[79f7875] | 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 | // Expr.hpp -- |
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| 8 | // |
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| 9 | // Author : Aaron B. Moss |
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| 10 | // Created On : Fri May 10 10:30:00 2019 |
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[312029a] | 11 | // Last Modified By : Peter A. Buhr |
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[79f7875] | 12 | // Created On : Fri May 10 10:30:00 2019 |
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[312029a] | 13 | // Update Count : 7 |
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[79f7875] | 14 | // |
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| 15 | |
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| 16 | #pragma once |
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| 17 | |
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| 18 | #include <cassert> |
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[60aaa51d] | 19 | #include <deque> |
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[79f7875] | 20 | #include <map> |
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[54e41b3] | 21 | #include <string> |
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[79f7875] | 22 | #include <utility> // for move |
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| 23 | #include <vector> |
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[c36298d] | 24 | #include <optional> |
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[79f7875] | 25 | |
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| 26 | #include "Fwd.hpp" // for UniqueId |
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[54e41b3] | 27 | #include "Label.hpp" |
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[312029a] | 28 | #include "Decl.hpp" |
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[79f7875] | 29 | #include "ParseNode.hpp" |
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[264e691] | 30 | #include "Visitor.hpp" |
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[79f7875] | 31 | |
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[f3cc5b6] | 32 | // Must be included in *all* AST classes; should be #undef'd at the end of the file |
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[99da267] | 33 | #define MUTATE_FRIEND \ |
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| 34 | template<typename node_t> friend node_t * mutate(const node_t * node); \ |
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| 35 | template<typename node_t> friend node_t * shallowCopy(const node_t * node); |
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| 36 | |
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[f3cc5b6] | 37 | |
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[20de6fb] | 38 | class ConverterOldToNew; |
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[c36298d] | 39 | class ConverterNewToOld; |
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[20de6fb] | 40 | |
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[79f7875] | 41 | namespace ast { |
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| 42 | |
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[6d51bd7] | 43 | /// Contains the ID of a declaration and a type that is derived from that declaration, |
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[79f7875] | 44 | /// but subject to decay-to-pointer and type parameter renaming |
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| 45 | struct ParamEntry { |
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| 46 | UniqueId decl; |
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[07d867b] | 47 | readonly<Decl> declptr; |
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[79f7875] | 48 | ptr<Type> actualType; |
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| 49 | ptr<Type> formalType; |
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| 50 | ptr<Expr> expr; |
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| 51 | |
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[aaeacf4] | 52 | ParamEntry() : decl( 0 ), declptr( nullptr ), actualType( nullptr ), formalType( nullptr ), expr( nullptr ) {} |
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[7870799] | 53 | ParamEntry( |
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| 54 | UniqueId id, const Decl * declptr, const Type * actual, const Type * formal, |
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[b69233a] | 55 | const Expr * e ) |
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[aaeacf4] | 56 | : decl( id ), declptr( declptr ), actualType( actual ), formalType( formal ), expr( e ) {} |
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[46da46b] | 57 | |
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| 58 | operator bool() {return declptr;} |
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[79f7875] | 59 | }; |
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| 60 | |
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| 61 | /// Pre-resolution list of parameters to infer |
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| 62 | using ResnSlots = std::vector<UniqueId>; |
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| 63 | /// Post-resolution map of inferred parameters |
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| 64 | using InferredParams = std::map< UniqueId, ParamEntry >; |
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| 65 | |
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| 66 | /// Base node for expressions |
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| 67 | class Expr : public ParseNode { |
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| 68 | public: |
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[07d867b] | 69 | /* |
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| 70 | * NOTE: the union approach is incorrect until the case of |
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| 71 | * partial resolution in InferMatcher is eliminated. |
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| 72 | * it is reverted to allow unresolved and resolved parameters |
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| 73 | * to coexist in an expression node. |
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| 74 | */ |
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[79f7875] | 75 | struct InferUnion { |
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[07d867b] | 76 | // mode is now unused |
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[79f7875] | 77 | enum { Empty, Slots, Params } mode; |
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[07d867b] | 78 | struct data_t { |
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| 79 | // char def; |
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| 80 | ResnSlots * resnSlots; |
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| 81 | InferredParams * inferParams; |
