[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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| 16 | #include <stack> |
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| 17 | #include <iostream> |
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| 18 | |
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| 19 | #include "CurrentObject.h" |
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| 20 | |
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| 21 | #include "SynTree/Declaration.h" |
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| 22 | #include "SynTree/Initializer.h" |
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| 23 | #include "SynTree/Type.h" |
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[62423350] | 24 | #include "SynTree/TypeSubstitution.h" |
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[e4d829b] | 25 | |
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| 26 | #if 0 |
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| 27 | #define PRINT(x) x |
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| 28 | #else |
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| 29 | #define PRINT(x) |
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| 30 | #endif |
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| 31 | |
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| 32 | namespace ResolvExpr { |
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| 33 | long long int getConstValue( ConstantExpr * constExpr ) { |
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| 34 | if ( BasicType * basicType = dynamic_cast< BasicType * >( constExpr->get_result() ) ) { |
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[62423350] | 35 | if ( basicType->isInteger() ) { |
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| 36 | return constExpr->get_constant()->get_ival(); |
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[e4d829b] | 37 | } else { |
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[62423350] | 38 | assertf( false, "Non-integer constant expression in getConstValue", toString( constExpr ).c_str() ); // xxx - might be semantic error |
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[e4d829b] | 39 | } |
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[62423350] | 40 | } else if ( dynamic_cast< OneType * >( constExpr->get_result() ) ) { |
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| 41 | return 1; |
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| 42 | } else if ( dynamic_cast< ZeroType * >( constExpr->get_result() ) ) { |
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| 43 | return 0; |
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[e4d829b] | 44 | } else { |
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[62423350] | 45 | assertf( false, "unhandled type on getConstValue %s", toString( constExpr->get_result() ).c_str() ); // xxx - might be semantic error |
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[e4d829b] | 46 | } |
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| 47 | } |
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| 48 | |
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| 49 | struct Indenter { |
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| 50 | static const int amt = 2; |
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| 51 | unsigned int indent = 0; |
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| 52 | |
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| 53 | Indenter & operator+=(int nlevels) { indent += amt*nlevels; return *this; } |
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| 54 | Indenter & operator-=(int nlevels) { indent -= amt*nlevels; return *this; } |
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| 55 | Indenter operator+(int nlevels) { Indenter indenter = *this; return indenter += nlevels; } |
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| 56 | Indenter operator-(int nlevels) { Indenter indenter = *this; return indenter -= nlevels; } |
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| 57 | Indenter & operator++() { return *this += 1; } |
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| 58 | Indenter & operator--() { return *this -= 1; } |
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| 59 | }; |
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| 60 | std::ostream & operator<<( std::ostream & out, Indenter & indent ) { |
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| 61 | return out << std::string(indent.indent, ' '); |
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| 62 | } |
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| 63 | |
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[62423350] | 64 | template< typename AggrInst > |
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| 65 | TypeSubstitution makeGenericSubstitution( AggrInst * inst ) { |
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| 66 | assert( inst ); |
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| 67 | assert( inst->get_baseParameters() ); |
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| 68 | std::list< TypeDecl * > baseParams = *inst->get_baseParameters(); |
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| 69 | std::list< Expression * > typeSubs = inst->get_parameters(); |
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| 70 | TypeSubstitution subs( baseParams.begin(), baseParams.end(), typeSubs.begin() ); |
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| 71 | return subs; |
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| 72 | } |
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| 73 | |
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| 74 | TypeSubstitution makeGenericSubstitution( Type * type ) { |
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| 75 | if ( StructInstType * inst = dynamic_cast< StructInstType * >( type ) ) { |
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| 76 | return makeGenericSubstitution( inst ); |
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| 77 | } else if ( UnionInstType * inst = dynamic_cast< UnionInstType * >( type ) ) { |
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| 78 | return makeGenericSubstitution( inst ); |
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| 79 | } else { |
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| 80 | return TypeSubstitution(); |
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| 81 | } |
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| 82 | } |
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| 83 | |
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[e4d829b] | 84 | class MemberIterator { |
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| 85 | public: |
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| 86 | virtual ~MemberIterator() {} |
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| 87 | |
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| 88 | virtual void setPosition( std::list< Expression * > & designators ) = 0; |
