[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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[4c2fe47] | 11 | // Last Modified By : Peter A. Buhr |
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[ca9d65e] | 12 | // Last Modified On : Thu Dec 14 18:44:43 2023 |
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| 13 | // Update Count : 251 |
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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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[99d4584] | 21 | #include "Candidate.hpp" |
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| 22 | #include "CandidateFinder.hpp" |
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[d76c588] | 23 | #include "CurrentObject.h" // for CurrentObject |
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| 24 | #include "RenameVars.h" // for RenameVars, global_renamer |
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| 25 | #include "Resolver.h" |
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[16ba4a6] | 26 | #include "ResolveTypeof.h" |
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[4a89b52] | 27 | #include "ResolveMode.hpp" // for ResolveMode |
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[d76c588] | 28 | #include "typeops.h" // for extractResultType |
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| 29 | #include "Unify.h" // for unify |
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[16ba4a6] | 30 | #include "CompilationState.h" |
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[2a8f0c1] | 31 | #include "AST/Decl.hpp" |
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| 32 | #include "AST/Init.hpp" |
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[d76c588] | 33 | #include "AST/Pass.hpp" |
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[99d4584] | 34 | #include "AST/Print.hpp" |
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[d76c588] | 35 | #include "AST/SymbolTable.hpp" |
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[2773ab8] | 36 | #include "AST/Type.hpp" |
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[8f06277] | 37 | #include "Common/Eval.h" // for eval |
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[9feb34b] | 38 | #include "Common/Iterate.hpp" // for group_iterate |
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[ea6332d] | 39 | #include "Common/SemanticError.h" // for SemanticError |
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[57e0289] | 40 | #include "Common/Stats/ResolveTime.h" // for ResolveTime::start(), ResolveTime::stop() |
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[9feb34b] | 41 | #include "Common/ToString.hpp" // for toCString |
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[c6b4432] | 42 | #include "Common/UniqueName.h" // for UniqueName |
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[0a60c04] | 43 | #include "InitTweak/GenInit.h" |
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[ea6332d] | 44 | #include "InitTweak/InitTweak.h" // for isIntrinsicSingleArgCallStmt |
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[16ba4a6] | 45 | #include "SymTab/Mangler.h" // for Mangler |
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[0a60c04] | 46 | #include "Tuples/Tuples.h" |
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[2bfc6b2] | 47 | #include "Validate/FindSpecialDecls.h" // for SizeType |
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[51b7345] | 48 | |
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[d9a0e76] | 49 | using namespace std; |
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[51b7345] | 50 | |
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[d9a0e76] | 51 | namespace ResolvExpr { |
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[1dcd9554] | 52 | template< typename iterator_t > |
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| 53 | inline bool advance_to_mutex( iterator_t & it, const iterator_t & end ) { |
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| 54 | while( it != end && !(*it)->get_type()->get_mutex() ) { |
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| 55 | it++; |
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| 56 | } |
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| 57 | |
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| 58 | return it != end; |
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| 59 | } |
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| 60 | |
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[99d4584] | 61 | namespace { |
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| 62 | /// Finds deleted expressions in an expression tree |
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[0bd3faf] | 63 | struct DeleteFinder final : public ast::WithShortCircuiting, public ast::WithVisitorRef<DeleteFinder> { |
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[e6b42e7] | 64 | const ast::DeletedExpr * result = nullptr; |
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[99d4584] | 65 | |
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| 66 | void previsit( const ast::DeletedExpr * expr ) { |
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[e6b42e7] | 67 | if ( result ) { visit_children = false; } |
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| 68 | else { result = expr; } |
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[99d4584] | 69 | } |
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| 70 | |
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[361bf01] | 71 | void previsit( const ast::Expr * expr ) { |
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[e6b42e7] | 72 | if ( result ) { visit_children = false; } |
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[361bf01] | 73 | if (expr->inferred.hasParams()) { |
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| 74 | for (auto & imp : expr->inferred.inferParams() ) { |
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[2dda05d] | 75 | imp.second.expr->accept(*visitor); |
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[361bf01] | 76 | } |
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| 77 | } |
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[99d4584] | 78 | } |
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| 79 | }; |
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[4894239] | 80 | |
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[0bd3faf] | 81 | struct ResolveDesignators final : public ast::WithShortCircuiting { |
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[4894239] | 82 | ResolveContext& context; |
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| 83 | bool result = false; |
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| 84 | |
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[0bd3faf] | 85 | ResolveDesignators( ResolveContext& _context ): context{_context} {}; |
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[4894239] | 86 | |
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| 87 | void previsit( const ast::Node * ) { |
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| 88 | // short circuit if we already know there are designations |
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| 89 | if ( result ) visit_children = false; |
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| 90 | } |
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| 91 | |
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| 92 | void previsit( const ast::Designation * des ) { |
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| 93 | if ( result ) visit_children = false; |
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| 94 | else if ( ! des->designators.empty() ) { |
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| 95 | if ( (des->designators.size() == 1) ) { |
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| 96 | const ast::Expr * designator = des->designators.at(0); |
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| 97 | if ( const ast::NameExpr * designatorName = dynamic_cast<const ast::NameExpr *>(designator) ) { |
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| 98 | auto candidates = context.symtab.lookupId(designatorName->name); |
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| 99 | for ( auto candidate : candidates ) { |
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| 100 | if ( dynamic_cast<const ast::EnumInstType *>(candidate.id->get_type()) ) { |
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| 101 | result = true; |
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| 102 | break; |
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| 103 | } |
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| 104 | } |
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[2345ab3] | 105 | } |
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| 106 | } |
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[4894239] | 107 | visit_children = false; |
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| 108 | } |
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| 109 | } |
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| 110 | }; |
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[d57e349] | 111 | } // anonymous namespace |
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| 112 | /// Check if this expression is or includes a deleted expression |
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| 113 | const ast::DeletedExpr * findDeletedExpr( const ast::Expr * expr ) { |
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[0bd3faf] | 114 | return ast::Pass<DeleteFinder>::read( expr ); |
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[d57e349] | 115 | } |
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[99d4584] | 116 | |
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[d57e349] | 117 | namespace { |
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[b7d92b96] | 118 | /// always-accept candidate filter |
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| 119 | bool anyCandidate( const Candidate & ) { return true; } |
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| 120 | |
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[99d4584] | 121 | /// Calls the CandidateFinder and finds the single best candidate |
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| 122 | CandidateRef findUnfinishedKindExpression( |
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[39d8950] | 123 | const ast::Expr * untyped, const ResolveContext & context, const std::string & kind, |
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[4a89b52] | 124 | std::function<bool(const Candidate &)> pred = anyCandidate, ResolveMode mode = {} |
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[99d4584] | 125 | ) { |
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| 126 | if ( ! untyped ) return nullptr; |
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| 127 | |
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| 128 | // xxx - this isn't thread-safe, but should work until we parallelize the resolver |
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| 129 | static unsigned recursion_level = 0; |
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| 130 | |
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| 131 | ++recursion_level; |
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| 132 | ast::TypeEnvironment env; |
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[39d8950] | 133 | CandidateFinder finder( context, env ); |
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[46da46b] | 134 | finder.allowVoid = true; |
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[99d4584] | 135 | finder.find( untyped, recursion_level == 1 ? mode.atTopLevel() : mode ); |
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| 136 | --recursion_level; |
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| 137 | |
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| 138 | // produce a filtered list of candidates |