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| 82 | |
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| 83 | data_t(): resnSlots(nullptr), inferParams(nullptr) {} |
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| 84 | data_t(const data_t &other) = delete; |
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| 85 | ~data_t() { |
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| 86 | delete resnSlots; |
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| 87 | delete inferParams; |
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| 88 | } |
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[79f7875] | 89 | } data; |
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| 90 | |
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| 91 | /// initializes from other InferUnion |
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| 92 | void init_from( const InferUnion& o ) { |
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[07d867b] | 93 | if (o.data.resnSlots) { |
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| 94 | data.resnSlots = new ResnSlots(*o.data.resnSlots); |
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| 95 | } |
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| 96 | if (o.data.inferParams) { |
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| 97 | data.inferParams = new InferredParams(*o.data.inferParams); |
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[79f7875] | 98 | } |
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| 99 | } |
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| 100 | |
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| 101 | /// initializes from other InferUnion (move semantics) |
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| 102 | void init_from( InferUnion&& o ) { |
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[07d867b] | 103 | data.resnSlots = o.data.resnSlots; |
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| 104 | data.inferParams = o.data.inferParams; |
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| 105 | o.data.resnSlots = nullptr; |
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| 106 | o.data.inferParams = nullptr; |
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[79f7875] | 107 | } |
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| 108 | |
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| 109 | InferUnion() : mode(Empty), data() {} |
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| 110 | InferUnion( const InferUnion& o ) : mode( o.mode ), data() { init_from( o ); } |
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| 111 | InferUnion( InferUnion&& o ) : mode( o.mode ), data() { init_from( std::move(o) ); } |
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| 112 | InferUnion& operator= ( const InferUnion& ) = delete; |
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| 113 | InferUnion& operator= ( InferUnion&& ) = delete; |
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[07d867b] | 114 | |
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| 115 | bool hasSlots() const { return data.resnSlots; } |
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[b3a0df6] | 116 | bool hasParams() const { return data.inferParams; } |
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[79f7875] | 117 | |
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| 118 | ResnSlots& resnSlots() { |
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[07d867b] | 119 | if (!data.resnSlots) { |
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| 120 | data.resnSlots = new ResnSlots(); |
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[79f7875] | 121 | } |
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[07d867b] | 122 | return *data.resnSlots; |
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[19e567dd] | 123 | } |
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| 124 | |
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[60aaa51d] | 125 | const ResnSlots& resnSlots() const { |
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[07d867b] | 126 | if (data.resnSlots) { |
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| 127 | return *data.resnSlots; |
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[19e567dd] | 128 | } |
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[7870799] | 129 | assertf(false, "Mode was not already resnSlots"); |
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| 130 | abort(); |
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[79f7875] | 131 | } |
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| 132 | |
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| 133 | InferredParams& inferParams() { |
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[07d867b] | 134 | if (!data.inferParams) { |
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| 135 | data.inferParams = new InferredParams(); |
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[79f7875] | 136 | } |
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[07d867b] | 137 | return *data.inferParams; |
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[19e567dd] | 138 | } |
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| 139 | |
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[60aaa51d] | 140 | const InferredParams& inferParams() const { |
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[07d867b] | 141 | if (data.inferParams) { |
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| 142 | return *data.inferParams; |
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[19e567dd] | 143 | } |
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[7870799] | 144 | assertf(false, "Mode was not already Params"); |
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| 145 | abort(); |
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[79f7875] | 146 | } |
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[60aaa51d] | 147 | |
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[07d867b] | 148 | void set_inferParams( InferredParams * ps ) { |
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| 149 | delete data.resnSlots; |
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| 150 | data.resnSlots = nullptr; |
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| 151 | delete data.inferParams; |
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| 152 | data.inferParams = ps; |
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[b69233a] | 153 | } |
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| 154 | |
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[aaeacf4] | 155 | /// splices other InferUnion into this one. Will fail if one union is in `Slots` mode |
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[60aaa51d] | 156 | /// and the other is in `Params`. |
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| 157 | void splice( InferUnion && o ) { |
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[07d867b] | 158 | if (o.data.resnSlots) { |
