[e4d829b] | 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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| 7 | // CurrentObject.h -- |
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| 8 | // |
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| 9 | // Author : Rob Schluntz |
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| 10 | // Created On : Tue Jun 13 15:28:32 2017 |
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| 11 | // Last Modified By : Rob Schluntz |
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| 12 | // Last Modified On : Tue Jun 13 15:28:44 2017 |
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| 13 | // Update Count : 2 |
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| 14 | // |
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| 15 | |
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[ea6332d] | 16 | #include <stddef.h> // for size_t |
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| 17 | #include <cassert> // for assertf, assert, safe_dynamic_... |
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[60aaa51d] | 18 | #include <deque> |
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[ea6332d] | 19 | #include <iostream> // for ostream, operator<<, basic_ost... |
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| 20 | #include <stack> // for stack |
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| 21 | #include <string> // for string, operator<<, allocator |
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[e4d829b] | 22 | |
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[8e1467d] | 23 | #include "AST/Copy.hpp" // for shallowCopy |
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[2b59f55] | 24 | #include "AST/Expr.hpp" // for InitAlternative |
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[60aaa51d] | 25 | #include "AST/GenericSubstitution.hpp" // for genericSubstitution |
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[2b59f55] | 26 | #include "AST/Init.hpp" // for Designation |
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| 27 | #include "AST/Node.hpp" // for readonly |
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[2890212] | 28 | #include "AST/Print.hpp" // for readonly |
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[60aaa51d] | 29 | #include "AST/Type.hpp" |
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[ea6332d] | 30 | #include "Common/Indenter.h" // for Indenter, operator<< |
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| 31 | #include "Common/SemanticError.h" // for SemanticError |
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| 32 | #include "Common/utility.h" // for toString |
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[e4d829b] | 33 | #include "CurrentObject.h" |
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[ea6332d] | 34 | #include "SynTree/Constant.h" // for Constant |
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| 35 | #include "SynTree/Declaration.h" // for ObjectDecl, Declaration, Struc... |
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| 36 | #include "SynTree/Expression.h" // for InitAlternative, VariableExpr |
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| 37 | #include "SynTree/Initializer.h" // for Designation, operator<< |
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| 38 | #include "SynTree/Type.h" // for Type, StructInstType, UnionIns... |
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| 39 | #include "SynTree/TypeSubstitution.h" // for TypeSubstitution |
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[e4d829b] | 40 | |
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| 41 | #if 0 |
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| 42 | #define PRINT(x) x |
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| 43 | #else |
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| 44 | #define PRINT(x) |
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| 45 | #endif |
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| 46 | |
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| 47 | namespace ResolvExpr { |
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[62423350] | 48 | template< typename AggrInst > |
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| 49 | TypeSubstitution makeGenericSubstitution( AggrInst * inst ) { |
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| 50 | assert( inst ); |
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| 51 | assert( inst->get_baseParameters() ); |
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| 52 | std::list< TypeDecl * > baseParams = *inst->get_baseParameters(); |
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| 53 | std::list< Expression * > typeSubs = inst->get_parameters(); |
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| 54 | TypeSubstitution subs( baseParams.begin(), baseParams.end(), typeSubs.begin() ); |
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| 55 | return subs; |
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| 56 | } |
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| 57 | |
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| 58 | TypeSubstitution makeGenericSubstitution( Type * type ) { |
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| 59 | if ( StructInstType * inst = dynamic_cast< StructInstType * >( type ) ) { |
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| 60 | return makeGenericSubstitution( inst ); |
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| 61 | } else if ( UnionInstType * inst = dynamic_cast< UnionInstType * >( type ) ) { |
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| 62 | return makeGenericSubstitution( inst ); |
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| 63 | } else { |
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| 64 | return TypeSubstitution(); |
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| 65 | } |
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| 66 | } |
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| 67 | |
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[e4d829b] | 68 | class MemberIterator { |
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| 69 | public: |
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| 70 | virtual ~MemberIterator() {} |
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| 71 | |
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[84e8423] | 72 | /// walks the current object using the given designators as a guide |
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[e4d829b] | 73 | virtual void setPosition( std::list< Expression * > & designators ) = 0; |
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[84e8423] | 74 | |
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[1df492a] | 75 | /// retrieve the list of possible Type/Designation pairs for the current position in the currect object |
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[e4d829b] | 76 | virtual std::list<InitAlternative> operator*() const = 0; |
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[84e8423] | 77 | |
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| 78 | /// true if the iterator is not currently at the end |
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[e4d829b] | 79 | virtual operator bool() const = 0; |
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[84e8423] | 80 | |
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| 81 | /// moves the iterator by one member in the current object |
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[e4d829b] | 82 | virtual MemberIterator & bigStep() = 0; |
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[84e8423] | 83 | |
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| 84 | /// moves the iterator by one member in the current subobject |
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[e4d829b] | 85 | virtual MemberIterator & smallStep() = 0; |
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[84e8423] | 86 | |
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| 87 | /// the type of the current object |
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[e4d829b] | 88 | virtual Type * getType() = 0; |
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[84e8423] | 89 | |
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| 90 | /// the type of the current subobject |
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[e4d829b] | 91 | virtual Type * getNext() = 0; |
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| 92 | |
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[84e8423] | 93 | /// printing for debug |
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[e4d829b] | 94 | virtual void print( std::ostream & out, Indenter indent ) const = 0; |
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| 95 | |
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[84e8423] | 96 | /// helper for operator*; aggregates must add designator to each init alternative, but |
