[04124c4] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2019 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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| 7 | // Pass.hpp -- |
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| 8 | // |
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| 9 | // Author : Thierry Delisle |
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[a86b2ca6] | 10 | // Created On : Thu May 09 15:37:05 2019 |
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[04124c4] | 11 | // Last Modified By : |
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| 12 | // Last Modified On : |
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| 13 | // Update Count : |
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| 14 | // |
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| 15 | |
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[f47f887] | 16 | #pragma once |
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[04124c4] | 17 | // IWYU pragma: private, include "AST/Pass.hpp" |
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[f47f887] | 18 | |
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| 19 | #include <functional> |
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| 20 | #include <list> |
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| 21 | #include <stack> |
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| 22 | |
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[04124c4] | 23 | #include "AST/Fwd.hpp" |
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| 24 | #include "AST/Node.hpp" |
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[6d51bd7] | 25 | |
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| 26 | #include "AST/Attribute.hpp" |
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[04124c4] | 27 | #include "AST/Decl.hpp" |
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[6d51bd7] | 28 | #include "AST/Expr.hpp" |
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| 29 | #include "AST/Init.hpp" |
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| 30 | #include "AST/Stmt.hpp" |
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[8a5530c] | 31 | #include "AST/Type.hpp" |
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[6d51bd7] | 32 | |
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[04124c4] | 33 | #include "AST/Visitor.hpp" |
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| 34 | |
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[0e42794] | 35 | #include "AST/SymbolTable.hpp" |
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[f47f887] | 36 | |
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[e0e9a0b] | 37 | #include "AST/ForallSubstitutionTable.hpp" |
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| 38 | |
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[f47f887] | 39 | // Private prelude header, needed for some of the magic tricks this class pulls off |
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[04124c4] | 40 | #include "AST/Pass.proto.hpp" |
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[f47f887] | 41 | |
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| 42 | namespace ast { |
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| 43 | //------------------------------------------------------------------------------------------------- |
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| 44 | // Templated visitor type |
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| 45 | // To use declare a Pass< YOUR VISITOR TYPE > |
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| 46 | // The visitor type should specify the previsit/postvisit for types that are desired. |
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| 47 | // Note: previsit/postvisit must be **public** members |
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| 48 | // |
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| 49 | // Several additional features are available through inheritance |
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[e0e9a0b] | 50 | // | WithTypeSubstitution - provides polymorphic const TypeSubstitution * env for the |
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| 51 | // current expression |
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| 52 | // | WithStmtsToAdd - provides the ability to insert statements before or after the current |
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| 53 | // statement by adding new statements into stmtsToAddBefore or |
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| 54 | // stmtsToAddAfter respectively. |
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| 55 | // | WithDeclsToAdd - provides the ability to insert declarations before or after the |
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| 56 | // current declarations by adding new DeclStmt into declsToAddBefore or |
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| 57 | // declsToAddAfter respectively. |
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| 58 | // | WithShortCircuiting - provides the ability to skip visiting child nodes; set visit_children |
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| 59 | // to false in pre{visit,visit} to skip visiting children |
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| 60 | // | WithGuards - provides the ability to save/restore data like a LIFO stack; to save, |
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| 61 | // call GuardValue with the variable to save, the variable will |
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| 62 | // automatically be restored to its previous value after the |
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| 63 | // corresponding postvisit/postmutate teminates. |
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| 64 | // | WithVisitorRef - provides an pointer to the templated visitor wrapper |
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| 65 | // | WithSymbolTable - provides symbol table functionality |
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| 66 | // | WithForallSubstitutor - maintains links between TypeInstType and TypeDecl under mutation |
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[f47f887] | 67 | //------------------------------------------------------------------------------------------------- |
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[7ff3e522] | 68 | template< typename core_t > |
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[f47f887] | 69 | class Pass final : public ast::Visitor { |