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| 159 | if (data.resnSlots) { |
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| 160 | data.resnSlots->insert( |
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| 161 | data.resnSlots->end(), o.data.resnSlots->begin(), o.data.resnSlots->end() ); |
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| 162 | delete o.data.resnSlots; |
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| 163 | } |
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| 164 | else { |
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| 165 | data.resnSlots = o.data.resnSlots; |
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[60aaa51d] | 166 | } |
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[07d867b] | 167 | o.data.resnSlots = nullptr; |
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| 168 | } |
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| 169 | |
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| 170 | if (o.data.inferParams) { |
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| 171 | if (data.inferParams) { |
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| 172 | for ( const auto & p : *o.data.inferParams ) { |
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| 173 | (*data.inferParams)[p.first] = std::move(p.second); |
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| 174 | } |
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| 175 | delete o.data.inferParams; |
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| 176 | } |
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| 177 | else { |
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| 178 | data.inferParams = o.data.inferParams; |
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| 179 | } |
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| 180 | o.data.inferParams = nullptr; |
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| 181 | } |
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[60aaa51d] | 182 | } |
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[79f7875] | 183 | }; |
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| 184 | |
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| 185 | ptr<Type> result; |
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| 186 | ptr<TypeSubstitution> env; |
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| 187 | InferUnion inferred; |
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| 188 | bool extension = false; |
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| 189 | |
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[54e41b3] | 190 | Expr( const CodeLocation & loc, const Type * res = nullptr ) |
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| 191 | : ParseNode( loc ), result( res ), env(), inferred() {} |
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[79f7875] | 192 | |
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[9e1d485] | 193 | Expr * set_extension( bool ex ) { extension = ex; return this; } |
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[cf32116] | 194 | virtual bool get_lvalue() const; |
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[79f7875] | 195 | |
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[69bafd2] | 196 | virtual const Expr * accept( Visitor & v ) const override = 0; |
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[79f7875] | 197 | private: |
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[23f99e1] | 198 | Expr * clone() const override = 0; |
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[f3cc5b6] | 199 | MUTATE_FRIEND |
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[264e691] | 200 | }; |
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| 201 | |
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[87701b6] | 202 | /// The application of a function to a set of parameters. |
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[54e41b3] | 203 | /// Post-resolver form of `UntypedExpr` |
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| 204 | class ApplicationExpr final : public Expr { |
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| 205 | public: |
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| 206 | ptr<Expr> func; |
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| 207 | std::vector<ptr<Expr>> args; |
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| 208 | |
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| 209 | ApplicationExpr( const CodeLocation & loc, const Expr * f, std::vector<ptr<Expr>> && as = {} ); |
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| 210 | |
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[cf32116] | 211 | bool get_lvalue() const final; |
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| 212 | |
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[54e41b3] | 213 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 214 | private: |
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| 215 | ApplicationExpr * clone() const override { return new ApplicationExpr{ *this }; } |
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[f3cc5b6] | 216 | MUTATE_FRIEND |
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[54e41b3] | 217 | }; |
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| 218 | |
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| 219 | /// The application of a function to a set of parameters, pre-overload resolution. |
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| 220 | class UntypedExpr final : public Expr { |
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| 221 | public: |
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| 222 | ptr<Expr> func; |
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| 223 | std::vector<ptr<Expr>> args; |
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| 224 | |
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| 225 | UntypedExpr( const CodeLocation & loc, const Expr * f, std::vector<ptr<Expr>> && as = {} ) |
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| 226 | : Expr( loc ), func( f ), args( std::move(as) ) {} |
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| 227 | |
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[cf32116] | 228 | bool get_lvalue() const final; |
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| 229 | |
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[54e41b3] | 230 | /// Creates a new dereference expression |
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[490fb92e] | 231 | static UntypedExpr * createDeref( const CodeLocation & loc, const Expr * arg ); |
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[54e41b3] | 232 | /// Creates a new assignment expression |
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[490fb92e] | 233 | static UntypedExpr * createAssign( const CodeLocation & loc, const Expr * lhs, const Expr * rhs ); |
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[e6cf857f] | 234 | /// Creates a new call of a variable. |