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| 97 | /// adding designators in operator* creates duplicates. |
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[e4d829b] | 98 | virtual std::list<InitAlternative> first() const = 0; // should be protected |
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| 99 | }; |
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| 100 | |
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| 101 | std::ostream & operator<<(std::ostream & out, const MemberIterator & it) { |
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| 102 | Indenter indenter; |
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| 103 | it.print( out, indenter ); |
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| 104 | return out; |
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| 105 | } |
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| 106 | |
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| 107 | /// create a new MemberIterator that traverses a type correctly |
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| 108 | MemberIterator * createMemberIterator( Type * type ); |
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| 109 | |
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| 110 | /// iterates "other" types, e.g. basic types, pointer types, etc. which do not change at list initializer entry |
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| 111 | class SimpleIterator : public MemberIterator { |
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| 112 | public: |
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| 113 | SimpleIterator( Type * type ) : type( type ) {} |
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| 114 | |
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| 115 | virtual void setPosition( std::list< Expression * > & designators ) { |
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| 116 | assertf( designators.empty(), "simple iterator given non-empty designator..." ); // xxx - might be semantic error |
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| 117 | } |
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| 118 | |
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| 119 | virtual std::list<InitAlternative> operator*() const { return first(); } |
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| 120 | virtual operator bool() const { return type; } |
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| 121 | |
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| 122 | // big step is the same as small step |
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| 123 | virtual MemberIterator & bigStep() { return smallStep(); } |
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| 124 | virtual MemberIterator & smallStep() { |
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| 125 | type = nullptr; // type is nullified on increment since SimpleIterators do not have members |
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| 126 | return *this; |
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| 127 | } |
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| 128 | |
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[9ff56e7] | 129 | virtual void print( std::ostream & out, __attribute__((unused)) Indenter indent ) const { |
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[e4d829b] | 130 | out << "SimpleIterator(" << type << ")"; |
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| 131 | } |
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| 132 | |
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| 133 | virtual Type * getType() { return type; } |
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| 134 | virtual Type * getNext() { return type; } |
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| 135 | |
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| 136 | protected: |
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| 137 | virtual std::list<InitAlternative> first() const { |
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| 138 | if ( type ) return std::list<InitAlternative>{ { type->clone(), new Designation( {} ) } }; |
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| 139 | else return std::list<InitAlternative>{}; |
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| 140 | } |
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| 141 | private: |
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| 142 | Type * type = nullptr; |
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| 143 | }; |
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| 144 | |
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| 145 | class ArrayIterator : public MemberIterator { |
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| 146 | public: |
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| 147 | ArrayIterator( ArrayType * at ) : array( at ) { |
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| 148 | PRINT( std::cerr << "Creating array iterator: " << at << std::endl; ) |
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[f072892] | 149 | base = at->base; |
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[e4d829b] | 150 | memberIter = createMemberIterator( base ); |
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[f072892] | 151 | if ( at->isVarLen ) SemanticError( at, "VLA initialization does not support @=: " ); |
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| 152 | setSize( at->dimension ); |
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[e4d829b] | 153 | } |
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| 154 | |
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| 155 | ~ArrayIterator() { |
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| 156 | delete memberIter; |
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| 157 | } |
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| 158 | |
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| 159 | private: |
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[ba4a1d8] | 160 | void setSize( Expression * expr ) { // replace this logic with an eval call |
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| 161 | auto res = eval(expr); |
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| 162 | if (res.second) { |
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| 163 | size = res.first; |
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[e4d829b] | 164 | } else { |
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[ba4a1d8] | 165 | SemanticError( expr->location, toString("Array designator must be a constant expression: ", expr) ); |
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[e4d829b] | 166 | } |
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| 167 | } |
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| 168 | |
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| 169 | public: |
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| 170 | void setPosition( Expression * expr ) { |
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| 171 | // need to permit integer-constant-expressions, including: integer constants, enumeration constants, character constants, sizeof expressions, _Alignof expressions, cast expressions |
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| 172 | if ( ConstantExpr * constExpr = dynamic_cast< ConstantExpr * >( expr ) ) { |
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[4b97770] | 173 | try { |
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| 174 | index = constExpr->intValue(); |
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[a16764a6] | 175 | } catch( SemanticErrorException & ) { |
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| 176 | SemanticError( expr, "Constant expression of non-integral type in array designator: " ); |
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[4b97770] | 177 | } |
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[e4d829b] | 178 | } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) { |
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| 179 | setPosition( castExpr->get_arg() ); |
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| 180 | } else if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( expr ) ) { |
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[f64d9bc] | 181 | EnumInstType * inst = dynamic_cast<EnumInstType *>( varExpr->get_result() ); |
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| 182 | assertf( inst, "ArrayIterator given variable that isn't an enum constant : %s", toString( expr ).c_str() ); |
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| 183 | long long int value; |
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| 184 | if ( inst->baseEnum->valueOf( varExpr->var, value ) ) { |
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| 185 | index = value; |
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| 186 | } |