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| 70 | public: |
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[7ff3e522] | 71 | using core_type = core_t; |
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| 72 | using type = Pass<core_t>; |
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| 73 | |
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[04124c4] | 74 | /// Forward any arguments to the pass constructor |
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| 75 | /// Propagate 'this' if necessary |
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[f47f887] | 76 | template< typename... Args > |
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| 77 | Pass( Args &&... args) |
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[7ff3e522] | 78 | : core( std::forward<Args>( args )... ) |
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[f47f887] | 79 | { |
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| 80 | // After the pass is constructed, check if it wants the have a pointer to the wrapping visitor |
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[7ff3e522] | 81 | type * const * visitor = __pass::visitor(core, 0); |
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[f47f887] | 82 | if(visitor) { |
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[7ff3e522] | 83 | *const_cast<type **>( visitor ) = this; |
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[f47f887] | 84 | } |
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| 85 | } |
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| 86 | |
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| 87 | virtual ~Pass() = default; |
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| 88 | |
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[a86b2ca6] | 89 | /// Construct and run a pass on a translation unit. |
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| 90 | template< typename... Args > |
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| 91 | static void run( std::list< ptr<Decl> > & decls, Args &&... args ) { |
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[7ff3e522] | 92 | Pass<core_t> visitor( std::forward<Args>( args )... ); |
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[a86b2ca6] | 93 | accept_all( decls, visitor ); |
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| 94 | } |
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| 95 | |
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[0240cd69] | 96 | template< typename... Args > |
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| 97 | static void run( std::list< ptr<Decl> > & decls ) { |
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| 98 | Pass<core_t> visitor; |
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| 99 | accept_all( decls, visitor ); |
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| 100 | } |
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| 101 | |
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[04124c4] | 102 | /// Storage for the actual pass |
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[7ff3e522] | 103 | core_t core; |
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[f47f887] | 104 | |
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[04124c4] | 105 | /// Visit function declarations |
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[23f99e1] | 106 | const ast::DeclWithType * visit( const ast::ObjectDecl * ) override final; |
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| 107 | const ast::DeclWithType * visit( const ast::FunctionDecl * ) override final; |
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| 108 | const ast::Decl * visit( const ast::StructDecl * ) override final; |
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| 109 | const ast::Decl * visit( const ast::UnionDecl * ) override final; |
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| 110 | const ast::Decl * visit( const ast::EnumDecl * ) override final; |
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| 111 | const ast::Decl * visit( const ast::TraitDecl * ) override final; |
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| 112 | const ast::Decl * visit( const ast::TypeDecl * ) override final; |
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| 113 | const ast::Decl * visit( const ast::TypedefDecl * ) override final; |
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| 114 | const ast::AsmDecl * visit( const ast::AsmDecl * ) override final; |
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| 115 | const ast::StaticAssertDecl * visit( const ast::StaticAssertDecl * ) override final; |
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| 116 | const ast::CompoundStmt * visit( const ast::CompoundStmt * ) override final; |
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| 117 | const ast::Stmt * visit( const ast::ExprStmt * ) override final; |
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| 118 | const ast::Stmt * visit( const ast::AsmStmt * ) override final; |
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| 119 | const ast::Stmt * visit( const ast::DirectiveStmt * ) override final; |
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| 120 | const ast::Stmt * visit( const ast::IfStmt * ) override final; |
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| 121 | const ast::Stmt * visit( const ast::WhileStmt * ) override final; |
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| 122 | const ast::Stmt * visit( const ast::ForStmt * ) override final; |
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| 123 | const ast::Stmt * visit( const ast::SwitchStmt * ) override final; |
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| 124 | const ast::Stmt * visit( const ast::CaseStmt * ) override final; |
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| 125 | const ast::Stmt * visit( const ast::BranchStmt * ) override final; |
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| 126 | const ast::Stmt * visit( const ast::ReturnStmt * ) override final; |
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| 127 | const ast::Stmt * visit( const ast::ThrowStmt * ) override final; |
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| 128 | const ast::Stmt * visit( const ast::TryStmt * ) override final; |
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| 129 | const ast::Stmt * visit( const ast::CatchStmt * ) override final; |
