_cast< StructInstType * >( t ) || dynamic_cast< UnionInstType * >( t ); |
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| 373 | } |
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| 374 | |
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| 375 | void resolveWithExprs( std::list< Declaration * > & translationUnit ) { |
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| 376 | PassVisitor<ResolveWithExprs> resolver; |
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| 377 | acceptAll( translationUnit, resolver ); |
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| 378 | } |
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| 379 | |
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| 380 | void ResolveWithExprs::resolveWithExprs( std::list< Expression * > & withExprs, std::list< Statement * > & newStmts ) { |
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| 381 | for ( Expression *& expr : withExprs ) { |
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| 382 | // only struct- and union-typed expressions are viable candidates |
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| 383 | findKindExpression( expr, indexer, "with statement", isStructOrUnion ); |
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| 384 | |
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| 385 | // if with expression might be impure, create a temporary so that it is evaluated once |
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| 386 | if ( Tuples::maybeImpure( expr ) ) { |
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| 387 | static UniqueName tmpNamer( "_with_tmp_" ); |
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| 388 | ObjectDecl * tmp = ObjectDecl::newObject( tmpNamer.newName(), expr->result->clone(), new SingleInit( expr ) ); |
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| 389 | expr = new VariableExpr( tmp ); |
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| 390 | newStmts.push_back( new DeclStmt( tmp ) ); |
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| 391 | if ( InitTweak::isConstructable( tmp->type ) ) { |
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| 392 | // generate ctor/dtor and resolve them |
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| 393 | tmp->init = InitTweak::genCtorInit( tmp ); |
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| 394 | tmp->accept( *visitor ); |
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| 395 | } |
---|
| 396 | } |
---|
| 397 | } |
---|
| 398 | } |
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| 399 | |
---|
| 400 | void ResolveWithExprs::previsit( WithStmt * withStmt ) { |
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| 401 | resolveWithExprs( withStmt->exprs, stmtsToAddBefore ); |
---|
| 402 | } |
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| 403 | |
---|
| 404 | void ResolveWithExprs::previsit( FunctionDecl * functionDecl ) { |
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| 405 | { |
---|
| 406 | // resolve with-exprs with parameters in scope and add any newly generated declarations to the |
---|
| 407 | // front of the function body. |
---|
| 408 | auto guard = makeFuncGuard( [this]() { indexer.enterScope(); }, [this](){ indexer.leaveScope(); } ); |
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| 409 | indexer.addFunctionType( functionDecl->type ); |
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| 410 | std::list< Statement * > newStmts; |
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| 411 | resolveWithExprs( functionDecl->withExprs, newStmts ); |
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| 412 | if ( functionDecl->statements ) { |
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| 413 | functionDecl->statements->kids.splice( functionDecl->statements->kids.begin(), newStmts ); |
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| 414 | } else { |
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| 415 | assertf( functionDecl->withExprs.empty() && newStmts.empty(), "Function %s without a body has with-clause and/or generated with declarations.", functionDecl->name.c_str() ); |
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| 416 | } |
---|
| 417 | } |
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| 418 | } |
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| 419 | |
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[d76c588] | 420 | void Resolver_old::previsit( ObjectDecl * objectDecl ) { |
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[4864a73] | 421 | // To handle initialization of routine pointers, e.g., int (*fp)(int) = foo(), means that |
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| 422 | // class-variable initContext is changed multiple time because the LHS is analysed twice. |
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| 423 | // The second analysis changes initContext because of a function type can contain object |
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| 424 | // declarations in the return and parameter types. So each value of initContext is |
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[6d6e829] | 425 | // retained, so the type on the first analysis is preserved and used for selecting the RHS. |
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[a4ca48c] | 426 | GuardValue( currentObject ); |
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[e4d829b] | 427 | currentObject = CurrentObject( objectDecl->get_type() ); |
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| 428 | if ( inEnumDecl && dynamic_cast< EnumInstType * >( objectDecl->get_type() ) ) { |
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[a436947] | 429 | // enumerator initializers should not use the enum type to initialize, since |
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| 430 | // the enum type is still incomplete at this point. Use signed int instead. |
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[9e7236f4] | 431 | // TODO: BasicType::SignedInt may not longer be true |
---|
[e4d829b] | 432 | currentObject = CurrentObject( new BasicType( Type::Qualifiers(), BasicType::SignedInt ) ); |
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[a436947] | 433 | } |
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[bfbf97f] | 434 | } |
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| 435 | |
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[40e636a] | 436 | template< typename PtrType > |
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[d76c588] | 437 | void Resolver_old::handlePtrType( PtrType * type ) { |
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[40e636a] | 438 | if ( type->get_dimension() ) { |
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[2bfc6b2] | 439 | findSingleExpression( type->dimension, Validate::SizeType->clone(), indexer ); |
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[d1d17f5] | 440 | } |
---|
[40e636a] | 441 | } |
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| 442 | |
---|
[d76c588] | 443 | void Resolver_old::previsit( ArrayType * at ) { |
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[40e636a] | 444 | handlePtrType( at ); |
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[a32b204] | 445 | } |
---|
[94b4364] | 446 | |
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[d76c588] | 447 | void Resolver_old::previsit( PointerType * pt ) { |
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[40e636a] | 448 | handlePtrType( pt ); |
---|
| 449 | } |
---|
| 450 | |
---|
[d76c588] | 451 | void Resolver_old::previsit( FunctionDecl * functionDecl ) { |
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[d9a0e76] | 452 | #if 0 |
---|
[a4ca48c] | 453 | std::cerr << "resolver visiting functiondecl "; |
---|
| 454 | functionDecl->print( std::cerr ); |
---|
| 455 | std::cerr << std::endl; |
---|
[d9a0e76] | 456 | #endif |
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[a4ca48c] | 457 | GuardValue( functionReturn ); |
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[60914351] | 458 | functionReturn = ResolvExpr::extractResultType( functionDecl->type ); |
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[a4ca48c] | 459 | } |
---|
[88d1066] | 460 | |
---|
[d76c588] | 461 | void Resolver_old::postvisit( FunctionDecl * functionDecl ) { |
---|
[4864a73] | 462 | // default value expressions have an environment which shouldn't be there and trips up |
---|
[6d6e829] | 463 | // later passes. |
---|
[cde3891] | 464 | // xxx - it might be necessary to somehow keep the information from this environment, but I |
---|
[6d6e829] | 465 | // can't currently see how it's useful. |
---|
[c28a038d] | 466 | for ( Declaration * d : functionDecl->type->parameters ) { |
---|
[88d1066] | 467 | if ( ObjectDecl * obj = dynamic_cast< ObjectDecl * >( d ) ) { |
---|
[c28a038d] | 468 | if ( SingleInit * init = dynamic_cast< SingleInit * >( obj->init ) ) { |
---|
| 469 | delete init->value->env; |
---|
| 470 | init->value->env = nullptr; |
---|
[88d1066] | 471 | } |
---|
| 472 | } |
---|
| 473 | } |
---|
[a32b204] | 474 | } |
---|
[51b7345] | 475 | |
---|
[d76c588] | 476 | void Resolver_old::previsit( EnumDecl * ) { |
---|
[a436947] | 477 | // in case we decide to allow nested enums |
---|
[a4ca48c] | 478 | GuardValue( inEnumDecl ); |
---|
[a436947] | 479 | inEnumDecl = true; |
---|
| 480 | } |
---|
| 481 | |
---|
[d76c588] | 482 | void Resolver_old::previsit( StaticAssertDecl * assertDecl ) { |
---|
[bd87b138] | 483 | findIntegralExpression( assertDecl->condition, indexer ); |
---|
| 484 | } |
---|
| 485 | |
---|
[d76c588] | 486 | void Resolver_old::previsit( ExprStmt * exprStmt ) { |
---|
[a4ca48c] | 487 | visit_children = false; |
---|
[08da53d] | 488 | assertf( exprStmt->expr, "ExprStmt has null Expression in resolver" ); |
---|
| 489 | findVoidExpression( exprStmt->expr, indexer ); |
---|
[a32b204] | 490 | } |
---|
[51b7345] | 491 | |
---|
[d76c588] | 492 | void Resolver_old::previsit( AsmExpr * asmExpr ) { |
---|
[a4ca48c] | 493 | visit_children = false; |
---|
[08da53d] | 494 | findVoidExpression( asmExpr->operand, indexer ); |
---|
[7f5566b] | 495 | } |
---|
| 496 | |
---|
[d76c588] | 497 | void Resolver_old::previsit( AsmStmt * asmStmt ) { |
---|
[a4ca48c] | 498 | visit_children = false; |
---|
| 499 | acceptAll( asmStmt->get_input(), *visitor ); |
---|
| 500 | acceptAll( asmStmt->get_output(), *visitor ); |
---|
[7f5566b] | 501 | } |
---|
| 502 | |
---|
[d76c588] | 503 | void Resolver_old::previsit( IfStmt * ifStmt ) { |
---|
[8587878e] | 504 | findIntegralExpression( ifStmt->condition, indexer ); |
---|
[a32b204] | 505 | } |
---|
[51b7345] | 506 | |
---|
[3b0bc16] | 507 | void Resolver_old::previsit( WhileDoStmt * whileDoStmt ) { |
---|
| 508 | findIntegralExpression( whileDoStmt->condition, indexer ); |
---|
[a32b204] | 509 | } |
---|
[51b7345] | 510 | |
---|
[d76c588] | 511 | void Resolver_old::previsit( ForStmt * forStmt ) { |
---|
[08da53d] | 512 | if ( forStmt->condition ) { |
---|
[8587878e] | 513 | findIntegralExpression( forStmt->condition, indexer ); |
---|
[a32b204] | 514 | } // if |
---|
[71f4e4f] | 515 | |
---|
[08da53d] | 516 | if ( forStmt->increment ) { |
---|
| 517 | findVoidExpression( forStmt->increment, indexer ); |
---|
[a32b204] | 518 | } // if |
---|
| 519 | } |
---|
[51b7345] | 520 | |
---|
[d76c588] | 521 | void Resolver_old::previsit( SwitchStmt * switchStmt ) { |
---|
[a4ca48c] | 522 | GuardValue( currentObject ); |
---|
[08da53d] | 523 | findIntegralExpression( switchStmt->condition, indexer ); |
---|
[71f4e4f] | 524 | |
---|
[08da53d] | 525 | currentObject = CurrentObject( switchStmt->condition->result ); |
---|
[a32b204] | 526 | } |
---|
[51b7345] | 527 | |
---|
[d76c588] | 528 | void Resolver_old::previsit( CaseStmt * caseStmt ) { |
---|
[cdb990a] | 529 | if ( caseStmt->condition ) { |
---|
[e4d829b] | 530 | std::list< InitAlternative > initAlts = currentObject.getOptions(); |
---|
| 531 | assertf( initAlts.size() == 1, "SwitchStmt did not correctly resolve an integral expression." ); |
---|
[08da53d] | 532 | // must remove cast from case statement because RangeExpr cannot be cast. |
---|
| 533 | Expression * newExpr = new CastExpr( caseStmt->condition, initAlts.front().type->clone() ); |
---|
| 534 | findSingleExpression( newExpr, indexer ); |