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| 139 | CandidateList candidates; |
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| 140 | for ( auto & cand : finder.candidates ) { |
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| 141 | if ( pred( *cand ) ) { candidates.emplace_back( cand ); } |
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| 142 | } |
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| 143 | |
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| 144 | // produce invalid error if no candidates |
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| 145 | if ( candidates.empty() ) { |
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[ef5b828] | 146 | SemanticError( untyped, |
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| 147 | toString( "No reasonable alternatives for ", kind, (kind != "" ? " " : ""), |
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[99d4584] | 148 | "expression: ") ); |
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| 149 | } |
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| 150 | |
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| 151 | // search for cheapest candidate |
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| 152 | CandidateList winners; |
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| 153 | bool seen_undeleted = false; |
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| 154 | for ( CandidateRef & cand : candidates ) { |
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| 155 | int c = winners.empty() ? -1 : cand->cost.compare( winners.front()->cost ); |
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| 156 | |
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| 157 | if ( c > 0 ) continue; // skip more expensive than winner |
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| 158 | |
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| 159 | if ( c < 0 ) { |
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| 160 | // reset on new cheapest |
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| 161 | seen_undeleted = ! findDeletedExpr( cand->expr ); |
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| 162 | winners.clear(); |
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| 163 | } else /* if ( c == 0 ) */ { |
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| 164 | if ( findDeletedExpr( cand->expr ) ) { |
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| 165 | // skip deleted expression if already seen one equivalent-cost not |
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| 166 | if ( seen_undeleted ) continue; |
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| 167 | } else if ( ! seen_undeleted ) { |
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| 168 | // replace list of equivalent-cost deleted expressions with one non-deleted |
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| 169 | winners.clear(); |
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| 170 | seen_undeleted = true; |
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| 171 | } |
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| 172 | } |
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| 173 | |
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| 174 | winners.emplace_back( std::move( cand ) ); |
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| 175 | } |
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| 176 | |
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| 177 | // promote candidate.cvtCost to .cost |
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[46da46b] | 178 | // promoteCvtCost( winners ); |
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[99d4584] | 179 | |
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| 180 | // produce ambiguous errors, if applicable |
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| 181 | if ( winners.size() != 1 ) { |
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| 182 | std::ostringstream stream; |
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[ef5b828] | 183 | stream << "Cannot choose between " << winners.size() << " alternatives for " |
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[99d4584] | 184 | << kind << (kind != "" ? " " : "") << "expression\n"; |
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| 185 | ast::print( stream, untyped ); |
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| 186 | stream << " Alternatives are:\n"; |
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| 187 | print( stream, winners, 1 ); |
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| 188 | SemanticError( untyped->location, stream.str() ); |
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| 189 | } |
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| 190 | |
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| 191 | // single selected choice |
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| 192 | CandidateRef & choice = winners.front(); |
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| 193 | |
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| 194 | // fail on only expression deleted |
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| 195 | if ( ! seen_undeleted ) { |
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| 196 | SemanticError( untyped->location, choice->expr.get(), "Unique best alternative " |
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| 197 | "includes deleted identifier in " ); |
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| 198 | } |
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| 199 | |
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| 200 | return std::move( choice ); |
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| 201 | } |
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| 202 | |
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| 203 | /// Strips extraneous casts out of an expression |
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[0bd3faf] | 204 | struct StripCasts final { |
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[c408483] | 205 | const ast::Expr * postvisit( const ast::CastExpr * castExpr ) { |
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[ef5b828] | 206 | if ( |
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[2890212] | 207 | castExpr->isGenerated == ast::GeneratedCast |
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[ef5b828] | 208 | && typesCompatible( castExpr->arg->result, castExpr->result ) |
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[99d4584] | 209 | ) { |
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| 210 | // generated cast is the same type as its argument, remove it after keeping env |
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[ef5b828] | 211 | return ast::mutate_field( |
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[b7d92b96] | 212 | castExpr->arg.get(), &ast::Expr::env, castExpr->env ); |
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[99d4584] | 213 | } |
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| 214 | return castExpr; |
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| 215 | } |
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| 216 | |
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| 217 | static void strip( ast::ptr< ast::Expr > & expr ) { |
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[0bd3faf] | 218 | ast::Pass< StripCasts > stripper; |
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[99d4584] | 219 | expr = expr->accept( stripper ); |
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| 220 | } |
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| 221 | }; |
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| 222 | |
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[60aaa51d] | 223 | /// Swaps argument into expression pointer, saving original environment |
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| 224 | void swap_and_save_env( ast::ptr< ast::Expr > & expr, const ast::Expr * newExpr ) { |
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| 225 | ast::ptr< ast::TypeSubstitution > env = expr->env; |
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| 226 | expr.set_and_mutate( newExpr )->env = env; |
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| 227 | } |
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| 228 | |
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[b7d92b96] | 229 | /// Removes cast to type of argument (unlike StripCasts, also handles non-generated casts) |
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[918e4165] | 230 | void removeExtraneousCast( ast::ptr<ast::Expr> & expr ) { |
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[b7d92b96] | 231 | if ( const ast::CastExpr * castExpr = expr.as< ast::CastExpr >() ) { |
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[251ce80] | 232 | if ( typesCompatible( castExpr->arg->result, castExpr->result ) ) { |
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[b7d92b96] | 233 | // cast is to the same type as its argument, remove it |
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[60aaa51d] | 234 | swap_and_save_env( expr, castExpr->arg ); |
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[b7d92b96] | 235 | } |
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| 236 | } |
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| 237 | } |
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| 238 | |
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[6668a3e] | 239 | |
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[490fb92e] | 240 | } // anonymous namespace |
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| 241 | /// Establish post-resolver invariants for expressions |
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[ef5b828] | 242 | void finishExpr( |
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| 243 | ast::ptr< ast::Expr > & expr, const ast::TypeEnvironment & env, |
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[99d4584] | 244 | const ast::TypeSubstitution * oldenv = nullptr |
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| 245 | ) { |
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| 246 | // set up new type substitution for expression |
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[ef5b828] | 247 | ast::ptr< ast::TypeSubstitution > newenv = |
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[99d4584] | 248 | oldenv ? oldenv : new ast::TypeSubstitution{}; |
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| 249 | env.writeToSubstitution( *newenv.get_and_mutate() ); |
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| 250 | expr.get_and_mutate()->env = std::move( newenv ); |
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| 251 | // remove unncecessary casts |
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[0bd3faf] | 252 | StripCasts::strip( expr ); |
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[99d4584] | 253 | } |
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[ef5b828] | 254 | |
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[4b7cce6] | 255 | ast::ptr< ast::Expr > resolveInVoidContext( |
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[39d8950] | 256 | const ast::Expr * expr, const ResolveContext & context, |
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| 257 | ast::TypeEnvironment & env |
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[4b7cce6] | 258 | ) { |
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| 259 | assertf( expr, "expected a non-null expression" ); |
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[ef5b828] | 260 | |
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[4b7cce6] | 261 | // set up and resolve expression cast to void |
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[417117e] | 262 | ast::ptr< ast::CastExpr > untyped = new ast::CastExpr{ expr }; |
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[ef5b828] | 263 | CandidateRef choice = findUnfinishedKindExpression( |
