[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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| 18 | #include <iostream> // for ostream, operator<<, basic_ost... |
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| 19 | #include <stack> // for stack |
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| 20 | #include <string> // for string, operator<<, allocator |
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[e4d829b] | 21 | |
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[ea6332d] | 22 | #include "Common/Indenter.h" // for Indenter, operator<< |
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| 23 | #include "Common/SemanticError.h" // for SemanticError |
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| 24 | #include "Common/utility.h" // for toString |
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[e4d829b] | 25 | #include "CurrentObject.h" |
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[ea6332d] | 26 | #include "SynTree/Constant.h" // for Constant |
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| 27 | #include "SynTree/Declaration.h" // for ObjectDecl, Declaration, Struc... |
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| 28 | #include "SynTree/Expression.h" // for InitAlternative, VariableExpr |
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| 29 | #include "SynTree/Initializer.h" // for Designation, operator<< |
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| 30 | #include "SynTree/Type.h" // for Type, StructInstType, UnionIns... |
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| 31 | #include "SynTree/TypeSubstitution.h" // for TypeSubstitution |
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[e4d829b] | 32 | |
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| 33 | #if 0 |
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| 34 | #define PRINT(x) x |
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| 35 | #else |
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| 36 | #define PRINT(x) |
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| 37 | #endif |
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| 38 | |
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| 39 | namespace ResolvExpr { |
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[62423350] | 40 | template< typename AggrInst > |
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| 41 | TypeSubstitution makeGenericSubstitution( AggrInst * inst ) { |
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| 42 | assert( inst ); |
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| 43 | assert( inst->get_baseParameters() ); |
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| 44 | std::list< TypeDecl * > baseParams = *inst->get_baseParameters(); |
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| 45 | std::list< Expression * > typeSubs = inst->get_parameters(); |
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| 46 | TypeSubstitution subs( baseParams.begin(), baseParams.end(), typeSubs.begin() ); |
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| 47 | return subs; |
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| 48 | } |
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| 49 | |
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| 50 | TypeSubstitution makeGenericSubstitution( Type * type ) { |
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| 51 | if ( StructInstType * inst = dynamic_cast< StructInstType * >( type ) ) { |
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| 52 | return makeGenericSubstitution( inst ); |
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| 53 | } else if ( UnionInstType * inst = dynamic_cast< UnionInstType * >( type ) ) { |
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| 54 | return makeGenericSubstitution( inst ); |
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| 55 | } else { |
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| 56 | return TypeSubstitution(); |
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| 57 | } |
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| 58 | } |
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| 59 | |
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[e4d829b] | 60 | class MemberIterator { |
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| 61 | public: |
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| 62 | virtual ~MemberIterator() {} |
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| 63 | |
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| 64 | virtual void setPosition( std::list< Expression * > & designators ) = 0; |
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| 65 | virtual std::list<InitAlternative> operator*() const = 0; |
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| 66 | virtual operator bool() const = 0; |
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| 67 | virtual MemberIterator & bigStep() = 0; |
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| 68 | virtual MemberIterator & smallStep() = 0; |
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| 69 | virtual Type * getType() = 0; |
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| 70 | virtual Type * getNext() = 0; |
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| 71 | |
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| 72 | virtual void print( std::ostream & out, Indenter indent ) const = 0; |
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| 73 | |
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| 74 | virtual std::list<InitAlternative> first() const = 0; // should be protected |
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| 75 | }; |
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| 76 | |
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| 77 | std::ostream & operator<<(std::ostream & out, const MemberIterator & it) { |
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| 78 | Indenter indenter; |
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| 79 | it.print( out, indenter ); |
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| 80 | return out; |
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| 81 | } |
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| 82 | |
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| 83 | /// create a new MemberIterator that traverses a type correctly |
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| 84 | MemberIterator * createMemberIterator( Type * type ); |
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| 85 | |
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| 86 | /// iterates "other" types, e.g. basic types, pointer types, etc. which do not change at list initializer entry |
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| 87 | class SimpleIterator : public MemberIterator { |
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| 88 | public: |