---|
[cdb990a] | 535 | // case condition cannot have a cast in C, so it must be removed, regardless of whether it performs a conversion. |
---|
| 536 | // Ideally we would perform the conversion internally here. |
---|
| 537 | if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( newExpr ) ) { |
---|
| 538 | newExpr = castExpr->arg; |
---|
| 539 | castExpr->arg = nullptr; |
---|
| 540 | std::swap( newExpr->env, castExpr->env ); |
---|
| 541 | delete castExpr; |
---|
| 542 | } |
---|
| 543 | caseStmt->condition = newExpr; |
---|
[32b8144] | 544 | } |
---|
[a32b204] | 545 | } |
---|
[51b7345] | 546 | |
---|
[d76c588] | 547 | void Resolver_old::previsit( BranchStmt * branchStmt ) { |
---|
[a4ca48c] | 548 | visit_children = false; |
---|
[de62360d] | 549 | // must resolve the argument for a computed goto |
---|
| 550 | if ( branchStmt->get_type() == BranchStmt::Goto ) { // check for computed goto statement |
---|
[08da53d] | 551 | if ( branchStmt->computedTarget ) { |
---|
| 552 | // computed goto argument is void * |
---|
| 553 | findSingleExpression( branchStmt->computedTarget, new PointerType( Type::Qualifiers(), new VoidType( Type::Qualifiers() ) ), indexer ); |
---|
[de62360d] | 554 | } // if |
---|
| 555 | } // if |
---|
| 556 | } |
---|
| 557 | |
---|
[d76c588] | 558 | void Resolver_old::previsit( ReturnStmt * returnStmt ) { |
---|
[a4ca48c] | 559 | visit_children = false; |
---|
[08da53d] | 560 | if ( returnStmt->expr ) { |
---|
| 561 | findSingleExpression( returnStmt->expr, functionReturn->clone(), indexer ); |
---|
[a32b204] | 562 | } // if |
---|
| 563 | } |
---|
[51b7345] | 564 | |
---|
[d76c588] | 565 | void Resolver_old::previsit( ThrowStmt * throwStmt ) { |
---|
[a4ca48c] | 566 | visit_children = false; |
---|
[cbce272] | 567 | // TODO: Replace *exception type with &exception type. |
---|
[307a732] | 568 | if ( throwStmt->get_expr() ) { |
---|
[3090127] | 569 | const StructDecl * exception_decl = indexer.lookupStruct( "__cfaehm_base_exception_t" ); |
---|
[cbce272] | 570 | assert( exception_decl ); |
---|
[8fd52e90] | 571 | Type * exceptType = new PointerType( noQualifiers, new StructInstType( noQualifiers, const_cast<StructDecl *>(exception_decl) ) ); |
---|
[08da53d] | 572 | findSingleExpression( throwStmt->expr, exceptType, indexer ); |
---|
[307a732] | 573 | } |
---|
| 574 | } |
---|
| 575 | |
---|
[d76c588] | 576 | void Resolver_old::previsit( CatchStmt * catchStmt ) { |
---|
[3b0bc16] | 577 | // Until we are very sure this invarent (ifs that move between passes have then) |
---|
[3b9c674] | 578 | // holds, check it. This allows a check for when to decode the mangling. |
---|
| 579 | if ( IfStmt * ifStmt = dynamic_cast<IfStmt *>( catchStmt->body ) ) { |
---|
[3b0bc16] | 580 | assert( ifStmt->then ); |
---|
[3b9c674] | 581 | } |
---|
| 582 | // Encode the catchStmt so the condition can see the declaration. |
---|
[08da53d] | 583 | if ( catchStmt->cond ) { |
---|
[3b9c674] | 584 | IfStmt * ifStmt = new IfStmt( catchStmt->cond, nullptr, catchStmt->body ); |
---|
| 585 | catchStmt->cond = nullptr; |
---|
| 586 | catchStmt->body = ifStmt; |
---|
| 587 | } |
---|
| 588 | } |
---|
| 589 | |
---|
| 590 | void Resolver_old::postvisit( CatchStmt * catchStmt ) { |
---|
| 591 | // Decode the catchStmt so everything is stored properly. |
---|
| 592 | IfStmt * ifStmt = dynamic_cast<IfStmt *>( catchStmt->body ); |
---|
[3b0bc16] | 593 | if ( nullptr != ifStmt && nullptr == ifStmt->then ) { |
---|
[3b9c674] | 594 | assert( ifStmt->condition ); |
---|
[3b0bc16] | 595 | assert( ifStmt->else_ ); |
---|
[3b9c674] | 596 | catchStmt->cond = ifStmt->condition; |
---|
[3b0bc16] | 597 | catchStmt->body = ifStmt->else_; |
---|
[3b9c674] | 598 | ifStmt->condition = nullptr; |
---|
[3b0bc16] | 599 | ifStmt->else_ = nullptr; |
---|
[3b9c674] | 600 | delete ifStmt; |
---|
[cbce272] | 601 | } |
---|
| 602 | } |
---|
| 603 | |
---|
[1dcd9554] | 604 | template< typename iterator_t > |
---|
| 605 | inline bool advance_to_mutex( iterator_t & it, const iterator_t & end ) { |
---|
| 606 | while( it != end && !(*it)->get_type()->get_mutex() ) { |
---|
| 607 | it++; |
---|
| 608 | } |
---|
| 609 | |
---|
| 610 | return it != end; |
---|
| 611 | } |
---|
| 612 | |
---|
[d76c588] | 613 | void Resolver_old::previsit( WaitForStmt * stmt ) { |
---|
[8f98b78] | 614 | visit_children = false; |
---|
[1dcd9554] | 615 | |
---|
| 616 | // Resolve all clauses first |
---|
| 617 | for( auto& clause : stmt->clauses ) { |
---|
| 618 | |
---|
| 619 | TypeEnvironment env; |
---|
[8f98b78] | 620 | AlternativeFinder funcFinder( indexer, env ); |
---|
[1dcd9554] | 621 | |
---|
| 622 | // Find all alternatives for a function in canonical form |
---|
| 623 | funcFinder.findWithAdjustment( clause.target.function ); |
---|
| 624 | |
---|
| 625 | if ( funcFinder.get_alternatives().empty() ) { |
---|
| 626 | stringstream ss; |
---|
| 627 | ss << "Use of undeclared indentifier '"; |
---|
| 628 | ss << strict_dynamic_cast<NameExpr*>( clause.target.function )->name; |
---|
| 629 | ss << "' in call to waitfor"; |
---|
[a16764a6] | 630 | SemanticError( stmt->location, ss.str() ); |
---|
[1dcd9554] | 631 | } |
---|
| 632 | |
---|
[b9f383f] | 633 | if(clause.target.arguments.empty()) { |
---|
| 634 | SemanticError( stmt->location, "Waitfor clause must have at least one mutex parameter"); |
---|
| 635 | } |
---|
| 636 | |
---|
[1dcd9554] | 637 | // Find all alternatives for all arguments in canonical form |
---|
[bd4f2e9] | 638 | std::vector< AlternativeFinder > argAlternatives; |
---|
[1dcd9554] | 639 | funcFinder.findSubExprs( clause.target.arguments.begin(), clause.target.arguments.end(), back_inserter( argAlternatives ) ); |
---|
| 640 | |
---|
| 641 | // List all combinations of arguments |
---|
[bd4f2e9] | 642 | std::vector< AltList > possibilities; |
---|
[1dcd9554] | 643 | combos( argAlternatives.begin(), argAlternatives.end(), back_inserter( possibilities ) ); |
---|
| 644 | |
---|
| 645 | AltList func_candidates; |
---|
| 646 | std::vector< AltList > args_candidates; |
---|
| 647 | |
---|
| 648 | // For every possible function : |
---|
| 649 | // try matching the arguments to the parameters |
---|
| 650 | // not the other way around because we have more arguments than parameters |
---|
[a16764a6] | 651 | SemanticErrorException errors; |
---|
[1dcd9554] | 652 | for ( Alternative & func : funcFinder.get_alternatives() ) { |
---|
| 653 | try { |
---|
| 654 | PointerType * pointer = dynamic_cast< PointerType* >( func.expr->get_result()->stripReferences() ); |
---|
| 655 | if( !pointer ) { |
---|
[a16764a6] | 656 | SemanticError( func.expr->get_result(), "candidate not viable: not a pointer type\n" ); |
---|
[1dcd9554] | 657 | } |
---|
| 658 | |
---|
| 659 | FunctionType * function = dynamic_cast< FunctionType* >( pointer->get_base() ); |
---|
| 660 | if( !function ) { |
---|
[a16764a6] | 661 | SemanticError( pointer->get_base(), "candidate not viable: not a function type\n" ); |
---|
[1dcd9554] | 662 | } |
---|
| 663 | |
---|
| 664 | |
---|
| 665 | { |
---|
| 666 | auto param = function->parameters.begin(); |
---|
| 667 | auto param_end = function->parameters.end(); |
---|
| 668 | |
---|
| 669 | if( !advance_to_mutex( param, param_end ) ) { |
---|
[a16764a6] | 670 | SemanticError(function, "candidate function not viable: no mutex parameters\n"); |
---|
[1dcd9554] | 671 | } |
---|
| 672 | } |
---|
| 673 | |
---|
| 674 | Alternative newFunc( func ); |
---|
| 675 | // Strip reference from function |
---|
[a181494] | 676 | referenceToRvalueConversion( newFunc.expr, newFunc.cost ); |
---|
[1dcd9554] | 677 | |
---|
| 678 | // For all the set of arguments we have try to match it with the parameter of the current function alternative |
---|
| 679 | for ( auto & argsList : possibilities ) { |
---|
| 680 | |
---|
| 681 | try { |
---|
| 682 | // Declare data structures need for resolution |
---|
| 683 | OpenVarSet openVars; |
---|
| 684 | AssertionSet resultNeed, resultHave; |
---|
[6f326b1] | 685 | TypeEnvironment resultEnv( func.env ); |
---|
| 686 | makeUnifiableVars( function, openVars, resultNeed ); |
---|
| 687 | // add all type variables as open variables now so that those not used in the parameter |
---|
| 688 | // list are still considered open. |
---|
| 689 | resultEnv.add( function->forall ); |
---|
[1dcd9554] | 690 | |
---|
| 691 | // Load type variables from arguemnts into one shared space |
---|
| 692 | simpleCombineEnvironments( argsList.begin(), argsList.end(), resultEnv ); |
---|
| 693 | |
---|
| 694 | // Make sure we don't widen any existing bindings |
---|
[d286cf68] | 695 | resultEnv.forbidWidening(); |
---|
[c5283ba] | 696 | |
---|
[1dcd9554] | 697 | // Find any unbound type variables |
---|
| 698 | resultEnv.extractOpenVars( openVars ); |
---|
| 699 | |
---|
| 700 | auto param = function->parameters.begin(); |
---|
| 701 | auto param_end = function->parameters.end(); |
---|
| 702 | |
---|
[c5283ba] | 703 | int n_mutex_param = 0; |
---|
[b9f383f] | 704 | |
---|
[1dcd9554] | 705 | // For every arguments of its set, check if it matches one of the parameter |
---|
| 706 | // The order is important |
---|
| 707 | for( auto & arg : argsList ) { |
---|
| 708 | |
---|
| 709 | // Ignore non-mutex arguments |
---|
| 710 | if( !advance_to_mutex( param, param_end ) ) { |
---|
| 711 | // We ran out of parameters but still have arguments |
---|
| 712 | // this function doesn't match |
---|
[c5283ba] | 713 | SemanticError( function, toString("candidate function not viable: too many mutex arguments, expected ", n_mutex_param, "\n" )); |
---|
[1dcd9554] | 714 | } |
---|
| 715 | |
---|
[c5283ba] | 716 | n_mutex_param++; |
---|
[b9f383f] | 717 | |
---|
[1dcd9554] | 718 | // Check if the argument matches the parameter type in the current scope |
---|
[b9f383f] | 719 | if( ! unify( arg.expr->get_result(), (*param)->get_type(), resultEnv, resultNeed, resultHave, openVars, this->indexer ) ) { |
---|
[1dcd9554] | 720 | // Type doesn't match |
---|
| 721 | stringstream ss; |
---|
| 722 | ss << "candidate function not viable: no known convertion from '"; |
---|
| 723 | (*param)->get_type()->print( ss ); |
---|
[b9f383f] | 724 | ss << "' to '"; |
---|
| 725 | arg.expr->get_result()->print( ss ); |
---|
[5248789] | 726 | ss << "' with env '"; |
---|
| 727 | resultEnv.print(ss); |
---|
[1dcd9554] | 728 | ss << "'\n"; |
---|
[a16764a6] | 729 | SemanticError( function, ss.str() ); |
---|
[1dcd9554] | 730 | } |
---|
| 731 | |
---|
| 732 | param++; |
---|
| 733 | } |
---|
| 734 | |
---|
| 735 | // All arguments match ! |
---|
| 736 | |
---|
| 737 | // Check if parameters are missing |
---|
| 738 | if( advance_to_mutex( param, param_end ) ) { |
---|
[c5283ba] | 739 | do { |
---|
| 740 | n_mutex_param++; |
---|
| 741 | param++; |
---|
| 742 | } while( advance_to_mutex( param, param_end ) ); |
---|
| 743 | |
---|
[1dcd9554] | 744 | // We ran out of arguments but still have parameters left |
---|
| 745 | // this function doesn't match |
---|
[c5283ba] | 746 | SemanticError( function, toString("candidate function not viable: too few mutex arguments, expected ", n_mutex_param, "\n" )); |
---|
[1dcd9554] | 747 | } |
---|
| 748 | |
---|
| 749 | // All parameters match ! |
---|
| 750 | |
---|
| 751 | // Finish the expressions to tie in the proper environments |
---|
| 752 | finishExpr( newFunc.expr, resultEnv ); |
---|
| 753 | for( Alternative & alt : argsList ) { |
---|
| 754 | finishExpr( alt.expr, resultEnv ); |
---|
| 755 | } |
---|
| 756 | |
---|
| 757 | // This is a match store it and save it for later |
---|
| 758 | func_candidates.push_back( newFunc ); |
---|
| 759 | args_candidates.push_back( argsList ); |
---|
| 760 | |
---|
| 761 | } |
---|
[5170d95] | 762 | catch( SemanticErrorException & e ) { |
---|
[1dcd9554] | 763 | errors.append( e ); |
---|
| 764 | } |
---|
| 765 | } |
---|
| 766 | } |
---|
[5170d95] | 767 | catch( SemanticErrorException & e ) { |
---|
[1dcd9554] | 768 | errors.append( e ); |
---|
| 769 | } |
---|
| 770 | } |
---|
| 771 | |
---|
| 772 | // Make sure we got the right number of arguments |
---|
[a16764a6] | 773 | if( func_candidates.empty() ) { SemanticErrorException top( stmt->location, "No alternatives for function in call to waitfor" ); top.append( errors ); throw top; } |
---|