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[e4d829b] | 187 | } else if ( dynamic_cast< SizeofExpr * >( expr ) || dynamic_cast< AlignofExpr * >( expr ) ) { |
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| 188 | index = 0; // xxx - get actual sizeof/alignof value? |
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| 189 | } else { |
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| 190 | assertf( false, "bad designator given to ArrayIterator: %s", toString( expr ).c_str() ); |
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| 191 | } |
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| 192 | } |
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| 193 | |
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| 194 | virtual void setPosition( std::list< Expression * > & designators ) { |
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| 195 | if ( ! designators.empty() ) { |
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| 196 | setPosition( designators.front() ); |
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| 197 | designators.pop_front(); |
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| 198 | memberIter->setPosition( designators ); |
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| 199 | } |
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| 200 | } |
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| 201 | |
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| 202 | virtual std::list<InitAlternative> operator*() const { |
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| 203 | return first(); |
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| 204 | } |
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| 205 | |
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[4b97770] | 206 | virtual operator bool() const { return index < size; } |
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[e4d829b] | 207 | |
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| 208 | virtual MemberIterator & bigStep() { |
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| 209 | PRINT( std::cerr << "bigStep in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
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| 210 | ++index; |
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| 211 | delete memberIter; |
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[4b97770] | 212 | if ( index < size ) memberIter = createMemberIterator( base ); |
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[e4d829b] | 213 | else memberIter = nullptr; |
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| 214 | return *this; |
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| 215 | } |
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| 216 | |
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| 217 | virtual MemberIterator & smallStep() { |
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| 218 | PRINT( std::cerr << "smallStep in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
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| 219 | if ( memberIter ) { |
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| 220 | PRINT( std::cerr << "has member iter: " << *memberIter << std::endl; ) |
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| 221 | memberIter->smallStep(); |
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| 222 | if ( *memberIter ) { |
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| 223 | PRINT( std::cerr << "has valid member iter" << std::endl; ) |
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| 224 | return *this; |
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| 225 | } |
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| 226 | } |
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| 227 | return bigStep(); |
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| 228 | } |
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| 229 | |
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| 230 | virtual Type * getType() { return array; } |
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| 231 | virtual Type * getNext() { return base; } |
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| 232 | |
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| 233 | virtual std::list<InitAlternative> first() const { |
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| 234 | PRINT( std::cerr << "first in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
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| 235 | if ( memberIter && *memberIter ) { |
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| 236 | std::list<InitAlternative> ret = memberIter->first(); |
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| 237 | for ( InitAlternative & alt : ret ) { |
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| 238 | alt.designation->get_designators().push_front( new ConstantExpr( Constant::from_ulong( index ) ) ); |
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| 239 | } |
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| 240 | return ret; |
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| 241 | } |
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| 242 | return std::list<InitAlternative>(); |
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| 243 | } |
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| 244 | |
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| 245 | virtual void print( std::ostream & out, Indenter indent ) const { |
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| 246 | out << "ArrayIterator(Array of " << base << ")"; |
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| 247 | if ( memberIter ) { |
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| 248 | Indenter childIndent = indent+1; |
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| 249 | out << std::endl << childIndent; |
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| 250 | memberIter->print( out, childIndent ); |
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| 251 | } |
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| 252 | } |
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| 253 | |
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| 254 | private: |
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| 255 | ArrayType * array = nullptr; |
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| 256 | Type * base = nullptr; |
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| 257 | size_t index = 0; |
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| 258 | size_t size = 0; |
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| 259 | MemberIterator * memberIter = nullptr; |
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| 260 | }; |
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| 261 | |
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| 262 | class AggregateIterator : public MemberIterator { |
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| 263 | public: |
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[62423350] | 264 | typedef std::list<Declaration *> MemberList; |
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| 265 | typedef MemberList::const_iterator iterator; |
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| 266 | std::string kind = ""; // for debug |
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| 267 | std::string name; |
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| 268 | Type * inst = nullptr; |
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| 269 | const MemberList & members; |
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[e4d829b] | 270 | iterator curMember; |
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[62423350] | 271 | bool atbegin = true; // false at first {small,big}Step -- this aggr type is only added to the possibilities at the beginning |
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[e4d829b] | 272 | Type * curType = nullptr; |
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| 273 | MemberIterator * memberIter = nullptr; |
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[62423350] | 274 | mutable TypeSubstitution sub; |
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[e4d829b] | 275 | |
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[62423350] | 276 | AggregateIterator( const std::string & kind, const std::string & name, Type * inst, const MemberList & members ) : kind( kind ), name( name ), inst( inst ), members( members ), curMember( members.begin() ), sub( makeGenericSubstitution( inst ) ) { |
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[c6747a1] | 277 | PRINT( std::cerr << "Creating " << kind << "(" << name << ")"; ) |
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[e4d829b] | 278 | init(); |
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| 279 | } |
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| 280 | |
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| 281 | virtual ~AggregateIterator() { |