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[4a89b52] | 264 | untyped, context, "", anyCandidate, ResolveMode::withAdjustment() ); |
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[ef5b828] | 265 | |
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[4b7cce6] | 266 | // a cast expression has either 0 or 1 interpretations (by language rules); |
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| 267 | // if 0, an exception has already been thrown, and this code will not run |
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| 268 | const ast::CastExpr * castExpr = choice->expr.strict_as< ast::CastExpr >(); |
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| 269 | env = std::move( choice->env ); |
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| 270 | |
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| 271 | return castExpr->arg; |
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| 272 | } |
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[b7d92b96] | 273 | |
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[490fb92e] | 274 | /// Resolve `untyped` to the expression whose candidate is the best match for a `void` |
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[b7d92b96] | 275 | /// context. |
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[ef5b828] | 276 | ast::ptr< ast::Expr > findVoidExpression( |
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[39d8950] | 277 | const ast::Expr * untyped, const ResolveContext & context |
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[b7d92b96] | 278 | ) { |
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| 279 | ast::TypeEnvironment env; |
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[39d8950] | 280 | ast::ptr< ast::Expr > newExpr = resolveInVoidContext( untyped, context, env ); |
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[b7d92b96] | 281 | finishExpr( newExpr, env, untyped->env ); |
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| 282 | return newExpr; |
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| 283 | } |
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| 284 | |
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[490fb92e] | 285 | namespace { |
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[6668a3e] | 286 | |
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[490fb92e] | 287 | |
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[ef5b828] | 288 | /// resolve `untyped` to the expression whose candidate satisfies `pred` with the |
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[99d4584] | 289 | /// lowest cost, returning the resolved version |
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| 290 | ast::ptr< ast::Expr > findKindExpression( |
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[39d8950] | 291 | const ast::Expr * untyped, const ResolveContext & context, |
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[ef5b828] | 292 | std::function<bool(const Candidate &)> pred = anyCandidate, |
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[4a89b52] | 293 | const std::string & kind = "", ResolveMode mode = {} |
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[99d4584] | 294 | ) { |
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| 295 | if ( ! untyped ) return {}; |
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[ef5b828] | 296 | CandidateRef choice = |
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[39d8950] | 297 | findUnfinishedKindExpression( untyped, context, kind, pred, mode ); |
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[490fb92e] | 298 | ResolvExpr::finishExpr( choice->expr, choice->env, untyped->env ); |
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[99d4584] | 299 | return std::move( choice->expr ); |
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| 300 | } |
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| 301 | |
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[2773ab8] | 302 | /// Resolve `untyped` to the single expression whose candidate is the best match |
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[ef5b828] | 303 | ast::ptr< ast::Expr > findSingleExpression( |
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[39d8950] | 304 | const ast::Expr * untyped, const ResolveContext & context |
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[2773ab8] | 305 | ) { |
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[57e0289] | 306 | Stats::ResolveTime::start( untyped ); |
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[39d8950] | 307 | auto res = findKindExpression( untyped, context ); |
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[57e0289] | 308 | Stats::ResolveTime::stop(); |
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| 309 | return res; |
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[2773ab8] | 310 | } |
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[18e683b] | 311 | } // anonymous namespace |
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[2773ab8] | 312 | |
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[16ba4a6] | 313 | ast::ptr< ast::Expr > findSingleExpression( |
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[39d8950] | 314 | const ast::Expr * untyped, const ast::Type * type, |
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| 315 | const ResolveContext & context |
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[16ba4a6] | 316 | ) { |
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| 317 | assert( untyped && type ); |
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| 318 | ast::ptr< ast::Expr > castExpr = new ast::CastExpr{ untyped, type }; |
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[39d8950] | 319 | ast::ptr< ast::Expr > newExpr = findSingleExpression( castExpr, context ); |
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[918e4165] | 320 | removeExtraneousCast( newExpr ); |
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[16ba4a6] | 321 | return newExpr; |
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| 322 | } |
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[b7d92b96] | 323 | |
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[18e683b] | 324 | namespace { |
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[16ba4a6] | 325 | bool structOrUnion( const Candidate & i ) { |
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| 326 | const ast::Type * t = i.expr->result->stripReferences(); |
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| 327 | return dynamic_cast< const ast::StructInstType * >( t ) || dynamic_cast< const ast::UnionInstType * >( t ); |
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| 328 | } |
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[99d4584] | 329 | /// Predicate for "Candidate has integral type" |
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| 330 | bool hasIntegralType( const Candidate & i ) { |
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| 331 | const ast::Type * type = i.expr->result; |
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[ef5b828] | 332 | |
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[99d4584] | 333 | if ( auto bt = dynamic_cast< const ast::BasicType * >( type ) ) { |
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| 334 | return bt->isInteger(); |
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[ef5b828] | 335 | } else if ( |
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| 336 | dynamic_cast< const ast::EnumInstType * >( type ) |
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[99d4584] | 337 | || dynamic_cast< const ast::ZeroType * >( type ) |
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| 338 | || dynamic_cast< const ast::OneType * >( type ) |
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| 339 | ) { |
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| 340 | return true; |
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| 341 | } else return false; |
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| 342 | } |
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| 343 | |
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| 344 | /// Resolve `untyped` as an integral expression, returning the resolved version |
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[ef5b828] | 345 | ast::ptr< ast::Expr > findIntegralExpression( |
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[39d8950] | 346 | const ast::Expr * untyped, const ResolveContext & context |
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[99d4584] | 347 | ) { |
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[39d8950] | 348 | return findKindExpression( untyped, context, hasIntegralType, "condition" ); |
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[99d4584] | 349 | } |
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[60aaa51d] | 350 | |
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| 351 | /// check if a type is a character type |
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| 352 | bool isCharType( const ast::Type * t ) { |
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| 353 | if ( auto bt = dynamic_cast< const ast::BasicType * >( t ) ) { |
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[ef5b828] | 354 | return bt->kind == ast::BasicType::Char |
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| 355 | || bt->kind == ast::BasicType::SignedChar |
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[60aaa51d] | 356 | || bt->kind == ast::BasicType::UnsignedChar; |
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| 357 | } |
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| 358 | return false; |
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| 359 | } |
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[2773ab8] | 360 | |
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| 361 | /// Advance a type itertor to the next mutex parameter |
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| 362 | template<typename Iter> |
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| 363 | inline bool nextMutex( Iter & it, const Iter & end ) { |
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[954c954] | 364 | while ( it != end && ! (*it)->is_mutex() ) { ++it; } |
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[2773ab8] | 365 | return it != end; |
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| 366 | } |
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[99d4584] | 367 | } |
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| 368 | |
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[0bd3faf] | 369 | class Resolver final |
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[4864a73] | 370 | : public ast::WithSymbolTable, public ast::WithGuards, |
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[0bd3faf] | 371 | public ast::WithVisitorRef<Resolver>, public ast::WithShortCircuiting, |
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[0e42794] | 372 | public ast::WithStmtsToAdd<> { |
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[4864a73] | 373 | |
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[2a8f0c1] | 374 | ast::ptr< ast::Type > functionReturn = nullptr; |
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[2b59f55] | 375 | ast::CurrentObject currentObject; |
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[16ba4a6] | 376 | // for work previously in GenInit |
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[0bd3faf] | 377 | static InitTweak::ManagedTypes managedTypes; |
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[3bc69f2] | 378 | ResolveContext context; |
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[16ba4a6] | 379 | |
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[99d4584] | 380 | bool inEnumDecl = false; |
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[2a8f0c1] | 381 | |
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[4864a73] | 382 | public: |