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| 89 | SimpleIterator( Type * type ) : type( type ) {} |
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| 90 | |
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| 91 | virtual void setPosition( std::list< Expression * > & designators ) { |
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| 92 | assertf( designators.empty(), "simple iterator given non-empty designator..." ); // xxx - might be semantic error |
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| 93 | } |
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| 94 | |
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| 95 | virtual std::list<InitAlternative> operator*() const { return first(); } |
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| 96 | virtual operator bool() const { return type; } |
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| 97 | |
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| 98 | // big step is the same as small step |
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| 99 | virtual MemberIterator & bigStep() { return smallStep(); } |
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| 100 | virtual MemberIterator & smallStep() { |
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| 101 | type = nullptr; // type is nullified on increment since SimpleIterators do not have members |
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| 102 | return *this; |
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| 103 | } |
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| 104 | |
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[9ff56e7] | 105 | virtual void print( std::ostream & out, __attribute__((unused)) Indenter indent ) const { |
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[e4d829b] | 106 | out << "SimpleIterator(" << type << ")"; |
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| 107 | } |
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| 108 | |
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| 109 | virtual Type * getType() { return type; } |
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| 110 | virtual Type * getNext() { return type; } |
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| 111 | |
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| 112 | protected: |
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| 113 | virtual std::list<InitAlternative> first() const { |
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| 114 | if ( type ) return std::list<InitAlternative>{ { type->clone(), new Designation( {} ) } }; |
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| 115 | else return std::list<InitAlternative>{}; |
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| 116 | } |
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| 117 | private: |
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| 118 | Type * type = nullptr; |
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| 119 | }; |
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| 120 | |
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| 121 | class ArrayIterator : public MemberIterator { |
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| 122 | public: |
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| 123 | ArrayIterator( ArrayType * at ) : array( at ) { |
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| 124 | PRINT( std::cerr << "Creating array iterator: " << at << std::endl; ) |
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| 125 | base = at->get_base(); |
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| 126 | memberIter = createMemberIterator( base ); |
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[4b97770] | 127 | if ( at->isVarLen ) throw SemanticError( "VLA initialization does not support @=", at ); |
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[e4d829b] | 128 | setSize( at->get_dimension() ); |
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| 129 | } |
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| 130 | |
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| 131 | ~ArrayIterator() { |
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| 132 | delete memberIter; |
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| 133 | } |
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| 134 | |
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| 135 | private: |
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| 136 | void setSize( Expression * expr ) { |
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| 137 | if ( ConstantExpr * constExpr = dynamic_cast< ConstantExpr * >( expr ) ) { |
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[4b97770] | 138 | try { |
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| 139 | size = constExpr->intValue(); |
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| 140 | PRINT( std::cerr << "array type with size: " << size << std::endl; ) |
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| 141 | } catch ( SemanticError & ) { |
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| 142 | throw SemanticError( "Constant expression of non-integral type in array dimension: ", expr ); |
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| 143 | } |
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[e4d829b] | 144 | } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) { |
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[62423350] | 145 | setSize( castExpr->get_arg() ); // xxx - need to perform the conversion specified by the cast |
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[f64d9bc] | 146 | } else if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( expr ) ) { |
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| 147 | if ( EnumInstType * inst = dynamic_cast< EnumInstType * > ( varExpr->result ) ) { |
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| 148 | long long int value; |
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| 149 | if ( inst->baseEnum->valueOf( varExpr->var, value ) ) { |
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| 150 | size = value; |
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| 151 | } |
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| 152 | } |
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[e4d829b] | 153 | } else { |
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[62423350] | 154 | assertf( false, "unhandled expression in setSize: %s", toString( expr ).c_str() ); // xxx - if not a constant expression, it's not simple to determine how long the array actually is, which is necessary for initialization to be done correctly -- fix this |
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[e4d829b] | 155 | } |
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| 156 | } |
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| 157 | |