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| 282 | delete memberIter; |
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| 283 | } |
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| 284 | |
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| 285 | bool init() { |
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[62423350] | 286 | PRINT( std::cerr << "--init()--" << members.size() << std::endl; ) |
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| 287 | if ( curMember != members.end() ) { |
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[e4d829b] | 288 | if ( ObjectDecl * field = dynamic_cast< ObjectDecl * >( *curMember ) ) { |
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| 289 | PRINT( std::cerr << "incremented to field: " << field << std::endl; ) |
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| 290 | curType = field->get_type(); |
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| 291 | memberIter = createMemberIterator( curType ); |
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| 292 | return true; |
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| 293 | } |
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| 294 | } |
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| 295 | return false; |
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| 296 | } |
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| 297 | |
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| 298 | virtual std::list<InitAlternative> operator*() const { |
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| 299 | if (memberIter && *memberIter) { |
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| 300 | std::list<InitAlternative> ret = memberIter->first(); |
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[62423350] | 301 | PRINT( std::cerr << "sub: " << sub << std::endl; ) |
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[e4d829b] | 302 | for ( InitAlternative & alt : ret ) { |
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| 303 | PRINT( std::cerr << "iterating and adding designators" << std::endl; ) |
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[e3e16bc] | 304 | alt.designation->get_designators().push_front( new VariableExpr( strict_dynamic_cast< ObjectDecl * >( *curMember ) ) ); |
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[62423350] | 305 | // need to substitute for generic types, so that casts are to concrete types |
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| 306 | PRINT( std::cerr << " type is: " << alt.type; ) |
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| 307 | sub.apply( alt.type ); // also apply to designation?? |
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| 308 | PRINT( std::cerr << " ==> " << alt.type << std::endl; ) |
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[e4d829b] | 309 | } |
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| 310 | return ret; |
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| 311 | } |
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| 312 | return std::list<InitAlternative>(); |
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| 313 | } |
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| 314 | |
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| 315 | virtual void setPosition( std::list< Expression * > & designators ) { |
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| 316 | if ( ! designators.empty() ) { |
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| 317 | if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( designators.front() ) ) { |
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[62423350] | 318 | for ( curMember = members.begin(); curMember != members.end(); ++curMember ) { |
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[e4d829b] | 319 | if ( *curMember == varExpr->get_var() ) { |
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| 320 | designators.pop_front(); |
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| 321 | delete memberIter; |
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| 322 | memberIter = createMemberIterator( varExpr->get_result() ); |
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| 323 | curType = varExpr->get_result(); |
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[62423350] | 324 | atbegin = curMember == members.begin() && designators.empty(); // xxx - is this the right condition for atbegin?? |
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[e4d829b] | 325 | memberIter->setPosition( designators ); |
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| 326 | return; |
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| 327 | } // if |
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| 328 | } // for |
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[62423350] | 329 | assertf( false, "could not find member in %s: %s", kind.c_str(), toString( varExpr ).c_str() ); |
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[e4d829b] | 330 | } else { |
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[62423350] | 331 | assertf( false, "bad designator given to %s: %s", kind.c_str(), toString( designators.front() ).c_str() ); |
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[e4d829b] | 332 | } // if |
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| 333 | } // if |
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| 334 | } |
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| 335 | |
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| 336 | virtual MemberIterator & smallStep() { |
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| 337 | PRINT( std::cerr << "smallStep in " << kind << std::endl; ) |
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| 338 | atbegin = false; |
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| 339 | if ( memberIter ) { |
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| 340 | PRINT( std::cerr << "has member iter, incrementing..." << std::endl; ) |
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| 341 | memberIter->smallStep(); |
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| 342 | if ( *memberIter ) { |
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| 343 | PRINT( std::cerr << "success!" << std::endl; ) |
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| 344 | return *this; |
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| 345 | } |
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| 346 | } |
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| 347 | return bigStep(); |
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| 348 | } |
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| 349 | |
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| 350 | virtual Type * getType() { return inst; } |
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| 351 | virtual Type * getNext() { |
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| 352 | if ( memberIter && *memberIter ) return memberIter->getType(); // xxx - ??? recursive call??? |
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| 353 | return nullptr; |
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| 354 | } |
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| 355 | |
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| 356 | virtual std::list<InitAlternative> first() const { |
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| 357 | std::list<InitAlternative> ret; |
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| 358 | PRINT( std::cerr << "first " << kind << std::endl; ) |
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| 359 | if ( memberIter && *memberIter ) { // might not need *memberIter?? |
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| 360 | PRINT( std::cerr << "adding children" << std::endl; ) |
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| 361 | ret = memberIter->first(); |
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| 362 | for ( InitAlternative & alt : ret ) { |
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| 363 | PRINT( std::cerr << "iterating and adding designators" << std::endl; ) |
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[e3e16bc] | 364 | alt.designation->get_designators().push_front( new VariableExpr( strict_dynamic_cast< ObjectDecl * >( *curMember ) ) ); |
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[e4d829b] | 365 | } |
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| 366 | } |
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[84e8423] | 367 | if ( atbegin ) { |
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[e4d829b] | 368 | // xxx - what about case of empty struct?? |
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| 369 | // only add self if at the very beginning of the structure |
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| 370 | PRINT( std::cerr << "adding self" << std::endl; ) |