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[c15085d] | 383 | static size_t traceId; |
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[0bd3faf] | 384 | Resolver( const ast::TranslationGlobal & global ) : |
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[b9fe89b] | 385 | ast::WithSymbolTable(ast::SymbolTable::ErrorDetection::ValidateOnAdd), |
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[3bc69f2] | 386 | context{ symtab, global } {} |
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[0bd3faf] | 387 | Resolver( const ResolveContext & context ) : |
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[3bc69f2] | 388 | ast::WithSymbolTable{ context.symtab }, |
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| 389 | context{ symtab, context.global } {} |
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[d76c588] | 390 | |
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[16ba4a6] | 391 | const ast::FunctionDecl * previsit( const ast::FunctionDecl * ); |
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[99d4584] | 392 | const ast::FunctionDecl * postvisit( const ast::FunctionDecl * ); |
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[16ba4a6] | 393 | const ast::ObjectDecl * previsit( const ast::ObjectDecl * ); |
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| 394 | void previsit( const ast::AggregateDecl * ); |
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| 395 | void previsit( const ast::StructDecl * ); |
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[99d4584] | 396 | void previsit( const ast::EnumDecl * ); |
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| 397 | const ast::StaticAssertDecl * previsit( const ast::StaticAssertDecl * ); |
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| 398 | |
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[0f6a7752] | 399 | const ast::ArrayType * previsit( const ast::ArrayType * ); |
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| 400 | const ast::PointerType * previsit( const ast::PointerType * ); |
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[99d4584] | 401 | |
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[2773ab8] | 402 | const ast::ExprStmt * previsit( const ast::ExprStmt * ); |
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| 403 | const ast::AsmExpr * previsit( const ast::AsmExpr * ); |
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| 404 | const ast::AsmStmt * previsit( const ast::AsmStmt * ); |
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| 405 | const ast::IfStmt * previsit( const ast::IfStmt * ); |
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[3bc69f2] | 406 | const ast::WhileDoStmt * previsit( const ast::WhileDoStmt * ); |
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[2773ab8] | 407 | const ast::ForStmt * previsit( const ast::ForStmt * ); |
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| 408 | const ast::SwitchStmt * previsit( const ast::SwitchStmt * ); |
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[400b8be] | 409 | const ast::CaseClause * previsit( const ast::CaseClause * ); |
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[2773ab8] | 410 | const ast::BranchStmt * previsit( const ast::BranchStmt * ); |
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| 411 | const ast::ReturnStmt * previsit( const ast::ReturnStmt * ); |
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| 412 | const ast::ThrowStmt * previsit( const ast::ThrowStmt * ); |
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[400b8be] | 413 | const ast::CatchClause * previsit( const ast::CatchClause * ); |
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| 414 | const ast::CatchClause * postvisit( const ast::CatchClause * ); |
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[2773ab8] | 415 | const ast::WaitForStmt * previsit( const ast::WaitForStmt * ); |
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[16ba4a6] | 416 | const ast::WithStmt * previsit( const ast::WithStmt * ); |
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[99d4584] | 417 | |
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[2d11663] | 418 | const ast::SingleInit * previsit( const ast::SingleInit * ); |
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| 419 | const ast::ListInit * previsit( const ast::ListInit * ); |
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| 420 | const ast::ConstructorInit * previsit( const ast::ConstructorInit * ); |
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[16ba4a6] | 421 | |
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[59c8dff] | 422 | const ast::EnumPosExpr * previsit( const ast::EnumPosExpr * ); |
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| 423 | |
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[16ba4a6] | 424 | void resolveWithExprs(std::vector<ast::ptr<ast::Expr>> & exprs, std::list<ast::ptr<ast::Stmt>> & stmtsToAdd); |
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| 425 | |
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| 426 | void beginScope() { managedTypes.beginScope(); } |
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| 427 | void endScope() { managedTypes.endScope(); } |
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[e00c22f] | 428 | bool on_error(ast::ptr<ast::Decl> & decl); |
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[d76c588] | 429 | }; |
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[0bd3faf] | 430 | // size_t Resolver::traceId = Stats::Heap::new_stacktrace_id("Resolver"); |
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[d76c588] | 431 | |
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[0bd3faf] | 432 | InitTweak::ManagedTypes Resolver::managedTypes; |
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[16ba4a6] | 433 | |
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[293dc1c] | 434 | void resolve( ast::TranslationUnit& translationUnit ) { |
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[0bd3faf] | 435 | ast::Pass< Resolver >::run( translationUnit, translationUnit.global ); |
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[d76c588] | 436 | } |
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| 437 | |
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[ef5b828] | 438 | ast::ptr< ast::Init > resolveCtorInit( |
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[39d8950] | 439 | const ast::ConstructorInit * ctorInit, const ResolveContext & context |
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[234b1cb] | 440 | ) { |
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| 441 | assert( ctorInit ); |
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[0bd3faf] | 442 | ast::Pass< Resolver > resolver( context ); |
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[234b1cb] | 443 | return ctorInit->accept( resolver ); |
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| 444 | } |
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| 445 | |
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[302ef2a] | 446 | const ast::Expr * resolveStmtExpr( |
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[39d8950] | 447 | const ast::StmtExpr * stmtExpr, const ResolveContext & context |
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[17a0ede2] | 448 | ) { |
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| 449 | assert( stmtExpr ); |
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[0bd3faf] | 450 | ast::Pass< Resolver > resolver( context ); |
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[302ef2a] | 451 | auto ret = mutate(stmtExpr->accept(resolver)); |
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| 452 | strict_dynamic_cast< ast::StmtExpr * >( ret )->computeResult(); |
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[17a0ede2] | 453 | return ret; |
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| 454 | } |
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| 455 | |
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[16ba4a6] | 456 | namespace { |
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[39d8950] | 457 | const ast::Attribute * handleAttribute(const CodeLocation & loc, const ast::Attribute * attr, const ResolveContext & context) { |
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[16ba4a6] | 458 | std::string name = attr->normalizedName(); |
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| 459 | if (name == "constructor" || name == "destructor") { |
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| 460 | if (attr->params.size() == 1) { |
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| 461 | auto arg = attr->params.front(); |
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[39d8950] | 462 | auto resolved = ResolvExpr::findSingleExpression( arg, new ast::BasicType( ast::BasicType::LongLongSignedInt ), context ); |
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[16ba4a6] | 463 | auto result = eval(arg); |
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| 464 | |
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| 465 | auto mutAttr = mutate(attr); |
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| 466 | mutAttr->params.front() = resolved; |
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[8f557161] | 467 | if (! result.hasKnownValue) { |
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[16ba4a6] | 468 | SemanticWarning(loc, Warning::GccAttributes, |
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| 469 | toCString( name, " priorities must be integers from 0 to 65535 inclusive: ", arg ) ); |
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| 470 | } |
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| 471 | else { |
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[8f557161] | 472 | auto priority = result.knownValue; |
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[16ba4a6] | 473 | if (priority < 101) { |
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| 474 | SemanticWarning(loc, Warning::GccAttributes, |
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| 475 | toCString( name, " priorities from 0 to 100 are reserved for the implementation" ) ); |
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| 476 | } else if (priority < 201 && ! buildingLibrary()) { |
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| 477 | SemanticWarning(loc, Warning::GccAttributes, |
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| 478 | toCString( name, " priorities from 101 to 200 are reserved for the implementation" ) ); |
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| 479 | } |
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| 480 | } |
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| 481 | return mutAttr; |
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| 482 | } else if (attr->params.size() > 1) { |
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| 483 | SemanticWarning(loc, Warning::GccAttributes, toCString( "too many arguments to ", name, " attribute" ) ); |
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| 484 | } else { |
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| 485 | SemanticWarning(loc, Warning::GccAttributes, toCString( "too few arguments to ", name, " attribute" ) ); |
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| 486 | } |
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| 487 | } |
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| 488 | return attr; |
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| 489 | } |
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| 490 | } |
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| 491 | |
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[0bd3faf] | 492 | const ast::FunctionDecl * Resolver::previsit( const ast::FunctionDecl * functionDecl ) { |
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[2a8f0c1] | 493 | GuardValue( functionReturn ); |
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[16ba4a6] | 494 | |