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| 130 | const ast::Stmt * visit( const ast::FinallyStmt * ) override final; |
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[37cdd97] | 131 | const ast::Stmt * visit( const ast::SuspendStmt * ) override final; |
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[23f99e1] | 132 | const ast::Stmt * visit( const ast::WaitForStmt * ) override final; |
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[e67991f] | 133 | const ast::Decl * visit( const ast::WithStmt * ) override final; |
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[23f99e1] | 134 | const ast::NullStmt * visit( const ast::NullStmt * ) override final; |
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| 135 | const ast::Stmt * visit( const ast::DeclStmt * ) override final; |
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| 136 | const ast::Stmt * visit( const ast::ImplicitCtorDtorStmt * ) override final; |
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| 137 | const ast::Expr * visit( const ast::ApplicationExpr * ) override final; |
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| 138 | const ast::Expr * visit( const ast::UntypedExpr * ) override final; |
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| 139 | const ast::Expr * visit( const ast::NameExpr * ) override final; |
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| 140 | const ast::Expr * visit( const ast::AddressExpr * ) override final; |
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| 141 | const ast::Expr * visit( const ast::LabelAddressExpr * ) override final; |
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| 142 | const ast::Expr * visit( const ast::CastExpr * ) override final; |
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| 143 | const ast::Expr * visit( const ast::KeywordCastExpr * ) override final; |
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| 144 | const ast::Expr * visit( const ast::VirtualCastExpr * ) override final; |
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| 145 | const ast::Expr * visit( const ast::UntypedMemberExpr * ) override final; |
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| 146 | const ast::Expr * visit( const ast::MemberExpr * ) override final; |
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| 147 | const ast::Expr * visit( const ast::VariableExpr * ) override final; |
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| 148 | const ast::Expr * visit( const ast::ConstantExpr * ) override final; |
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| 149 | const ast::Expr * visit( const ast::SizeofExpr * ) override final; |
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| 150 | const ast::Expr * visit( const ast::AlignofExpr * ) override final; |
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| 151 | const ast::Expr * visit( const ast::UntypedOffsetofExpr * ) override final; |
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| 152 | const ast::Expr * visit( const ast::OffsetofExpr * ) override final; |
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| 153 | const ast::Expr * visit( const ast::OffsetPackExpr * ) override final; |
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| 154 | const ast::Expr * visit( const ast::LogicalExpr * ) override final; |
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| 155 | const ast::Expr * visit( const ast::ConditionalExpr * ) override final; |
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| 156 | const ast::Expr * visit( const ast::CommaExpr * ) override final; |
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| 157 | const ast::Expr * visit( const ast::TypeExpr * ) override final; |
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| 158 | const ast::Expr * visit( const ast::AsmExpr * ) override final; |
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| 159 | const ast::Expr * visit( const ast::ImplicitCopyCtorExpr * ) override final; |
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| 160 | const ast::Expr * visit( const ast::ConstructorExpr * ) override final; |
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| 161 | const ast::Expr * visit( const ast::CompoundLiteralExpr * ) override final; |
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| 162 | const ast::Expr * visit( const ast::RangeExpr * ) override final; |
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| 163 | const ast::Expr * visit( const ast::UntypedTupleExpr * ) override final; |
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| 164 | const ast::Expr * visit( const ast::TupleExpr * ) override final; |
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| 165 | const ast::Expr * visit( const ast::TupleIndexExpr * ) override final; |
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| 166 | const ast::Expr * visit( const ast::TupleAssignExpr * ) override final; |
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| 167 | const ast::Expr * visit( const ast::StmtExpr * ) override final; |
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| 168 | const ast::Expr * visit( const ast::UniqueExpr * ) override final; |
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| 169 | const ast::Expr * visit( const ast::UntypedInitExpr * ) override final; |
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| 170 | const ast::Expr * visit( const ast::InitExpr * ) override final; |
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| 171 | const ast::Expr * visit( const ast::DeletedExpr * ) override final; |
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| 172 | const ast::Expr * visit( const ast::DefaultArgExpr * ) override final; |
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| 173 | const ast::Expr * visit( const ast::GenericExpr * ) override final; |
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| 174 | const ast::Type * visit( const ast::VoidType * ) override final; |
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| 175 | const ast::Type * visit( const ast::BasicType * ) override final; |
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| 176 | const ast::Type * visit( const ast::PointerType * ) override final; |
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| 177 | const ast::Type * visit( const ast::ArrayType * ) override final; |
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| 178 | const ast::Type * visit( const ast::ReferenceType * ) override final; |
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| 179 | const ast::Type * visit( const ast::QualifiedType * ) override final; |