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| 89 | virtual std::list<InitAlternative> operator*() const = 0; |
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| 90 | virtual operator bool() const = 0; |
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| 91 | virtual MemberIterator & bigStep() = 0; |
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| 92 | virtual MemberIterator & smallStep() = 0; |
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| 93 | virtual Type * getType() = 0; |
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| 94 | virtual Type * getNext() = 0; |
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| 95 | |
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| 96 | virtual void print( std::ostream & out, Indenter indent ) const = 0; |
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| 97 | |
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| 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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| 149 | base = at->get_base(); |
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| 150 | memberIter = createMemberIterator( base ); |
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| 151 | setSize( at->get_dimension() ); |
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| 152 | } |
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| 153 | |
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| 154 | ~ArrayIterator() { |
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| 155 | delete memberIter; |
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| 156 | } |
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| 157 | |
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| 158 | private: |
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| 159 | void setSize( Expression * expr ) { |
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| 160 | if ( ConstantExpr * constExpr = dynamic_cast< ConstantExpr * >( expr ) ) { |
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[62423350] | 161 | size = getConstValue( constExpr ); |
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[e4d829b] | 162 | PRINT( std::cerr << "array type with size: " << size << std::endl; ) |
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| 163 | } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) { |
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[62423350] | 164 | setSize( castExpr->get_arg() ); // xxx - need to perform the conversion specified by the cast |
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[e4d829b] | 165 | } else { |
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[62423350] | 166 | 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] | 167 | } |
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| 168 | } |
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| 169 | |
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| 170 | public: |
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| 171 | void setPosition( Expression * expr ) { |
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| 172 | // need to permit integer-constant-expressions, including: integer constants, enumeration constants, character constants, sizeof expressions, _Alignof expressions, cast expressions |
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| 173 | if ( ConstantExpr * constExpr = dynamic_cast< ConstantExpr * >( expr ) ) { |
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| 174 | index = getConstValue( constExpr ); |
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| 175 | } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) { |
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| 176 | setPosition( castExpr->get_arg() ); |
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| 177 | } else if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( expr ) ) { |
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| 178 | assertf( dynamic_cast<EnumInstType *> ( varExpr->get_result() ), "ArrayIterator given variable that isn't an enum constant", toString( expr ).c_str() ); |
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| 179 | index = 0; // xxx - get actual value of enum constant |
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| 180 | } else if ( dynamic_cast< SizeofExpr * >( expr ) || dynamic_cast< AlignofExpr * >( expr ) ) { |
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| 181 | index = 0; // xxx - get actual sizeof/alignof value? |
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| 182 | } else { |
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| 183 | assertf( false, "bad designator given to ArrayIterator: %s", toString( expr ).c_str() ); |
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| 184 | } |
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| 185 | } |
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| 186 | |
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| 187 | virtual void setPosition( std::list< Expression * > & designators ) { |
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| 188 | if ( ! designators.empty() ) { |
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| 189 | setPosition( designators.front() ); |
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| 190 | designators.pop_front(); |
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| 191 | memberIter->setPosition( designators ); |
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| 192 | } |
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| 193 | } |
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| 194 | |
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| 195 | virtual std::list<InitAlternative> operator*() const { |
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| 196 | return first(); |
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| 197 | } |
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| 198 | |
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| 199 | virtual operator bool() const { return index < size; } |
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| 200 | |
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| 201 | virtual MemberIterator & bigStep() { |
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| 202 | PRINT( std::cerr << "bigStep in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
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| 203 | ++index; |
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| 204 | delete memberIter; |
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| 205 | if ( index < size ) memberIter = createMemberIterator( base ); |
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| 206 | else memberIter = nullptr; |
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| 207 | return *this; |
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| 208 | } |
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| 209 | |
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| 210 | virtual MemberIterator & smallStep() { |
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| 211 | PRINT( std::cerr << "smallStep in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