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| 495 | assert (functionDecl->unique()); |
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| 496 | if (!functionDecl->has_body() && !functionDecl->withExprs.empty()) { |
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| 497 | SemanticError(functionDecl->location, functionDecl, "Function without body has with declarations"); |
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| 498 | } |
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| 499 | |
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| 500 | if (!functionDecl->isTypeFixed) { |
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| 501 | auto mutDecl = mutate(functionDecl); |
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| 502 | auto mutType = mutDecl->type.get_and_mutate(); |
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| 503 | |
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| 504 | for (auto & attr: mutDecl->attributes) { |
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[3bc69f2] | 505 | attr = handleAttribute(mutDecl->location, attr, context ); |
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[16ba4a6] | 506 | } |
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| 507 | |
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[3e5dd913] | 508 | // handle assertions |
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[16ba4a6] | 509 | |
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| 510 | symtab.enterScope(); |
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[3e5dd913] | 511 | mutType->forall.clear(); |
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| 512 | mutType->assertions.clear(); |
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| 513 | for (auto & typeParam : mutDecl->type_params) { |
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| 514 | symtab.addType(typeParam); |
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[b230091] | 515 | mutType->forall.emplace_back(new ast::TypeInstType(typeParam)); |
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[3e5dd913] | 516 | } |
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| 517 | for (auto & asst : mutDecl->assertions) { |
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[3bc69f2] | 518 | asst = fixObjectType(asst.strict_as<ast::ObjectDecl>(), context); |
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[3e5dd913] | 519 | symtab.addId(asst); |
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| 520 | mutType->assertions.emplace_back(new ast::VariableExpr(functionDecl->location, asst)); |
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[16ba4a6] | 521 | } |
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| 522 | |
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| 523 | // temporarily adds params to symbol table. |
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| 524 | // actual scoping rules for params and withexprs differ - see Pass::visit(FunctionDecl) |
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| 525 | |
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| 526 | std::vector<ast::ptr<ast::Type>> paramTypes; |
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| 527 | std::vector<ast::ptr<ast::Type>> returnTypes; |
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| 528 | |
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| 529 | for (auto & param : mutDecl->params) { |
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[3bc69f2] | 530 | param = fixObjectType(param.strict_as<ast::ObjectDecl>(), context); |
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[16ba4a6] | 531 | symtab.addId(param); |
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| 532 | paramTypes.emplace_back(param->get_type()); |
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| 533 | } |
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| 534 | for (auto & ret : mutDecl->returns) { |
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[3bc69f2] | 535 | ret = fixObjectType(ret.strict_as<ast::ObjectDecl>(), context); |
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[16ba4a6] | 536 | returnTypes.emplace_back(ret->get_type()); |
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| 537 | } |
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| 538 | // since function type in decl is just a view of param types, need to update that as well |
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| 539 | mutType->params = std::move(paramTypes); |
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| 540 | mutType->returns = std::move(returnTypes); |
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| 541 | |
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[3e5dd913] | 542 | auto renamedType = strict_dynamic_cast<const ast::FunctionType *>(renameTyVars(mutType, RenameMode::GEN_EXPR_ID)); |
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| 543 | |
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[16ba4a6] | 544 | std::list<ast::ptr<ast::Stmt>> newStmts; |
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| 545 | resolveWithExprs (mutDecl->withExprs, newStmts); |
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| 546 | |
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| 547 | if (mutDecl->stmts) { |
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| 548 | auto mutStmt = mutDecl->stmts.get_and_mutate(); |
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| 549 | mutStmt->kids.splice(mutStmt->kids.begin(), std::move(newStmts)); |
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| 550 | mutDecl->stmts = mutStmt; |
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| 551 | } |
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| 552 | |
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| 553 | symtab.leaveScope(); |
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| 554 | |
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[3e5dd913] | 555 | mutDecl->type = renamedType; |
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[16ba4a6] | 556 | mutDecl->mangleName = Mangle::mangle(mutDecl); |
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| 557 | mutDecl->isTypeFixed = true; |
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| 558 | functionDecl = mutDecl; |
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| 559 | } |
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| 560 | managedTypes.handleDWT(functionDecl); |
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| 561 | |
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[2a8f0c1] | 562 | functionReturn = extractResultType( functionDecl->type ); |
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[16ba4a6] | 563 | return functionDecl; |
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[d76c588] | 564 | } |
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| 565 | |
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[0bd3faf] | 566 | const ast::FunctionDecl * Resolver::postvisit( const ast::FunctionDecl * functionDecl ) { |
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[4864a73] | 567 | // default value expressions have an environment which shouldn't be there and trips up |
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[2a8f0c1] | 568 | // later passes. |
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[e068c8a] | 569 | assert( functionDecl->unique() ); |
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| 570 | ast::FunctionType * mutType = mutate( functionDecl->type.get() ); |
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| 571 | |
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| 572 | for ( unsigned i = 0 ; i < mutType->params.size() ; ++i ) { |
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| 573 | if ( const ast::ObjectDecl * obj = mutType->params[i].as< ast::ObjectDecl >() ) { |
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| 574 | if ( const ast::SingleInit * init = obj->init.as< ast::SingleInit >() ) { |
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| 575 | if ( init->value->env == nullptr ) continue; |
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| 576 | // clone initializer minus the initializer environment |
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| 577 | auto mutParam = mutate( mutType->params[i].strict_as< ast::ObjectDecl >() ); |
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| 578 | auto mutInit = mutate( mutParam->init.strict_as< ast::SingleInit >() ); |
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| 579 | auto mutValue = mutate( mutInit->value.get() ); |
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| 580 | |
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| 581 | mutValue->env = nullptr; |
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| 582 | mutInit->value = mutValue; |
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| 583 | mutParam->init = mutInit; |
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| 584 | mutType->params[i] = mutParam; |
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| 585 | |
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| 586 | assert( ! mutType->params[i].strict_as< ast::ObjectDecl >()->init.strict_as< ast::SingleInit >()->value->env); |
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| 587 | } |
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| 588 | } |
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[2a8f0c1] | 589 | } |
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[73973b6] | 590 | mutate_field(functionDecl, &ast::FunctionDecl::type, mutType); |
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| 591 | return functionDecl; |
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[d76c588] | 592 | } |
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| 593 | |
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[0bd3faf] | 594 | const ast::ObjectDecl * Resolver::previsit( const ast::ObjectDecl * objectDecl ) { |
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[ef5b828] | 595 | // To handle initialization of routine pointers [e.g. int (*fp)(int) = foo()], |
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| 596 | // class-variable `initContext` is changed multiple times because the LHS is analyzed |
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| 597 | // twice. The second analysis changes `initContext` because a function type can contain |
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| 598 | // object declarations in the return and parameter types. Therefore each value of |
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| 599 | // `initContext` is retained so the type on the first analysis is preserved and used for |
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[b7d92b96] | 600 | // selecting the RHS. |
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| 601 | GuardValue( currentObject ); |
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[16ba4a6] | 602 | |
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[b7d92b96] | 603 | if ( inEnumDecl && dynamic_cast< const ast::EnumInstType * >( objectDecl->get_type() ) ) { |
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[ef5b828] | 604 | // enumerator initializers should not use the enum type to initialize, since the |
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[b7d92b96] | 605 | // enum type is still incomplete at this point. Use `int` instead. |
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[4559b34] | 606 | |
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[12df6fe] | 607 | if ( auto enumBase = dynamic_cast< const ast::EnumInstType * > |
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| 608 | ( objectDecl->get_type() )->base->base ) { |
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[5bb1ac1] | 609 | objectDecl = fixObjectType( objectDecl, context ); |
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[2345ab3] | 610 | currentObject = ast::CurrentObject{ |
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| 611 | objectDecl->location, |