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| 235 | static UntypedExpr * createCall( const CodeLocation & loc, |
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| 236 | const std::string & name, std::vector<ptr<Expr>> && args ); |
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[54e41b3] | 237 | |
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| 238 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 239 | private: |
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| 240 | UntypedExpr * clone() const override { return new UntypedExpr{ *this }; } |
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[f3cc5b6] | 241 | MUTATE_FRIEND |
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[54e41b3] | 242 | }; |
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| 243 | |
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| 244 | /// A name whose name is as-yet undetermined. |
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| 245 | /// May also be used to avoid name mangling in codegen phase. |
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| 246 | class NameExpr final : public Expr { |
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| 247 | public: |
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| 248 | std::string name; |
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| 249 | |
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| 250 | NameExpr( const CodeLocation & loc, const std::string & n ) : Expr( loc ), name( n ) {} |
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| 251 | |
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| 252 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 253 | private: |
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| 254 | NameExpr * clone() const override { return new NameExpr{ *this }; } |
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[f3cc5b6] | 255 | MUTATE_FRIEND |
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[54e41b3] | 256 | }; |
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| 257 | |
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[b0d9ff7] | 258 | class QualifiedNameExpr final : public Expr { |
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| 259 | public: |
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| 260 | ptr<Decl> type_decl; |
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| 261 | std::string name; |
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| 262 | |
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[5408b59] | 263 | QualifiedNameExpr( const CodeLocation & loc, const Decl * d, const std::string & n ) |
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| 264 | : Expr( loc ), type_decl( d ), name( n ) {} |
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[b0d9ff7] | 265 | |
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| 266 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 267 | private: |
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| 268 | QualifiedNameExpr * clone() const override { return new QualifiedNameExpr{ *this }; } |
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| 269 | MUTATE_FRIEND |
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| 270 | }; |
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| 271 | |
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[d5631b3] | 272 | /// A reference to a named variable. |
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| 273 | class VariableExpr final : public Expr { |
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| 274 | public: |
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| 275 | readonly<DeclWithType> var; |
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| 276 | |
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| 277 | VariableExpr( const CodeLocation & loc ); |
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| 278 | VariableExpr( const CodeLocation & loc, const DeclWithType * v ); |
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| 279 | |
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| 280 | bool get_lvalue() const final; |
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| 281 | |
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| 282 | /// generates a function pointer for a given function |
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| 283 | static VariableExpr * functionPointer( const CodeLocation & loc, const FunctionDecl * decl ); |
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| 284 | |
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| 285 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 286 | private: |
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| 287 | VariableExpr * clone() const override { return new VariableExpr{ *this }; } |
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| 288 | MUTATE_FRIEND |
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| 289 | }; |
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| 290 | |
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[54e41b3] | 291 | /// Address-of expression `&e` |
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| 292 | class AddressExpr final : public Expr { |
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| 293 | public: |
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| 294 | ptr<Expr> arg; |
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| 295 | |
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| 296 | AddressExpr( const CodeLocation & loc, const Expr * a ); |
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| 297 | |
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[b8524ca] | 298 | /// Generate AddressExpr wrapping given expression at same location |
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| 299 | AddressExpr( const Expr * a ) : AddressExpr( a->location, a ) {} |
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| 300 | |
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[54e41b3] | 301 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 302 | private: |
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| 303 | AddressExpr * clone() const override { return new AddressExpr{ *this }; } |
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[f3cc5b6] | 304 | MUTATE_FRIEND |
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[54e41b3] | 305 | }; |
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| 306 | |
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| 307 | /// GCC &&label |
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| 308 | /// https://gcc.gnu.org/onlinedocs/gcc-3.4.2/gcc/Labels-as-Values.html |
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| 309 | class LabelAddressExpr final : public Expr { |
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| 310 | public: |
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| 311 | Label arg; |
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| 312 | |
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| 313 | LabelAddressExpr( const CodeLocation & loc, Label && a ); |