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| 212 | if ( memberIter ) { |
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| 213 | PRINT( std::cerr << "has member iter: " << *memberIter << std::endl; ) |
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| 214 | memberIter->smallStep(); |
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| 215 | if ( *memberIter ) { |
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| 216 | PRINT( std::cerr << "has valid member iter" << std::endl; ) |
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| 217 | return *this; |
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| 218 | } |
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| 219 | } |
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| 220 | return bigStep(); |
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| 221 | } |
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| 222 | |
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| 223 | virtual Type * getType() { return array; } |
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| 224 | virtual Type * getNext() { return base; } |
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| 225 | |
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| 226 | virtual std::list<InitAlternative> first() const { |
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| 227 | PRINT( std::cerr << "first in ArrayIterator (" << index << "/" << size << ")" << std::endl; ) |
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| 228 | if ( memberIter && *memberIter ) { |
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| 229 | std::list<InitAlternative> ret = memberIter->first(); |
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| 230 | for ( InitAlternative & alt : ret ) { |
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| 231 | alt.designation->get_designators().push_front( new ConstantExpr( Constant::from_ulong( index ) ) ); |
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| 232 | } |
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| 233 | return ret; |
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| 234 | } |
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| 235 | return std::list<InitAlternative>(); |
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| 236 | } |
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| 237 | |
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| 238 | virtual void print( std::ostream & out, Indenter indent ) const { |
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| 239 | out << "ArrayIterator(Array of " << base << ")"; |
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| 240 | if ( memberIter ) { |
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| 241 | Indenter childIndent = indent+1; |
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| 242 | out << std::endl << childIndent; |
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| 243 | memberIter->print( out, childIndent ); |
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| 244 | } |
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| 245 | } |
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| 246 | |
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| 247 | private: |
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| 248 | ArrayType * array = nullptr; |
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| 249 | Type * base = nullptr; |
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| 250 | size_t index = 0; |
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| 251 | size_t size = 0; |
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| 252 | MemberIterator * memberIter = nullptr; |
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| 253 | }; |
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| 254 | |
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| 255 | class AggregateIterator : public MemberIterator { |
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| 256 | public: |
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[62423350] | 257 | typedef std::list<Declaration *> MemberList; |
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| 258 | typedef MemberList::const_iterator iterator; |
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| 259 | std::string kind = ""; // for debug |
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| 260 | std::string name; |
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| 261 | Type * inst = nullptr; |
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| 262 | const MemberList & members; |
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[e4d829b] | 263 | iterator curMember; |
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[62423350] | 264 | 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] | 265 | Type * curType = nullptr; |
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| 266 | MemberIterator * memberIter = nullptr; |
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[62423350] | 267 | mutable TypeSubstitution sub; |
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[e4d829b] | 268 | |
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[62423350] | 269 | 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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[e4d829b] | 270 | init(); |
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| 271 | } |
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| 272 | |
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| 273 | virtual ~AggregateIterator() { |
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| 274 | delete memberIter; |
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| 275 | } |
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| 276 | |
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| 277 | bool init() { |
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[62423350] | 278 | PRINT( std::cerr << "--init()--" << members.size() << std::endl; ) |
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| 279 | if ( curMember != members.end() ) { |
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[e4d829b] | 280 | if ( ObjectDecl * field = dynamic_cast< ObjectDecl * >( *curMember ) ) { |
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| 281 | PRINT( std::cerr << "incremented to field: " << field << std::endl; ) |
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| 282 | curType = field->get_type(); |
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| 283 | memberIter = createMemberIterator( curType ); |
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| 284 | return true; |
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| 285 | } |
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| 286 | } |
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| 287 | return false; |
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| 288 | } |
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| 289 | |
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| 290 | virtual std::list<InitAlternative> operator*() const { |