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| 158 | public: |
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| 159 | void setPosition( Expression * expr ) { |
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| 160 | // need to permit integer-constant-expressions, including: integer constants, enumeration constants, character constants, sizeof expressions, _Alignof expressions, cast expressions |
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| 161 | if ( ConstantExpr * constExpr = dynamic_cast< ConstantExpr * >( expr ) ) { |
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[4b97770] | 162 | try { |
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| 163 | index = constExpr->intValue(); |
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| 164 | } catch( SemanticError & ) { |
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| 165 | throw SemanticError( "Constant expression of non-integral type in array designator: ", expr ); |
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| 166 | } |
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[e4d829b] | 167 | } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) { |
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| 168 | setPosition( castExpr->get_arg() ); |
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| 169 | } else if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( expr ) ) { |
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[f64d9bc] | 170 | EnumInstType * inst = dynamic_cast<EnumInstType *>( varExpr->get_result() ); |
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| 171 | assertf( inst, "ArrayIterator given variable that isn't an enum constant : %s", toString( expr ).c_str() ); |
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| 172 | long long int value; |
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| 173 | if ( inst->baseEnum->valueOf( varExpr->var, value ) ) { |
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| 174 | index = value; |
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| 175 | } |
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[e4d829b] | 176 | } else if ( dynamic_cast< SizeofExpr * >( expr ) || dynamic_cast< AlignofExpr * >( expr ) ) { |
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| 177 | index = 0; // xxx - get actual sizeof/alignof value? |
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| 178 | } else { |
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| 179 | assertf( false, "bad designator given to ArrayIterator: %s", toString( expr ).c_str() ); |
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| 180 | } |
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| 181 | } |
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| 182 | |
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| 183 | virtual void setPosition( std::list< Expression * > & designators ) { |
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| 184 | if ( ! designators.empty() ) { |
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| 185 | setPosition( designators.front() ); |
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| 186 | designators.pop_front(); |
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| 187 | memberIter->setPosition( designators ); |
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| 188 | } |
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| 189 | } |
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| 190 | |
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| 191 | virtual std::list<InitAlternative> operator*() const { |
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| 192 | return first(); |
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| 193 | } |
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| 194 | |
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[4b97770] | 195 | virtual operator bool() const { return index < size; } |
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[e4d829b] | 196 | |
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| 197 | virtual MemberIterator & bigStep() { |
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| 198 | PRINT( std::cerr << "bigStep in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
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| 199 | ++index; |
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| 200 | delete memberIter; |
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[4b97770] | 201 | if ( index < size ) memberIter = createMemberIterator( base ); |
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[e4d829b] | 202 | else memberIter = nullptr; |
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| 203 | return *this; |
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| 204 | } |
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| 205 | |
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| 206 | virtual MemberIterator & smallStep() { |
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| 207 | PRINT( std::cerr << "smallStep in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
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| 208 | if ( memberIter ) { |
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| 209 | PRINT( std::cerr << "has member iter: " << *memberIter << std::endl; ) |
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| 210 | memberIter->smallStep(); |
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| 211 | if ( *memberIter ) { |
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| 212 | PRINT( std::cerr << "has valid member iter" << std::endl; ) |
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| 213 | return *this; |
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| 214 | } |
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| 215 | } |
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| 216 | return bigStep(); |
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| 217 | } |
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| 218 | |
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| 219 | virtual Type * getType() { return array; } |
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| 220 | virtual Type * getNext() { return base; } |
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| 221 | |
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| 222 | virtual std::list<InitAlternative> first() const { |
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| 223 | PRINT( std::cerr << "first in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
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| 224 | if ( memberIter && *memberIter ) { |
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| 225 | std::list<InitAlternative> ret = memberIter->first(); |
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| 226 | for ( InitAlternative & alt : ret ) { |