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| 314 | |
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| 315 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 316 | private: |
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| 317 | LabelAddressExpr * clone() const override { return new LabelAddressExpr{ *this }; } |
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[f3cc5b6] | 318 | MUTATE_FRIEND |
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[54e41b3] | 319 | }; |
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| 320 | |
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[bb87dd0] | 321 | /// Inidicates whether the cast is introduced by the CFA type system. |
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| 322 | /// GeneratedCast for casts that the resolver introduces to force a return type |
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| 323 | /// ExplicitCast for casts from user code |
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| 324 | /// ExplicitCast for casts from desugaring advanced CFA features into simpler CFA |
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| 325 | /// example |
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| 326 | /// int * p; // declaration |
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| 327 | /// (float *) p; // use, with subject cast |
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| 328 | /// subject cast being GeneratedCast means we are considering an interpretation with a type mismatch |
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| 329 | /// subject cast being ExplicitCast means someone in charge wants it that way |
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[54e41b3] | 330 | enum GeneratedFlag { ExplicitCast, GeneratedCast }; |
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| 331 | |
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| 332 | /// A type cast, e.g. `(int)e` |
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| 333 | class CastExpr final : public Expr { |
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| 334 | public: |
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| 335 | ptr<Expr> arg; |
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| 336 | GeneratedFlag isGenerated; |
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| 337 | |
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[46da46b] | 338 | enum CastKind { |
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| 339 | Default, // C |
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| 340 | Coerce, // reinterpret cast |
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| 341 | Return // overload selection |
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| 342 | }; |
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| 343 | |
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| 344 | CastKind kind = Default; |
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| 345 | |
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[87701b6] | 346 | CastExpr( const CodeLocation & loc, const Expr * a, const Type * to, |
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[46da46b] | 347 | GeneratedFlag g = GeneratedCast, CastKind kind = Default ) : Expr( loc, to ), arg( a ), isGenerated( g ), kind( kind ) {} |
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[54e41b3] | 348 | /// Cast-to-void |
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[46da46b] | 349 | CastExpr( const CodeLocation & loc, const Expr * a, GeneratedFlag g = GeneratedCast, CastKind kind = Default ); |
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[54e41b3] | 350 | |
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[b8524ca] | 351 | /// Wrap a cast expression around an existing expression (always generated) |
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| 352 | CastExpr( const Expr * a, const Type * to ) : CastExpr( a->location, a, to, GeneratedCast ) {} |
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| 353 | |
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| 354 | /// Wrap a cast-to-void expression around an existing expression (always generated) |
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| 355 | CastExpr( const Expr * a ) : CastExpr( a->location, a, GeneratedCast ) {} |
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| 356 | |
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[cf32116] | 357 | bool get_lvalue() const final; |
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| 358 | |
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[54e41b3] | 359 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 360 | private: |
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| 361 | CastExpr * clone() const override { return new CastExpr{ *this }; } |
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[f3cc5b6] | 362 | MUTATE_FRIEND |
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[54e41b3] | 363 | }; |
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| 364 | |
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| 365 | /// A cast to "keyword types", e.g. `(thread &)t` |
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| 366 | class KeywordCastExpr final : public Expr { |
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| 367 | public: |
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| 368 | ptr<Expr> arg; |
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[4ef08f7] | 369 | struct Concrete { |
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| 370 | std::string field; |
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| 371 | std::string getter; |
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| 372 | |
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| 373 | Concrete() = default; |
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| 374 | Concrete(const Concrete &) = default; |
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| 375 | }; |
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[312029a] | 376 | ast::AggregateDecl::Aggregate target; |
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[4ef08f7] | 377 | Concrete concrete_target; |
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| 378 | |
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[54e41b3] | 379 | |
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[312029a] | 380 | KeywordCastExpr( const CodeLocation & loc, const Expr * a, ast::AggregateDecl::Aggregate t ) |
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[54e41b3] | 381 | : Expr( loc ), arg( a ), target( t ) {} |
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| 382 | |
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[4ef08f7] | 383 | KeywordCastExpr( const CodeLocation & loc, const Expr * a, ast::AggregateDecl::Aggregate t, const Concrete & ct ) |
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| 384 | : Expr( loc ), arg( a ), target( t ), concrete_target( ct ) {} |