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[5bb1ac1] | 612 | enumBase |
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| 613 | }; |
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[4559b34] | 614 | } else { |
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[5bb1ac1] | 615 | objectDecl = fixObjectType( objectDecl, context ); |
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[4559b34] | 616 | currentObject = ast::CurrentObject{ |
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| 617 | objectDecl->location, new ast::BasicType{ ast::BasicType::SignedInt } }; |
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| 618 | } |
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| 619 | |
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[b7d92b96] | 620 | } |
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[16ba4a6] | 621 | else { |
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[12df6fe] | 622 | if ( !objectDecl->isTypeFixed ) { |
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[3bc69f2] | 623 | auto newDecl = fixObjectType(objectDecl, context); |
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[16ba4a6] | 624 | auto mutDecl = mutate(newDecl); |
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[4a8f150] | 625 | |
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[16ba4a6] | 626 | // generate CtorInit wrapper when necessary. |
---|
| 627 | // in certain cases, fixObjectType is called before reaching |
---|
| 628 | // this object in visitor pass, thus disabling CtorInit codegen. |
---|
| 629 | // this happens on aggregate members and function parameters. |
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| 630 | if ( InitTweak::tryConstruct( mutDecl ) && ( managedTypes.isManaged( mutDecl ) || ((! isInFunction() || mutDecl->storage.is_static ) && ! InitTweak::isConstExpr( mutDecl->init ) ) ) ) { |
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| 631 | // constructed objects cannot be designated |
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[92355883] | 632 | if ( InitTweak::isDesignated( mutDecl->init ) ) { |
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[0bd3faf] | 633 | ast::Pass<ResolveDesignators> res( context ); |
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[4894239] | 634 | maybe_accept( mutDecl->init.get(), res ); |
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| 635 | if ( !res.core.result ) { |
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[ca9d65e] | 636 | SemanticError( mutDecl, "Cannot include designations in the initializer for a managed Object.\n" |
---|
| 637 | "If this is really what you want, initialize with @=." ); |
---|
[4894239] | 638 | } |
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[92355883] | 639 | } |
---|
[16ba4a6] | 640 | // constructed objects should not have initializers nested too deeply |
---|
| 641 | if ( ! InitTweak::checkInitDepth( mutDecl ) ) SemanticError( mutDecl, "Managed object's initializer is too deep " ); |
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| 642 | |
---|
| 643 | mutDecl->init = InitTweak::genCtorInit( mutDecl->location, mutDecl ); |
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| 644 | } |
---|
| 645 | |
---|
| 646 | objectDecl = mutDecl; |
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| 647 | } |
---|
| 648 | currentObject = ast::CurrentObject{ objectDecl->location, objectDecl->get_type() }; |
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| 649 | } |
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[4a8f150] | 650 | |
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[16ba4a6] | 651 | return objectDecl; |
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| 652 | } |
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| 653 | |
---|
[0bd3faf] | 654 | void Resolver::previsit( const ast::AggregateDecl * _aggDecl ) { |
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[16ba4a6] | 655 | auto aggDecl = mutate(_aggDecl); |
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| 656 | assertf(aggDecl == _aggDecl, "type declarations must be unique"); |
---|
| 657 | |
---|
| 658 | for (auto & member: aggDecl->members) { |
---|
| 659 | // nested type decls are hoisted already. no need to do anything |
---|
| 660 | if (auto obj = member.as<ast::ObjectDecl>()) { |
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[3bc69f2] | 661 | member = fixObjectType(obj, context); |
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[16ba4a6] | 662 | } |
---|
| 663 | } |
---|
| 664 | } |
---|
| 665 | |
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[0bd3faf] | 666 | void Resolver::previsit( const ast::StructDecl * structDecl ) { |
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[16ba4a6] | 667 | previsit(static_cast<const ast::AggregateDecl *>(structDecl)); |
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| 668 | managedTypes.handleStruct(structDecl); |
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[d76c588] | 669 | } |
---|
| 670 | |
---|
[0bd3faf] | 671 | void Resolver::previsit( const ast::EnumDecl * ) { |
---|
[99d4584] | 672 | // in case we decide to allow nested enums |
---|
| 673 | GuardValue( inEnumDecl ); |
---|
[2890212] | 674 | inEnumDecl = true; |
---|
[16ba4a6] | 675 | // don't need to fix types for enum fields |
---|
[d76c588] | 676 | } |
---|
| 677 | |
---|
[0bd3faf] | 678 | const ast::StaticAssertDecl * Resolver::previsit( |
---|
[ef5b828] | 679 | const ast::StaticAssertDecl * assertDecl |
---|
[99d4584] | 680 | ) { |
---|
[ef5b828] | 681 | return ast::mutate_field( |
---|
| 682 | assertDecl, &ast::StaticAssertDecl::cond, |
---|
[3bc69f2] | 683 | findIntegralExpression( assertDecl->cond, context ) ); |
---|
[b7d92b96] | 684 | } |
---|
| 685 | |
---|
| 686 | template< typename PtrType > |
---|
[39d8950] | 687 | const PtrType * handlePtrType( const PtrType * type, const ResolveContext & context ) { |
---|
[0f6a7752] | 688 | if ( type->dimension ) { |
---|
[5cf1228] | 689 | const ast::Type * sizeType = context.global.sizeType.get(); |
---|
[9e23b446] | 690 | ast::ptr< ast::Expr > dimension = findSingleExpression( type->dimension, sizeType, context ); |
---|
| 691 | assertf(dimension->env->empty(), "array dimension expr has nonempty env"); |
---|
| 692 | dimension.get_and_mutate()->env = nullptr; |
---|
[5cf1228] | 693 | ast::mutate_field( type, &PtrType::dimension, dimension ); |
---|
[0f6a7752] | 694 | } |
---|
| 695 | return type; |
---|
[d76c588] | 696 | } |
---|
| 697 | |
---|
[0bd3faf] | 698 | const ast::ArrayType * Resolver::previsit( const ast::ArrayType * at ) { |
---|
[3bc69f2] | 699 | return handlePtrType( at, context ); |
---|
[d76c588] | 700 | } |
---|
| 701 | |
---|
[0bd3faf] | 702 | const ast::PointerType * Resolver::previsit( const ast::PointerType * pt ) { |
---|
[3bc69f2] | 703 | return handlePtrType( pt, context ); |
---|
[d76c588] | 704 | } |
---|
| 705 | |
---|
[0bd3faf] | 706 | const ast::ExprStmt * Resolver::previsit( const ast::ExprStmt * exprStmt ) { |
---|
[b7d92b96] | 707 | visit_children = false; |
---|
| 708 | assertf( exprStmt->expr, "ExprStmt has null expression in resolver" ); |
---|
[ef5b828] | 709 | |
---|
| 710 | return ast::mutate_field( |
---|
[3bc69f2] | 711 | exprStmt, &ast::ExprStmt::expr, findVoidExpression( exprStmt->expr, context ) ); |
---|
[d76c588] | 712 | } |
---|
| 713 | |
---|
[0bd3faf] | 714 | const ast::AsmExpr * Resolver::previsit( const ast::AsmExpr * asmExpr ) { |
---|
[b7d92b96] | 715 | visit_children = false; |
---|
| 716 | |
---|
[ef5b828] | 717 | asmExpr = ast::mutate_field( |
---|
[3bc69f2] | 718 | asmExpr, &ast::AsmExpr::operand, findVoidExpression( asmExpr->operand, context ) ); |
---|
[ef5b828] | 719 | |
---|
[b7d92b96] | 720 | return asmExpr; |
---|
[d76c588] | 721 | } |
---|
| 722 | |
---|
[0bd3faf] | 723 | const ast::AsmStmt * Resolver::previsit( const ast::AsmStmt * asmStmt ) { |
---|
[2b59f55] | 724 | visitor->maybe_accept( asmStmt, &ast::AsmStmt::input ); |
---|
| 725 | visitor->maybe_accept( asmStmt, &ast::AsmStmt::output ); |
---|
| 726 | visit_children = false; |
---|
| 727 | return asmStmt; |
---|
[d76c588] | 728 | } |
---|
| 729 | |
---|
[0bd3faf] | 730 | const ast::IfStmt * Resolver::previsit( const ast::IfStmt * ifStmt ) { |
---|
[b7d92b96] | 731 | return ast::mutate_field( |
---|
[3bc69f2] | 732 | ifStmt, &ast::IfStmt::cond, findIntegralExpression( ifStmt->cond, context ) ); |
---|
[d76c588] | 733 | } |
---|
| 734 | |
---|
[0bd3faf] | 735 | const ast::WhileDoStmt * Resolver::previsit( const ast::WhileDoStmt * whileDoStmt ) { |
---|
[ef5b828] | 736 | return ast::mutate_field( |
---|
[3bc69f2] | 737 | whileDoStmt, &ast::WhileDoStmt::cond, findIntegralExpression( whileDoStmt->cond, context ) ); |
---|
[d76c588] | 738 | } |
---|
| 739 | |
---|
[0bd3faf] | 740 | const ast::ForStmt * Resolver::previsit( const ast::ForStmt * forStmt ) { |
---|
[b7d92b96] | 741 | if ( forStmt->cond ) { |
---|
| 742 | forStmt = ast::mutate_field( |
---|
[3bc69f2] | 743 | forStmt, &ast::ForStmt::cond, findIntegralExpression( forStmt->cond, context ) ); |
---|
[b7d92b96] | 744 | } |
---|
| 745 | |
---|
| 746 | if ( forStmt->inc ) { |
---|
| 747 | forStmt = ast::mutate_field( |
---|
[3bc69f2] | 748 | forStmt, &ast::ForStmt::inc, findVoidExpression( forStmt->inc, context ) ); |
---|
[b7d92b96] | 749 | } |
---|
| 750 | |
---|
| 751 | return forStmt; |
---|
[d76c588] | 752 | } |
---|
| 753 | |
---|
[0bd3faf] | 754 | const ast::SwitchStmt * Resolver::previsit( const ast::SwitchStmt * switchStmt ) { |
---|
[b7d92b96] | 755 | GuardValue( currentObject ); |
---|
| 756 | switchStmt = ast::mutate_field( |
---|
[ef5b828] | 757 | switchStmt, &ast::SwitchStmt::cond, |
---|
[3bc69f2] | 758 | findIntegralExpression( switchStmt->cond, context ) ); |
---|
[2b59f55] | 759 | currentObject = ast::CurrentObject{ switchStmt->location, switchStmt->cond->result }; |
---|
[b7d92b96] | 760 | return switchStmt; |
---|
[d76c588] | 761 | } |
---|
| 762 | |
---|
[0bd3faf] | 763 | const ast::CaseClause * Resolver::previsit( const ast::CaseClause * caseStmt ) { |
---|
[b7d92b96] | 764 | if ( caseStmt->cond ) { |
---|
[60aaa51d] | 765 | std::deque< ast::InitAlternative > initAlts = currentObject.getOptions(); |
---|
[2b59f55] | 766 | assertf( initAlts.size() == 1, "SwitchStmt did not correctly resolve an integral " |
---|
| 767 | "expression." ); |
---|
[ef5b828] | 768 | |
---|
| 769 | ast::ptr< ast::Expr > untyped = |
---|
[2b59f55] | 770 | new ast::CastExpr{ caseStmt->location, caseStmt->cond, initAlts.front().type }; |
---|
[3bc69f2] | 771 | ast::ptr< ast::Expr > newExpr = findSingleExpression( untyped, context ); |
---|
[ef5b828] | 772 | |
---|
| 773 | // case condition cannot have a cast in C, so it must be removed here, regardless of |
---|
[2b59f55] | 774 | // whether it would perform a conversion. |
---|
| 775 | if ( const ast::CastExpr * castExpr = newExpr.as< ast::CastExpr >() ) { |
---|
[60aaa51d] | 776 | swap_and_save_env( newExpr, castExpr->arg ); |
---|
[2b59f55] | 777 | } |
---|
[ef5b828] | 778 | |
---|
[400b8be] | 779 | caseStmt = ast::mutate_field( caseStmt, &ast::CaseClause::cond, newExpr ); |
---|
[b7d92b96] | 780 | } |
---|
| 781 | return caseStmt; |
---|
[d76c588] | 782 | } |
---|
| 783 | |
---|
[0bd3faf] | 784 | const ast::BranchStmt * Resolver::previsit( const ast::BranchStmt * branchStmt ) { |
---|
[b7d92b96] | 785 | visit_children = false; |
---|
| 786 | // must resolve the argument of a computed goto |
---|
| 787 | if ( branchStmt->kind == ast::BranchStmt::Goto && branchStmt->computedTarget ) { |
---|
| 788 | // computed goto argument is void* |
---|
[2773ab8] | 789 | ast::ptr< ast::Type > target = new ast::PointerType{ new ast::VoidType{} }; |
---|
[b7d92b96] | 790 | branchStmt = ast::mutate_field( |
---|
[ef5b828] | 791 | branchStmt, &ast::BranchStmt::computedTarget, |
---|
[3bc69f2] | 792 | findSingleExpression( branchStmt->computedTarget, target, context ) ); |
---|
[b7d92b96] | 793 | } |
---|
| 794 | return branchStmt; |
---|
[d76c588] | 795 | } |
---|
| 796 | |
---|