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| 291 | if (memberIter && *memberIter) { |
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| 292 | std::list<InitAlternative> ret = memberIter->first(); |
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[62423350] | 293 | PRINT( std::cerr << "sub: " << sub << std::endl; ) |
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[e4d829b] | 294 | for ( InitAlternative & alt : ret ) { |
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| 295 | PRINT( std::cerr << "iterating and adding designators" << std::endl; ) |
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| 296 | alt.designation->get_designators().push_front( new VariableExpr( safe_dynamic_cast< ObjectDecl * >( *curMember ) ) ); |
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[62423350] | 297 | // need to substitute for generic types, so that casts are to concrete types |
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| 298 | PRINT( std::cerr << " type is: " << alt.type; ) |
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| 299 | sub.apply( alt.type ); // also apply to designation?? |
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| 300 | PRINT( std::cerr << " ==> " << alt.type << std::endl; ) |
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[e4d829b] | 301 | } |
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| 302 | return ret; |
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| 303 | } |
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| 304 | return std::list<InitAlternative>(); |
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| 305 | } |
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| 306 | |
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| 307 | virtual void setPosition( std::list< Expression * > & designators ) { |
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| 308 | if ( ! designators.empty() ) { |
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| 309 | if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( designators.front() ) ) { |
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[62423350] | 310 | for ( curMember = members.begin(); curMember != members.end(); ++curMember ) { |
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[e4d829b] | 311 | if ( *curMember == varExpr->get_var() ) { |
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| 312 | designators.pop_front(); |
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| 313 | delete memberIter; |
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| 314 | memberIter = createMemberIterator( varExpr->get_result() ); |
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| 315 | curType = varExpr->get_result(); |
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[62423350] | 316 | atbegin = curMember == members.begin() && designators.empty(); // xxx - is this the right condition for atbegin?? |
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[e4d829b] | 317 | memberIter->setPosition( designators ); |
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| 318 | return; |
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| 319 | } // if |
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| 320 | } // for |
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[62423350] | 321 | assertf( false, "could not find member in %s: %s", kind.c_str(), toString( varExpr ).c_str() ); |
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[e4d829b] | 322 | } else { |
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[62423350] | 323 | assertf( false, "bad designator given to %s: %s", kind.c_str(), toString( designators.front() ).c_str() ); |
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[e4d829b] | 324 | } // if |
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| 325 | } // if |
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| 326 | } |
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| 327 | |
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| 328 | virtual MemberIterator & smallStep() { |
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| 329 | PRINT( std::cerr << "smallStep in " << kind << std::endl; ) |
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| 330 | atbegin = false; |
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| 331 | if ( memberIter ) { |
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| 332 | PRINT( std::cerr << "has member iter, incrementing..." << std::endl; ) |
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| 333 | memberIter->smallStep(); |
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| 334 | if ( *memberIter ) { |
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| 335 | PRINT( std::cerr << "success!" << std::endl; ) |
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| 336 | return *this; |
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| 337 | } |
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| 338 | } |
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| 339 | return bigStep(); |
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| 340 | } |
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| 341 | |
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| 342 | virtual Type * getType() { return inst; } |
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| 343 | virtual Type * getNext() { |
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| 344 | if ( memberIter && *memberIter ) return memberIter->getType(); // xxx - ??? recursive call??? |
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| 345 | return nullptr; |
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| 346 | } |
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| 347 | |
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| 348 | virtual std::list<InitAlternative> first() const { |
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| 349 | std::list<InitAlternative> ret; |
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| 350 | PRINT( std::cerr << "first " << kind << std::endl; ) |
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| 351 | if ( memberIter && *memberIter ) { // might not need *memberIter?? |
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| 352 | PRINT( std::cerr << "adding children" << std::endl; ) |
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| 353 | ret = memberIter->first(); |
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| 354 | for ( InitAlternative & alt : ret ) { |
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| 355 | PRINT( std::cerr << "iterating and adding designators" << std::endl; ) |
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| 356 | alt.designation->get_designators().push_front( new VariableExpr( safe_dynamic_cast< ObjectDecl * >( *curMember ) ) ); |
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| 357 | } |
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| 358 | } |
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| 359 | // if ( curMember == std::next( decl->get_members().begin(), 1 ) ) { // xxx - this never triggers because curMember is incremented immediately on construction |