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| 227 | alt.designation->get_designators().push_front( new ConstantExpr( Constant::from_ulong( index ) ) ); |
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| 228 | } |
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| 229 | return ret; |
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| 230 | } |
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| 231 | return std::list<InitAlternative>(); |
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| 232 | } |
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| 233 | |
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| 234 | virtual void print( std::ostream & out, Indenter indent ) const { |
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| 235 | out << "ArrayIterator(Array of " << base << ")"; |
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| 236 | if ( memberIter ) { |
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| 237 | Indenter childIndent = indent+1; |
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| 238 | out << std::endl << childIndent; |
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| 239 | memberIter->print( out, childIndent ); |
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| 240 | } |
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| 241 | } |
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| 242 | |
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| 243 | private: |
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| 244 | ArrayType * array = nullptr; |
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| 245 | Type * base = nullptr; |
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| 246 | size_t index = 0; |
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| 247 | size_t size = 0; |
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| 248 | MemberIterator * memberIter = nullptr; |
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| 249 | }; |
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| 250 | |
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| 251 | class AggregateIterator : public MemberIterator { |
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| 252 | public: |
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[62423350] | 253 | typedef std::list<Declaration *> MemberList; |
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| 254 | typedef MemberList::const_iterator iterator; |
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| 255 | std::string kind = ""; // for debug |
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| 256 | std::string name; |
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| 257 | Type * inst = nullptr; |
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| 258 | const MemberList & members; |
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[e4d829b] | 259 | iterator curMember; |
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[62423350] | 260 | 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] | 261 | Type * curType = nullptr; |
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| 262 | MemberIterator * memberIter = nullptr; |
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[62423350] | 263 | mutable TypeSubstitution sub; |
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[e4d829b] | 264 | |
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[62423350] | 265 | 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] | 266 | PRINT( std::cerr << "Creating " << kind << "(" << name << ")"; ) |
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[e4d829b] | 267 | init(); |
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| 268 | } |
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| 269 | |
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| 270 | virtual ~AggregateIterator() { |
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| 271 | delete memberIter; |
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| 272 | } |
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| 273 | |
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| 274 | bool init() { |
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[62423350] | 275 | PRINT( std::cerr << "--init()--" << members.size() << std::endl; ) |
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| 276 | if ( curMember != members.end() ) { |
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[e4d829b] | 277 | if ( ObjectDecl * field = dynamic_cast< ObjectDecl * >( *curMember ) ) { |
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| 278 | PRINT( std::cerr << "incremented to field: " << field << std::endl; ) |
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| 279 | curType = field->get_type(); |
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| 280 | memberIter = createMemberIterator( curType ); |
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| 281 | return true; |
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| 282 | } |
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| 283 | } |
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| 284 | return false; |
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| 285 | } |
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| 286 | |
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| 287 | virtual std::list<InitAlternative> operator*() const { |
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| 288 | if (memberIter && *memberIter) { |
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| 289 | std::list<InitAlternative> ret = memberIter->first(); |
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[62423350] | 290 | PRINT( std::cerr << "sub: " << sub << std::endl; ) |
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[e4d829b] | 291 | for ( InitAlternative & alt : ret ) { |
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| 292 | PRINT( std::cerr << "iterating and adding designators" << std::endl; ) |
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[e3e16bc] | 293 | alt.designation->get_designators().push_front( new VariableExpr( strict_dynamic_cast< ObjectDecl * >( *curMember ) ) ); |
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[62423350] | 294 | // need to substitute for generic types, so that casts are to concrete types |
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| 295 | PRINT( std::cerr << " type is: " << alt.type; ) |
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| 296 | sub.apply( alt.type ); // also apply to designation?? |
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| 297 | PRINT( std::cerr << " ==> " << alt.type << std::endl; ) |
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[e4d829b] | 298 | } |
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| 299 | return ret; |
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| 300 | } |
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| 301 | return std::list<InitAlternative>(); |