[0bd3faf] | 797 | const ast::ReturnStmt * Resolver::previsit( const ast::ReturnStmt * returnStmt ) { |
---|
[2b59f55] | 798 | visit_children = false; |
---|
| 799 | if ( returnStmt->expr ) { |
---|
| 800 | returnStmt = ast::mutate_field( |
---|
[ef5b828] | 801 | returnStmt, &ast::ReturnStmt::expr, |
---|
[3bc69f2] | 802 | findSingleExpression( returnStmt->expr, functionReturn, context ) ); |
---|
[2b59f55] | 803 | } |
---|
| 804 | return returnStmt; |
---|
[d76c588] | 805 | } |
---|
| 806 | |
---|
[0bd3faf] | 807 | const ast::ThrowStmt * Resolver::previsit( const ast::ThrowStmt * throwStmt ) { |
---|
[2b59f55] | 808 | visit_children = false; |
---|
| 809 | if ( throwStmt->expr ) { |
---|
[ef5b828] | 810 | const ast::StructDecl * exceptionDecl = |
---|
[3090127] | 811 | symtab.lookupStruct( "__cfaehm_base_exception_t" ); |
---|
[2b59f55] | 812 | assert( exceptionDecl ); |
---|
[ef5b828] | 813 | ast::ptr< ast::Type > exceptType = |
---|
[2b59f55] | 814 | new ast::PointerType{ new ast::StructInstType{ exceptionDecl } }; |
---|
| 815 | throwStmt = ast::mutate_field( |
---|
[ef5b828] | 816 | throwStmt, &ast::ThrowStmt::expr, |
---|
[3bc69f2] | 817 | findSingleExpression( throwStmt->expr, exceptType, context ) ); |
---|
[2b59f55] | 818 | } |
---|
| 819 | return throwStmt; |
---|
[d76c588] | 820 | } |
---|
| 821 | |
---|
[0bd3faf] | 822 | const ast::CatchClause * Resolver::previsit( const ast::CatchClause * catchClause ) { |
---|
[3b0bc16] | 823 | // Until we are very sure this invarent (ifs that move between passes have then) |
---|
[b9fa85b] | 824 | // holds, check it. This allows a check for when to decode the mangling. |
---|
[400b8be] | 825 | if ( auto ifStmt = catchClause->body.as<ast::IfStmt>() ) { |
---|
[3b0bc16] | 826 | assert( ifStmt->then ); |
---|
[b9fa85b] | 827 | } |
---|
| 828 | // Encode the catchStmt so the condition can see the declaration. |
---|
[400b8be] | 829 | if ( catchClause->cond ) { |
---|
| 830 | ast::CatchClause * clause = mutate( catchClause ); |
---|
| 831 | clause->body = new ast::IfStmt( clause->location, clause->cond, nullptr, clause->body ); |
---|
| 832 | clause->cond = nullptr; |
---|
| 833 | return clause; |
---|
[b9fa85b] | 834 | } |
---|
[400b8be] | 835 | return catchClause; |
---|
[b9fa85b] | 836 | } |
---|
| 837 | |
---|
[0bd3faf] | 838 | const ast::CatchClause * Resolver::postvisit( const ast::CatchClause * catchClause ) { |
---|
[b9fa85b] | 839 | // Decode the catchStmt so everything is stored properly. |
---|
[400b8be] | 840 | const ast::IfStmt * ifStmt = catchClause->body.as<ast::IfStmt>(); |
---|
[3b0bc16] | 841 | if ( nullptr != ifStmt && nullptr == ifStmt->then ) { |
---|
[b9fa85b] | 842 | assert( ifStmt->cond ); |
---|
[3b0bc16] | 843 | assert( ifStmt->else_ ); |
---|
[400b8be] | 844 | ast::CatchClause * clause = ast::mutate( catchClause ); |
---|
| 845 | clause->cond = ifStmt->cond; |
---|
| 846 | clause->body = ifStmt->else_; |
---|
[b9fa85b] | 847 | // ifStmt should be implicately deleted here. |
---|
[400b8be] | 848 | return clause; |
---|
[2b59f55] | 849 | } |
---|
[400b8be] | 850 | return catchClause; |
---|
[d76c588] | 851 | } |
---|
| 852 | |
---|
[0bd3faf] | 853 | const ast::WaitForStmt * Resolver::previsit( const ast::WaitForStmt * stmt ) { |
---|
[2773ab8] | 854 | visit_children = false; |
---|
| 855 | |
---|
| 856 | // Resolve all clauses first |
---|
| 857 | for ( unsigned i = 0; i < stmt->clauses.size(); ++i ) { |
---|
[f6e6a55] | 858 | const ast::WaitForClause & clause = *stmt->clauses[i]; |
---|
[2773ab8] | 859 | |
---|
| 860 | ast::TypeEnvironment env; |
---|
[3bc69f2] | 861 | CandidateFinder funcFinder( context, env ); |
---|
[2773ab8] | 862 | |
---|
| 863 | // Find all candidates for a function in canonical form |
---|
[4a89b52] | 864 | funcFinder.find( clause.target, ResolveMode::withAdjustment() ); |
---|
[2773ab8] | 865 | |
---|
| 866 | if ( funcFinder.candidates.empty() ) { |
---|
| 867 | stringstream ss; |
---|
| 868 | ss << "Use of undeclared indentifier '"; |
---|
[c86b08d] | 869 | ss << clause.target.strict_as< ast::NameExpr >()->name; |
---|
[2773ab8] | 870 | ss << "' in call to waitfor"; |
---|
| 871 | SemanticError( stmt->location, ss.str() ); |
---|
| 872 | } |
---|
| 873 | |
---|
[f6e6a55] | 874 | if ( clause.target_args.empty() ) { |
---|
[ef5b828] | 875 | SemanticError( stmt->location, |
---|
[2773ab8] | 876 | "Waitfor clause must have at least one mutex parameter"); |
---|
| 877 | } |
---|
| 878 | |
---|
| 879 | // Find all alternatives for all arguments in canonical form |
---|
[ef5b828] | 880 | std::vector< CandidateFinder > argFinders = |
---|
[f6e6a55] | 881 | funcFinder.findSubExprs( clause.target_args ); |
---|
[ef5b828] | 882 | |
---|
[2773ab8] | 883 | // List all combinations of arguments |
---|
| 884 | std::vector< CandidateList > possibilities; |
---|
| 885 | combos( argFinders.begin(), argFinders.end(), back_inserter( possibilities ) ); |
---|
| 886 | |
---|
| 887 | // For every possible function: |
---|
[ef5b828] | 888 | // * try matching the arguments to the parameters, not the other way around because |
---|
[2773ab8] | 889 | // more arguments than parameters |
---|
| 890 | CandidateList funcCandidates; |
---|
| 891 | std::vector< CandidateList > argsCandidates; |
---|
| 892 | SemanticErrorException errors; |
---|
| 893 | for ( CandidateRef & func : funcFinder.candidates ) { |
---|
| 894 | try { |
---|
[ef5b828] | 895 | auto pointerType = dynamic_cast< const ast::PointerType * >( |
---|
[2773ab8] | 896 | func->expr->result->stripReferences() ); |
---|
| 897 | if ( ! pointerType ) { |
---|
[ef5b828] | 898 | SemanticError( stmt->location, func->expr->result.get(), |
---|
[2773ab8] | 899 | "candidate not viable: not a pointer type\n" ); |
---|
| 900 | } |
---|
| 901 | |
---|
| 902 | auto funcType = pointerType->base.as< ast::FunctionType >(); |
---|
| 903 | if ( ! funcType ) { |
---|
[ef5b828] | 904 | SemanticError( stmt->location, func->expr->result.get(), |
---|
[2773ab8] | 905 | "candidate not viable: not a function type\n" ); |
---|
| 906 | } |
---|
| 907 | |
---|
| 908 | { |
---|
| 909 | auto param = funcType->params.begin(); |
---|
| 910 | auto paramEnd = funcType->params.end(); |
---|
| 911 | |
---|
| 912 | if( ! nextMutex( param, paramEnd ) ) { |
---|
[ef5b828] | 913 | SemanticError( stmt->location, funcType, |
---|
[2773ab8] | 914 | "candidate function not viable: no mutex parameters\n"); |
---|
| 915 | } |
---|
| 916 | } |
---|
| 917 | |
---|
| 918 | CandidateRef func2{ new Candidate{ *func } }; |
---|
| 919 | // strip reference from function |
---|
| 920 | func2->expr = referenceToRvalueConversion( func->expr, func2->cost ); |
---|
| 921 | |
---|
| 922 | // Each argument must be matched with a parameter of the current candidate |
---|
| 923 | for ( auto & argsList : possibilities ) { |
---|
| 924 | try { |
---|
| 925 | // Declare data structures needed for resolution |
---|
| 926 | ast::OpenVarSet open; |
---|
| 927 | ast::AssertionSet need, have; |
---|
| 928 | ast::TypeEnvironment resultEnv{ func->env }; |
---|
[ef5b828] | 929 | // Add all type variables as open so that those not used in the |
---|
[2773ab8] | 930 | // parameter list are still considered open |
---|
| 931 | resultEnv.add( funcType->forall ); |
---|
| 932 | |
---|
| 933 | // load type variables from arguments into one shared space |
---|
| 934 | for ( auto & arg : argsList ) { |
---|
| 935 | resultEnv.simpleCombine( arg->env ); |
---|
| 936 | } |
---|
| 937 | |
---|
| 938 | // Make sure we don't widen any existing bindings |
---|
| 939 | resultEnv.forbidWidening(); |
---|
| 940 | |
---|
| 941 | // Find any unbound type variables |
---|
| 942 | resultEnv.extractOpenVars( open ); |
---|
| 943 | |
---|
| 944 | auto param = funcType->params.begin(); |
---|
| 945 | auto paramEnd = funcType->params.end(); |
---|
| 946 | |
---|
| 947 | unsigned n_mutex_param = 0; |
---|
| 948 | |
---|
[ef5b828] | 949 | // For every argument of its set, check if it matches one of the |
---|
[2773ab8] | 950 | // parameters. The order is important |
---|
| 951 | for ( auto & arg : argsList ) { |
---|
| 952 | // Ignore non-mutex arguments |
---|
| 953 | if ( ! nextMutex( param, paramEnd ) ) { |
---|
| 954 | // We ran out of parameters but still have arguments. |
---|
| 955 | // This function doesn't match |
---|
[ef5b828] | 956 | SemanticError( stmt->location, funcType, |
---|
[2773ab8] | 957 | toString("candidate function not viable: too many mutex " |
---|
| 958 | "arguments, expected ", n_mutex_param, "\n" ) ); |
---|
| 959 | } |
---|
| 960 | |
---|
| 961 | ++n_mutex_param; |
---|
| 962 | |
---|
[4c2fe47] | 963 | // Check if the argument matches the parameter type in the current scope. |
---|
[954c954] | 964 | // ast::ptr< ast::Type > paramType = (*param)->get_type(); |
---|
[4c2fe47] | 965 | |
---|
[ef5b828] | 966 | if ( |
---|
| 967 | ! unify( |
---|
[251ce80] | 968 | arg->expr->result, *param, resultEnv, need, have, open ) |
---|
[2773ab8] | 969 | ) { |
---|
| 970 | // Type doesn't match |
---|
| 971 | stringstream ss; |
---|
| 972 | ss << "candidate function not viable: no known conversion " |
---|
| 973 | "from '"; |
---|
[954c954] | 974 | ast::print( ss, *param ); |
---|
[2773ab8] | 975 | ss << "' to '"; |
---|
| 976 | ast::print( ss, arg->expr->result ); |
---|
| 977 | ss << "' with env '"; |
---|
| 978 | ast::print( ss, resultEnv ); |
---|
| 979 | ss << "'\n"; |
---|
| 980 | SemanticError( stmt->location, funcType, ss.str() ); |
---|
| 981 | } |
---|
| 982 | |
---|
| 983 | ++param; |
---|
| 984 | } |
---|
| 985 | |
---|
| 986 | // All arguments match! |
---|
| 987 | |
---|
| 988 | // Check if parameters are missing |
---|
| 989 | if ( nextMutex( param, paramEnd ) ) { |
---|
| 990 | do { |
---|
| 991 | ++n_mutex_param; |
---|
| 992 | ++param; |
---|
| 993 | } while ( nextMutex( param, paramEnd ) ); |
---|
| 994 | |
---|
[ef5b828] | 995 | // We ran out of arguments but still have parameters left; this |
---|
[2773ab8] | 996 | // function doesn't match |
---|
[ef5b828] | 997 | SemanticError( stmt->location, funcType, |
---|
[2773ab8] | 998 | toString( "candidate function not viable: too few mutex " |
---|
| 999 | "arguments, expected ", n_mutex_param, "\n" ) ); |
---|
| 1000 | } |
---|
| 1001 | |
---|
| 1002 | // All parameters match! |
---|
| 1003 | |
---|
| 1004 | // Finish the expressions to tie in proper environments |
---|
| 1005 | finishExpr( func2->expr, resultEnv ); |
---|
| 1006 | for ( CandidateRef & arg : argsList ) { |
---|
| 1007 | finishExpr( arg->expr, resultEnv ); |
---|
| 1008 | } |
---|
| 1009 | |
---|
| 1010 | // This is a match, store it and save it for later |
---|
| 1011 | funcCandidates.emplace_back( std::move( func2 ) ); |
---|
| 1012 | argsCandidates.emplace_back( std::move( argsList ) ); |
---|
| 1013 | |
---|
| 1014 | } catch ( SemanticErrorException & e ) { |
---|
| 1015 | errors.append( e ); |
---|
| 1016 | } |
---|
| 1017 | } |
---|
| 1018 | } catch ( SemanticErrorException & e ) { |
---|
| 1019 | errors.append( e ); |
---|
| 1020 | } |
---|
| 1021 | } |
---|
| 1022 | |
---|
| 1023 | // Make sure correct number of arguments |
---|
| 1024 | if( funcCandidates.empty() ) { |
---|
[ef5b828] | 1025 | SemanticErrorException top( stmt->location, |
---|
[2773ab8] | 1026 | "No alternatives for function in call to waitfor" ); |
---|
| 1027 | top.append( errors ); |
---|
| 1028 | throw top; |
---|
| 1029 | } |
---|
| 1030 | |
---|
| 1031 | if( argsCandidates.empty() ) { |
---|
[ef5b828] | 1032 | SemanticErrorException top( stmt->location, |
---|
| 1033 | "No alternatives for arguments in call to waitfor" ); |
---|
[2773ab8] | 1034 | top.append( errors ); |
---|
| 1035 | throw top; |
---|
| 1036 | } |
---|
| 1037 | |
---|
| 1038 | if( funcCandidates.size() > 1 ) { |
---|
[ef5b828] | 1039 | SemanticErrorException top( stmt->location, |
---|
[2773ab8] | 1040 | "Ambiguous function in call to waitfor" ); |
---|
| 1041 | top.append( errors ); |
---|
| 1042 | throw top; |
---|
| 1043 | } |
---|
| 1044 | if( argsCandidates.size() > 1 ) { |
---|
| 1045 | SemanticErrorException top( stmt->location, |
---|
| 1046 | "Ambiguous arguments in call to waitfor" ); |