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| 371 | ret.push_front( { inst->clone(), new Designation( {} ) } ); |
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| 372 | } |
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| 373 | return ret; |
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| 374 | } |
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| 375 | |
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| 376 | virtual void print( std::ostream & out, Indenter indent ) const { |
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[62423350] | 377 | out << kind << "(" << name << ")"; |
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[e4d829b] | 378 | if ( memberIter ) { |
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| 379 | Indenter childIndent = indent+1; |
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| 380 | out << std::endl << childIndent; |
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| 381 | memberIter->print( out, childIndent ); |
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| 382 | } |
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| 383 | } |
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| 384 | }; |
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| 385 | |
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| 386 | class UnionIterator : public AggregateIterator { |
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| 387 | public: |
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[62423350] | 388 | UnionIterator( UnionInstType * inst ) : AggregateIterator( "UnionIterator", inst->get_name(), inst, inst->get_baseUnion()->get_members() ) {} |
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[e4d829b] | 389 | |
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| 390 | virtual operator bool() const { return (memberIter && *memberIter); } |
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| 391 | virtual MemberIterator & bigStep() { |
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| 392 | // unions only initialize one member |
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| 393 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
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| 394 | atbegin = false; |
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| 395 | delete memberIter; |
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| 396 | memberIter = nullptr; |
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| 397 | curType = nullptr; |
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[62423350] | 398 | curMember = members.end(); |
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[e4d829b] | 399 | return *this; |
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| 400 | } |
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| 401 | }; |
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| 402 | |
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| 403 | class StructIterator : public AggregateIterator { |
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| 404 | public: |
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[62423350] | 405 | StructIterator( StructInstType * inst ) : AggregateIterator( "StructIterator", inst->get_name(), inst, inst->get_baseStruct()->get_members() ) {} |
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| 406 | |
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| 407 | virtual operator bool() const { return curMember != members.end() || (memberIter && *memberIter); } |
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| 408 | |
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| 409 | virtual MemberIterator & bigStep() { |
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| 410 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
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| 411 | atbegin = false; |
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| 412 | delete memberIter; |
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| 413 | memberIter = nullptr; |
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| 414 | curType = nullptr; |
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| 415 | for ( ; curMember != members.end(); ) { |
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| 416 | ++curMember; |
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| 417 | if ( init() ) { |
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| 418 | return *this; |
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| 419 | } |
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| 420 | } |
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| 421 | return *this; |
---|
| 422 | } |
---|
| 423 | }; |
---|
| 424 | |
---|
| 425 | class TupleIterator : public AggregateIterator { |
---|
| 426 | public: |
---|
| 427 | TupleIterator( TupleType * inst ) : AggregateIterator( "TupleIterator", toString("Tuple", inst->size()), inst, inst->get_members() ) {} |
---|
[e4d829b] | 428 | |
---|
[62423350] | 429 | virtual operator bool() const { return curMember != members.end() || (memberIter && *memberIter); } |
---|
[e4d829b] | 430 | |
---|
| 431 | virtual MemberIterator & bigStep() { |
---|
| 432 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
---|
| 433 | atbegin = false; |
---|
| 434 | delete memberIter; |
---|
| 435 | memberIter = nullptr; |
---|
| 436 | curType = nullptr; |
---|
[62423350] | 437 | for ( ; curMember != members.end(); ) { |
---|
[e4d829b] | 438 | ++curMember; |
---|
| 439 | if ( init() ) { |
---|
| 440 | return *this; |
---|
| 441 | } |
---|
| 442 | } |
---|
| 443 | return *this; |
---|
| 444 | } |
---|
| 445 | }; |
---|
| 446 | |
---|
| 447 | MemberIterator * createMemberIterator( Type * type ) { |
---|
| 448 | if ( ReferenceToType * aggr = dynamic_cast< ReferenceToType * >( type ) ) { |
---|
| 449 | if ( StructInstType * sit = dynamic_cast< StructInstType * >( aggr ) ) { |
---|
| 450 | return new StructIterator( sit ); |
---|
| 451 | } else if ( UnionInstType * uit = dynamic_cast< UnionInstType * >( aggr ) ) { |
---|
| 452 | return new UnionIterator( uit ); |
---|
| 453 | } else { |
---|
[78754d7] | 454 | assertf( dynamic_cast< EnumInstType * >( type ) || dynamic_cast< TypeInstType * >( type ), "Encountered unhandled ReferenceToType in createMemberIterator: %s", toString( type ).c_str() ); |
---|
[62423350] | 455 | return new SimpleIterator( type ); |
---|
[e4d829b] | 456 | } |
---|
| 457 | } else if ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) { |
---|
| 458 | return new ArrayIterator( at ); |
---|
[62423350] | 459 | } else if ( TupleType * tt = dynamic_cast< TupleType * >( type ) ) { |
---|
| 460 | return new TupleIterator( tt ); |
---|
[e4d829b] | 461 | } else { |
---|
| 462 | return new SimpleIterator( type ); |
---|
| 463 | } |
---|
| 464 | } |
---|
| 465 | |
---|
| 466 | CurrentObject::CurrentObject() {} |
---|
| 467 | CurrentObject::CurrentObject( Type * type ) { |
---|
| 468 | objStack.push( new SimpleIterator( type ) ); |
---|
| 469 | } |
---|
| 470 | |
---|
| 471 | |
---|
| 472 | void CurrentObject::setNext( Designation * designation ) { |
---|
| 473 | assertf( ! objStack.empty(), "obj stack empty in setNext" ); |
---|
| 474 | PRINT( std::cerr << "____setNext" << designation << std::endl; ) |
---|
| 475 | objStack.top()->setPosition( designation->get_designators() ); |
---|
| 476 | } |
---|
| 477 | |
---|
| 478 | Designation * CurrentObject::findNext( Designation * designation ) { |
---|
| 479 | typedef std::list< Expression * > DesignatorChain; |
---|
| 480 | PRINT( std::cerr << "___findNext" << std::endl; ) |
---|
| 481 | // find all the d's |
---|
| 482 | std::list<DesignatorChain> desigAlts{ { } }, newDesigAlts; |
---|
| 483 | std::list<Type *> curTypes { (objStack.top())->getType() }, newTypes; |
---|
| 484 | for ( Expression * expr : designation->get_designators() ) { |
---|
| 485 | PRINT( std::cerr << "____untyped: " << expr << std::endl; ) |
---|
| 486 | std::list<DesignatorChain>::iterator dit = desigAlts.begin(); |
---|
| 487 | if ( NameExpr * nexpr = dynamic_cast<NameExpr *>(expr) ) { |
---|
| 488 | for ( Type * t : curTypes ) { |
---|
| 489 | assert( dit != desigAlts.end() ); |
---|
| 490 | DesignatorChain & d = *dit; |
---|
| 491 | PRINT( std::cerr << "____actual: " << t << std::endl; ) |
---|
| 492 | ReferenceToType * refType = dynamic_cast<ReferenceToType *>(t); |
---|
| 493 | std::list<Declaration *> members; |
---|
| 494 | if ( refType ) { |
---|
| 495 | refType->lookup( nexpr->get_name(), members ); // concatenate identical field name |
---|
| 496 | // xxx - need to also include anonymous members in this somehow... |
---|
| 497 | for ( Declaration * mem: members ) { |
---|
| 498 | if ( ObjectDecl * field = dynamic_cast<ObjectDecl *>(mem) ) { |
---|
| 499 | PRINT( std::cerr << "____alt: " << field->get_type() << std::endl; ) |
---|
| 500 | DesignatorChain newD = d; |
---|
| 501 | newD.push_back( new VariableExpr( field ) ); |
---|
| 502 | newDesigAlts.push_back( newD ); |
---|