| 774 | if( args_candidates.empty() ) { SemanticErrorException top( stmt->location, "No alternatives for arguments in call to waitfor" ); top.append( errors ); throw top; } |
---|
| 775 | if( func_candidates.size() > 1 ) { SemanticErrorException top( stmt->location, "Ambiguous function in call to waitfor" ); top.append( errors ); throw top; } |
---|
| 776 | if( args_candidates.size() > 1 ) { SemanticErrorException top( stmt->location, "Ambiguous arguments in call to waitfor" ); top.append( errors ); throw top; } |
---|
[c71b256] | 777 | // TODO: need to use findDeletedExpr to ensure no deleted identifiers are used. |
---|
[1dcd9554] | 778 | |
---|
| 779 | // Swap the results from the alternative with the unresolved values. |
---|
| 780 | // Alternatives will handle deletion on destruction |
---|
| 781 | std::swap( clause.target.function, func_candidates.front().expr ); |
---|
| 782 | for( auto arg_pair : group_iterate( clause.target.arguments, args_candidates.front() ) ) { |
---|
| 783 | std::swap ( std::get<0>( arg_pair), std::get<1>( arg_pair).expr ); |
---|
| 784 | } |
---|
| 785 | |
---|
| 786 | // Resolve the conditions as if it were an IfStmt |
---|
| 787 | // Resolve the statments normally |
---|
[08da53d] | 788 | findSingleExpression( clause.condition, this->indexer ); |
---|
[8f98b78] | 789 | clause.statement->accept( *visitor ); |
---|
[1dcd9554] | 790 | } |
---|
| 791 | |
---|
| 792 | |
---|
| 793 | if( stmt->timeout.statement ) { |
---|
| 794 | // Resolve the timeout as an size_t for now |
---|
| 795 | // Resolve the conditions as if it were an IfStmt |
---|
| 796 | // Resolve the statments normally |
---|
[08da53d] | 797 | findSingleExpression( stmt->timeout.time, new BasicType( noQualifiers, BasicType::LongLongUnsignedInt ), this->indexer ); |
---|
| 798 | findSingleExpression( stmt->timeout.condition, this->indexer ); |
---|
[8f98b78] | 799 | stmt->timeout.statement->accept( *visitor ); |
---|
[1dcd9554] | 800 | } |
---|
| 801 | |
---|
| 802 | if( stmt->orelse.statement ) { |
---|
| 803 | // Resolve the conditions as if it were an IfStmt |
---|
| 804 | // Resolve the statments normally |
---|
[08da53d] | 805 | findSingleExpression( stmt->orelse.condition, this->indexer ); |
---|
[8f98b78] | 806 | stmt->orelse.statement->accept( *visitor ); |
---|
[1dcd9554] | 807 | } |
---|
| 808 | } |
---|
| 809 | |
---|
[60aaa51d] | 810 | bool isCharType( Type * t ) { |
---|
[b5c5684] | 811 | if ( BasicType * bt = dynamic_cast< BasicType * >( t ) ) { |
---|
[71f4e4f] | 812 | return bt->get_kind() == BasicType::Char || bt->get_kind() == BasicType::SignedChar || |
---|
[b5c5684] | 813 | bt->get_kind() == BasicType::UnsignedChar; |
---|
| 814 | } |
---|
| 815 | return false; |
---|
| 816 | } |
---|
| 817 | |
---|
[d76c588] | 818 | void Resolver_old::previsit( SingleInit * singleInit ) { |
---|
[a4ca48c] | 819 | visit_children = false; |
---|
[62423350] | 820 | // resolve initialization using the possibilities as determined by the currentObject cursor |
---|
[0a22cda] | 821 | Expression * newExpr = new UntypedInitExpr( singleInit->value, currentObject.getOptions() ); |
---|
[08da53d] | 822 | findSingleExpression( newExpr, indexer ); |
---|
[e3e16bc] | 823 | InitExpr * initExpr = strict_dynamic_cast< InitExpr * >( newExpr ); |
---|
[62423350] | 824 | |
---|
| 825 | // move cursor to the object that is actually initialized |
---|
[e4d829b] | 826 | currentObject.setNext( initExpr->get_designation() ); |
---|
[62423350] | 827 | |
---|
| 828 | // discard InitExpr wrapper and retain relevant pieces |
---|
[08da53d] | 829 | newExpr = initExpr->expr; |
---|
| 830 | initExpr->expr = nullptr; |
---|
| 831 | std::swap( initExpr->env, newExpr->env ); |
---|
[cde3891] | 832 | // InitExpr may have inferParams in the case where the expression specializes a function |
---|
| 833 | // pointer, and newExpr may already have inferParams of its own, so a simple swap is not |
---|
[6d6e829] | 834 | // sufficient. |
---|
[cdb990a] | 835 | newExpr->spliceInferParams( initExpr ); |
---|
[e4d829b] | 836 | delete initExpr; |
---|
| 837 | |
---|
[cde3891] | 838 | // get the actual object's type (may not exactly match what comes back from the resolver |
---|
[6d6e829] | 839 | // due to conversions) |
---|
[62423350] | 840 | Type * initContext = currentObject.getCurrentType(); |
---|
| 841 | |
---|
[0a22cda] | 842 | removeExtraneousCast( newExpr, indexer ); |
---|
| 843 | |
---|
[62423350] | 844 | // check if actual object's type is char[] |
---|
| 845 | if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) { |
---|
| 846 | if ( isCharType( at->get_base() ) ) { |
---|
| 847 | // check if the resolved type is char * |
---|
| 848 | if ( PointerType * pt = dynamic_cast< PointerType *>( newExpr->get_result() ) ) { |
---|
| 849 | if ( isCharType( pt->get_base() ) ) { |
---|
[5170d95] | 850 | if ( CastExpr * ce = dynamic_cast< CastExpr * >( newExpr ) ) { |
---|
[cde3891] | 851 | // strip cast if we're initializing a char[] with a char *, |
---|
[6d6e829] | 852 | // e.g. char x[] = "hello"; |
---|
[0a22cda] | 853 | newExpr = ce->get_arg(); |
---|
| 854 | ce->set_arg( nullptr ); |
---|
| 855 | std::swap( ce->env, newExpr->env ); |
---|
| 856 | delete ce; |
---|
| 857 | } |
---|
[62423350] | 858 | } |
---|
| 859 | } |
---|
| 860 | } |
---|
| 861 | } |
---|
[94b4364] | 862 | |
---|
[62423350] | 863 | // set initializer expr to resolved express |
---|
[0a22cda] | 864 | singleInit->value = newExpr; |
---|
[62423350] | 865 | |
---|
| 866 | // move cursor to next object in preparation for next initializer |
---|
| 867 | currentObject.increment(); |
---|
| 868 | } |
---|
[94b4364] | 869 | |
---|
[d76c588] | 870 | void Resolver_old::previsit( ListInit * listInit ) { |
---|
[a4ca48c] | 871 | visit_children = false; |
---|
[62423350] | 872 | // move cursor into brace-enclosed initializer-list |
---|
[e4d829b] | 873 | currentObject.enterListInit(); |
---|
[cde3891] | 874 | // xxx - fix this so that the list isn't copied, iterator should be used to change current |
---|
[6d6e829] | 875 | // element |
---|
[e4d829b] | 876 | std::list<Designation *> newDesignations; |
---|
| 877 | for ( auto p : group_iterate(listInit->get_designations(), listInit->get_initializers()) ) { |
---|
[cde3891] | 878 | // iterate designations and initializers in pairs, moving the cursor to the current |
---|
[6d6e829] | 879 | // designated object and resolving the initializer against that object. |
---|
[e4d829b] | 880 | Designation * des = std::get<0>(p); |
---|
| 881 | Initializer * init = std::get<1>(p); |
---|
| 882 | newDesignations.push_back( currentObject.findNext( des ) ); |
---|
[a4ca48c] | 883 | init->accept( *visitor ); |
---|
[b5c5684] | 884 | } |
---|
[62423350] | 885 | // set the set of 'resolved' designations and leave the brace-enclosed initializer-list |
---|
[e4d829b] | 886 | listInit->get_designations() = newDesignations; // xxx - memory management |
---|
| 887 | currentObject.exitListInit(); |
---|
| 888 | |
---|
[62423350] | 889 | // xxx - this part has not be folded into CurrentObject yet |
---|
[e4d829b] | 890 | // } else if ( TypeInstType * tt = dynamic_cast< TypeInstType * >( initContext ) ) { |
---|
| 891 | // Type * base = tt->get_baseType()->get_base(); |
---|
| 892 | // if ( base ) { |
---|
| 893 | // // know the implementation type, so try using that as the initContext |
---|
| 894 | // ObjectDecl tmpObj( "", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, base->clone(), nullptr ); |
---|
| 895 | // currentObject = &tmpObj; |
---|
| 896 | // visit( listInit ); |
---|
| 897 | // } else { |
---|
| 898 | // // missing implementation type -- might be an unknown type variable, so try proceeding with the current init context |
---|
| 899 | // Parent::visit( listInit ); |
---|
| 900 | // } |
---|
| 901 | // } else { |
---|
[a32b204] | 902 | } |
---|
[71f4e4f] | 903 | |
---|
[f1e012b] | 904 | // ConstructorInit - fall back on C-style initializer |
---|
[d76c588] | 905 | void Resolver_old::fallbackInit( ConstructorInit * ctorInit ) { |
---|
[f1e012b] | 906 | // could not find valid constructor, or found an intrinsic constructor |
---|
| 907 | // fall back on C-style initializer |
---|
| 908 | delete ctorInit->get_ctor(); |
---|
[6d6e829] | 909 | ctorInit->set_ctor( nullptr ); |
---|
[71a145de] | 910 | delete ctorInit->get_dtor(); |
---|
[6d6e829] | 911 | ctorInit->set_dtor( nullptr ); |
---|
[a4ca48c] | 912 | maybeAccept( ctorInit->get_init(), *visitor ); |
---|
[f1e012b] | 913 | } |
---|
| 914 | |
---|
[1d2b64f] | 915 | // needs to be callable from outside the resolver, so this is a standalone function |
---|
| 916 | void resolveCtorInit( ConstructorInit * ctorInit, const SymTab::Indexer & indexer ) { |
---|
| 917 | assert( ctorInit ); |
---|
[d76c588] | 918 | PassVisitor<Resolver_old> resolver( indexer ); |
---|
[1d2b64f] | 919 | ctorInit->accept( resolver ); |
---|
| 920 | } |
---|
| 921 | |
---|
| 922 | void resolveStmtExpr( StmtExpr * stmtExpr, const SymTab::Indexer & indexer ) { |
---|
| 923 | assert( stmtExpr ); |
---|
[d76c588] | 924 | PassVisitor<Resolver_old> resolver( indexer ); |
---|
[1d2b64f] | 925 | stmtExpr->accept( resolver ); |
---|
[5e2c348] | 926 | stmtExpr->computeResult(); |
---|
[dd05e12] | 927 | // xxx - aggregate the environments from all statements? Possibly in AlternativeFinder instead? |
---|
[1d2b64f] | 928 | } |
---|
| 929 | |
---|
[d76c588] | 930 | void Resolver_old::previsit( ConstructorInit * ctorInit ) { |
---|
[a4ca48c] | 931 | visit_children = false; |
---|
[1ba88a0] | 932 | // xxx - fallback init has been removed => remove fallbackInit function and remove complexity from FixInit and remove C-init from ConstructorInit |
---|
[dd05e12] | 933 | maybeAccept( ctorInit->ctor, *visitor ); |
---|
| 934 | maybeAccept( ctorInit->dtor, *visitor ); |
---|
[071a31a] | 935 | |
---|
[5b2f5bb] | 936 | // found a constructor - can get rid of C-style initializer |
---|
[dd05e12] | 937 | delete ctorInit->init; |
---|
| 938 | ctorInit->init = nullptr; |
---|
[ec79847] | 939 | |
---|
| 940 | // intrinsic single parameter constructors and destructors do nothing. Since this was |
---|
| 941 | // implicitly generated, there's no way for it to have side effects, so get rid of it |
---|
| 942 | // to clean up generated code. |
---|
[dd05e12] | 943 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->ctor ) ) { |
---|
| 944 | delete ctorInit->ctor; |
---|
| 945 | ctorInit->ctor = nullptr; |
---|
[ec79847] | 946 | } |
---|
[f9cebb5] | 947 | |
---|
[dd05e12] | 948 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->dtor ) ) { |
---|
| 949 | delete ctorInit->dtor; |
---|
| 950 | ctorInit->dtor = nullptr; |
---|
[ec79847] | 951 | } |
---|
[a465caf] | 952 | |
---|
| 953 | // xxx - todo -- what about arrays? |
---|
[6d6e829] | 954 | // if ( dtor == nullptr && InitTweak::isIntrinsicCallStmt( ctorInit->get_ctor() ) ) { |
---|
[a465caf] | 955 | // // can reduce the constructor down to a SingleInit using the |
---|
| 956 | // // second argument from the ctor call, since |
---|
| 957 | // delete ctorInit->get_ctor(); |
---|
[6d6e829] | 958 | // ctorInit->set_ctor( nullptr ); |
---|
[a465caf] | 959 | |
---|
| 960 | // Expression * arg = |
---|
| 961 | // ctorInit->set_init( new SingleInit( arg ) ); |
---|
| 962 | // } |
---|
[71f4e4f] | 963 | } |
---|
[d76c588] | 964 | |
---|
| 965 | /////////////////////////////////////////////////////////////////////////// |
---|
| 966 | // |
---|
| 967 | // *** NEW RESOLVER *** |
---|
| 968 | // |
---|
| 969 | /////////////////////////////////////////////////////////////////////////// |
---|
| 970 | |
---|
[99d4584] | 971 | namespace { |
---|
| 972 | /// Finds deleted expressions in an expression tree |
---|
[2dda05d] | 973 | struct DeleteFinder_new final : public ast::WithShortCircuiting, public ast::WithVisitorRef<DeleteFinder_new> { |
---|
[e6b42e7] | 974 | const ast::DeletedExpr * result = nullptr; |
---|
[99d4584] | 975 | |
---|
| 976 | void previsit( const ast::DeletedExpr * expr ) { |
---|
[e6b42e7] | 977 | if ( result ) { visit_children = false; } |
---|
| 978 | else { result = expr; } |
---|
[99d4584] | 979 | } |
---|
| 980 | |
---|
[361bf01] | 981 | void previsit( const ast::Expr * expr ) { |
---|
[e6b42e7] | 982 | if ( result ) { visit_children = false; } |
---|
[361bf01] | 983 | if (expr->inferred.hasParams()) { |
---|
| 984 | for (auto & imp : expr->inferred.inferParams() ) { |