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| 302 | } |
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| 303 | |
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| 304 | virtual void setPosition( std::list< Expression * > & designators ) { |
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| 305 | if ( ! designators.empty() ) { |
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| 306 | if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( designators.front() ) ) { |
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[62423350] | 307 | for ( curMember = members.begin(); curMember != members.end(); ++curMember ) { |
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[e4d829b] | 308 | if ( *curMember == varExpr->get_var() ) { |
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| 309 | designators.pop_front(); |
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| 310 | delete memberIter; |
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| 311 | memberIter = createMemberIterator( varExpr->get_result() ); |
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| 312 | curType = varExpr->get_result(); |
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[62423350] | 313 | atbegin = curMember == members.begin() && designators.empty(); // xxx - is this the right condition for atbegin?? |
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[e4d829b] | 314 | memberIter->setPosition( designators ); |
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| 315 | return; |
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| 316 | } // if |
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| 317 | } // for |
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[62423350] | 318 | assertf( false, "could not find member in %s: %s", kind.c_str(), toString( varExpr ).c_str() ); |
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[e4d829b] | 319 | } else { |
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[62423350] | 320 | assertf( false, "bad designator given to %s: %s", kind.c_str(), toString( designators.front() ).c_str() ); |
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[e4d829b] | 321 | } // if |
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| 322 | } // if |
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| 323 | } |
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| 324 | |
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| 325 | virtual MemberIterator & smallStep() { |
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| 326 | PRINT( std::cerr << "smallStep in " << kind << std::endl; ) |
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| 327 | atbegin = false; |
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| 328 | if ( memberIter ) { |
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| 329 | PRINT( std::cerr << "has member iter, incrementing..." << std::endl; ) |
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| 330 | memberIter->smallStep(); |
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| 331 | if ( *memberIter ) { |
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| 332 | PRINT( std::cerr << "success!" << std::endl; ) |
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| 333 | return *this; |
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| 334 | } |
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| 335 | } |
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| 336 | return bigStep(); |
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| 337 | } |
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| 338 | |
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| 339 | virtual Type * getType() { return inst; } |
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| 340 | virtual Type * getNext() { |
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| 341 | if ( memberIter && *memberIter ) return memberIter->getType(); // xxx - ??? recursive call??? |
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| 342 | return nullptr; |
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| 343 | } |
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| 344 | |
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| 345 | virtual std::list<InitAlternative> first() const { |
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| 346 | std::list<InitAlternative> ret; |
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| 347 | PRINT( std::cerr << "first " << kind << std::endl; ) |
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| 348 | if ( memberIter && *memberIter ) { // might not need *memberIter?? |
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| 349 | PRINT( std::cerr << "adding children" << std::endl; ) |
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| 350 | ret = memberIter->first(); |
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| 351 | for ( InitAlternative & alt : ret ) { |
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| 352 | PRINT( std::cerr << "iterating and adding designators" << std::endl; ) |
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[e3e16bc] | 353 | alt.designation->get_designators().push_front( new VariableExpr( strict_dynamic_cast< ObjectDecl * >( *curMember ) ) ); |
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[e4d829b] | 354 | } |
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| 355 | } |
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| 356 | // if ( curMember == std::next( decl->get_members().begin(), 1 ) ) { // xxx - this never triggers because curMember is incremented immediately on construction |
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| 357 | if ( atbegin ) { // xxx - this never triggers because curMember is incremented immediately on construction |
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| 358 | // xxx - what about case of empty struct?? |
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| 359 | // only add self if at the very beginning of the structure |
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| 360 | PRINT( std::cerr << "adding self" << std::endl; ) |
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| 361 | ret.push_front( { inst->clone(), new Designation( {} ) } ); |
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| 362 | } |
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| 363 | return ret; |
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| 364 | } |
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| 365 | |
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| 366 | virtual void print( std::ostream & out, Indenter indent ) const { |
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[62423350] | 367 | out << kind << "(" << name << ")"; |
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[e4d829b] | 368 | if ( memberIter ) { |