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| 180 | const ast::Type * visit( const ast::FunctionType * ) override final; |
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| 181 | const ast::Type * visit( const ast::StructInstType * ) override final; |
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| 182 | const ast::Type * visit( const ast::UnionInstType * ) override final; |
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| 183 | const ast::Type * visit( const ast::EnumInstType * ) override final; |
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| 184 | const ast::Type * visit( const ast::TraitInstType * ) override final; |
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| 185 | const ast::Type * visit( const ast::TypeInstType * ) override final; |
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| 186 | const ast::Type * visit( const ast::TupleType * ) override final; |
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| 187 | const ast::Type * visit( const ast::TypeofType * ) override final; |
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| 188 | const ast::Type * visit( const ast::VarArgsType * ) override final; |
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| 189 | const ast::Type * visit( const ast::ZeroType * ) override final; |
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| 190 | const ast::Type * visit( const ast::OneType * ) override final; |
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| 191 | const ast::Type * visit( const ast::GlobalScopeType * ) override final; |
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| 192 | const ast::Designation * visit( const ast::Designation * ) override final; |
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| 193 | const ast::Init * visit( const ast::SingleInit * ) override final; |
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| 194 | const ast::Init * visit( const ast::ListInit * ) override final; |
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| 195 | const ast::Init * visit( const ast::ConstructorInit * ) override final; |
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| 196 | const ast::Attribute * visit( const ast::Attribute * ) override final; |
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| 197 | const ast::TypeSubstitution * visit( const ast::TypeSubstitution * ) override final; |
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[f47f887] | 198 | |
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[7ff3e522] | 199 | template<typename core_type> |
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| 200 | friend void accept_all( std::list< ptr<Decl> > & decls, Pass<core_type>& visitor ); |
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[f47f887] | 201 | private: |
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| 202 | |
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[7ff3e522] | 203 | bool __visit_children() { __pass::bool_ref * ptr = __pass::visit_children(core, 0); return ptr ? *ptr : true; } |
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[f47f887] | 204 | |
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| 205 | private: |
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[6d51bd7] | 206 | const ast::Stmt * call_accept( const ast::Stmt * ); |
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| 207 | const ast::Expr * call_accept( const ast::Expr * ); |
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[f47f887] | 208 | |
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[6d51bd7] | 209 | template< typename node_t > |
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[8a5530c] | 210 | auto call_accept( const node_t * node ) -> typename std::enable_if< |
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| 211 | !std::is_base_of<ast::Expr, node_t>::value && |
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| 212 | !std::is_base_of<ast::Stmt, node_t>::value |
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| 213 | , decltype( node->accept(*this) ) |
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| 214 | >::type; |
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[f47f887] | 215 | |
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[6d51bd7] | 216 | template< template <class...> class container_t > |
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[04124c4] | 217 | container_t< ptr<Stmt> > call_accept( const container_t< ptr<Stmt> > & ); |
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[f47f887] | 218 | |
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[6d51bd7] | 219 | template< template <class...> class container_t, typename node_t > |
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[04124c4] | 220 | container_t< ptr<node_t> > call_accept( const container_t< ptr<node_t> > & container ); |
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[f47f887] | 221 | |
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[e0e9a0b] | 222 | /// Mutate forall-list, accounting for presence of type substitution map |
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| 223 | template<typename node_t> |
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| 224 | void mutate_forall( const node_t *& ); |
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| 225 | |
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[2b59f55] | 226 | public: |
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[6d51bd7] | 227 | /// Logic to call the accept and mutate the parent if needed, delegates call to accept |
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| 228 | template<typename node_t, typename parent_t, typename child_t> |
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| 229 | void maybe_accept(const node_t * &, child_t parent_t::* child); |
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| 230 | |
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[f47f887] | 231 | private: |
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[0e42794] | 232 | /// Internal RAII guard for symbol table features |
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| 233 | struct guard_symtab { |
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[7ff3e522] | 234 | guard_symtab( Pass<core_t> & pass ): pass( pass ) { __pass::symtab::enter(pass.core, 0); } |
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| 235 | ~guard_symtab() { __pass::symtab::leave(pass.core, 0); } |
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| 236 | Pass<core_t> & pass; |