| 503 | newTypes.push_back( field->get_type() ); |
---|
| 504 | } // if |
---|
| 505 | } // for |
---|
| 506 | } // if |
---|
| 507 | ++dit; |
---|
| 508 | } // for |
---|
| 509 | } else { |
---|
| 510 | for ( Type * t : curTypes ) { |
---|
| 511 | assert( dit != desigAlts.end() ); |
---|
| 512 | DesignatorChain & d = *dit; |
---|
| 513 | if ( ArrayType * at = dynamic_cast< ArrayType * > ( t ) ) { |
---|
| 514 | PRINT( std::cerr << "____alt: " << at->get_base() << std::endl; ) |
---|
| 515 | d.push_back( expr ); |
---|
| 516 | newDesigAlts.push_back( d ); |
---|
| 517 | newTypes.push_back( at->get_base() ); |
---|
| 518 | } |
---|
| 519 | ++dit; |
---|
| 520 | } // for |
---|
| 521 | } // if |
---|
| 522 | desigAlts = newDesigAlts; |
---|
| 523 | newDesigAlts.clear(); |
---|
| 524 | curTypes = newTypes; |
---|
| 525 | newTypes.clear(); |
---|
[56e49b0] | 526 | assertf( desigAlts.size() == curTypes.size(), "Designator alternatives (%zu) and current types (%zu) out of sync", desigAlts.size(), curTypes.size() ); |
---|
[e4d829b] | 527 | } // for |
---|
| 528 | if ( desigAlts.size() > 1 ) { |
---|
[a16764a6] | 529 | SemanticError( designation, toString("Too many alternatives (", desigAlts.size(), ") for designation: ") ); |
---|
[e4d829b] | 530 | } else if ( desigAlts.size() == 0 ) { |
---|
[a16764a6] | 531 | SemanticError( designation, "No reasonable alternatives for designation: " ); |
---|
[e4d829b] | 532 | } |
---|
| 533 | DesignatorChain & d = desigAlts.back(); |
---|
| 534 | PRINT( for ( Expression * expr : d ) { |
---|
| 535 | std::cerr << "____desig: " << expr << std::endl; |
---|
| 536 | } ) // for |
---|
| 537 | assertf( ! curTypes.empty(), "empty designator chosen"); |
---|
| 538 | |
---|
| 539 | // set new designators |
---|
| 540 | assertf( ! objStack.empty(), "empty object stack when setting designation" ); |
---|
| 541 | Designation * actualDesignation = new Designation( d ); |
---|
| 542 | objStack.top()->setPosition( d ); // destroys d |
---|
| 543 | return actualDesignation; |
---|
| 544 | } |
---|
| 545 | |
---|
| 546 | void CurrentObject::increment() { |
---|
| 547 | PRINT( std::cerr << "____increment" << std::endl; ) |
---|
| 548 | if ( ! objStack.empty() ) { |
---|
| 549 | PRINT( std::cerr << *objStack.top() << std::endl; ) |
---|
| 550 | objStack.top()->smallStep(); |
---|
| 551 | } |
---|
| 552 | } |
---|
| 553 | |
---|
| 554 | void CurrentObject::enterListInit() { |
---|
| 555 | PRINT( std::cerr << "____entering list init" << std::endl; ) |
---|
| 556 | assertf( ! objStack.empty(), "empty obj stack entering list init" ); |
---|
| 557 | Type * type = objStack.top()->getNext(); |
---|
| 558 | if ( type ) { |
---|
| 559 | objStack.push( createMemberIterator( type ) ); |
---|
| 560 | } else { |
---|
| 561 | assertf( false, "not sure about this case..." ); |
---|
| 562 | } |
---|
| 563 | } |
---|
| 564 | |
---|
| 565 | void CurrentObject::exitListInit() { |
---|
| 566 | PRINT( std::cerr << "____exiting list init" << std::endl; ) |
---|
| 567 | assertf( ! objStack.empty(), "objstack empty" ); |
---|
| 568 | delete objStack.top(); |
---|
| 569 | objStack.pop(); |
---|
| 570 | if ( ! objStack.empty() ) { |
---|
| 571 | PRINT( std::cerr << *objStack.top() << std::endl; ) |
---|
| 572 | objStack.top()->bigStep(); |
---|
| 573 | } |
---|
| 574 | } |
---|
| 575 | |
---|
| 576 | std::list< InitAlternative > CurrentObject::getOptions() { |
---|
| 577 | PRINT( std::cerr << "____getting current options" << std::endl; ) |
---|
| 578 | assertf( ! objStack.empty(), "objstack empty in getOptions" ); |
---|
| 579 | return **objStack.top(); |
---|
| 580 | } |
---|
[62423350] | 581 | |
---|
| 582 | Type * CurrentObject::getCurrentType() { |
---|
| 583 | PRINT( std::cerr << "____getting current type" << std::endl; ) |
---|
| 584 | assertf( ! objStack.empty(), "objstack empty in getCurrentType" ); |
---|
| 585 | return objStack.top()->getNext(); |
---|
| 586 | } |
---|
[e4d829b] | 587 | } // namespace ResolvExpr |
---|
| 588 | |
---|
[b7d92b96] | 589 | namespace ast { |
---|
[60aaa51d] | 590 | /// create a new MemberIterator that traverses a type correctly |
---|
| 591 | MemberIterator * createMemberIterator( const CodeLocation & loc, const Type * type ); |
---|
[b7d92b96] | 592 | |
---|
| 593 | /// Iterates "other" types (e.g. basic, pointer) which do not change at list initializer entry |
---|
| 594 | class SimpleIterator final : public MemberIterator { |
---|
[2b59f55] | 595 | CodeLocation location; |
---|
[954c954] | 596 | const Type * type = nullptr; |
---|
[b7d92b96] | 597 | public: |
---|
[2b59f55] | 598 | SimpleIterator( const CodeLocation & loc, const Type * t ) : location( loc ), type( t ) {} |
---|
| 599 | |
---|
[2890212] | 600 | void setPosition( |
---|
| 601 | std::deque< ptr< Expr > >::const_iterator begin, |
---|
[60aaa51d] | 602 | std::deque< ptr< Expr > >::const_iterator end |
---|
| 603 | ) override { |
---|
| 604 | if ( begin != end ) { |
---|
| 605 | SemanticError( location, "Un-designated initializer given non-empty designator" ); |
---|
| 606 | } |
---|
| 607 | } |
---|
[2b59f55] | 608 | |
---|
[60aaa51d] | 609 | std::deque< InitAlternative > operator* () const override { return first(); } |
---|
| 610 | |
---|
| 611 | operator bool() const override { return type; } |
---|
| 612 | |
---|
| 613 | SimpleIterator & bigStep() override { return smallStep(); } |
---|
| 614 | SimpleIterator & smallStep() override { |
---|
| 615 | type = nullptr; // empty on increment because no members |
---|
| 616 | return *this; |
---|
| 617 | } |
---|
| 618 | |
---|
| 619 | const Type * getType() override { return type; } |
---|
| 620 | |
---|
| 621 | const Type * getNext() override { return type; } |
---|
| 622 | |
---|
| 623 | std::deque< InitAlternative > first() const override { |
---|
[2b59f55] | 624 | if ( type ) return { InitAlternative{ type, new Designation{ location } } }; |
---|
| 625 | return {}; |
---|
| 626 | } |
---|
[b7d92b96] | 627 | }; |
---|
| 628 | |
---|
[60aaa51d] | 629 | /// Iterates array types |
---|
| 630 | class ArrayIterator final : public MemberIterator { |
---|
| 631 | CodeLocation location; |
---|
[954c954] | 632 | const ArrayType * array = nullptr; |
---|
| 633 | const Type * base = nullptr; |
---|
[60aaa51d] | 634 | size_t index = 0; |
---|
| 635 | size_t size = 0; |
---|
| 636 | std::unique_ptr< MemberIterator > memberIter; |
---|
| 637 | |
---|
| 638 | void setSize( const Expr * expr ) { |
---|
| 639 | auto res = eval(expr); |
---|
| 640 | if ( ! res.second ) { |
---|
[2890212] | 641 | SemanticError( location, |
---|
[60aaa51d] | 642 | toString("Array designator must be a constant expression: ", expr ) ); |
---|
| 643 | } |
---|
| 644 | size = res.first; |
---|
| 645 | } |
---|
| 646 | |
---|
| 647 | public: |
---|
[2890212] | 648 | ArrayIterator( const CodeLocation & loc, const ArrayType * at ) |
---|
[60aaa51d] | 649 | : location( loc ), array( at ), base( at->base ) { |
---|
| 650 | PRINT( std::cerr << "Creating array iterator: " << at << std::endl; ) |
---|
| 651 | memberIter.reset( createMemberIterator( loc, base ) ); |
---|
| 652 | if ( at->isVarLen ) { |
---|
| 653 | SemanticError( location, at, "VLA initialization does not support @=: " ); |
---|
| 654 | } |
---|
| 655 | setSize( at->dimension ); |
---|
| 656 | } |
---|
| 657 | |
---|
| 658 | void setPosition( const Expr * expr ) { |
---|
[2890212] | 659 | // need to permit integer-constant-expressions, including: integer constants, |
---|
| 660 | // enumeration constants, character constants, sizeof expressions, alignof expressions, |
---|
[60aaa51d] | 661 | // cast expressions |
---|
| 662 | if ( auto constExpr = dynamic_cast< const ConstantExpr * >( expr ) ) { |
---|
| 663 | try { |
---|
| 664 | index = constExpr->intValue(); |
---|
| 665 | } catch ( SemanticErrorException & ) { |
---|
[2890212] | 666 | SemanticError( expr, |
---|
[60aaa51d] | 667 | "Constant expression of non-integral type in array designator: " ); |
---|
| 668 | } |
---|
| 669 | } else if ( auto castExpr = dynamic_cast< const CastExpr * >( expr ) ) { |
---|
| 670 | setPosition( castExpr->arg ); |
---|
[2890212] | 671 | } else if ( |
---|
| 672 | dynamic_cast< const SizeofExpr * >( expr ) |
---|
| 673 | || dynamic_cast< const AlignofExpr * >( expr ) |
---|
[60aaa51d] | 674 | ) { |
---|
| 675 | index = 0; |
---|
| 676 | } else { |
---|
[2890212] | 677 | assertf( false, |
---|
[60aaa51d] | 678 | "bad designator given to ArrayIterator: %s", toString( expr ).c_str() ); |
---|
| 679 | } |
---|
| 680 | } |
---|
| 681 | |
---|
[2890212] | 682 | void setPosition( |
---|
| 683 | std::deque< ptr< Expr > >::const_iterator begin, |
---|
[60aaa51d] | 684 | std::deque< ptr< Expr > >::const_iterator end |
---|
| 685 | ) override { |
---|
| 686 | if ( begin == end ) return; |
---|
| 687 | |
---|
| 688 | setPosition( *begin ); |
---|
| 689 | memberIter->setPosition( ++begin, end ); |
---|
| 690 | } |
---|
| 691 | |
---|
| 692 | std::deque< InitAlternative > operator* () const override { return first(); } |
---|
| 693 | |
---|