---|
| 1047 | top.append( errors ); |
---|
| 1048 | throw top; |
---|
| 1049 | } |
---|
| 1050 | // TODO: need to use findDeletedExpr to ensure no deleted identifiers are used. |
---|
| 1051 | |
---|
| 1052 | // build new clause |
---|
[f6e6a55] | 1053 | auto clause2 = new ast::WaitForClause( clause.location ); |
---|
[ef5b828] | 1054 | |
---|
[c86b08d] | 1055 | clause2->target = funcCandidates.front()->expr; |
---|
[ef5b828] | 1056 | |
---|
[f6e6a55] | 1057 | clause2->target_args.reserve( clause.target_args.size() ); |
---|
[6668a3e] | 1058 | const ast::StructDecl * decl_monitor = symtab.lookupStruct( "monitor$" ); |
---|
[2773ab8] | 1059 | for ( auto arg : argsCandidates.front() ) { |
---|
[6668a3e] | 1060 | const auto & loc = stmt->location; |
---|
| 1061 | |
---|
| 1062 | ast::Expr * init = new ast::CastExpr( loc, |
---|
| 1063 | new ast::UntypedExpr( loc, |
---|
| 1064 | new ast::NameExpr( loc, "get_monitor" ), |
---|
| 1065 | { arg->expr } |
---|
| 1066 | ), |
---|
| 1067 | new ast::PointerType( |
---|
| 1068 | new ast::StructInstType( |
---|
| 1069 | decl_monitor |
---|
| 1070 | ) |
---|
| 1071 | ) |
---|
| 1072 | ); |
---|
| 1073 | |
---|
[f6e6a55] | 1074 | clause2->target_args.emplace_back( findSingleExpression( init, context ) ); |
---|
[2773ab8] | 1075 | } |
---|
| 1076 | |
---|
| 1077 | // Resolve the conditions as if it were an IfStmt, statements normally |
---|
[c86b08d] | 1078 | clause2->when_cond = findSingleExpression( clause.when_cond, context ); |
---|
[f6e6a55] | 1079 | clause2->stmt = clause.stmt->accept( *visitor ); |
---|
[2773ab8] | 1080 | |
---|
| 1081 | // set results into stmt |
---|
| 1082 | auto n = mutate( stmt ); |
---|
[f6e6a55] | 1083 | n->clauses[i] = clause2; |
---|
[2773ab8] | 1084 | stmt = n; |
---|
| 1085 | } |
---|
| 1086 | |
---|
[f6e6a55] | 1087 | if ( stmt->timeout_stmt ) { |
---|
[2773ab8] | 1088 | // resolve the timeout as a size_t, the conditions like IfStmt, and stmts normally |
---|
[ef5b828] | 1089 | ast::ptr< ast::Type > target = |
---|
[2773ab8] | 1090 | new ast::BasicType{ ast::BasicType::LongLongUnsignedInt }; |
---|
[f6e6a55] | 1091 | auto timeout_time = findSingleExpression( stmt->timeout_time, target, context ); |
---|
| 1092 | auto timeout_cond = findSingleExpression( stmt->timeout_cond, context ); |
---|
| 1093 | auto timeout_stmt = stmt->timeout_stmt->accept( *visitor ); |
---|
[2773ab8] | 1094 | |
---|
| 1095 | // set results into stmt |
---|
| 1096 | auto n = mutate( stmt ); |
---|
[f6e6a55] | 1097 | n->timeout_time = std::move( timeout_time ); |
---|
| 1098 | n->timeout_cond = std::move( timeout_cond ); |
---|
| 1099 | n->timeout_stmt = std::move( timeout_stmt ); |
---|
[2773ab8] | 1100 | stmt = n; |
---|
| 1101 | } |
---|
| 1102 | |
---|
[f6e6a55] | 1103 | if ( stmt->else_stmt ) { |
---|
[2773ab8] | 1104 | // resolve the condition like IfStmt, stmts normally |
---|
[f6e6a55] | 1105 | auto else_cond = findSingleExpression( stmt->else_cond, context ); |
---|
| 1106 | auto else_stmt = stmt->else_stmt->accept( *visitor ); |
---|
[2773ab8] | 1107 | |
---|
| 1108 | // set results into stmt |
---|
| 1109 | auto n = mutate( stmt ); |
---|
[f6e6a55] | 1110 | n->else_cond = std::move( else_cond ); |
---|
| 1111 | n->else_stmt = std::move( else_stmt ); |
---|
[2773ab8] | 1112 | stmt = n; |
---|
| 1113 | } |
---|
| 1114 | |
---|
| 1115 | return stmt; |
---|
[d76c588] | 1116 | } |
---|
| 1117 | |
---|
[0bd3faf] | 1118 | const ast::WithStmt * Resolver::previsit( const ast::WithStmt * withStmt ) { |
---|
[16ba4a6] | 1119 | auto mutStmt = mutate(withStmt); |
---|
| 1120 | resolveWithExprs(mutStmt->exprs, stmtsToAddBefore); |
---|
| 1121 | return mutStmt; |
---|
| 1122 | } |
---|
| 1123 | |
---|
[0bd3faf] | 1124 | void Resolver::resolveWithExprs(std::vector<ast::ptr<ast::Expr>> & exprs, std::list<ast::ptr<ast::Stmt>> & stmtsToAdd) { |
---|
[16ba4a6] | 1125 | for (auto & expr : exprs) { |
---|
| 1126 | // only struct- and union-typed expressions are viable candidates |
---|
[3bc69f2] | 1127 | expr = findKindExpression( expr, context, structOrUnion, "with expression" ); |
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[16ba4a6] | 1128 | |
---|
| 1129 | // if with expression might be impure, create a temporary so that it is evaluated once |
---|
| 1130 | if ( Tuples::maybeImpure( expr ) ) { |
---|
| 1131 | static UniqueName tmpNamer( "_with_tmp_" ); |
---|
| 1132 | const CodeLocation loc = expr->location; |
---|
| 1133 | auto tmp = new ast::ObjectDecl(loc, tmpNamer.newName(), expr->result, new ast::SingleInit(loc, expr ) ); |
---|
| 1134 | expr = new ast::VariableExpr( loc, tmp ); |
---|
| 1135 | stmtsToAdd.push_back( new ast::DeclStmt(loc, tmp ) ); |
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| 1136 | if ( InitTweak::isConstructable( tmp->type ) ) { |
---|
| 1137 | // generate ctor/dtor and resolve them |
---|
| 1138 | tmp->init = InitTweak::genCtorInit( loc, tmp ); |
---|
| 1139 | } |
---|
| 1140 | // since tmp is freshly created, this should modify tmp in-place |
---|
| 1141 | tmp->accept( *visitor ); |
---|
| 1142 | } |
---|
[9e23b446] | 1143 | else if (expr->env && expr->env->empty()) { |
---|
| 1144 | expr = ast::mutate_field(expr.get(), &ast::Expr::env, nullptr); |
---|
| 1145 | } |
---|
[16ba4a6] | 1146 | } |
---|
| 1147 | } |
---|
[60aaa51d] | 1148 | |
---|
| 1149 | |
---|
[0bd3faf] | 1150 | const ast::SingleInit * Resolver::previsit( const ast::SingleInit * singleInit ) { |
---|
[60aaa51d] | 1151 | visit_children = false; |
---|
[ef5b828] | 1152 | // resolve initialization using the possibilities as determined by the `currentObject` |
---|
[60aaa51d] | 1153 | // cursor. |
---|
[ef5b828] | 1154 | ast::ptr< ast::Expr > untyped = new ast::UntypedInitExpr{ |
---|
[60aaa51d] | 1155 | singleInit->location, singleInit->value, currentObject.getOptions() }; |
---|
[3bc69f2] | 1156 | ast::ptr<ast::Expr> newExpr = findSingleExpression( untyped, context ); |
---|
[60aaa51d] | 1157 | const ast::InitExpr * initExpr = newExpr.strict_as< ast::InitExpr >(); |
---|
| 1158 | |
---|
| 1159 | // move cursor to the object that is actually initialized |
---|
| 1160 | currentObject.setNext( initExpr->designation ); |
---|
| 1161 | |
---|
| 1162 | // discard InitExpr wrapper and retain relevant pieces. |
---|
[ef5b828] | 1163 | // `initExpr` may have inferred params in the case where the expression specialized a |
---|
| 1164 | // function pointer, and newExpr may already have inferParams of its own, so a simple |
---|
[60aaa51d] | 1165 | // swap is not sufficient |
---|
| 1166 | ast::Expr::InferUnion inferred = initExpr->inferred; |
---|
| 1167 | swap_and_save_env( newExpr, initExpr->expr ); |
---|
| 1168 | newExpr.get_and_mutate()->inferred.splice( std::move(inferred) ); |
---|
| 1169 | |
---|
[ef5b828] | 1170 | // get the actual object's type (may not exactly match what comes back from the resolver |
---|
[60aaa51d] | 1171 | // due to conversions) |
---|
| 1172 | const ast::Type * initContext = currentObject.getCurrentType(); |
---|
| 1173 | |
---|
[918e4165] | 1174 | removeExtraneousCast( newExpr ); |
---|
[60aaa51d] | 1175 | |
---|
| 1176 | // check if actual object's type is char[] |
---|
| 1177 | if ( auto at = dynamic_cast< const ast::ArrayType * >( initContext ) ) { |
---|
| 1178 | if ( isCharType( at->base ) ) { |
---|
| 1179 | // check if the resolved type is char* |
---|
| 1180 | if ( auto pt = newExpr->result.as< ast::PointerType >() ) { |
---|
| 1181 | if ( isCharType( pt->base ) ) { |
---|
[ef5b828] | 1182 | // strip cast if we're initializing a char[] with a char* |
---|
[60aaa51d] | 1183 | // e.g. char x[] = "hello" |
---|
| 1184 | if ( auto ce = newExpr.as< ast::CastExpr >() ) { |
---|
| 1185 | swap_and_save_env( newExpr, ce->arg ); |
---|
| 1186 | } |
---|
| 1187 | } |
---|
| 1188 | } |
---|
| 1189 | } |
---|
| 1190 | } |
---|
| 1191 | |
---|
| 1192 | // move cursor to next object in preparation for next initializer |
---|
| 1193 | currentObject.increment(); |
---|
| 1194 | |
---|
| 1195 | // set initializer expression to resolved expression |
---|
| 1196 | return ast::mutate_field( singleInit, &ast::SingleInit::value, std::move(newExpr) ); |
---|
[d76c588] | 1197 | } |
---|
| 1198 | |
---|
[0bd3faf] | 1199 | const ast::ListInit * Resolver::previsit( const ast::ListInit * listInit ) { |
---|
[60aaa51d] | 1200 | // move cursor into brace-enclosed initializer-list |
---|
| 1201 | currentObject.enterListInit( listInit->location ); |
---|
| 1202 | |
---|
| 1203 | assert( listInit->designations.size() == listInit->initializers.size() ); |
---|
| 1204 | for ( unsigned i = 0; i < listInit->designations.size(); ++i ) { |
---|
[ef5b828] | 1205 | // iterate designations and initializers in pairs, moving the cursor to the current |
---|
[60aaa51d] | 1206 | // designated object and resolving the initializer against that object |
---|
[2d11663] | 1207 | listInit = ast::mutate_field_index( |
---|
[ef5b828] | 1208 | listInit, &ast::ListInit::designations, i, |
---|
[2d11663] | 1209 | currentObject.findNext( listInit->designations[i] ) ); |
---|
| 1210 | listInit = ast::mutate_field_index( |
---|
| 1211 | listInit, &ast::ListInit::initializers, i, |
---|
| 1212 | listInit->initializers[i]->accept( *visitor ) ); |
---|
[60aaa51d] | 1213 | } |
---|
| 1214 | |
---|
[2d11663] | 1215 | // move cursor out of brace-enclosed initializer-list |
---|
| 1216 | currentObject.exitListInit(); |
---|
| 1217 | |
---|
[60aaa51d] | 1218 | visit_children = false; |
---|
| 1219 | return listInit; |
---|
[d76c588] | 1220 | } |
---|
| 1221 | |
---|
[0bd3faf] | 1222 | const ast::ConstructorInit * Resolver::previsit( const ast::ConstructorInit * ctorInit ) { |
---|
[2d11663] | 1223 | visitor->maybe_accept( ctorInit, &ast::ConstructorInit::ctor ); |
---|
| 1224 | visitor->maybe_accept( ctorInit, &ast::ConstructorInit::dtor ); |
---|
| 1225 | |
---|
| 1226 | // found a constructor - can get rid of C-style initializer |
---|
| 1227 | // xxx - Rob suggests this field is dead code |
---|
| 1228 | ctorInit = ast::mutate_field( ctorInit, &ast::ConstructorInit::init, nullptr ); |
---|
| 1229 | |
---|
[ef5b828] | 1230 | // intrinsic single-parameter constructors and destructors do nothing. Since this was |
---|
| 1231 | // implicitly generated, there's no way for it to have side effects, so get rid of it to |
---|
[2d11663] | 1232 | // clean up generated code |
---|
| 1233 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->ctor ) ) { |
---|
| 1234 | ctorInit = ast::mutate_field( ctorInit, &ast::ConstructorInit::ctor, nullptr ); |
---|
| 1235 | } |
---|
| 1236 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->dtor ) ) { |
---|
| 1237 | ctorInit = ast::mutate_field( ctorInit, &ast::ConstructorInit::dtor, nullptr ); |
---|
| 1238 | } |
---|
| 1239 | |
---|
| 1240 | return ctorInit; |
---|
[d76c588] | 1241 | } |
---|
| 1242 | |
---|
[59c8dff] | 1243 | const ast::EnumPosExpr * Resolver::previsit( const ast::EnumPosExpr * enumPos ) { |
---|
| 1244 | visitor->maybe_accept( enumPos, &ast::EnumPosExpr::expr ); |
---|
| 1245 | return enumPos; |
---|
| 1246 | } |
---|
| 1247 | |
---|
[0dd9a5e] | 1248 | // suppress error on autogen functions and mark invalid autogen as deleted. |
---|
[0bd3faf] | 1249 | bool Resolver::on_error(ast::ptr<ast::Decl> & decl) { |
---|
[0dd9a5e] | 1250 | if (auto functionDecl = decl.as<ast::FunctionDecl>()) { |
---|
| 1251 | // xxx - can intrinsic gen ever fail? |
---|
[6668a3e] | 1252 | if (functionDecl->linkage == ast::Linkage::AutoGen) { |
---|
[0dd9a5e] | 1253 | auto mutDecl = mutate(functionDecl); |
---|
| 1254 | mutDecl->isDeleted = true; |
---|
| 1255 | mutDecl->stmts = nullptr; |
---|
| 1256 | decl = mutDecl; |
---|
| 1257 | return false; |
---|
| 1258 | } |
---|
| 1259 | } |
---|
| 1260 | return true; |
---|
| 1261 | } |
---|
| 1262 | |
---|
[51b7345] | 1263 | } // namespace ResolvExpr |
---|
[a32b204] | 1264 | |
---|
| 1265 | // Local Variables: // |
---|
| 1266 | // tab-width: 4 // |
---|
| 1267 | // mode: c++ // |
---|
| 1268 | // compile-command: "make install" // |
---|
| 1269 | // End: // |
---|