---|
[2dda05d] | 985 | imp.second.expr->accept(*visitor); |
---|
[361bf01] | 986 | } |
---|
| 987 | } |
---|
[99d4584] | 988 | } |
---|
| 989 | }; |
---|
[d57e349] | 990 | } // anonymous namespace |
---|
| 991 | /// Check if this expression is or includes a deleted expression |
---|
| 992 | const ast::DeletedExpr * findDeletedExpr( const ast::Expr * expr ) { |
---|
[e6b42e7] | 993 | return ast::Pass<DeleteFinder_new>::read( expr ); |
---|
[d57e349] | 994 | } |
---|
[99d4584] | 995 | |
---|
[d57e349] | 996 | namespace { |
---|
[b7d92b96] | 997 | /// always-accept candidate filter |
---|
| 998 | bool anyCandidate( const Candidate & ) { return true; } |
---|
| 999 | |
---|
[99d4584] | 1000 | /// Calls the CandidateFinder and finds the single best candidate |
---|
| 1001 | CandidateRef findUnfinishedKindExpression( |
---|
[39d8950] | 1002 | const ast::Expr * untyped, const ResolveContext & context, const std::string & kind, |
---|
[b7d92b96] | 1003 | std::function<bool(const Candidate &)> pred = anyCandidate, ResolvMode mode = {} |
---|
[99d4584] | 1004 | ) { |
---|
| 1005 | if ( ! untyped ) return nullptr; |
---|
| 1006 | |
---|
| 1007 | // xxx - this isn't thread-safe, but should work until we parallelize the resolver |
---|
| 1008 | static unsigned recursion_level = 0; |
---|
| 1009 | |
---|
| 1010 | ++recursion_level; |
---|
| 1011 | ast::TypeEnvironment env; |
---|
[39d8950] | 1012 | CandidateFinder finder( context, env ); |
---|
[99d4584] | 1013 | finder.find( untyped, recursion_level == 1 ? mode.atTopLevel() : mode ); |
---|
| 1014 | --recursion_level; |
---|
| 1015 | |
---|
| 1016 | // produce a filtered list of candidates |
---|
| 1017 | CandidateList candidates; |
---|
| 1018 | for ( auto & cand : finder.candidates ) { |
---|
| 1019 | if ( pred( *cand ) ) { candidates.emplace_back( cand ); } |
---|
| 1020 | } |
---|
| 1021 | |
---|
| 1022 | // produce invalid error if no candidates |
---|
| 1023 | if ( candidates.empty() ) { |
---|
[ef5b828] | 1024 | SemanticError( untyped, |
---|
| 1025 | toString( "No reasonable alternatives for ", kind, (kind != "" ? " " : ""), |
---|
[99d4584] | 1026 | "expression: ") ); |
---|
| 1027 | } |
---|
| 1028 | |
---|
| 1029 | // search for cheapest candidate |
---|
| 1030 | CandidateList winners; |
---|
| 1031 | bool seen_undeleted = false; |
---|
| 1032 | for ( CandidateRef & cand : candidates ) { |
---|
| 1033 | int c = winners.empty() ? -1 : cand->cost.compare( winners.front()->cost ); |
---|
| 1034 | |
---|
| 1035 | if ( c > 0 ) continue; // skip more expensive than winner |
---|
| 1036 | |
---|
| 1037 | if ( c < 0 ) { |
---|
| 1038 | // reset on new cheapest |
---|
| 1039 | seen_undeleted = ! findDeletedExpr( cand->expr ); |
---|
| 1040 | winners.clear(); |
---|
| 1041 | } else /* if ( c == 0 ) */ { |
---|
| 1042 | if ( findDeletedExpr( cand->expr ) ) { |
---|
| 1043 | // skip deleted expression if already seen one equivalent-cost not |
---|
| 1044 | if ( seen_undeleted ) continue; |
---|
| 1045 | } else if ( ! seen_undeleted ) { |
---|
| 1046 | // replace list of equivalent-cost deleted expressions with one non-deleted |
---|
| 1047 | winners.clear(); |
---|
| 1048 | seen_undeleted = true; |
---|
| 1049 | } |
---|
| 1050 | } |
---|
| 1051 | |
---|
| 1052 | winners.emplace_back( std::move( cand ) ); |
---|
| 1053 | } |
---|
| 1054 | |
---|
| 1055 | // promote candidate.cvtCost to .cost |
---|
[d57e349] | 1056 | promoteCvtCost( winners ); |
---|
[99d4584] | 1057 | |
---|
| 1058 | // produce ambiguous errors, if applicable |
---|
| 1059 | if ( winners.size() != 1 ) { |
---|
| 1060 | std::ostringstream stream; |
---|
[ef5b828] | 1061 | stream << "Cannot choose between " << winners.size() << " alternatives for " |
---|
[99d4584] | 1062 | << kind << (kind != "" ? " " : "") << "expression\n"; |
---|
| 1063 | ast::print( stream, untyped ); |
---|
| 1064 | stream << " Alternatives are:\n"; |
---|
| 1065 | print( stream, winners, 1 ); |
---|
| 1066 | SemanticError( untyped->location, stream.str() ); |
---|
| 1067 | } |
---|
| 1068 | |
---|
| 1069 | // single selected choice |
---|
| 1070 | CandidateRef & choice = winners.front(); |
---|
| 1071 | |
---|
| 1072 | // fail on only expression deleted |
---|
| 1073 | if ( ! seen_undeleted ) { |
---|
| 1074 | SemanticError( untyped->location, choice->expr.get(), "Unique best alternative " |
---|
| 1075 | "includes deleted identifier in " ); |
---|
| 1076 | } |
---|
| 1077 | |
---|
| 1078 | return std::move( choice ); |
---|
| 1079 | } |
---|
| 1080 | |
---|
| 1081 | /// Strips extraneous casts out of an expression |
---|
| 1082 | struct StripCasts_new final { |
---|
[c408483] | 1083 | const ast::Expr * postvisit( const ast::CastExpr * castExpr ) { |
---|
[ef5b828] | 1084 | if ( |
---|
[2890212] | 1085 | castExpr->isGenerated == ast::GeneratedCast |
---|
[ef5b828] | 1086 | && typesCompatible( castExpr->arg->result, castExpr->result ) |
---|
[99d4584] | 1087 | ) { |
---|
| 1088 | // generated cast is the same type as its argument, remove it after keeping env |
---|
[ef5b828] | 1089 | return ast::mutate_field( |
---|
[b7d92b96] | 1090 | castExpr->arg.get(), &ast::Expr::env, castExpr->env ); |
---|
[99d4584] | 1091 | } |
---|
| 1092 | return castExpr; |
---|
| 1093 | } |
---|
| 1094 | |
---|
| 1095 | static void strip( ast::ptr< ast::Expr > & expr ) { |
---|
| 1096 | ast::Pass< StripCasts_new > stripper; |
---|
| 1097 | expr = expr->accept( stripper ); |
---|
| 1098 | } |
---|
| 1099 | }; |
---|
| 1100 | |
---|
[60aaa51d] | 1101 | /// Swaps argument into expression pointer, saving original environment |
---|
| 1102 | void swap_and_save_env( ast::ptr< ast::Expr > & expr, const ast::Expr * newExpr ) { |
---|
| 1103 | ast::ptr< ast::TypeSubstitution > env = expr->env; |
---|
| 1104 | expr.set_and_mutate( newExpr )->env = env; |
---|
| 1105 | } |
---|
| 1106 | |
---|
[b7d92b96] | 1107 | /// Removes cast to type of argument (unlike StripCasts, also handles non-generated casts) |
---|
| 1108 | void removeExtraneousCast( ast::ptr<ast::Expr> & expr, const ast::SymbolTable & symtab ) { |
---|
| 1109 | if ( const ast::CastExpr * castExpr = expr.as< ast::CastExpr >() ) { |
---|
[251ce80] | 1110 | if ( typesCompatible( castExpr->arg->result, castExpr->result ) ) { |
---|
[b7d92b96] | 1111 | // cast is to the same type as its argument, remove it |
---|
[60aaa51d] | 1112 | swap_and_save_env( expr, castExpr->arg ); |
---|
[b7d92b96] | 1113 | } |
---|
| 1114 | } |
---|
| 1115 | } |
---|
| 1116 | |
---|
[6668a3e] | 1117 | |
---|
[490fb92e] | 1118 | } // anonymous namespace |
---|
| 1119 | /// Establish post-resolver invariants for expressions |
---|
[ef5b828] | 1120 | void finishExpr( |
---|
| 1121 | ast::ptr< ast::Expr > & expr, const ast::TypeEnvironment & env, |
---|
[99d4584] | 1122 | const ast::TypeSubstitution * oldenv = nullptr |
---|
| 1123 | ) { |
---|
| 1124 | // set up new type substitution for expression |
---|
[ef5b828] | 1125 | ast::ptr< ast::TypeSubstitution > newenv = |
---|
[99d4584] | 1126 | oldenv ? oldenv : new ast::TypeSubstitution{}; |
---|
| 1127 | env.writeToSubstitution( *newenv.get_and_mutate() ); |
---|
| 1128 | expr.get_and_mutate()->env = std::move( newenv ); |
---|
| 1129 | // remove unncecessary casts |
---|
| 1130 | StripCasts_new::strip( expr ); |
---|
| 1131 | } |
---|
[ef5b828] | 1132 | |
---|
[4b7cce6] | 1133 | ast::ptr< ast::Expr > resolveInVoidContext( |
---|
[39d8950] | 1134 | const ast::Expr * expr, const ResolveContext & context, |
---|
| 1135 | ast::TypeEnvironment & env |
---|
[4b7cce6] | 1136 | ) { |
---|
| 1137 | assertf( expr, "expected a non-null expression" ); |
---|
[ef5b828] | 1138 | |
---|
[4b7cce6] | 1139 | // set up and resolve expression cast to void |
---|
[417117e] | 1140 | ast::ptr< ast::CastExpr > untyped = new ast::CastExpr{ expr }; |
---|
[ef5b828] | 1141 | CandidateRef choice = findUnfinishedKindExpression( |
---|
[39d8950] | 1142 | untyped, context, "", anyCandidate, ResolvMode::withAdjustment() ); |
---|
[ef5b828] | 1143 | |
---|
[4b7cce6] | 1144 | // a cast expression has either 0 or 1 interpretations (by language rules); |
---|
| 1145 | // if 0, an exception has already been thrown, and this code will not run |
---|
| 1146 | const ast::CastExpr * castExpr = choice->expr.strict_as< ast::CastExpr >(); |
---|
| 1147 | env = std::move( choice->env ); |
---|
| 1148 | |
---|
| 1149 | return castExpr->arg; |
---|
| 1150 | } |
---|
[b7d92b96] | 1151 | |
---|
[490fb92e] | 1152 | /// Resolve `untyped` to the expression whose candidate is the best match for a `void` |
---|
[b7d92b96] | 1153 | /// context. |
---|
[ef5b828] | 1154 | ast::ptr< ast::Expr > findVoidExpression( |
---|
[39d8950] | 1155 | const ast::Expr * untyped, const ResolveContext & context |
---|
[b7d92b96] | 1156 | ) { |
---|
| 1157 | ast::TypeEnvironment env; |
---|
[39d8950] | 1158 | ast::ptr< ast::Expr > newExpr = resolveInVoidContext( untyped, context, env ); |
---|
[b7d92b96] | 1159 | finishExpr( newExpr, env, untyped->env ); |
---|
| 1160 | return newExpr; |
---|
| 1161 | } |
---|
| 1162 | |
---|
[490fb92e] | 1163 | namespace { |
---|
[6668a3e] | 1164 | |
---|
[490fb92e] | 1165 | |
---|
[ef5b828] | 1166 | /// resolve `untyped` to the expression whose candidate satisfies `pred` with the |
---|
[99d4584] | 1167 | /// lowest cost, returning the resolved version |
---|
| 1168 | ast::ptr< ast::Expr > findKindExpression( |
---|
[39d8950] | 1169 | const ast::Expr * untyped, const ResolveContext & context, |
---|
[ef5b828] | 1170 | std::function<bool(const Candidate &)> pred = anyCandidate, |
---|
[2b59f55] | 1171 | const std::string & kind = "", ResolvMode mode = {} |
---|
[99d4584] | 1172 | ) { |
---|
| 1173 | if ( ! untyped ) return {}; |
---|
[ef5b828] | 1174 | CandidateRef choice = |
---|
[39d8950] | 1175 | findUnfinishedKindExpression( untyped, context, kind, pred, mode ); |
---|
[490fb92e] | 1176 | ResolvExpr::finishExpr( choice->expr, choice->env, untyped->env ); |
---|
[99d4584] | 1177 | return std::move( choice->expr ); |
---|
| 1178 | } |
---|
| 1179 | |
---|
[2773ab8] | 1180 | /// Resolve `untyped` to the single expression whose candidate is the best match |
---|
[ef5b828] | 1181 | ast::ptr< ast::Expr > findSingleExpression( |
---|
[39d8950] | 1182 | const ast::Expr * untyped, const ResolveContext & context |
---|
[2773ab8] | 1183 | ) { |
---|
[57e0289] | 1184 | Stats::ResolveTime::start( untyped ); |
---|
[39d8950] | 1185 | auto res = findKindExpression( untyped, context ); |
---|
[57e0289] | 1186 | Stats::ResolveTime::stop(); |
---|
| 1187 | return res; |
---|
[2773ab8] | 1188 | } |
---|
[18e683b] | 1189 | } // anonymous namespace |
---|
[2773ab8] | 1190 | |
---|
[16ba4a6f] | 1191 | ast::ptr< ast::Expr > findSingleExpression( |
---|
[39d8950] | 1192 | const ast::Expr * untyped, const ast::Type * type, |
---|
| 1193 | const ResolveContext & context |
---|
[16ba4a6f] | 1194 | ) { |
---|
| 1195 | assert( untyped && type ); |
---|
| 1196 | ast::ptr< ast::Expr > castExpr = new ast::CastExpr{ untyped, type }; |
---|
[39d8950] | 1197 | ast::ptr< ast::Expr > newExpr = findSingleExpression( castExpr, context ); |
---|
| 1198 | removeExtraneousCast( newExpr, context.symtab ); |
---|
[16ba4a6f] | 1199 | return newExpr; |
---|
| 1200 | } |
---|
[b7d92b96] | 1201 | |
---|
[18e683b] | 1202 | namespace { |
---|
[16ba4a6f] | 1203 | bool structOrUnion( const Candidate & i ) { |
---|
| 1204 | const ast::Type * t = i.expr->result->stripReferences(); |
---|
| 1205 | return dynamic_cast< const ast::StructInstType * >( t ) || dynamic_cast< const ast::UnionInstType * >( t ); |
---|
| 1206 | } |
---|
[99d4584] | 1207 | /// Predicate for "Candidate has integral type" |
---|
| 1208 | bool hasIntegralType( const Candidate & i ) { |
---|
| 1209 | const ast::Type * type = i.expr->result; |
---|
[ef5b828] | 1210 | |
---|
[99d4584] | 1211 | if ( auto bt = dynamic_cast< const ast::BasicType * >( type ) ) { |
---|
| 1212 | return bt->isInteger(); |
---|
[ef5b828] | 1213 | } else if ( |
---|
| 1214 | dynamic_cast< const ast::EnumInstType * >( type ) |
---|
[99d4584] | 1215 | || dynamic_cast< const ast::ZeroType * >( type ) |
---|
| 1216 | || dynamic_cast< const ast::OneType * >( type ) |
---|
| 1217 | ) { |
---|
| 1218 | return true; |
---|
| 1219 | } else return false; |
---|
| 1220 | } |
---|
| 1221 | |
---|