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| 360 | if ( atbegin ) { // xxx - this never triggers because curMember is incremented immediately on construction |
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| 361 | // xxx - what about case of empty struct?? |
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| 362 | // only add self if at the very beginning of the structure |
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| 363 | PRINT( std::cerr << "adding self" << std::endl; ) |
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| 364 | ret.push_front( { inst->clone(), new Designation( {} ) } ); |
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| 365 | } |
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| 366 | return ret; |
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| 367 | } |
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| 368 | |
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| 369 | virtual void print( std::ostream & out, Indenter indent ) const { |
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[62423350] | 370 | out << kind << "(" << name << ")"; |
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[e4d829b] | 371 | if ( memberIter ) { |
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| 372 | Indenter childIndent = indent+1; |
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| 373 | out << std::endl << childIndent; |
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| 374 | memberIter->print( out, childIndent ); |
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| 375 | } |
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| 376 | } |
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| 377 | }; |
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| 378 | |
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| 379 | class UnionIterator : public AggregateIterator { |
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| 380 | public: |
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[62423350] | 381 | UnionIterator( UnionInstType * inst ) : AggregateIterator( "UnionIterator", inst->get_name(), inst, inst->get_baseUnion()->get_members() ) {} |
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[e4d829b] | 382 | |
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| 383 | virtual operator bool() const { return (memberIter && *memberIter); } |
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| 384 | virtual MemberIterator & bigStep() { |
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| 385 | // unions only initialize one member |
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| 386 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
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| 387 | atbegin = false; |
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| 388 | delete memberIter; |
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| 389 | memberIter = nullptr; |
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| 390 | curType = nullptr; |
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[62423350] | 391 | curMember = members.end(); |
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[e4d829b] | 392 | return *this; |
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| 393 | } |
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| 394 | virtual std::list<InitAlternative> first() const { return std::list<InitAlternative>{}; } |
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| 395 | }; |
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| 396 | |
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| 397 | class StructIterator : public AggregateIterator { |
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| 398 | public: |
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[62423350] | 399 | StructIterator( StructInstType * inst ) : AggregateIterator( "StructIterator", inst->get_name(), inst, inst->get_baseStruct()->get_members() ) {} |
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| 400 | |
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| 401 | virtual operator bool() const { return curMember != members.end() || (memberIter && *memberIter); } |
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| 402 | |
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| 403 | virtual MemberIterator & bigStep() { |
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| 404 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
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| 405 | atbegin = false; |
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| 406 | delete memberIter; |
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| 407 | memberIter = nullptr; |
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| 408 | curType = nullptr; |
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| 409 | for ( ; curMember != members.end(); ) { |
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| 410 | ++curMember; |
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| 411 | if ( init() ) { |
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| 412 | return *this; |
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| 413 | } |
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| 414 | } |
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| 415 | return *this; |
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| 416 | } |
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| 417 | }; |
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| 418 | |
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| 419 | class TupleIterator : public AggregateIterator { |
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| 420 | public: |
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| 421 | TupleIterator( TupleType * inst ) : AggregateIterator( "TupleIterator", toString("Tuple", inst->size()), inst, inst->get_members() ) {} |
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[e4d829b] | 422 | |
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[62423350] | 423 | virtual operator bool() const { return curMember != members.end() || (memberIter && *memberIter); } |
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[e4d829b] | 424 | |
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| 425 | virtual MemberIterator & bigStep() { |
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| 426 | PRINT( std::cerr << "bigStep in " << kind << std::endl; ) |
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| 427 | atbegin = false; |
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| 428 | delete memberIter; |
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| 429 | memberIter = nullptr; |
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| 430 | curType = nullptr; |
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[62423350] | 431 | for ( ; curMember != members.end(); ) { |
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[e4d829b] | 432 | ++curMember; |
