[1931bb01] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2018 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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[11df881] | 7 | // EnumAndPointerDecay.cpp -- Normalizes enumerations and types in functions. |
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[1931bb01] | 8 | // |
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| 9 | // Author : Andrew Beach |
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| 10 | // Created On : Tue Jun 28 15:50:00 2022 |
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| 11 | // Last Modified By : Andrew Beach |
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[e9e9f56] | 12 | // Last Modified On : Tue Sep 20 16:14:00 2022 |
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| 13 | // Update Count : 1 |
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[1931bb01] | 14 | // |
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| 15 | |
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| 16 | #include "EnumAndPointerDecay.hpp" |
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| 17 | |
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| 18 | #include "AST/CVQualifiers.hpp" |
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| 19 | #include "AST/Decl.hpp" |
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| 20 | #include "AST/Pass.hpp" |
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| 21 | #include "AST/Type.hpp" |
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| 22 | #include "SymTab/FixFunction.h" |
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[e874605] | 23 | #include "Validate/NoIdSymbolTable.hpp" |
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[1931bb01] | 24 | |
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| 25 | namespace Validate { |
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| 26 | |
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| 27 | namespace { |
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| 28 | |
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[e874605] | 29 | struct EnumAndPointerDecayCore final : public WithNoIdSymbolTable, public ast::WithCodeLocation { |
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[1931bb01] | 30 | ast::EnumDecl const * previsit( ast::EnumDecl const * decl ); |
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| 31 | ast::FunctionDecl const * previsit( ast::FunctionDecl const * decl ); |
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| 32 | ast::FunctionType const * previsit( ast::FunctionType const * type ); |
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| 33 | }; |
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| 34 | |
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| 35 | ast::EnumDecl const * EnumAndPointerDecayCore::previsit( |
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| 36 | ast::EnumDecl const * decl ) { |
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| 37 | if ( decl->members.empty() ) { |
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| 38 | return decl; |
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| 39 | } |
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| 40 | // Set the type of each member of the enumeration to be EnumContant. |
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| 41 | auto mut = ast::mutate( decl ); |
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[e874605] | 42 | std::vector<ast::ptr<ast::Decl>> buffer; |
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| 43 | for ( auto it = decl->members.begin(); it != decl->members.end(); ++it ) { |
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| 44 | if ( ast::ObjectDecl const * object = (*it).as<ast::ObjectDecl>() ) { |
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| 45 | buffer.push_back( ast::mutate_field( object, &ast::ObjectDecl::type, new ast::EnumInstType( decl, ast::CV::Const ) ) ); |
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| 46 | } else if ( ast::InlineValueDecl const * value = (*it).as<ast::InlineValueDecl>() ) { |
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| 47 | if ( auto targetEnum = symtab.lookupEnum( value->name ) ) { |
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| 48 | for ( auto singleMember : targetEnum->members ) { |
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| 49 | auto copyingMember = singleMember.as<ast::ObjectDecl>(); |
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| 50 | buffer.push_back( new ast::ObjectDecl( |
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| 51 | value->location, // use the "inline" location |
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| 52 | copyingMember->name, |
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| 53 | new ast::EnumInstType( decl, ast::CV::Const ), |
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| 54 | // Construct a new EnumInstType as the type |
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| 55 | copyingMember->init, |
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| 56 | copyingMember->storage, |
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| 57 | copyingMember->linkage, |
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| 58 | copyingMember->bitfieldWidth, |
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| 59 | {}, |
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| 60 | copyingMember->funcSpec |
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| 61 | ) ); |
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| 62 | } |
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| 63 | } |
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| 64 | } |
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[1931bb01] | 65 | } |
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[e874605] | 66 | mut->members = buffer; |
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[1931bb01] | 67 | return mut; |
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| 68 | } |
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| 69 | |
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| 70 | template<typename Member> |
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| 71 | void fixFunctionList( CodeLocation const & location, bool isVarArgs, |
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| 72 | std::vector<ast::ptr<Member>> & list ) { |
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| 73 | bool hasVoid = false; |
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| 74 | for ( ast::ptr<Member> & member : list ) { |
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| 75 | member = SymTab::fixFunction( member, hasVoid ); |
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| 76 | } |
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| 77 | |
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| 78 | // The remaining code only applies if void is present. |
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| 79 | if ( !hasVoid ) { |
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| 80 | return; |
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| 81 | } |
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| 82 | |
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| 83 | // So there is a void, which is only valid if it is the only argument. |
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| 84 | if ( 1 < list.size() || isVarArgs ) { |
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| 85 | SemanticError( location, "invalid type void in function type " ); |
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| 86 | } |
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| 87 | |
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| 88 | // If a single "void" thing in the list to remove it. |
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| 89 | list.clear(); |
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| 90 | } |
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| 91 | |
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| 92 | ast::FunctionDecl const * EnumAndPointerDecayCore::previsit( |
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| 93 | ast::FunctionDecl const * decl ) { |
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| 94 | auto mut = ast::mutate( decl ); |
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| 95 | ast::ArgumentFlag isVarArgs = mut->type->isVarArgs; |
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| 96 | // It seems fixFunction (via fixFunctionList) does the pointer decay part. |
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| 97 | fixFunctionList( mut->location, isVarArgs, mut->params ); |
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| 98 | fixFunctionList( mut->location, false, mut->returns ); |
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| 99 | return mut; |
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| 100 | } |
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| 101 | |
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| 102 | ast::FunctionType const * EnumAndPointerDecayCore::previsit( |
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| 103 | ast::FunctionType const * type ) { |
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| 104 | assert( location ); |
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| 105 | auto mut = ast::mutate( type ); |
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| 106 | ast::ArgumentFlag isVarArgs = mut->isVarArgs; |
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| 107 | // It seems fixFunction (via fixFunctionList) does the pointer decay part. |
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| 108 | fixFunctionList( *location, isVarArgs, mut->params ); |
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| 109 | fixFunctionList( *location, false, mut->returns ); |
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| 110 | return mut; |
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| 111 | } |
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| 112 | |
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| 113 | } // namespace |
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| 114 | |
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| 115 | void decayEnumsAndPointers( ast::TranslationUnit & translationUnit ) { |
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| 116 | ast::Pass<EnumAndPointerDecayCore>::run( translationUnit ); |
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| 117 | } |
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| 118 | |
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| 119 | } // namespace Validate |
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| 120 | |
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| 121 | // Local Variables: // |
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| 122 | // tab-width: 4 // |
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| 123 | // mode: c++ // |
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| 124 | // compile-command: "make install" // |
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| 125 | // End: // |
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