| 1222 | /// Resolve `untyped` as an integral expression, returning the resolved version |
---|
[ef5b828] | 1223 | ast::ptr< ast::Expr > findIntegralExpression( |
---|
[39d8950] | 1224 | const ast::Expr * untyped, const ResolveContext & context |
---|
[99d4584] | 1225 | ) { |
---|
[39d8950] | 1226 | return findKindExpression( untyped, context, hasIntegralType, "condition" ); |
---|
[99d4584] | 1227 | } |
---|
[60aaa51d] | 1228 | |
---|
| 1229 | /// check if a type is a character type |
---|
| 1230 | bool isCharType( const ast::Type * t ) { |
---|
| 1231 | if ( auto bt = dynamic_cast< const ast::BasicType * >( t ) ) { |
---|
[ef5b828] | 1232 | return bt->kind == ast::BasicType::Char |
---|
| 1233 | || bt->kind == ast::BasicType::SignedChar |
---|
[60aaa51d] | 1234 | || bt->kind == ast::BasicType::UnsignedChar; |
---|
| 1235 | } |
---|
| 1236 | return false; |
---|
| 1237 | } |
---|
[2773ab8] | 1238 | |
---|
| 1239 | /// Advance a type itertor to the next mutex parameter |
---|
| 1240 | template<typename Iter> |
---|
| 1241 | inline bool nextMutex( Iter & it, const Iter & end ) { |
---|
[954c954] | 1242 | while ( it != end && ! (*it)->is_mutex() ) { ++it; } |
---|
[2773ab8] | 1243 | return it != end; |
---|
| 1244 | } |
---|
[99d4584] | 1245 | } |
---|
| 1246 | |
---|
[4864a73] | 1247 | class Resolver_new final |
---|
| 1248 | : public ast::WithSymbolTable, public ast::WithGuards, |
---|
| 1249 | public ast::WithVisitorRef<Resolver_new>, public ast::WithShortCircuiting, |
---|
[0e42794] | 1250 | public ast::WithStmtsToAdd<> { |
---|
[4864a73] | 1251 | |
---|
[2a8f0c1] | 1252 | ast::ptr< ast::Type > functionReturn = nullptr; |
---|
[2b59f55] | 1253 | ast::CurrentObject currentObject; |
---|
[16ba4a6f] | 1254 | // for work previously in GenInit |
---|
| 1255 | static InitTweak::ManagedTypes_new managedTypes; |
---|
[3bc69f2] | 1256 | ResolveContext context; |
---|
[16ba4a6f] | 1257 | |
---|
[99d4584] | 1258 | bool inEnumDecl = false; |
---|
[2a8f0c1] | 1259 | |
---|
[4864a73] | 1260 | public: |
---|
[c15085d] | 1261 | static size_t traceId; |
---|
[3bc69f2] | 1262 | Resolver_new( const ast::TranslationGlobal & global ) : |
---|
| 1263 | context{ symtab, global } {} |
---|
| 1264 | Resolver_new( const ResolveContext & context ) : |
---|
| 1265 | ast::WithSymbolTable{ context.symtab }, |
---|
| 1266 | context{ symtab, context.global } {} |
---|
[d76c588] | 1267 | |
---|
[16ba4a6f] | 1268 | const ast::FunctionDecl * previsit( const ast::FunctionDecl * ); |
---|
[99d4584] | 1269 | const ast::FunctionDecl * postvisit( const ast::FunctionDecl * ); |
---|
[16ba4a6f] | 1270 | const ast::ObjectDecl * previsit( const ast::ObjectDecl * ); |
---|
| 1271 | void previsit( const ast::AggregateDecl * ); |
---|
| 1272 | void previsit( const ast::StructDecl * ); |
---|
[99d4584] | 1273 | void previsit( const ast::EnumDecl * ); |
---|
| 1274 | const ast::StaticAssertDecl * previsit( const ast::StaticAssertDecl * ); |
---|
| 1275 | |
---|
[0f6a7752] | 1276 | const ast::ArrayType * previsit( const ast::ArrayType * ); |
---|
| 1277 | const ast::PointerType * previsit( const ast::PointerType * ); |
---|
[99d4584] | 1278 | |
---|
[2773ab8] | 1279 | const ast::ExprStmt * previsit( const ast::ExprStmt * ); |
---|
| 1280 | const ast::AsmExpr * previsit( const ast::AsmExpr * ); |
---|
| 1281 | const ast::AsmStmt * previsit( const ast::AsmStmt * ); |
---|
| 1282 | const ast::IfStmt * previsit( const ast::IfStmt * ); |
---|
[3bc69f2] | 1283 | const ast::WhileDoStmt * previsit( const ast::WhileDoStmt * ); |
---|
[2773ab8] | 1284 | const ast::ForStmt * previsit( const ast::ForStmt * ); |
---|
| 1285 | const ast::SwitchStmt * previsit( const ast::SwitchStmt * ); |
---|
[400b8be] | 1286 | const ast::CaseClause * previsit( const ast::CaseClause * ); |
---|
[2773ab8] | 1287 | const ast::BranchStmt * previsit( const ast::BranchStmt * ); |
---|
| 1288 | const ast::ReturnStmt * previsit( const ast::ReturnStmt * ); |
---|
| 1289 | const ast::ThrowStmt * previsit( const ast::ThrowStmt * ); |
---|
[400b8be] | 1290 | const ast::CatchClause * previsit( const ast::CatchClause * ); |
---|
| 1291 | const ast::CatchClause * postvisit( const ast::CatchClause * ); |
---|
[2773ab8] | 1292 | const ast::WaitForStmt * previsit( const ast::WaitForStmt * ); |
---|
[16ba4a6f] | 1293 | const ast::WithStmt * previsit( const ast::WithStmt * ); |
---|
[99d4584] | 1294 | |
---|
[2d11663] | 1295 | const ast::SingleInit * previsit( const ast::SingleInit * ); |
---|
| 1296 | const ast::ListInit * previsit( const ast::ListInit * ); |
---|
| 1297 | const ast::ConstructorInit * previsit( const ast::ConstructorInit * ); |
---|
[16ba4a6f] | 1298 | |
---|
| 1299 | void resolveWithExprs(std::vector<ast::ptr<ast::Expr>> & exprs, std::list<ast::ptr<ast::Stmt>> & stmtsToAdd); |
---|
| 1300 | |
---|
| 1301 | void beginScope() { managedTypes.beginScope(); } |
---|
| 1302 | void endScope() { managedTypes.endScope(); } |
---|
[e00c22f] | 1303 | bool on_error(ast::ptr<ast::Decl> & decl); |
---|
[d76c588] | 1304 | }; |
---|
[0d070ca] | 1305 | // size_t Resolver_new::traceId = Stats::Heap::new_stacktrace_id("Resolver"); |
---|
[d76c588] | 1306 | |
---|
[16ba4a6f] | 1307 | InitTweak::ManagedTypes_new Resolver_new::managedTypes; |
---|
| 1308 | |
---|
[293dc1c] | 1309 | void resolve( ast::TranslationUnit& translationUnit ) { |
---|
[3bc69f2] | 1310 | ast::Pass< Resolver_new >::run( translationUnit, translationUnit.global ); |
---|
[d76c588] | 1311 | } |
---|
| 1312 | |
---|
[ef5b828] | 1313 | ast::ptr< ast::Init > resolveCtorInit( |
---|
[39d8950] | 1314 | const ast::ConstructorInit * ctorInit, const ResolveContext & context |
---|
[234b1cb] | 1315 | ) { |
---|
| 1316 | assert( ctorInit ); |
---|
[3bc69f2] | 1317 | ast::Pass< Resolver_new > resolver( context ); |
---|
[234b1cb] | 1318 | return ctorInit->accept( resolver ); |
---|
| 1319 | } |
---|
| 1320 | |
---|
[302ef2a] | 1321 | const ast::Expr * resolveStmtExpr( |
---|
[39d8950] | 1322 | const ast::StmtExpr * stmtExpr, const ResolveContext & context |
---|
[17a0ede2] | 1323 | ) { |
---|
| 1324 | assert( stmtExpr ); |
---|
[3bc69f2] | 1325 | ast::Pass< Resolver_new > resolver( context ); |
---|
[302ef2a] | 1326 | auto ret = mutate(stmtExpr->accept(resolver)); |
---|
| 1327 | strict_dynamic_cast< ast::StmtExpr * >( ret )->computeResult(); |
---|
[17a0ede2] | 1328 | return ret; |
---|
| 1329 | } |
---|
| 1330 | |
---|
[16ba4a6f] | 1331 | namespace { |
---|
[39d8950] | 1332 | const ast::Attribute * handleAttribute(const CodeLocation & loc, const ast::Attribute * attr, const ResolveContext & context) { |
---|
[16ba4a6f] | 1333 | std::string name = attr->normalizedName(); |
---|
| 1334 | if (name == "constructor" || name == "destructor") { |
---|
| 1335 | if (attr->params.size() == 1) { |
---|
| 1336 | auto arg = attr->params.front(); |
---|
[39d8950] | 1337 | auto resolved = ResolvExpr::findSingleExpression( arg, new ast::BasicType( ast::BasicType::LongLongSignedInt ), context ); |
---|
[16ba4a6f] | 1338 | auto result = eval(arg); |
---|
| 1339 | |
---|
| 1340 | auto mutAttr = mutate(attr); |
---|
| 1341 | mutAttr->params.front() = resolved; |
---|
| 1342 | if (! result.second) { |
---|
| 1343 | SemanticWarning(loc, Warning::GccAttributes, |
---|
| 1344 | toCString( name, " priorities must be integers from 0 to 65535 inclusive: ", arg ) ); |
---|
| 1345 | } |
---|
| 1346 | else { |
---|
| 1347 | auto priority = result.first; |
---|
| 1348 | if (priority < 101) { |
---|
| 1349 | SemanticWarning(loc, Warning::GccAttributes, |
---|
| 1350 | toCString( name, " priorities from 0 to 100 are reserved for the implementation" ) ); |
---|
| 1351 | } else if (priority < 201 && ! buildingLibrary()) { |
---|
| 1352 | SemanticWarning(loc, Warning::GccAttributes, |
---|
| 1353 | toCString( name, " priorities from 101 to 200 are reserved for the implementation" ) ); |
---|
| 1354 | } |
---|
| 1355 | } |
---|
| 1356 | return mutAttr; |
---|
| 1357 | } else if (attr->params.size() > 1) { |
---|
| 1358 | SemanticWarning(loc, Warning::GccAttributes, toCString( "too many arguments to ", name, " attribute" ) ); |
---|
| 1359 | } else { |
---|
| 1360 | SemanticWarning(loc, Warning::GccAttributes, toCString( "too few arguments to ", name, " attribute" ) ); |
---|
| 1361 | } |
---|
| 1362 | } |
---|
| 1363 | return attr; |
---|
| 1364 | } |
---|
| 1365 | } |
---|
| 1366 | |
---|
| 1367 | const ast::FunctionDecl * Resolver_new::previsit( const ast::FunctionDecl * functionDecl ) { |
---|
[2a8f0c1] | 1368 | GuardValue( functionReturn ); |
---|
[16ba4a6f] | 1369 | |
---|
| 1370 | assert (functionDecl->unique()); |
---|
| 1371 | if (!functionDecl->has_body() && !functionDecl->withExprs.empty()) { |
---|
| 1372 | SemanticError(functionDecl->location, functionDecl, "Function without body has with declarations"); |
---|
| 1373 | } |
---|
| 1374 | |
---|
| 1375 | if (!functionDecl->isTypeFixed) { |
---|
| 1376 | auto mutDecl = mutate(functionDecl); |
---|
| 1377 | auto mutType = mutDecl->type.get_and_mutate(); |
---|
| 1378 | |
---|
| 1379 | for (auto & attr: mutDecl->attributes) { |
---|
[3bc69f2] | 1380 | attr = handleAttribute(mutDecl->location, attr, context ); |
---|
[16ba4a6f] | 1381 | } |
---|
| 1382 | |
---|
[3e5dd913] | 1383 | // handle assertions |
---|
[16ba4a6f] | 1384 | |
---|
| 1385 | symtab.enterScope(); |
---|
[3e5dd913] | 1386 | mutType->forall.clear(); |
---|
| 1387 | mutType->assertions.clear(); |
---|
| 1388 | for (auto & typeParam : mutDecl->type_params) { |
---|
| 1389 | symtab.addType(typeParam); |
---|
[b230091] | 1390 | mutType->forall.emplace_back(new ast::TypeInstType(typeParam)); |
---|
[3e5dd913] | 1391 | } |
---|
| 1392 | for (auto & asst : mutDecl->assertions) { |
---|
[3bc69f2] | 1393 | asst = fixObjectType(asst.strict_as<ast::ObjectDecl>(), context); |
---|
[3e5dd913] | 1394 | symtab.addId(asst); |
---|
| 1395 | mutType->assertions.emplace_back(new ast::VariableExpr(functionDecl->location, asst)); |
---|
[16ba4a6f] | 1396 | } |
---|
| 1397 | |
---|
| 1398 | // temporarily adds params to symbol table. |
---|
| 1399 | // actual scoping rules for params and withexprs differ - see Pass::visit(FunctionDecl) |
---|
| 1400 | |
---|
| 1401 | std::vector<ast::ptr<ast::Type>> paramTypes; |
---|
| 1402 | std::vector<ast::ptr<ast::Type>> returnTypes; |
---|
| 1403 | |
---|
| 1404 | for (auto & param : mutDecl->params) { |
---|
[3bc69f2] | 1405 | param = fixObjectType(param.strict_as<ast::ObjectDecl>(), context); |
---|
[16ba4a6f] | 1406 | symtab.addId(param); |
---|
| 1407 | paramTypes.emplace_back(param->get_type()); |
---|
| 1408 | } |
---|
| 1409 | for (auto & ret : mutDecl->returns) { |
---|
[3bc69f2] | 1410 | ret = fixObjectType(ret.strict_as<ast::ObjectDecl>(), context); |
---|
[16ba4a6f] | 1411 | returnTypes.emplace_back(ret->get_type()); |
---|
| 1412 | } |
---|
| 1413 | // since function type in decl is just a view of param types, need to update that as well |
---|
| 1414 | mutType->params = std::move(paramTypes); |
---|
| 1415 | mutType->returns = std::move(returnTypes); |
---|
| 1416 | |
---|
[3e5dd913] | 1417 | auto renamedType = strict_dynamic_cast<const ast::FunctionType *>(renameTyVars(mutType, RenameMode::GEN_EXPR_ID)); |
---|
| 1418 | |
---|
[16ba4a6f] | 1419 | std::list<ast::ptr<ast::Stmt>> newStmts; |
---|
| 1420 | resolveWithExprs (mutDecl->withExprs, newStmts); |
---|
| 1421 | |
---|
| 1422 | if (mutDecl->stmts) { |
---|
| 1423 | auto mutStmt = mutDecl->stmts.get_and_mutate(); |
---|
| 1424 | mutStmt->kids.splice(mutStmt->kids.begin(), std::move(newStmts)); |
---|
| 1425 | mutDecl->stmts = mutStmt; |
---|
| 1426 | } |
---|
| 1427 | |
---|
| 1428 | symtab.leaveScope(); |
---|
| 1429 | |
---|
[3e5dd913] | 1430 | mutDecl->type = renamedType; |
---|
[16ba4a6f] | 1431 | mutDecl->mangleName = Mangle::mangle(mutDecl); |
---|
| 1432 | mutDecl->isTypeFixed = true; |
---|
| 1433 | functionDecl = mutDecl; |
---|
| 1434 | } |
---|
| 1435 | managedTypes.handleDWT(functionDecl); |
---|
| 1436 | |
---|
[2a8f0c1] | 1437 | functionReturn = extractResultType( functionDecl->type ); |
---|
[16ba4a6f] | 1438 | return functionDecl; |
---|
[d76c588] | 1439 | } |
---|
| 1440 | |
---|
[2a8f0c1] | 1441 | const ast::FunctionDecl * Resolver_new::postvisit( const ast::FunctionDecl * functionDecl ) { |
---|
[4864a73] | 1442 | // default value expressions have an environment which shouldn't be there and trips up |