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| 433 | if ( init() ) { |
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| 434 | return *this; |
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| 435 | } |
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| 436 | } |
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| 437 | return *this; |
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| 438 | } |
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| 439 | }; |
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| 440 | |
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| 441 | MemberIterator * createMemberIterator( Type * type ) { |
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| 442 | if ( ReferenceToType * aggr = dynamic_cast< ReferenceToType * >( type ) ) { |
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| 443 | if ( StructInstType * sit = dynamic_cast< StructInstType * >( aggr ) ) { |
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| 444 | return new StructIterator( sit ); |
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| 445 | } else if ( UnionInstType * uit = dynamic_cast< UnionInstType * >( aggr ) ) { |
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| 446 | return new UnionIterator( uit ); |
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| 447 | } else { |
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[62423350] | 448 | assertf( dynamic_cast< TypeInstType * >( type ), "some other reftotype" ); |
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| 449 | return new SimpleIterator( type ); |
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[e4d829b] | 450 | } |
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| 451 | } else if ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) { |
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| 452 | return new ArrayIterator( at ); |
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[62423350] | 453 | } else if ( TupleType * tt = dynamic_cast< TupleType * >( type ) ) { |
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| 454 | return new TupleIterator( tt ); |
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[e4d829b] | 455 | } else { |
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| 456 | return new SimpleIterator( type ); |
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| 457 | } |
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| 458 | } |
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| 459 | |
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| 460 | CurrentObject::CurrentObject() {} |
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| 461 | CurrentObject::CurrentObject( Type * type ) { |
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| 462 | objStack.push( new SimpleIterator( type ) ); |
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| 463 | } |
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| 464 | |
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| 465 | |
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| 466 | void CurrentObject::setNext( Designation * designation ) { |
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| 467 | assertf( ! objStack.empty(), "obj stack empty in setNext" ); |
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| 468 | PRINT( std::cerr << "____setNext" << designation << std::endl; ) |
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| 469 | objStack.top()->setPosition( designation->get_designators() ); |
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| 470 | } |
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| 471 | |
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| 472 | Designation * CurrentObject::findNext( Designation * designation ) { |
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| 473 | typedef std::list< Expression * > DesignatorChain; |
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| 474 | PRINT( std::cerr << "___findNext" << std::endl; ) |
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| 475 | // find all the d's |
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| 476 | std::list<DesignatorChain> desigAlts{ { } }, newDesigAlts; |
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| 477 | std::list<Type *> curTypes { (objStack.top())->getType() }, newTypes; |
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| 478 | for ( Expression * expr : designation->get_designators() ) { |
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| 479 | PRINT( std::cerr << "____untyped: " << expr << std::endl; ) |
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| 480 | std::list<DesignatorChain>::iterator dit = desigAlts.begin(); |
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| 481 | if ( NameExpr * nexpr = dynamic_cast<NameExpr *>(expr) ) { |
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| 482 | for ( Type * t : curTypes ) { |
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| 483 | assert( dit != desigAlts.end() ); |
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| 484 | DesignatorChain & d = *dit; |
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| 485 | PRINT( std::cerr << "____actual: " << t << std::endl; ) |
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| 486 | ReferenceToType * refType = dynamic_cast<ReferenceToType *>(t); |
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| 487 | std::list<Declaration *> members; |
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| 488 | if ( refType ) { |
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| 489 | refType->lookup( nexpr->get_name(), members ); // concatenate identical field name |
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| 490 | // xxx - need to also include anonymous members in this somehow... |
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| 491 | for ( Declaration * mem: members ) { |
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| 492 | if ( ObjectDecl * field = dynamic_cast<ObjectDecl *>(mem) ) { |
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| 493 | PRINT( std::cerr << "____alt: " << field->get_type() << std::endl; ) |
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| 494 | DesignatorChain newD = d; |
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| 495 | newD.push_back( new VariableExpr( field ) ); |
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| 496 | newDesigAlts.push_back( newD ); |
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| 497 | newTypes.push_back( field->get_type() ); |
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| 498 | } // if |
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| 499 | } // for |
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| 500 | } // if |
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| 501 | ++dit; |
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| 502 | } // for |
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| 503 | } else { |
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| 504 | for ( Type * t : curTypes ) { |