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[f47f887] | 237 | }; |
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| 238 | |
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[04124c4] | 239 | /// Internal RAII guard for scope features |
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| 240 | struct guard_scope { |
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[7ff3e522] | 241 | guard_scope( Pass<core_t> & pass ): pass( pass ) { __pass::scope::enter(pass.core, 0); } |
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| 242 | ~guard_scope() { __pass::scope::leave(pass.core, 0); } |
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| 243 | Pass<core_t> & pass; |
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[f47f887] | 244 | }; |
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[23f99e1] | 245 | |
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[e0e9a0b] | 246 | /// Internal RAII guard for forall substitutions |
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| 247 | struct guard_forall_subs { |
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[7ff3e522] | 248 | guard_forall_subs( Pass<core_t> & pass, const ParameterizedType * type ) |
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| 249 | : pass( pass ), type( type ) { __pass::forall::enter(pass.core, 0, type ); } |
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| 250 | ~guard_forall_subs() { __pass::forall::leave(pass.core, 0, type ); } |
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| 251 | Pass<core_t> & pass; |
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[e0e9a0b] | 252 | const ParameterizedType * type; |
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| 253 | }; |
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| 254 | |
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[23f99e1] | 255 | private: |
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| 256 | bool inFunction = false; |
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[f47f887] | 257 | }; |
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| 258 | |
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[d8938622] | 259 | /// Apply a pass to an entire translation unit |
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[7ff3e522] | 260 | template<typename core_t> |
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| 261 | void accept_all( std::list< ast::ptr<ast::Decl> > &, ast::Pass<core_t> & visitor ); |
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[f47f887] | 262 | |
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[04124c4] | 263 | //------------------------------------------------------------------------------------------------- |
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[f47f887] | 264 | // PASS ACCESSORIES |
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[04124c4] | 265 | //------------------------------------------------------------------------------------------------- |
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[f47f887] | 266 | |
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[04124c4] | 267 | /// Keep track of the polymorphic const TypeSubstitution * env for the current expression |
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[d3aa64f1] | 268 | |
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| 269 | /// marker to force shallow copies in pass visit |
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| 270 | struct PureVisitor {}; |
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| 271 | |
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[04124c4] | 272 | struct WithConstTypeSubstitution { |
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| 273 | const TypeSubstitution * env = nullptr; |
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| 274 | }; |
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| 275 | |
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| 276 | /// Used if visitor requires added statements before or after the current node. |
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| 277 | /// The Pass template handles what *before* and *after* means automatically |
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[6d51bd7] | 278 | template< template<class...> class container_t = std::list > |
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[f47f887] | 279 | struct WithStmtsToAdd { |
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[04124c4] | 280 | container_t< ptr<Stmt> > stmtsToAddBefore; |
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| 281 | container_t< ptr<Stmt> > stmtsToAddAfter; |
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[f47f887] | 282 | }; |
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| 283 | |
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[04124c4] | 284 | /// Used if visitor requires added declarations before or after the current node. |
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| 285 | /// The Pass template handles what *before* and *after* means automatically |
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[6d51bd7] | 286 | template< template<class...> class container_t = std::list > |
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[f47f887] | 287 | struct WithDeclsToAdd { |
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[04124c4] | 288 | container_t< ptr<Decl> > declsToAddBefore; |
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| 289 | container_t< ptr<Decl> > declsToAddAfter; |
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[f47f887] | 290 | }; |
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| 291 | |
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[04124c4] | 292 | /// Use if visitation should stop at certain levels |
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| 293 | /// set visit_children false of all child nodes should be ignored |
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[f47f887] | 294 | struct WithShortCircuiting { |
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| 295 | __pass::bool_ref visit_children; |
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| 296 | }; |
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| 297 | |
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[04124c4] | 298 | /// Used to restore values/functions/etc. when the Pass finishes visiting this node |
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| 299 | class WithGuards { |
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[e16e27e1] | 300 | __pass::at_cleanup_t at_cleanup = [](__pass::cleanup_func_t, void*) { |