---|
[2a8f0c1] | 1443 | // later passes. |
---|
[e068c8a] | 1444 | assert( functionDecl->unique() ); |
---|
| 1445 | ast::FunctionType * mutType = mutate( functionDecl->type.get() ); |
---|
| 1446 | |
---|
| 1447 | for ( unsigned i = 0 ; i < mutType->params.size() ; ++i ) { |
---|
| 1448 | if ( const ast::ObjectDecl * obj = mutType->params[i].as< ast::ObjectDecl >() ) { |
---|
| 1449 | if ( const ast::SingleInit * init = obj->init.as< ast::SingleInit >() ) { |
---|
| 1450 | if ( init->value->env == nullptr ) continue; |
---|
| 1451 | // clone initializer minus the initializer environment |
---|
| 1452 | auto mutParam = mutate( mutType->params[i].strict_as< ast::ObjectDecl >() ); |
---|
| 1453 | auto mutInit = mutate( mutParam->init.strict_as< ast::SingleInit >() ); |
---|
| 1454 | auto mutValue = mutate( mutInit->value.get() ); |
---|
| 1455 | |
---|
| 1456 | mutValue->env = nullptr; |
---|
| 1457 | mutInit->value = mutValue; |
---|
| 1458 | mutParam->init = mutInit; |
---|
| 1459 | mutType->params[i] = mutParam; |
---|
| 1460 | |
---|
| 1461 | assert( ! mutType->params[i].strict_as< ast::ObjectDecl >()->init.strict_as< ast::SingleInit >()->value->env); |
---|
| 1462 | } |
---|
| 1463 | } |
---|
[2a8f0c1] | 1464 | } |
---|
[73973b6] | 1465 | mutate_field(functionDecl, &ast::FunctionDecl::type, mutType); |
---|
| 1466 | return functionDecl; |
---|
[d76c588] | 1467 | } |
---|
| 1468 | |
---|
[16ba4a6f] | 1469 | const ast::ObjectDecl * Resolver_new::previsit( const ast::ObjectDecl * objectDecl ) { |
---|
[ef5b828] | 1470 | // To handle initialization of routine pointers [e.g. int (*fp)(int) = foo()], |
---|
| 1471 | // class-variable `initContext` is changed multiple times because the LHS is analyzed |
---|
| 1472 | // twice. The second analysis changes `initContext` because a function type can contain |
---|
| 1473 | // object declarations in the return and parameter types. Therefore each value of |
---|
| 1474 | // `initContext` is retained so the type on the first analysis is preserved and used for |
---|
[b7d92b96] | 1475 | // selecting the RHS. |
---|
| 1476 | GuardValue( currentObject ); |
---|
[16ba4a6f] | 1477 | |
---|
[b7d92b96] | 1478 | if ( inEnumDecl && dynamic_cast< const ast::EnumInstType * >( objectDecl->get_type() ) ) { |
---|
[ef5b828] | 1479 | // enumerator initializers should not use the enum type to initialize, since the |
---|
[b7d92b96] | 1480 | // enum type is still incomplete at this point. Use `int` instead. |
---|
[4559b34] | 1481 | |
---|
[12df6fe] | 1482 | if ( auto enumBase = dynamic_cast< const ast::EnumInstType * > |
---|
| 1483 | ( objectDecl->get_type() )->base->base ) { |
---|
[5bb1ac1] | 1484 | objectDecl = fixObjectType( objectDecl, context ); |
---|
| 1485 | currentObject = ast::CurrentObject{ |
---|
| 1486 | objectDecl->location, |
---|
| 1487 | enumBase |
---|
| 1488 | }; |
---|
[4559b34] | 1489 | } else { |
---|
[5bb1ac1] | 1490 | objectDecl = fixObjectType( objectDecl, context ); |
---|
[4559b34] | 1491 | currentObject = ast::CurrentObject{ |
---|
| 1492 | objectDecl->location, new ast::BasicType{ ast::BasicType::SignedInt } }; |
---|
| 1493 | } |
---|
| 1494 | |
---|
[b7d92b96] | 1495 | } |
---|
[16ba4a6f] | 1496 | else { |
---|
[12df6fe] | 1497 | if ( !objectDecl->isTypeFixed ) { |
---|
[3bc69f2] | 1498 | auto newDecl = fixObjectType(objectDecl, context); |
---|
[16ba4a6f] | 1499 | auto mutDecl = mutate(newDecl); |
---|
[4a8f150] | 1500 | |
---|
[16ba4a6f] | 1501 | // generate CtorInit wrapper when necessary. |
---|
| 1502 | // in certain cases, fixObjectType is called before reaching |
---|
| 1503 | // this object in visitor pass, thus disabling CtorInit codegen. |
---|
| 1504 | // this happens on aggregate members and function parameters. |
---|
| 1505 | if ( InitTweak::tryConstruct( mutDecl ) && ( managedTypes.isManaged( mutDecl ) || ((! isInFunction() || mutDecl->storage.is_static ) && ! InitTweak::isConstExpr( mutDecl->init ) ) ) ) { |
---|
| 1506 | // constructed objects cannot be designated |
---|
| 1507 | if ( InitTweak::isDesignated( mutDecl->init ) ) SemanticError( mutDecl, "Cannot include designations in the initializer for a managed Object. If this is really what you want, then initialize with @=.\n" ); |
---|
| 1508 | // constructed objects should not have initializers nested too deeply |
---|
| 1509 | if ( ! InitTweak::checkInitDepth( mutDecl ) ) SemanticError( mutDecl, "Managed object's initializer is too deep " ); |
---|
| 1510 | |
---|
| 1511 | mutDecl->init = InitTweak::genCtorInit( mutDecl->location, mutDecl ); |
---|
| 1512 | } |
---|
| 1513 | |
---|
| 1514 | objectDecl = mutDecl; |
---|
| 1515 | } |
---|
| 1516 | currentObject = ast::CurrentObject{ objectDecl->location, objectDecl->get_type() }; |
---|
| 1517 | } |
---|
[4a8f150] | 1518 | |
---|
[16ba4a6f] | 1519 | return objectDecl; |
---|
| 1520 | } |
---|
| 1521 | |
---|
| 1522 | void Resolver_new::previsit( const ast::AggregateDecl * _aggDecl ) { |
---|
| 1523 | auto aggDecl = mutate(_aggDecl); |
---|
| 1524 | assertf(aggDecl == _aggDecl, "type declarations must be unique"); |
---|
| 1525 | |
---|
| 1526 | for (auto & member: aggDecl->members) { |
---|
| 1527 | // nested type decls are hoisted already. no need to do anything |
---|
| 1528 | if (auto obj = member.as<ast::ObjectDecl>()) { |
---|
[3bc69f2] | 1529 | member = fixObjectType(obj, context); |
---|
[16ba4a6f] | 1530 | } |
---|
| 1531 | } |
---|
| 1532 | } |
---|
| 1533 | |
---|
| 1534 | void Resolver_new::previsit( const ast::StructDecl * structDecl ) { |
---|
| 1535 | previsit(static_cast<const ast::AggregateDecl *>(structDecl)); |
---|
| 1536 | managedTypes.handleStruct(structDecl); |
---|
[d76c588] | 1537 | } |
---|
| 1538 | |
---|
[99d4584] | 1539 | void Resolver_new::previsit( const ast::EnumDecl * ) { |
---|
| 1540 | // in case we decide to allow nested enums |
---|
| 1541 | GuardValue( inEnumDecl ); |
---|
[2890212] | 1542 | inEnumDecl = true; |
---|
[16ba4a6f] | 1543 | // don't need to fix types for enum fields |
---|
[d76c588] | 1544 | } |
---|
| 1545 | |
---|
[ef5b828] | 1546 | const ast::StaticAssertDecl * Resolver_new::previsit( |
---|
| 1547 | const ast::StaticAssertDecl * assertDecl |
---|
[99d4584] | 1548 | ) { |
---|
[ef5b828] | 1549 | return ast::mutate_field( |
---|
| 1550 | assertDecl, &ast::StaticAssertDecl::cond, |
---|
[3bc69f2] | 1551 | findIntegralExpression( assertDecl->cond, context ) ); |
---|
[b7d92b96] | 1552 | } |
---|
| 1553 | |
---|
| 1554 | template< typename PtrType > |
---|
[39d8950] | 1555 | const PtrType * handlePtrType( const PtrType * type, const ResolveContext & context ) { |
---|
[0f6a7752] | 1556 | if ( type->dimension ) { |
---|
[5cf1228] | 1557 | const ast::Type * sizeType = context.global.sizeType.get(); |
---|
[9e23b446] | 1558 | ast::ptr< ast::Expr > dimension = findSingleExpression( type->dimension, sizeType, context ); |
---|
| 1559 | assertf(dimension->env->empty(), "array dimension expr has nonempty env"); |
---|
| 1560 | dimension.get_and_mutate()->env = nullptr; |
---|
[5cf1228] | 1561 | ast::mutate_field( type, &PtrType::dimension, dimension ); |
---|
[0f6a7752] | 1562 | } |
---|
| 1563 | return type; |
---|
[d76c588] | 1564 | } |
---|
| 1565 | |
---|
[0f6a7752] | 1566 | const ast::ArrayType * Resolver_new::previsit( const ast::ArrayType * at ) { |
---|
[3bc69f2] | 1567 | return handlePtrType( at, context ); |
---|
[d76c588] | 1568 | } |
---|
| 1569 | |
---|
[0f6a7752] | 1570 | const ast::PointerType * Resolver_new::previsit( const ast::PointerType * pt ) { |
---|
[3bc69f2] | 1571 | return handlePtrType( pt, context ); |
---|
[d76c588] | 1572 | } |
---|
| 1573 | |
---|
[b7d92b96] | 1574 | const ast::ExprStmt * Resolver_new::previsit( const ast::ExprStmt * exprStmt ) { |
---|
| 1575 | visit_children = false; |
---|
| 1576 | assertf( exprStmt->expr, "ExprStmt has null expression in resolver" ); |
---|
[ef5b828] | 1577 | |
---|
| 1578 | return ast::mutate_field( |
---|
[3bc69f2] | 1579 | exprStmt, &ast::ExprStmt::expr, findVoidExpression( exprStmt->expr, context ) ); |
---|
[d76c588] | 1580 | } |
---|
| 1581 | |
---|
[b7d92b96] | 1582 | const ast::AsmExpr * Resolver_new::previsit( const ast::AsmExpr * asmExpr ) { |
---|
| 1583 | visit_children = false; |
---|
| 1584 | |
---|
[ef5b828] | 1585 | asmExpr = ast::mutate_field( |
---|
[3bc69f2] | 1586 | asmExpr, &ast::AsmExpr::operand, findVoidExpression( asmExpr->operand, context ) ); |
---|
[ef5b828] | 1587 | |
---|
[b7d92b96] | 1588 | return asmExpr; |
---|
[d76c588] | 1589 | } |
---|
| 1590 | |
---|
[2b59f55] | 1591 | const ast::AsmStmt * Resolver_new::previsit( const ast::AsmStmt * asmStmt ) { |
---|
| 1592 | visitor->maybe_accept( asmStmt, &ast::AsmStmt::input ); |
---|
| 1593 | visitor->maybe_accept( asmStmt, &ast::AsmStmt::output ); |
---|
| 1594 | visit_children = false; |
---|
| 1595 | return asmStmt; |
---|
[d76c588] | 1596 | } |
---|
| 1597 | |
---|
[b7d92b96] | 1598 | const ast::IfStmt * Resolver_new::previsit( const ast::IfStmt * ifStmt ) { |
---|
| 1599 | return ast::mutate_field( |
---|
[3bc69f2] | 1600 | ifStmt, &ast::IfStmt::cond, findIntegralExpression( ifStmt->cond, context ) ); |
---|
[d76c588] | 1601 | } |
---|
| 1602 | |
---|
[3b0bc16] | 1603 | const ast::WhileDoStmt * Resolver_new::previsit( const ast::WhileDoStmt * whileDoStmt ) { |
---|
[ef5b828] | 1604 | return ast::mutate_field( |
---|
[3bc69f2] | 1605 | whileDoStmt, &ast::WhileDoStmt::cond, findIntegralExpression( whileDoStmt->cond, context ) ); |
---|
[d76c588] | 1606 | } |
---|
| 1607 | |
---|
[b7d92b96] | 1608 | const ast::ForStmt * Resolver_new::previsit( const ast::ForStmt * forStmt ) { |
---|
| 1609 | if ( forStmt->cond ) { |
---|
| 1610 | forStmt = ast::mutate_field( |
---|
[3bc69f2] | 1611 | forStmt, &ast::ForStmt::cond, findIntegralExpression( forStmt->cond, context ) ); |
---|
[b7d92b96] | 1612 | } |
---|
| 1613 | |
---|
| 1614 | if ( forStmt->inc ) { |
---|
| 1615 | forStmt = ast::mutate_field( |
---|
[3bc69f2] | 1616 | forStmt, &ast::ForStmt::inc, findVoidExpression( forStmt->inc, context ) ); |
---|
[b7d92b96] | 1617 | } |
---|
| 1618 | |
---|
| 1619 | return forStmt; |
---|
[d76c588] | 1620 | } |
---|
| 1621 | |
---|
[b7d92b96] | 1622 | const ast::SwitchStmt * Resolver_new::previsit( const ast::SwitchStmt * switchStmt ) { |
---|
| 1623 | GuardValue( currentObject ); |
---|
| 1624 | switchStmt = ast::mutate_field( |
---|
[ef5b828] | 1625 | switchStmt, &ast::SwitchStmt::cond, |
---|
[3bc69f2] | 1626 | findIntegralExpression( switchStmt->cond, context ) ); |
---|
[2b59f55] | 1627 | currentObject = ast::CurrentObject{ switchStmt->location, switchStmt->cond->result }; |
---|
[b7d92b96] | 1628 | return switchStmt; |
---|
[d76c588] | 1629 | } |
---|
| 1630 | |
---|
[400b8be] | 1631 | const ast::CaseClause * Resolver_new::previsit( const ast::CaseClause * caseStmt ) { |
---|
[b7d92b96] | 1632 | if ( caseStmt->cond ) { |
---|
[60aaa51d] | 1633 | std::deque< ast::InitAlternative > initAlts = currentObject.getOptions(); |
---|
[2b59f55] | 1634 | assertf( initAlts.size() == 1, "SwitchStmt did not correctly resolve an integral " |
---|
| 1635 | "expression." ); |
---|
[ef5b828] | 1636 | |
---|
| 1637 | ast::ptr< ast::Expr > untyped = |
---|
[2b59f55] | 1638 | new ast::CastExpr{ caseStmt->location, caseStmt->cond, initAlts.front().type }; |
---|
[3bc69f2] | 1639 | ast::ptr< ast::Expr > newExpr = findSingleExpression( untyped, context ); |
---|
[ef5b828] | 1640 | |
---|
| 1641 | // case condition cannot have a cast in C, so it must be removed here, regardless of |
---|
[2b59f55] | 1642 | // whether it would perform a conversion. |
---|
| 1643 | if ( const ast::CastExpr * castExpr = newExpr.as< ast::CastExpr >() ) { |
---|
[60aaa51d] | 1644 | swap_and_save_env( newExpr, castExpr->arg ); |
---|
[2b59f55] | 1645 | } |
---|
[ef5b828] | 1646 | |
---|
[400b8be] | 1647 | caseStmt = ast::mutate_field( caseStmt, &ast::CaseClause::cond, newExpr ); |
---|
[b7d92b96] | 1648 | } |
---|
| 1649 | return caseStmt; |
---|
[d76c588] | 1650 | } |
---|
| 1651 | |
---|
[b7d92b96] | 1652 | const ast::BranchStmt * Resolver_new::previsit( const ast::BranchStmt * branchStmt ) { |
---|
| 1653 | visit_children = false; |
---|
| 1654 | // must resolve the argument of a computed goto |
---|
| 1655 | if ( branchStmt->kind == ast::BranchStmt::Goto && branchStmt->computedTarget ) { |
---|