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| 369 | Indenter childIndent = indent+1; |
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| 370 | out << std::endl << childIndent; |
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| 371 | memberIter->print( out, childIndent ); |
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| 372 | } |
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| 373 | } |
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| 374 | }; |
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| 375 | |
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| 376 | class UnionIterator : public AggregateIterator { |
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| 377 | public: |
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[62423350] | 378 | UnionIterator( UnionInstType * inst ) : AggregateIterator( "UnionIterator", inst->get_name(), inst, inst->get_baseUnion()->get_members() ) {} |
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[e4d829b] | 379 | |
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| 380 | virtual operator bool() const { return (memberIter && *memberIter); } |
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| 381 | virtual MemberIterator & bigStep() { |
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| 382 | // unions only initialize one member |
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| 383 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
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| 384 | atbegin = false; |
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| 385 | delete memberIter; |
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| 386 | memberIter = nullptr; |
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| 387 | curType = nullptr; |
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[62423350] | 388 | curMember = members.end(); |
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[e4d829b] | 389 | return *this; |
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| 390 | } |
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| 391 | virtual std::list<InitAlternative> first() const { return std::list<InitAlternative>{}; } |
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| 392 | }; |
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| 393 | |
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| 394 | class StructIterator : public AggregateIterator { |
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| 395 | public: |
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[62423350] | 396 | StructIterator( StructInstType * inst ) : AggregateIterator( "StructIterator", inst->get_name(), inst, inst->get_baseStruct()->get_members() ) {} |
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| 397 | |
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| 398 | virtual operator bool() const { return curMember != members.end() || (memberIter && *memberIter); } |
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| 399 | |
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| 400 | virtual MemberIterator & bigStep() { |
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| 401 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
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| 402 | atbegin = false; |
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| 403 | delete memberIter; |
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| 404 | memberIter = nullptr; |
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| 405 | curType = nullptr; |
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| 406 | for ( ; curMember != members.end(); ) { |
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| 407 | ++curMember; |
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| 408 | if ( init() ) { |
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| 409 | return *this; |
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| 410 | } |
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| 411 | } |
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| 412 | return *this; |
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| 413 | } |
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| 414 | }; |
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| 415 | |
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| 416 | class TupleIterator : public AggregateIterator { |
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| 417 | public: |
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| 418 | TupleIterator( TupleType * inst ) : AggregateIterator( "TupleIterator", toString("Tuple", inst->size()), inst, inst->get_members() ) {} |
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[e4d829b] | 419 | |
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[62423350] | 420 | virtual operator bool() const { return curMember != members.end() || (memberIter && *memberIter); } |
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[e4d829b] | 421 | |
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| 422 | virtual MemberIterator & bigStep() { |
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| 423 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
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| 424 | atbegin = false; |
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| 425 | delete memberIter; |
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| 426 | memberIter = nullptr; |
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| 427 | curType = nullptr; |
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[62423350] | 428 | for ( ; curMember != members.end(); ) { |
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[e4d829b] | 429 | ++curMember; |
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| 430 | if ( init() ) { |
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| 431 | return *this; |
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| 432 | } |
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| 433 | } |
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| 434 | return *this; |
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| 435 | } |
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| 436 | }; |
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| 437 | |
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| 438 | MemberIterator * createMemberIterator( Type * type ) { |
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| 439 | if ( ReferenceToType * aggr = dynamic_cast< ReferenceToType * >( type ) ) { |
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| 440 | if ( StructInstType * sit = dynamic_cast< StructInstType * >( aggr ) ) { |
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| 441 | return new StructIterator( sit ); |
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| 442 | } else if ( UnionInstType * uit = dynamic_cast< UnionInstType * >( aggr ) ) { |