| 694 | operator bool() const override { return index < size; } |
---|
| 695 | |
---|
| 696 | ArrayIterator & bigStep() override { |
---|
| 697 | PRINT( std::cerr << "bigStep in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
---|
| 698 | ++index; |
---|
| 699 | memberIter.reset( index < size ? createMemberIterator( location, base ) : nullptr ); |
---|
| 700 | return *this; |
---|
| 701 | } |
---|
| 702 | |
---|
| 703 | ArrayIterator & smallStep() override { |
---|
| 704 | PRINT( std::cerr << "smallStep in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
---|
| 705 | if ( memberIter ) { |
---|
| 706 | PRINT( std::cerr << "has member iter: " << *memberIter << std::endl; ) |
---|
| 707 | memberIter->smallStep(); |
---|
| 708 | if ( *memberIter ) { |
---|
| 709 | PRINT( std::cerr << "has valid member iter" << std::endl; ) |
---|
| 710 | return *this; |
---|
| 711 | } |
---|
| 712 | } |
---|
| 713 | return bigStep(); |
---|
| 714 | } |
---|
| 715 | |
---|
| 716 | const Type * getType() override { return array; } |
---|
| 717 | |
---|
| 718 | const Type * getNext() override { return base; } |
---|
| 719 | |
---|
| 720 | std::deque< InitAlternative > first() const override { |
---|
| 721 | PRINT( std::cerr << "first in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
---|
| 722 | if ( memberIter && *memberIter ) { |
---|
| 723 | std::deque< InitAlternative > ret = memberIter->first(); |
---|
| 724 | for ( InitAlternative & alt : ret ) { |
---|
| 725 | alt.designation.get_and_mutate()->designators.emplace_front( |
---|
| 726 | ConstantExpr::from_ulong( location, index ) ); |
---|
| 727 | } |
---|
| 728 | return ret; |
---|
| 729 | } |
---|
| 730 | return {}; |
---|
| 731 | } |
---|
| 732 | }; |
---|
| 733 | |
---|
| 734 | class AggregateIterator : public MemberIterator { |
---|
| 735 | protected: |
---|
| 736 | using MemberList = std::vector< ptr< Decl > >; |
---|
| 737 | |
---|
| 738 | CodeLocation location; |
---|
| 739 | std::string kind; // for debug |
---|
| 740 | std::string name; |
---|
| 741 | const Type * inst; |
---|
| 742 | const MemberList & members; |
---|
| 743 | MemberList::const_iterator curMember; |
---|
| 744 | bool atbegin = true; // false at first {small,big}Step |
---|
| 745 | const Type * curType = nullptr; |
---|
| 746 | std::unique_ptr< MemberIterator > memberIter = nullptr; |
---|
| 747 | TypeSubstitution sub; |
---|
| 748 | |
---|
| 749 | bool init() { |
---|
| 750 | PRINT( std::cerr << "--init()--" << members.size() << std::endl; ) |
---|
| 751 | if ( curMember != members.end() ) { |
---|
| 752 | if ( auto field = curMember->as< ObjectDecl >() ) { |
---|
| 753 | PRINT( std::cerr << "incremented to field: " << field << std::endl; ) |
---|
| 754 | curType = field->get_type(); |
---|
| 755 | memberIter.reset( createMemberIterator( location, curType ) ); |
---|
| 756 | return true; |
---|
| 757 | } |
---|
| 758 | } |
---|
| 759 | return false; |
---|
| 760 | } |
---|
| 761 | |
---|
[2890212] | 762 | AggregateIterator( |
---|
| 763 | const CodeLocation & loc, const std::string k, const std::string & n, const Type * i, |
---|
[60aaa51d] | 764 | const MemberList & ms ) |
---|
[2890212] | 765 | : location( loc ), kind( k ), name( n ), inst( i ), members( ms ), curMember( ms.begin() ), |
---|
[60aaa51d] | 766 | sub( genericSubstitution( i ) ) { |
---|
| 767 | PRINT( std::cerr << "Creating " << kind << "(" << name << ")"; ) |
---|
| 768 | init(); |
---|
| 769 | } |
---|
| 770 | |
---|
| 771 | public: |
---|
[2890212] | 772 | void setPosition( |
---|
| 773 | std::deque< ptr< Expr > >::const_iterator begin, |
---|
[60aaa51d] | 774 | std::deque< ptr< Expr > >::const_iterator end |
---|
| 775 | ) final { |
---|
| 776 | if ( begin == end ) return; |
---|
| 777 | |
---|
| 778 | if ( auto varExpr = begin->as< VariableExpr >() ) { |
---|
| 779 | for ( curMember = members.begin(); curMember != members.end(); ++curMember ) { |
---|
| 780 | if ( *curMember != varExpr->var ) continue; |
---|
| 781 | |
---|
| 782 | ++begin; |
---|
| 783 | |
---|
| 784 | memberIter.reset( createMemberIterator( location, varExpr->result ) ); |
---|
| 785 | curType = varExpr->result; |
---|
| 786 | atbegin = curMember == members.begin() && begin == end; |
---|
| 787 | memberIter->setPosition( begin, end ); |
---|
| 788 | return; |
---|
| 789 | } |
---|
[2890212] | 790 | assertf( false, |
---|
[60aaa51d] | 791 | "could not find member in %s: %s", kind.c_str(), toString( varExpr ).c_str() ); |
---|
| 792 | } else { |
---|
[2890212] | 793 | assertf( false, |
---|
[60aaa51d] | 794 | "bad designator given to %s: %s", kind.c_str(), toString( *begin ).c_str() ); |
---|
| 795 | } |
---|
| 796 | } |
---|
| 797 | |
---|
| 798 | std::deque< InitAlternative > operator* () const final { |
---|
| 799 | if ( memberIter && *memberIter ) { |
---|
| 800 | std::deque< InitAlternative > ret = memberIter->first(); |
---|
| 801 | PRINT( std::cerr << "sub: " << sub << std::endl; ) |
---|
| 802 | for ( InitAlternative & alt : ret ) { |
---|
| 803 | PRINT( std::cerr << "iterating and adding designators" << std::endl; ) |
---|
| 804 | alt.designation.get_and_mutate()->designators.emplace_front( |
---|
| 805 | new VariableExpr{ location, curMember->strict_as< ObjectDecl >() } ); |
---|
| 806 | // need to substitute for generic types so that casts are to concrete types |
---|
[8e1467d] | 807 | alt.type = shallowCopy(alt.type.get()); |
---|
[60aaa51d] | 808 | PRINT( std::cerr << " type is: " << alt.type; ) |
---|
| 809 | sub.apply( alt.type ); // also apply to designation?? |
---|
| 810 | PRINT( std::cerr << " ==> " << alt.type << std::endl; ) |
---|
| 811 | } |
---|
| 812 | return ret; |
---|
| 813 | } |
---|
| 814 | return {}; |
---|
| 815 | } |
---|
| 816 | |
---|
| 817 | AggregateIterator & smallStep() final { |
---|
| 818 | PRINT( std::cerr << "smallStep in " << kind << std::endl; ) |
---|
| 819 | atbegin = false; |
---|
| 820 | if ( memberIter ) { |
---|
| 821 | PRINT( std::cerr << "has member iter, incrementing..." << std::endl; ) |
---|
| 822 | memberIter->smallStep(); |
---|
| 823 | if ( *memberIter ) { |
---|
| 824 | PRINT( std::cerr << "success!" << std::endl; ) |
---|
| 825 | return *this; |
---|
| 826 | } |
---|
| 827 | } |
---|
| 828 | return bigStep(); |
---|
| 829 | } |
---|
| 830 | |
---|
| 831 | AggregateIterator & bigStep() override = 0; |
---|
| 832 | |
---|
| 833 | const Type * getType() final { return inst; } |
---|
| 834 | |
---|
| 835 | const Type * getNext() final { |
---|
| 836 | return ( memberIter && *memberIter ) ? memberIter->getType() : nullptr; |
---|
| 837 | } |
---|
| 838 | |
---|
| 839 | std::deque< InitAlternative > first() const final { |
---|
| 840 | std::deque< InitAlternative > ret; |
---|
| 841 | PRINT( std::cerr << "first " << kind << std::endl; ) |
---|
| 842 | if ( memberIter && *memberIter ) { |
---|
| 843 | PRINT( std::cerr << "adding children" << std::endl; ) |
---|
| 844 | ret = memberIter->first(); |
---|
| 845 | for ( InitAlternative & alt : ret ) { |
---|
| 846 | PRINT( std::cerr << "iterating and adding designators" << std::endl; ) |
---|
[2890212] | 847 | alt.designation.get_and_mutate()->designators.emplace_front( |
---|
[60aaa51d] | 848 | new VariableExpr{ location, curMember->strict_as< ObjectDecl >() } ); |
---|
| 849 | } |
---|
| 850 | } |
---|
| 851 | if ( atbegin ) { |
---|
| 852 | // only add self if at the very beginning of the structure |
---|
| 853 | PRINT( std::cerr << "adding self" << std::endl; ) |
---|
| 854 | ret.emplace_front( inst, new Designation{ location } ); |
---|
| 855 | } |
---|
| 856 | return ret; |
---|
| 857 | } |
---|
| 858 | }; |
---|
| 859 | |
---|
| 860 | class StructIterator final : public AggregateIterator { |
---|
| 861 | public: |
---|
| 862 | StructIterator( const CodeLocation & loc, const StructInstType * inst ) |
---|
| 863 | : AggregateIterator( loc, "StructIterator", inst->name, inst, inst->base->members ) {} |
---|
| 864 | |
---|
| 865 | operator bool() const override { |
---|
| 866 | return curMember != members.end() || (memberIter && *memberIter); |
---|
| 867 | } |
---|
| 868 | |
---|
| 869 | StructIterator & bigStep() override { |
---|
| 870 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
---|
| 871 | atbegin = false; |
---|
| 872 | memberIter = nullptr; |
---|
| 873 | curType = nullptr; |
---|
| 874 | while ( curMember != members.end() ) { |
---|
| 875 | ++curMember; |
---|
| 876 | if ( init() ) return *this; |
---|
| 877 | } |
---|
| 878 | return *this; |
---|
| 879 | } |
---|
| 880 | }; |
---|
| 881 | |
---|
| 882 | class UnionIterator final : public AggregateIterator { |
---|
| 883 | public: |
---|
| 884 | UnionIterator( const CodeLocation & loc, const UnionInstType * inst ) |
---|
| 885 | : AggregateIterator( loc, "UnionIterator", inst->name, inst, inst->base->members ) {} |
---|
| 886 | |
---|
| 887 | operator bool() const override { return memberIter && *memberIter; } |
---|
| 888 | |
---|
| 889 | UnionIterator & bigStep() override { |
---|
| 890 | // unions only initialize one member |