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| 301 | std::cerr << "No cleanup function was set" << std::endl; |
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| 302 | abort(); |
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| 303 | }; |
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[f47f887] | 304 | |
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[7ff3e522] | 305 | template< typename core_t> |
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| 306 | friend auto __pass::at_cleanup( core_t & core, int ) -> decltype( &core.at_cleanup ); |
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[04124c4] | 307 | public: |
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[e16e27e1] | 308 | |
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[04124c4] | 309 | /// When this node is finished being visited, restore the value of a variable |
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| 310 | template< typename T > |
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| 311 | void GuardValue( T& val ) { |
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| 312 | at_cleanup( [ val ]( void * newVal ) { |
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| 313 | * static_cast< T * >( newVal ) = val; |
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| 314 | }, static_cast< void * >( & val ) ); |
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| 315 | } |
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[f47f887] | 316 | |
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[04124c4] | 317 | /// On the object, all beginScope now and endScope when the current node is finished being visited |
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| 318 | template< typename T > |
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| 319 | void GuardScope( T& val ) { |
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| 320 | val.beginScope(); |
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| 321 | at_cleanup( []( void * val ) { |
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| 322 | static_cast< T * >( val )->endScope(); |
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| 323 | }, static_cast< void * >( & val ) ); |
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| 324 | } |
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[f47f887] | 325 | |
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[04124c4] | 326 | /// When this node is finished being visited, call a function |
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| 327 | template< typename Func > |
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| 328 | void GuardAction( Func func ) { |
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| 329 | at_cleanup( [func](void *) { func(); }, nullptr ); |
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| 330 | } |
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[be8518f] | 331 | |
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| 332 | /// When this node is finished being visited, call a member of an object. |
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| 333 | template<typename T> |
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| 334 | void GuardMethod( T * obj, void (T::*method)() ) { |
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| 335 | at_cleanup( [ method ]( void * object ) { |
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| 336 | static_cast< T * >( object )->method(); |
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| 337 | }, static_cast< void * >( obj ) ); |
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| 338 | } |
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[04124c4] | 339 | }; |
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[f47f887] | 340 | |
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[04124c4] | 341 | /// Used to get a pointer to the pass with its wrapped type |
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[7ff3e522] | 342 | template<typename core_t> |
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[04124c4] | 343 | struct WithVisitorRef { |
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[7ff3e522] | 344 | Pass<core_t> * const visitor = nullptr; |
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[04124c4] | 345 | }; |
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[f47f887] | 346 | |
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[0e42794] | 347 | /// Use when the templated visitor should update the symbol table |
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| 348 | struct WithSymbolTable { |
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| 349 | SymbolTable symtab; |
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[f47f887] | 350 | }; |
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[e0e9a0b] | 351 | |
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| 352 | /// Use when the templated visitor needs to keep TypeInstType instances properly linked to TypeDecl |
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| 353 | struct WithForallSubstitutor { |
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| 354 | ForallSubstitutionTable subs; |
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| 355 | }; |
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| 356 | |
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[6d51bd7] | 357 | } |
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| 358 | |
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| 359 | #include "Common/Stats.h" |
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| 360 | |
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[172d9342] | 361 | namespace ast { |
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[6d51bd7] | 362 | extern struct PassVisitorStats { |
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| 363 | size_t depth = 0; |
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[c408483] | 364 | Stats::Counters::MaxCounter<double> * max; |
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| 365 | Stats::Counters::AverageCounter<double> * avg; |
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[6d51bd7] | 366 | } pass_visitor_stats; |
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[172d9342] | 367 | } |
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[6d51bd7] | 368 | |
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[be8518f] | 369 | #include "AST/Pass.impl.hpp" |
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