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| 443 | return new UnionIterator( uit ); |
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| 444 | } else { |
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[62423350] | 445 | assertf( dynamic_cast< TypeInstType * >( type ), "some other reftotype" ); |
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| 446 | return new SimpleIterator( type ); |
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[e4d829b] | 447 | } |
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| 448 | } else if ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) { |
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| 449 | return new ArrayIterator( at ); |
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[62423350] | 450 | } else if ( TupleType * tt = dynamic_cast< TupleType * >( type ) ) { |
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| 451 | return new TupleIterator( tt ); |
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[e4d829b] | 452 | } else { |
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| 453 | return new SimpleIterator( type ); |
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| 454 | } |
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| 455 | } |
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| 456 | |
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| 457 | CurrentObject::CurrentObject() {} |
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| 458 | CurrentObject::CurrentObject( Type * type ) { |
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| 459 | objStack.push( new SimpleIterator( type ) ); |
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| 460 | } |
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| 461 | |
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| 462 | |
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| 463 | void CurrentObject::setNext( Designation * designation ) { |
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| 464 | assertf( ! objStack.empty(), "obj stack empty in setNext" ); |
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| 465 | PRINT( std::cerr << "____setNext" << designation << std::endl; ) |
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| 466 | objStack.top()->setPosition( designation->get_designators() ); |
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| 467 | } |
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| 468 | |
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| 469 | Designation * CurrentObject::findNext( Designation * designation ) { |
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| 470 | typedef std::list< Expression * > DesignatorChain; |
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| 471 | PRINT( std::cerr << "___findNext" << std::endl; ) |
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| 472 | // find all the d's |
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| 473 | std::list<DesignatorChain> desigAlts{ { } }, newDesigAlts; |
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| 474 | std::list<Type *> curTypes { (objStack.top())->getType() }, newTypes; |
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| 475 | for ( Expression * expr : designation->get_designators() ) { |
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| 476 | PRINT( std::cerr << "____untyped: " << expr << std::endl; ) |
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| 477 | std::list<DesignatorChain>::iterator dit = desigAlts.begin(); |
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| 478 | if ( NameExpr * nexpr = dynamic_cast<NameExpr *>(expr) ) { |
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| 479 | for ( Type * t : curTypes ) { |
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| 480 | assert( dit != desigAlts.end() ); |
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| 481 | DesignatorChain & d = *dit; |
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| 482 | PRINT( std::cerr << "____actual: " << t << std::endl; ) |
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| 483 | ReferenceToType * refType = dynamic_cast<ReferenceToType *>(t); |
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| 484 | std::list<Declaration *> members; |
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| 485 | if ( refType ) { |
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| 486 | refType->lookup( nexpr->get_name(), members ); // concatenate identical field name |
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| 487 | // xxx - need to also include anonymous members in this somehow... |
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| 488 | for ( Declaration * mem: members ) { |
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| 489 | if ( ObjectDecl * field = dynamic_cast<ObjectDecl *>(mem) ) { |
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| 490 | PRINT( std::cerr << "____alt: " << field->get_type() << std::endl; ) |
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| 491 | DesignatorChain newD = d; |
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| 492 | newD.push_back( new VariableExpr( field ) ); |
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| 493 | newDesigAlts.push_back( newD ); |
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| 494 | newTypes.push_back( field->get_type() ); |
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| 495 | } // if |
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| 496 | } // for |
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| 497 | } // if |
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| 498 | ++dit; |
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| 499 | } // for |
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| 500 | } else { |
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| 501 | for ( Type * t : curTypes ) { |
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| 502 | assert( dit != desigAlts.end() ); |
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| 503 | DesignatorChain & d = *dit; |
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| 504 | if ( ArrayType * at = dynamic_cast< ArrayType * > ( t ) ) { |
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| 505 | PRINT( std::cerr << "____alt: " << at->get_base() << std::endl; ) |
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| 506 | d.push_back( expr ); |
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| 507 | newDesigAlts.push_back( d ); |
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| 508 | newTypes.push_back( at->get_base() ); |
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| 509 | } |
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| 510 | ++dit; |
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| 511 | } // for |
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| 512 | } // if |