---|
| 891 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
---|
| 892 | atbegin = false; |
---|
| 893 | memberIter = nullptr; |
---|
| 894 | curType = nullptr; |
---|
| 895 | curMember = members.end(); |
---|
| 896 | return *this; |
---|
| 897 | } |
---|
| 898 | }; |
---|
| 899 | |
---|
| 900 | class TupleIterator final : public AggregateIterator { |
---|
| 901 | public: |
---|
[2890212] | 902 | TupleIterator( const CodeLocation & loc, const TupleType * inst ) |
---|
| 903 | : AggregateIterator( |
---|
| 904 | loc, "TupleIterator", toString("Tuple", inst->size()), inst, inst->members |
---|
[60aaa51d] | 905 | ) {} |
---|
| 906 | |
---|
| 907 | operator bool() const override { |
---|
| 908 | return curMember != members.end() || (memberIter && *memberIter); |
---|
| 909 | } |
---|
| 910 | |
---|
| 911 | TupleIterator & bigStep() override { |
---|
| 912 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
---|
| 913 | atbegin = false; |
---|
| 914 | memberIter = nullptr; |
---|
| 915 | curType = nullptr; |
---|
| 916 | while ( curMember != members.end() ) { |
---|
| 917 | ++curMember; |
---|
| 918 | if ( init() ) return *this; |
---|
| 919 | } |
---|
| 920 | return *this; |
---|
| 921 | } |
---|
| 922 | }; |
---|
| 923 | |
---|
| 924 | MemberIterator * createMemberIterator( const CodeLocation & loc, const Type * type ) { |
---|
[98e8b3b] | 925 | if ( auto aggr = dynamic_cast< const BaseInstType * >( type ) ) { |
---|
[60aaa51d] | 926 | if ( auto sit = dynamic_cast< const StructInstType * >( aggr ) ) { |
---|
[de57af9] | 927 | assert( sit->base ); |
---|
[60aaa51d] | 928 | return new StructIterator{ loc, sit }; |
---|
| 929 | } else if ( auto uit = dynamic_cast< const UnionInstType * >( aggr ) ) { |
---|
[de57af9] | 930 | assert( uit->base ); |
---|
[60aaa51d] | 931 | return new UnionIterator{ loc, uit }; |
---|
| 932 | } else { |
---|
[2890212] | 933 | assertf( |
---|
| 934 | dynamic_cast< const EnumInstType * >( type ) |
---|
| 935 | || dynamic_cast< const TypeInstType * >( type ), |
---|
[98e8b3b] | 936 | "Encountered unhandled BaseInstType in createMemberIterator: %s", |
---|
[60aaa51d] | 937 | toString( type ).c_str() ); |
---|
| 938 | return new SimpleIterator{ loc, type }; |
---|
| 939 | } |
---|
| 940 | } else if ( auto at = dynamic_cast< const ArrayType * >( type ) ) { |
---|
| 941 | return new ArrayIterator{ loc, at }; |
---|
| 942 | } else if ( auto tt = dynamic_cast< const TupleType * >( type ) ) { |
---|
| 943 | return new TupleIterator{ loc, tt }; |
---|
| 944 | } else { |
---|
| 945 | return new SimpleIterator{ loc, type }; |
---|
| 946 | } |
---|
| 947 | } |
---|
| 948 | |
---|
[2b59f55] | 949 | CurrentObject::CurrentObject( const CodeLocation & loc, const Type * type ) : objStack() { |
---|
| 950 | objStack.emplace_back( new SimpleIterator{ loc, type } ); |
---|
[b7d92b96] | 951 | } |
---|
| 952 | |
---|
[2d11663] | 953 | const Designation * CurrentObject::findNext( const Designation * designation ) { |
---|
| 954 | using DesignatorChain = std::deque< ptr< Expr > >; |
---|
| 955 | PRINT( std::cerr << "___findNext" << std::endl; ) |
---|
[2890212] | 956 | |
---|
[2d11663] | 957 | // find all the d's |
---|
| 958 | std::vector< DesignatorChain > desigAlts{ {} }, newDesigAlts; |
---|
| 959 | std::deque< const Type * > curTypes{ objStack.back()->getType() }, newTypes; |
---|
| 960 | for ( const Expr * expr : designation->designators ) { |
---|
| 961 | PRINT( std::cerr << "____untyped: " << expr << std::endl; ) |
---|
| 962 | auto dit = desigAlts.begin(); |
---|
| 963 | if ( auto nexpr = dynamic_cast< const NameExpr * >( expr ) ) { |
---|
| 964 | for ( const Type * t : curTypes ) { |
---|
| 965 | assert( dit != desigAlts.end() ); |
---|
| 966 | |
---|
| 967 | DesignatorChain & d = *dit; |
---|
| 968 | PRINT( std::cerr << "____actual: " << t << std::endl; ) |
---|
[98e8b3b] | 969 | if ( auto refType = dynamic_cast< const BaseInstType * >( t ) ) { |
---|
[2d11663] | 970 | // concatenate identical field names |
---|
| 971 | for ( const Decl * mem : refType->lookup( nexpr->name ) ) { |
---|
| 972 | if ( auto field = dynamic_cast< const ObjectDecl * >( mem ) ) { |
---|
| 973 | PRINT( std::cerr << "____alt: " << field->type << std::endl; ) |
---|
| 974 | DesignatorChain d2 = d; |
---|
| 975 | d2.emplace_back( new VariableExpr{ expr->location, field } ); |
---|
| 976 | newDesigAlts.emplace_back( std::move( d2 ) ); |
---|
| 977 | newTypes.emplace_back( field->type ); |
---|
| 978 | } |
---|
| 979 | } |
---|
| 980 | } |
---|
| 981 | |
---|
| 982 | ++dit; |
---|
| 983 | } |
---|
| 984 | } else { |
---|
| 985 | for ( const Type * t : curTypes ) { |
---|
| 986 | assert( dit != desigAlts.end() ); |
---|
| 987 | |
---|
| 988 | DesignatorChain & d = *dit; |
---|
| 989 | if ( auto at = dynamic_cast< const ArrayType * >( t ) ) { |
---|
| 990 | PRINT( std::cerr << "____alt: " << at->get_base() << std::endl; ) |
---|
| 991 | d.emplace_back( expr ); |
---|
| 992 | newDesigAlts.emplace_back( d ); |
---|
| 993 | newTypes.emplace_back( at->base ); |
---|
| 994 | } |
---|
| 995 | } |
---|
| 996 | } |
---|
| 997 | |
---|
| 998 | // reset queue |
---|
| 999 | desigAlts = std::move( newDesigAlts ); |
---|
| 1000 | newDesigAlts.clear(); |
---|
| 1001 | curTypes = std::move( newTypes ); |
---|
| 1002 | newTypes.clear(); |
---|
| 1003 | assertf( desigAlts.size() == curTypes.size(), "Designator alternatives (%zu) and current types (%zu) out of sync", desigAlts.size(), curTypes.size() ); |
---|
| 1004 | } |
---|
| 1005 | |
---|
| 1006 | if ( desigAlts.size() > 1 ) { |
---|
| 1007 | SemanticError( designation, toString("Too many alternatives (", desigAlts.size(), ") for designation: ") ); |
---|
| 1008 | } else if ( desigAlts.empty() ) { |
---|
| 1009 | SemanticError( designation, "No reasonable alternatives for designation: " ); |
---|
| 1010 | } |
---|
| 1011 | |
---|
| 1012 | DesignatorChain & d = desigAlts.back(); |
---|
| 1013 | PRINT( for ( Expression * expr : d ) { |
---|
| 1014 | std::cerr << "____desig: " << expr << std::endl; |
---|
| 1015 | } ) // for |
---|
| 1016 | assertf( ! curTypes.empty(), "empty designator chosen"); |
---|
| 1017 | |
---|
| 1018 | // set new designators |
---|
| 1019 | assertf( ! objStack.empty(), "empty object stack when setting designation" ); |
---|
[2890212] | 1020 | Designation * actualDesignation = |
---|
[2d11663] | 1021 | new Designation{ designation->location, DesignatorChain{d} }; |
---|
| 1022 | objStack.back()->setPosition( d ); // destroys d |
---|
| 1023 | return actualDesignation; |
---|
| 1024 | } |
---|
| 1025 | |
---|
| 1026 | void CurrentObject::setNext( const Designation * designation ) { |
---|
[60aaa51d] | 1027 | PRINT( std::cerr << "____setNext" << designation << std::endl; ) |
---|
| 1028 | assertf( ! objStack.empty(), "obj stack empty in setNext" ); |
---|
| 1029 | objStack.back()->setPosition( designation->designators ); |
---|
| 1030 | } |
---|
| 1031 | |
---|
| 1032 | void CurrentObject::increment() { |
---|
| 1033 | PRINT( std::cerr << "____increment" << std::endl; ) |
---|
| 1034 | if ( objStack.empty() ) return; |
---|
| 1035 | PRINT( std::cerr << *objStack.back() << std::endl; ) |
---|
| 1036 | objStack.back()->smallStep(); |
---|
| 1037 | } |
---|
| 1038 | |
---|
| 1039 | void CurrentObject::enterListInit( const CodeLocation & loc ) { |
---|
| 1040 | PRINT( std::cerr << "____entering list init" << std::endl; ) |
---|
| 1041 | assertf( ! objStack.empty(), "empty obj stack entering list init" ); |
---|
| 1042 | const ast::Type * type = objStack.back()->getNext(); |
---|
| 1043 | assert( type ); |
---|
| 1044 | objStack.emplace_back( createMemberIterator( loc, type ) ); |
---|
| 1045 | } |
---|
| 1046 | |
---|
| 1047 | void CurrentObject::exitListInit() { |
---|
| 1048 | PRINT( std::cerr << "____exiting list init" << std::endl; ) |
---|
| 1049 | assertf( ! objStack.empty(), "objstack empty" ); |
---|
| 1050 | objStack.pop_back(); |
---|
| 1051 | if ( ! objStack.empty() ) { |
---|
| 1052 | PRINT( std::cerr << *objStack.back() << std::endl; ) |
---|
| 1053 | objStack.back()->bigStep(); |
---|
| 1054 | } |
---|
| 1055 | } |
---|
| 1056 | |
---|
| 1057 | std::deque< InitAlternative > CurrentObject::getOptions() { |
---|
[2b59f55] | 1058 | PRINT( std::cerr << "____getting current options" << std::endl; ) |
---|
| 1059 | assertf( ! objStack.empty(), "objstack empty in getOptions" ); |
---|
| 1060 | return **objStack.back(); |
---|
| 1061 | } |
---|
[60aaa51d] | 1062 | |
---|
| 1063 | const Type * CurrentObject::getCurrentType() { |
---|
| 1064 | PRINT( std::cerr << "____getting current type" << std::endl; ) |
---|
| 1065 | assertf( ! objStack.empty(), "objstack empty in getCurrentType" ); |
---|
| 1066 | return objStack.back()->getNext(); |
---|
| 1067 | } |
---|
[b7d92b96] | 1068 | } |
---|
| 1069 | |
---|
[e4d829b] | 1070 | // Local Variables: // |
---|
| 1071 | // tab-width: 4 // |
---|
| 1072 | // mode: c++ // |
---|
| 1073 | // compile-command: "make install" // |
---|
| 1074 | // End: // |
---|