| 1656 | // computed goto argument is void* |
---|
[2773ab8] | 1657 | ast::ptr< ast::Type > target = new ast::PointerType{ new ast::VoidType{} }; |
---|
[b7d92b96] | 1658 | branchStmt = ast::mutate_field( |
---|
[ef5b828] | 1659 | branchStmt, &ast::BranchStmt::computedTarget, |
---|
[3bc69f2] | 1660 | findSingleExpression( branchStmt->computedTarget, target, context ) ); |
---|
[b7d92b96] | 1661 | } |
---|
| 1662 | return branchStmt; |
---|
[d76c588] | 1663 | } |
---|
| 1664 | |
---|
[2b59f55] | 1665 | const ast::ReturnStmt * Resolver_new::previsit( const ast::ReturnStmt * returnStmt ) { |
---|
| 1666 | visit_children = false; |
---|
| 1667 | if ( returnStmt->expr ) { |
---|
| 1668 | returnStmt = ast::mutate_field( |
---|
[ef5b828] | 1669 | returnStmt, &ast::ReturnStmt::expr, |
---|
[3bc69f2] | 1670 | findSingleExpression( returnStmt->expr, functionReturn, context ) ); |
---|
[2b59f55] | 1671 | } |
---|
| 1672 | return returnStmt; |
---|
[d76c588] | 1673 | } |
---|
| 1674 | |
---|
[2b59f55] | 1675 | const ast::ThrowStmt * Resolver_new::previsit( const ast::ThrowStmt * throwStmt ) { |
---|
| 1676 | visit_children = false; |
---|
| 1677 | if ( throwStmt->expr ) { |
---|
[ef5b828] | 1678 | const ast::StructDecl * exceptionDecl = |
---|
[3090127] | 1679 | symtab.lookupStruct( "__cfaehm_base_exception_t" ); |
---|
[2b59f55] | 1680 | assert( exceptionDecl ); |
---|
[ef5b828] | 1681 | ast::ptr< ast::Type > exceptType = |
---|
[2b59f55] | 1682 | new ast::PointerType{ new ast::StructInstType{ exceptionDecl } }; |
---|
| 1683 | throwStmt = ast::mutate_field( |
---|
[ef5b828] | 1684 | throwStmt, &ast::ThrowStmt::expr, |
---|
[3bc69f2] | 1685 | findSingleExpression( throwStmt->expr, exceptType, context ) ); |
---|
[2b59f55] | 1686 | } |
---|
| 1687 | return throwStmt; |
---|
[d76c588] | 1688 | } |
---|
| 1689 | |
---|
[400b8be] | 1690 | const ast::CatchClause * Resolver_new::previsit( const ast::CatchClause * catchClause ) { |
---|
[3b0bc16] | 1691 | // Until we are very sure this invarent (ifs that move between passes have then) |
---|
[b9fa85b] | 1692 | // holds, check it. This allows a check for when to decode the mangling. |
---|
[400b8be] | 1693 | if ( auto ifStmt = catchClause->body.as<ast::IfStmt>() ) { |
---|
[3b0bc16] | 1694 | assert( ifStmt->then ); |
---|
[b9fa85b] | 1695 | } |
---|
| 1696 | // Encode the catchStmt so the condition can see the declaration. |
---|
[400b8be] | 1697 | if ( catchClause->cond ) { |
---|
| 1698 | ast::CatchClause * clause = mutate( catchClause ); |
---|
| 1699 | clause->body = new ast::IfStmt( clause->location, clause->cond, nullptr, clause->body ); |
---|
| 1700 | clause->cond = nullptr; |
---|
| 1701 | return clause; |
---|
[b9fa85b] | 1702 | } |
---|
[400b8be] | 1703 | return catchClause; |
---|
[b9fa85b] | 1704 | } |
---|
| 1705 | |
---|
[400b8be] | 1706 | const ast::CatchClause * Resolver_new::postvisit( const ast::CatchClause * catchClause ) { |
---|
[b9fa85b] | 1707 | // Decode the catchStmt so everything is stored properly. |
---|
[400b8be] | 1708 | const ast::IfStmt * ifStmt = catchClause->body.as<ast::IfStmt>(); |
---|
[3b0bc16] | 1709 | if ( nullptr != ifStmt && nullptr == ifStmt->then ) { |
---|
[b9fa85b] | 1710 | assert( ifStmt->cond ); |
---|
[3b0bc16] | 1711 | assert( ifStmt->else_ ); |
---|
[400b8be] | 1712 | ast::CatchClause * clause = ast::mutate( catchClause ); |
---|
| 1713 | clause->cond = ifStmt->cond; |
---|
| 1714 | clause->body = ifStmt->else_; |
---|
[b9fa85b] | 1715 | // ifStmt should be implicately deleted here. |
---|
[400b8be] | 1716 | return clause; |
---|
[2b59f55] | 1717 | } |
---|
[400b8be] | 1718 | return catchClause; |
---|
[d76c588] | 1719 | } |
---|
| 1720 | |
---|
[2773ab8] | 1721 | const ast::WaitForStmt * Resolver_new::previsit( const ast::WaitForStmt * stmt ) { |
---|
| 1722 | visit_children = false; |
---|
| 1723 | |
---|
| 1724 | // Resolve all clauses first |
---|
| 1725 | for ( unsigned i = 0; i < stmt->clauses.size(); ++i ) { |
---|
[f6e6a55] | 1726 | const ast::WaitForClause & clause = *stmt->clauses[i]; |
---|
[2773ab8] | 1727 | |
---|
| 1728 | ast::TypeEnvironment env; |
---|
[3bc69f2] | 1729 | CandidateFinder funcFinder( context, env ); |
---|
[2773ab8] | 1730 | |
---|
| 1731 | // Find all candidates for a function in canonical form |
---|
[c86b08d] | 1732 | funcFinder.find( clause.target, ResolvMode::withAdjustment() ); |
---|
[2773ab8] | 1733 | |
---|
| 1734 | if ( funcFinder.candidates.empty() ) { |
---|
| 1735 | stringstream ss; |
---|
| 1736 | ss << "Use of undeclared indentifier '"; |
---|
[c86b08d] | 1737 | ss << clause.target.strict_as< ast::NameExpr >()->name; |
---|
[2773ab8] | 1738 | ss << "' in call to waitfor"; |
---|
| 1739 | SemanticError( stmt->location, ss.str() ); |
---|
| 1740 | } |
---|
| 1741 | |
---|
[f6e6a55] | 1742 | if ( clause.target_args.empty() ) { |
---|
[ef5b828] | 1743 | SemanticError( stmt->location, |
---|
[2773ab8] | 1744 | "Waitfor clause must have at least one mutex parameter"); |
---|
| 1745 | } |
---|
| 1746 | |
---|
| 1747 | // Find all alternatives for all arguments in canonical form |
---|
[ef5b828] | 1748 | std::vector< CandidateFinder > argFinders = |
---|
[f6e6a55] | 1749 | funcFinder.findSubExprs( clause.target_args ); |
---|
[ef5b828] | 1750 | |
---|
[2773ab8] | 1751 | // List all combinations of arguments |
---|
| 1752 | std::vector< CandidateList > possibilities; |
---|
| 1753 | combos( argFinders.begin(), argFinders.end(), back_inserter( possibilities ) ); |
---|
| 1754 | |
---|
| 1755 | // For every possible function: |
---|
[ef5b828] | 1756 | // * try matching the arguments to the parameters, not the other way around because |
---|
[2773ab8] | 1757 | // more arguments than parameters |
---|
| 1758 | CandidateList funcCandidates; |
---|
| 1759 | std::vector< CandidateList > argsCandidates; |
---|
| 1760 | SemanticErrorException errors; |
---|
| 1761 | for ( CandidateRef & func : funcFinder.candidates ) { |
---|
| 1762 | try { |
---|
[ef5b828] | 1763 | auto pointerType = dynamic_cast< const ast::PointerType * >( |
---|
[2773ab8] | 1764 | func->expr->result->stripReferences() ); |
---|
| 1765 | if ( ! pointerType ) { |
---|
[ef5b828] | 1766 | SemanticError( stmt->location, func->expr->result.get(), |
---|
[2773ab8] | 1767 | "candidate not viable: not a pointer type\n" ); |
---|
| 1768 | } |
---|
| 1769 | |
---|
| 1770 | auto funcType = pointerType->base.as< ast::FunctionType >(); |
---|
| 1771 | if ( ! funcType ) { |
---|
[ef5b828] | 1772 | SemanticError( stmt->location, func->expr->result.get(), |
---|
[2773ab8] | 1773 | "candidate not viable: not a function type\n" ); |
---|
| 1774 | } |
---|
| 1775 | |
---|
| 1776 | { |
---|
| 1777 | auto param = funcType->params.begin(); |
---|
| 1778 | auto paramEnd = funcType->params.end(); |
---|
| 1779 | |
---|
| 1780 | if( ! nextMutex( param, paramEnd ) ) { |
---|
[ef5b828] | 1781 | SemanticError( stmt->location, funcType, |
---|
[2773ab8] | 1782 | "candidate function not viable: no mutex parameters\n"); |
---|
| 1783 | } |
---|
| 1784 | } |
---|
| 1785 | |
---|
| 1786 | CandidateRef func2{ new Candidate{ *func } }; |
---|
| 1787 | // strip reference from function |
---|
| 1788 | func2->expr = referenceToRvalueConversion( func->expr, func2->cost ); |
---|
| 1789 | |
---|
| 1790 | // Each argument must be matched with a parameter of the current candidate |
---|
| 1791 | for ( auto & argsList : possibilities ) { |
---|
| 1792 | try { |
---|
| 1793 | // Declare data structures needed for resolution |
---|
| 1794 | ast::OpenVarSet open; |
---|
| 1795 | ast::AssertionSet need, have; |
---|
| 1796 | ast::TypeEnvironment resultEnv{ func->env }; |
---|
[ef5b828] | 1797 | // Add all type variables as open so that those not used in the |
---|
[2773ab8] | 1798 | // parameter list are still considered open |
---|
| 1799 | resultEnv.add( funcType->forall ); |
---|
| 1800 | |
---|
| 1801 | // load type variables from arguments into one shared space |
---|
| 1802 | for ( auto & arg : argsList ) { |
---|
| 1803 | resultEnv.simpleCombine( arg->env ); |
---|
| 1804 | } |
---|
| 1805 | |
---|
| 1806 | // Make sure we don't widen any existing bindings |
---|
| 1807 | resultEnv.forbidWidening(); |
---|
| 1808 | |
---|
| 1809 | // Find any unbound type variables |
---|
| 1810 | resultEnv.extractOpenVars( open ); |
---|
| 1811 | |
---|
| 1812 | auto param = funcType->params.begin(); |
---|
| 1813 | auto paramEnd = funcType->params.end(); |
---|
| 1814 | |
---|
| 1815 | unsigned n_mutex_param = 0; |
---|
| 1816 | |
---|
[ef5b828] | 1817 | // For every argument of its set, check if it matches one of the |
---|
[2773ab8] | 1818 | // parameters. The order is important |
---|
| 1819 | for ( auto & arg : argsList ) { |
---|
| 1820 | // Ignore non-mutex arguments |
---|
| 1821 | if ( ! nextMutex( param, paramEnd ) ) { |
---|
| 1822 | // We ran out of parameters but still have arguments. |
---|
| 1823 | // This function doesn't match |
---|
[ef5b828] | 1824 | SemanticError( stmt->location, funcType, |
---|
[2773ab8] | 1825 | toString("candidate function not viable: too many mutex " |
---|
| 1826 | "arguments, expected ", n_mutex_param, "\n" ) ); |
---|
| 1827 | } |
---|
| 1828 | |
---|
| 1829 | ++n_mutex_param; |
---|
| 1830 | |
---|
[ef5b828] | 1831 | // Check if the argument matches the parameter type in the current |
---|
[2773ab8] | 1832 | // scope |
---|
[954c954] | 1833 | // ast::ptr< ast::Type > paramType = (*param)->get_type(); |
---|
[ef5b828] | 1834 | if ( |
---|
| 1835 | ! unify( |
---|
[251ce80] | 1836 | arg->expr->result, *param, resultEnv, need, have, open ) |
---|
[2773ab8] | 1837 | ) { |
---|
| 1838 | // Type doesn't match |
---|
| 1839 | stringstream ss; |
---|
| 1840 | ss << "candidate function not viable: no known conversion " |
---|
| 1841 | "from '"; |
---|
[954c954] | 1842 | ast::print( ss, *param ); |
---|
[2773ab8] | 1843 | ss << "' to '"; |
---|
| 1844 | ast::print( ss, arg->expr->result ); |
---|
| 1845 | ss << "' with env '"; |
---|
| 1846 | ast::print( ss, resultEnv ); |
---|
| 1847 | ss << "'\n"; |
---|
| 1848 | SemanticError( stmt->location, funcType, ss.str() ); |
---|
| 1849 | } |
---|
| 1850 | |
---|
| 1851 | ++param; |
---|
| 1852 | } |
---|
| 1853 | |
---|
| 1854 | // All arguments match! |
---|
| 1855 | |
---|
| 1856 | // Check if parameters are missing |
---|
| 1857 | if ( nextMutex( param, paramEnd ) ) { |
---|
| 1858 | do { |
---|
| 1859 | ++n_mutex_param; |
---|
| 1860 | ++param; |
---|
| 1861 | } while ( nextMutex( param, paramEnd ) ); |
---|
| 1862 | |
---|
[ef5b828] | 1863 | // We ran out of arguments but still have parameters left; this |
---|
[2773ab8] | 1864 | // function doesn't match |
---|
[ef5b828] | 1865 | SemanticError( stmt->location, funcType, |
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[2773ab8] | 1866 | toString( "candidate function not viable: too few mutex " |
---|
| 1867 | "arguments, expected ", n_mutex_param, "\n" ) ); |
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| 1868 | } |
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| 1869 | |
---|
| 1870 | // All parameters match! |
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| 1871 | |
---|
| 1872 | // Finish the expressions to tie in proper environments |
---|
| 1873 | finishExpr( func2->expr, resultEnv ); |
---|
| 1874 | for ( CandidateRef & arg : argsList ) { |
---|
| 1875 | finishExpr( arg->expr, resultEnv ); |
---|
| 1876 | } |
---|
| 1877 | |
---|
| 1878 | // This is a match, store it and save it for later |
---|
| 1879 | funcCandidates.emplace_back( std::move( func2 ) ); |
---|
| 1880 | argsCandidates.emplace_back( std::move( argsList ) ); |
---|
| 1881 | |
---|
| 1882 | } catch ( SemanticErrorException & e ) { |
---|
| 1883 | errors.append( e ); |
---|
| 1884 | } |
---|
| 1885 | } |
---|
| 1886 | } catch ( SemanticErrorException & e ) { |
---|
| 1887 | errors.append( e ); |
---|
| 1888 | } |
---|
| 1889 | } |
---|
| 1890 | |
---|
| 1891 | // Make sure correct number of arguments |
---|
| 1892 | if( funcCandidates.empty() ) { |
---|
[ef5b828] | 1893 | SemanticErrorException top( stmt->location, |
---|
[2773ab8] | 1894 | "No alternatives for function in call to waitfor" ); |
---|
| 1895 | top.append( errors ); |
---|
| 1896 | throw top; |
---|
| 1897 | } |
---|
| 1898 | |
---|
| 1899 | if( argsCandidates.empty() ) { |
---|