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| 505 | assert( dit != desigAlts.end() ); |
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| 506 | DesignatorChain & d = *dit; |
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| 507 | if ( ArrayType * at = dynamic_cast< ArrayType * > ( t ) ) { |
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| 508 | PRINT( std::cerr << "____alt: " << at->get_base() << std::endl; ) |
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| 509 | d.push_back( expr ); |
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| 510 | newDesigAlts.push_back( d ); |
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| 511 | newTypes.push_back( at->get_base() ); |
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| 512 | } |
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| 513 | ++dit; |
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| 514 | } // for |
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| 515 | } // if |
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| 516 | desigAlts = newDesigAlts; |
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| 517 | newDesigAlts.clear(); |
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| 518 | curTypes = newTypes; |
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| 519 | newTypes.clear(); |
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| 520 | assertf( desigAlts.size() == curTypes.size(), "Designator alternatives (%d) and current types (%d) out of sync", desigAlts.size(), curTypes.size() ); |
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| 521 | } // for |
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| 522 | if ( desigAlts.size() > 1 ) { |
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| 523 | throw SemanticError( toString("Too many alternatives (", desigAlts.size(), ") for designation: "), designation ); |
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| 524 | } else if ( desigAlts.size() == 0 ) { |
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| 525 | throw SemanticError( "No reasonable alternatives for designation: ", designation ); |
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| 526 | } |
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| 527 | DesignatorChain & d = desigAlts.back(); |
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| 528 | PRINT( for ( Expression * expr : d ) { |
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| 529 | std::cerr << "____desig: " << expr << std::endl; |
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| 530 | } ) // for |
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| 531 | assertf( ! curTypes.empty(), "empty designator chosen"); |
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| 532 | |
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| 533 | // set new designators |
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| 534 | assertf( ! objStack.empty(), "empty object stack when setting designation" ); |
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| 535 | Designation * actualDesignation = new Designation( d ); |
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| 536 | objStack.top()->setPosition( d ); // destroys d |
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| 537 | return actualDesignation; |
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| 538 | } |
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| 539 | |
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| 540 | void CurrentObject::increment() { |
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| 541 | PRINT( std::cerr << "____increment" << std::endl; ) |
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| 542 | if ( ! objStack.empty() ) { |
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| 543 | PRINT( std::cerr << *objStack.top() << std::endl; ) |
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| 544 | objStack.top()->smallStep(); |
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| 545 | } |
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| 546 | } |
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| 547 | |
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| 548 | void CurrentObject::enterListInit() { |
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| 549 | PRINT( std::cerr << "____entering list init" << std::endl; ) |
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| 550 | assertf( ! objStack.empty(), "empty obj stack entering list init" ); |
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| 551 | Type * type = objStack.top()->getNext(); |
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| 552 | if ( type ) { |
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| 553 | objStack.push( createMemberIterator( type ) ); |
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| 554 | } else { |
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| 555 | assertf( false, "not sure about this case..." ); |
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| 556 | } |
---|
| 557 | } |
---|
| 558 | |
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| 559 | void CurrentObject::exitListInit() { |
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| 560 | PRINT( std::cerr << "____exiting list init" << std::endl; ) |
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| 561 | assertf( ! objStack.empty(), "objstack empty" ); |
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| 562 | delete objStack.top(); |
---|
| 563 | objStack.pop(); |
---|
| 564 | if ( ! objStack.empty() ) { |
---|
| 565 | PRINT( std::cerr << *objStack.top() << std::endl; ) |
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| 566 | objStack.top()->bigStep(); |
---|
| 567 | } |
---|
| 568 | } |
---|
| 569 | |
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| 570 | std::list< InitAlternative > CurrentObject::getOptions() { |
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| 571 | PRINT( std::cerr << "____getting current options" << std::endl; ) |
---|
| 572 | assertf( ! objStack.empty(), "objstack empty in getOptions" ); |
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| 573 | return **objStack.top(); |
---|
| 574 | } |
---|
[62423350] | 575 | |
---|
| 576 | Type * CurrentObject::getCurrentType() { |
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| 577 | PRINT( std::cerr << "____getting current type" << std::endl; ) |
---|
| 578 | assertf( ! objStack.empty(), "objstack empty in getCurrentType" ); |
---|
| 579 | return objStack.top()->getNext(); |
---|
| 580 | } |
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[e4d829b] | 581 | } // namespace ResolvExpr |
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| 582 | |
---|
| 583 | // Local Variables: // |
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| 584 | // tab-width: 4 // |
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| 585 | // mode: c++ // |
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| 586 | // compile-command: "make install" // |
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| 587 | // End: // |
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