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| 513 | desigAlts = newDesigAlts; |
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| 514 | newDesigAlts.clear(); |
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| 515 | curTypes = newTypes; |
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| 516 | newTypes.clear(); |
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[56e49b0] | 517 | assertf( desigAlts.size() == curTypes.size(), "Designator alternatives (%zu) and current types (%zu) out of sync", desigAlts.size(), curTypes.size() ); |
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[e4d829b] | 518 | } // for |
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| 519 | if ( desigAlts.size() > 1 ) { |
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| 520 | throw SemanticError( toString("Too many alternatives (", desigAlts.size(), ") for designation: "), designation ); |
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| 521 | } else if ( desigAlts.size() == 0 ) { |
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| 522 | throw SemanticError( "No reasonable alternatives for designation: ", designation ); |
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| 523 | } |
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| 524 | DesignatorChain & d = desigAlts.back(); |
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| 525 | PRINT( for ( Expression * expr : d ) { |
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| 526 | std::cerr << "____desig: " << expr << std::endl; |
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| 527 | } ) // for |
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| 528 | assertf( ! curTypes.empty(), "empty designator chosen"); |
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| 529 | |
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| 530 | // set new designators |
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| 531 | assertf( ! objStack.empty(), "empty object stack when setting designation" ); |
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| 532 | Designation * actualDesignation = new Designation( d ); |
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| 533 | objStack.top()->setPosition( d ); // destroys d |
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| 534 | return actualDesignation; |
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| 535 | } |
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| 536 | |
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| 537 | void CurrentObject::increment() { |
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| 538 | PRINT( std::cerr << "____increment" << std::endl; ) |
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| 539 | if ( ! objStack.empty() ) { |
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| 540 | PRINT( std::cerr << *objStack.top() << std::endl; ) |
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| 541 | objStack.top()->smallStep(); |
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| 542 | } |
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| 543 | } |
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| 544 | |
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| 545 | void CurrentObject::enterListInit() { |
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| 546 | PRINT( std::cerr << "____entering list init" << std::endl; ) |
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| 547 | assertf( ! objStack.empty(), "empty obj stack entering list init" ); |
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| 548 | Type * type = objStack.top()->getNext(); |
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| 549 | if ( type ) { |
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| 550 | objStack.push( createMemberIterator( type ) ); |
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| 551 | } else { |
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| 552 | assertf( false, "not sure about this case..." ); |
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| 553 | } |
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| 554 | } |
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| 555 | |
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| 556 | void CurrentObject::exitListInit() { |
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| 557 | PRINT( std::cerr << "____exiting list init" << std::endl; ) |
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| 558 | assertf( ! objStack.empty(), "objstack empty" ); |
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| 559 | delete objStack.top(); |
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| 560 | objStack.pop(); |
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| 561 | if ( ! objStack.empty() ) { |
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| 562 | PRINT( std::cerr << *objStack.top() << std::endl; ) |
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| 563 | objStack.top()->bigStep(); |
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| 564 | } |
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| 565 | } |
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| 566 | |
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| 567 | std::list< InitAlternative > CurrentObject::getOptions() { |
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| 568 | PRINT( std::cerr << "____getting current options" << std::endl; ) |
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| 569 | assertf( ! objStack.empty(), "objstack empty in getOptions" ); |
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| 570 | return **objStack.top(); |
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| 571 | } |
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[62423350] | 572 | |
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| 573 | Type * CurrentObject::getCurrentType() { |
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| 574 | PRINT( std::cerr << "____getting current type" << std::endl; ) |
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| 575 | assertf( ! objStack.empty(), "objstack empty in getCurrentType" ); |
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| 576 | return objStack.top()->getNext(); |
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| 577 | } |
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[e4d829b] | 578 | } // namespace ResolvExpr |
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| 579 | |
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| 580 | // Local Variables: // |
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| 581 | // tab-width: 4 // |
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| 582 | // mode: c++ // |
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| 583 | // compile-command: "make install" // |
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| 584 | // End: // |
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