[ef5b828] | 1900 | SemanticErrorException top( stmt->location, |
---|
| 1901 | "No alternatives for arguments in call to waitfor" ); |
---|
[2773ab8] | 1902 | top.append( errors ); |
---|
| 1903 | throw top; |
---|
| 1904 | } |
---|
| 1905 | |
---|
| 1906 | if( funcCandidates.size() > 1 ) { |
---|
[ef5b828] | 1907 | SemanticErrorException top( stmt->location, |
---|
[2773ab8] | 1908 | "Ambiguous function in call to waitfor" ); |
---|
| 1909 | top.append( errors ); |
---|
| 1910 | throw top; |
---|
| 1911 | } |
---|
| 1912 | if( argsCandidates.size() > 1 ) { |
---|
| 1913 | SemanticErrorException top( stmt->location, |
---|
| 1914 | "Ambiguous arguments in call to waitfor" ); |
---|
| 1915 | top.append( errors ); |
---|
| 1916 | throw top; |
---|
| 1917 | } |
---|
| 1918 | // TODO: need to use findDeletedExpr to ensure no deleted identifiers are used. |
---|
| 1919 | |
---|
| 1920 | // build new clause |
---|
[f6e6a55] | 1921 | auto clause2 = new ast::WaitForClause( clause.location ); |
---|
[ef5b828] | 1922 | |
---|
[c86b08d] | 1923 | clause2->target = funcCandidates.front()->expr; |
---|
[ef5b828] | 1924 | |
---|
[f6e6a55] | 1925 | clause2->target_args.reserve( clause.target_args.size() ); |
---|
[6668a3e] | 1926 | const ast::StructDecl * decl_monitor = symtab.lookupStruct( "monitor$" ); |
---|
[2773ab8] | 1927 | for ( auto arg : argsCandidates.front() ) { |
---|
[6668a3e] | 1928 | const auto & loc = stmt->location; |
---|
| 1929 | |
---|
| 1930 | ast::Expr * init = new ast::CastExpr( loc, |
---|
| 1931 | new ast::UntypedExpr( loc, |
---|
| 1932 | new ast::NameExpr( loc, "get_monitor" ), |
---|
| 1933 | { arg->expr } |
---|
| 1934 | ), |
---|
| 1935 | new ast::PointerType( |
---|
| 1936 | new ast::StructInstType( |
---|
| 1937 | decl_monitor |
---|
| 1938 | ) |
---|
| 1939 | ) |
---|
| 1940 | ); |
---|
| 1941 | |
---|
[f6e6a55] | 1942 | clause2->target_args.emplace_back( findSingleExpression( init, context ) ); |
---|
[2773ab8] | 1943 | } |
---|
| 1944 | |
---|
| 1945 | // Resolve the conditions as if it were an IfStmt, statements normally |
---|
[c86b08d] | 1946 | clause2->when_cond = findSingleExpression( clause.when_cond, context ); |
---|
[f6e6a55] | 1947 | clause2->stmt = clause.stmt->accept( *visitor ); |
---|
[2773ab8] | 1948 | |
---|
| 1949 | // set results into stmt |
---|
| 1950 | auto n = mutate( stmt ); |
---|
[f6e6a55] | 1951 | n->clauses[i] = clause2; |
---|
[2773ab8] | 1952 | stmt = n; |
---|
| 1953 | } |
---|
| 1954 | |
---|
[f6e6a55] | 1955 | if ( stmt->timeout_stmt ) { |
---|
[2773ab8] | 1956 | // resolve the timeout as a size_t, the conditions like IfStmt, and stmts normally |
---|
[ef5b828] | 1957 | ast::ptr< ast::Type > target = |
---|
[2773ab8] | 1958 | new ast::BasicType{ ast::BasicType::LongLongUnsignedInt }; |
---|
[f6e6a55] | 1959 | auto timeout_time = findSingleExpression( stmt->timeout_time, target, context ); |
---|
| 1960 | auto timeout_cond = findSingleExpression( stmt->timeout_cond, context ); |
---|
| 1961 | auto timeout_stmt = stmt->timeout_stmt->accept( *visitor ); |
---|
[2773ab8] | 1962 | |
---|
| 1963 | // set results into stmt |
---|
| 1964 | auto n = mutate( stmt ); |
---|
[f6e6a55] | 1965 | n->timeout_time = std::move( timeout_time ); |
---|
| 1966 | n->timeout_cond = std::move( timeout_cond ); |
---|
| 1967 | n->timeout_stmt = std::move( timeout_stmt ); |
---|
[2773ab8] | 1968 | stmt = n; |
---|
| 1969 | } |
---|
| 1970 | |
---|
[f6e6a55] | 1971 | if ( stmt->else_stmt ) { |
---|
[2773ab8] | 1972 | // resolve the condition like IfStmt, stmts normally |
---|
[f6e6a55] | 1973 | auto else_cond = findSingleExpression( stmt->else_cond, context ); |
---|
| 1974 | auto else_stmt = stmt->else_stmt->accept( *visitor ); |
---|
[2773ab8] | 1975 | |
---|
| 1976 | // set results into stmt |
---|
| 1977 | auto n = mutate( stmt ); |
---|
[f6e6a55] | 1978 | n->else_cond = std::move( else_cond ); |
---|
| 1979 | n->else_stmt = std::move( else_stmt ); |
---|
[2773ab8] | 1980 | stmt = n; |
---|
| 1981 | } |
---|
| 1982 | |
---|
| 1983 | return stmt; |
---|
[d76c588] | 1984 | } |
---|
| 1985 | |
---|
[16ba4a6f] | 1986 | const ast::WithStmt * Resolver_new::previsit( const ast::WithStmt * withStmt ) { |
---|
| 1987 | auto mutStmt = mutate(withStmt); |
---|
| 1988 | resolveWithExprs(mutStmt->exprs, stmtsToAddBefore); |
---|
| 1989 | return mutStmt; |
---|
| 1990 | } |
---|
| 1991 | |
---|
| 1992 | void Resolver_new::resolveWithExprs(std::vector<ast::ptr<ast::Expr>> & exprs, std::list<ast::ptr<ast::Stmt>> & stmtsToAdd) { |
---|
| 1993 | for (auto & expr : exprs) { |
---|
| 1994 | // only struct- and union-typed expressions are viable candidates |
---|
[3bc69f2] | 1995 | expr = findKindExpression( expr, context, structOrUnion, "with expression" ); |
---|
[16ba4a6f] | 1996 | |
---|
| 1997 | // if with expression might be impure, create a temporary so that it is evaluated once |
---|
| 1998 | if ( Tuples::maybeImpure( expr ) ) { |
---|
| 1999 | static UniqueName tmpNamer( "_with_tmp_" ); |
---|
| 2000 | const CodeLocation loc = expr->location; |
---|
| 2001 | auto tmp = new ast::ObjectDecl(loc, tmpNamer.newName(), expr->result, new ast::SingleInit(loc, expr ) ); |
---|
| 2002 | expr = new ast::VariableExpr( loc, tmp ); |
---|
| 2003 | stmtsToAdd.push_back( new ast::DeclStmt(loc, tmp ) ); |
---|
| 2004 | if ( InitTweak::isConstructable( tmp->type ) ) { |
---|
| 2005 | // generate ctor/dtor and resolve them |
---|
| 2006 | tmp->init = InitTweak::genCtorInit( loc, tmp ); |
---|
| 2007 | } |
---|
| 2008 | // since tmp is freshly created, this should modify tmp in-place |
---|
| 2009 | tmp->accept( *visitor ); |
---|
| 2010 | } |
---|
[9e23b446] | 2011 | else if (expr->env && expr->env->empty()) { |
---|
| 2012 | expr = ast::mutate_field(expr.get(), &ast::Expr::env, nullptr); |
---|
| 2013 | } |
---|
[16ba4a6f] | 2014 | } |
---|
| 2015 | } |
---|
[60aaa51d] | 2016 | |
---|
| 2017 | |
---|
| 2018 | const ast::SingleInit * Resolver_new::previsit( const ast::SingleInit * singleInit ) { |
---|
| 2019 | visit_children = false; |
---|
[ef5b828] | 2020 | // resolve initialization using the possibilities as determined by the `currentObject` |
---|
[60aaa51d] | 2021 | // cursor. |
---|
[ef5b828] | 2022 | ast::ptr< ast::Expr > untyped = new ast::UntypedInitExpr{ |
---|
[60aaa51d] | 2023 | singleInit->location, singleInit->value, currentObject.getOptions() }; |
---|
[3bc69f2] | 2024 | ast::ptr<ast::Expr> newExpr = findSingleExpression( untyped, context ); |
---|
[60aaa51d] | 2025 | const ast::InitExpr * initExpr = newExpr.strict_as< ast::InitExpr >(); |
---|
| 2026 | |
---|
| 2027 | // move cursor to the object that is actually initialized |
---|
| 2028 | currentObject.setNext( initExpr->designation ); |
---|
| 2029 | |
---|
| 2030 | // discard InitExpr wrapper and retain relevant pieces. |
---|
[ef5b828] | 2031 | // `initExpr` may have inferred params in the case where the expression specialized a |
---|
| 2032 | // function pointer, and newExpr may already have inferParams of its own, so a simple |
---|
[60aaa51d] | 2033 | // swap is not sufficient |
---|
| 2034 | ast::Expr::InferUnion inferred = initExpr->inferred; |
---|
| 2035 | swap_and_save_env( newExpr, initExpr->expr ); |
---|
| 2036 | newExpr.get_and_mutate()->inferred.splice( std::move(inferred) ); |
---|
| 2037 | |
---|
[ef5b828] | 2038 | // get the actual object's type (may not exactly match what comes back from the resolver |
---|
[60aaa51d] | 2039 | // due to conversions) |
---|
| 2040 | const ast::Type * initContext = currentObject.getCurrentType(); |
---|
| 2041 | |
---|
| 2042 | removeExtraneousCast( newExpr, symtab ); |
---|
| 2043 | |
---|
| 2044 | // check if actual object's type is char[] |
---|
| 2045 | if ( auto at = dynamic_cast< const ast::ArrayType * >( initContext ) ) { |
---|
| 2046 | if ( isCharType( at->base ) ) { |
---|
| 2047 | // check if the resolved type is char* |
---|
| 2048 | if ( auto pt = newExpr->result.as< ast::PointerType >() ) { |
---|
| 2049 | if ( isCharType( pt->base ) ) { |
---|
[ef5b828] | 2050 | // strip cast if we're initializing a char[] with a char* |
---|
[60aaa51d] | 2051 | // e.g. char x[] = "hello" |
---|
| 2052 | if ( auto ce = newExpr.as< ast::CastExpr >() ) { |
---|
| 2053 | swap_and_save_env( newExpr, ce->arg ); |
---|
| 2054 | } |
---|
| 2055 | } |
---|
| 2056 | } |
---|
| 2057 | } |
---|
| 2058 | } |
---|
| 2059 | |
---|
| 2060 | // move cursor to next object in preparation for next initializer |
---|
| 2061 | currentObject.increment(); |
---|
| 2062 | |
---|
| 2063 | // set initializer expression to resolved expression |
---|
| 2064 | return ast::mutate_field( singleInit, &ast::SingleInit::value, std::move(newExpr) ); |
---|
[d76c588] | 2065 | } |
---|
| 2066 | |
---|
[60aaa51d] | 2067 | const ast::ListInit * Resolver_new::previsit( const ast::ListInit * listInit ) { |
---|
| 2068 | // move cursor into brace-enclosed initializer-list |
---|
| 2069 | currentObject.enterListInit( listInit->location ); |
---|
| 2070 | |
---|
| 2071 | assert( listInit->designations.size() == listInit->initializers.size() ); |
---|
| 2072 | for ( unsigned i = 0; i < listInit->designations.size(); ++i ) { |
---|
[ef5b828] | 2073 | // iterate designations and initializers in pairs, moving the cursor to the current |
---|
[60aaa51d] | 2074 | // designated object and resolving the initializer against that object |
---|
[2d11663] | 2075 | listInit = ast::mutate_field_index( |
---|
[ef5b828] | 2076 | listInit, &ast::ListInit::designations, i, |
---|
[2d11663] | 2077 | currentObject.findNext( listInit->designations[i] ) ); |
---|
| 2078 | listInit = ast::mutate_field_index( |
---|
| 2079 | listInit, &ast::ListInit::initializers, i, |
---|
| 2080 | listInit->initializers[i]->accept( *visitor ) ); |
---|
[60aaa51d] | 2081 | } |
---|
| 2082 | |
---|
[2d11663] | 2083 | // move cursor out of brace-enclosed initializer-list |
---|
| 2084 | currentObject.exitListInit(); |
---|
| 2085 | |
---|
[60aaa51d] | 2086 | visit_children = false; |
---|
| 2087 | return listInit; |
---|
[d76c588] | 2088 | } |
---|
| 2089 | |
---|
[2d11663] | 2090 | const ast::ConstructorInit * Resolver_new::previsit( const ast::ConstructorInit * ctorInit ) { |
---|
| 2091 | visitor->maybe_accept( ctorInit, &ast::ConstructorInit::ctor ); |
---|
| 2092 | visitor->maybe_accept( ctorInit, &ast::ConstructorInit::dtor ); |
---|
| 2093 | |
---|
| 2094 | // found a constructor - can get rid of C-style initializer |
---|
| 2095 | // xxx - Rob suggests this field is dead code |
---|
| 2096 | ctorInit = ast::mutate_field( ctorInit, &ast::ConstructorInit::init, nullptr ); |
---|
| 2097 | |
---|
[ef5b828] | 2098 | // intrinsic single-parameter constructors and destructors do nothing. Since this was |
---|
| 2099 | // implicitly generated, there's no way for it to have side effects, so get rid of it to |
---|
[2d11663] | 2100 | // clean up generated code |
---|
| 2101 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->ctor ) ) { |
---|
| 2102 | ctorInit = ast::mutate_field( ctorInit, &ast::ConstructorInit::ctor, nullptr ); |
---|
| 2103 | } |
---|
| 2104 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->dtor ) ) { |
---|
| 2105 | ctorInit = ast::mutate_field( ctorInit, &ast::ConstructorInit::dtor, nullptr ); |
---|
| 2106 | } |
---|
| 2107 | |
---|
| 2108 | return ctorInit; |
---|
[d76c588] | 2109 | } |
---|
| 2110 | |
---|
[0dd9a5e] | 2111 | // suppress error on autogen functions and mark invalid autogen as deleted. |
---|
[e00c22f] | 2112 | bool Resolver_new::on_error(ast::ptr<ast::Decl> & decl) { |
---|
[0dd9a5e] | 2113 | if (auto functionDecl = decl.as<ast::FunctionDecl>()) { |
---|
| 2114 | // xxx - can intrinsic gen ever fail? |
---|
[6668a3e] | 2115 | if (functionDecl->linkage == ast::Linkage::AutoGen) { |
---|
[0dd9a5e] | 2116 | auto mutDecl = mutate(functionDecl); |
---|
| 2117 | mutDecl->isDeleted = true; |
---|
| 2118 | mutDecl->stmts = nullptr; |
---|
| 2119 | decl = mutDecl; |
---|
| 2120 | return false; |
---|
| 2121 | } |
---|
| 2122 | } |
---|
| 2123 | return true; |
---|
| 2124 | } |
---|
| 2125 | |
---|
[51b7345] | 2126 | } // namespace ResolvExpr |
---|
[a32b204] | 2127 | |
---|
| 2128 | // Local Variables: // |
---|
| 2129 | // tab-width: 4 // |
---|
| 2130 | // mode: c++ // |
---|
| 2131 | // compile-command: "make install" // |
---|
| 2132 | // End: // |
---|