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| 385 | |
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[54e41b3] | 386 | /// Get a name for the target type |
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[312029a] | 387 | const char * targetString() const; |
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[54e41b3] | 388 | |
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| 389 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 390 | private: |
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| 391 | KeywordCastExpr * clone() const override { return new KeywordCastExpr{ *this }; } |
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[f3cc5b6] | 392 | MUTATE_FRIEND |
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[54e41b3] | 393 | }; |
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| 394 | |
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| 395 | /// A virtual dynamic cast, e.g. `(virtual exception)e` |
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| 396 | class VirtualCastExpr final : public Expr { |
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| 397 | public: |
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| 398 | ptr<Expr> arg; |
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| 399 | |
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| 400 | VirtualCastExpr( const CodeLocation & loc, const Expr * a, const Type * to ) |
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| 401 | : Expr( loc, to ), arg( a ) {} |
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| 402 | |
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| 403 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 404 | private: |
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| 405 | VirtualCastExpr * clone() const override { return new VirtualCastExpr{ *this }; } |
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[f3cc5b6] | 406 | MUTATE_FRIEND |
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[54e41b3] | 407 | }; |
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| 408 | |
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| 409 | /// A member selection operation before expression resolution, e.g. `q.p` |
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| 410 | class UntypedMemberExpr final : public Expr { |
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| 411 | public: |
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| 412 | ptr<Expr> member; |
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| 413 | ptr<Expr> aggregate; |
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| 414 | |
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| 415 | UntypedMemberExpr( const CodeLocation & loc, const Expr * mem, const Expr * agg ) |
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| 416 | : Expr( loc ), member( mem ), aggregate( agg ) { assert( aggregate ); } |
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| 417 | |
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[cf32116] | 418 | bool get_lvalue() const final; |
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| 419 | |
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[54e41b3] | 420 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 421 | private: |
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| 422 | UntypedMemberExpr * clone() const override { return new UntypedMemberExpr{ *this }; } |
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[f3cc5b6] | 423 | MUTATE_FRIEND |
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[54e41b3] | 424 | }; |
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| 425 | |
---|
| 426 | /// A member selection operation after expression resolution, e.g. `q.p` |
---|
| 427 | class MemberExpr final : public Expr { |
---|
| 428 | public: |
---|
| 429 | readonly<DeclWithType> member; |
---|
| 430 | ptr<Expr> aggregate; |
---|
| 431 | |
---|
| 432 | MemberExpr( const CodeLocation & loc, const DeclWithType * mem, const Expr * agg ); |
---|
| 433 | |
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[cf32116] | 434 | bool get_lvalue() const final; |
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| 435 | |
---|
[54e41b3] | 436 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 437 | private: |
---|
| 438 | MemberExpr * clone() const override { return new MemberExpr{ *this }; } |
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[f3cc5b6] | 439 | MUTATE_FRIEND |
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[ae265b55] | 440 | |
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| 441 | // Custructor overload meant only for AST conversion |
---|
| 442 | enum NoOpConstruction { NoOpConstructionChosen }; |
---|
| 443 | MemberExpr( const CodeLocation & loc, const DeclWithType * mem, const Expr * agg, |
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| 444 | NoOpConstruction overloadSelector ); |
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| 445 | friend class ::ConverterOldToNew; |
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| 446 | friend class ::ConverterNewToOld; |
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[54e41b3] | 447 | }; |
---|
| 448 | |
---|
[c36298d] | 449 | /// A compile-time constant. |
---|
| 450 | /// Mostly carries C-source text from parse to code-gen, without interpretation. E.g. strings keep their outer quotes and never have backslashes interpreted. |
---|
| 451 | /// Integer constants get special treatment, e.g. for verifying array operations, when an integer constant occurs as the length of an array. |
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[54e41b3] | 452 | class ConstantExpr final : public Expr { |
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| 453 | public: |
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[c36298d] | 454 | // Representation of this constant, as it occurs in .cfa source and .cfa.cc result. |
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[54e41b3] | 455 | std::string rep; |
---|
| 456 | |
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[87701b6] | 457 | ConstantExpr( |
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[7870799] | 458 | const CodeLocation & loc, const Type * ty, const std::string & r, |
---|
[c36298d] | 459 | std::optional<unsigned long long> i ) |
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[490fb92e] | 460 | : Expr( loc, ty ), rep( r ), ival( i ), underlyer(ty) {} |
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[87701b6] | 461 | |
---|
[c36298d] | 462 | /// Gets the integer value of this constant, if one is appropriate to its type. |
---|
| 463 | /// Throws a SemanticError if the type is not appropriate for value-as-integer. |
---|
| 464 | /// Suffers an assertion failure the type is appropriate but no integer value was supplied to the constructor. |
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[54e41b3] | 465 | long long int intValue() const; |
---|
| 466 | |
---|
[b91bfde] | 467 | /// Generates a boolean constant of the given bool. |
---|
[54e41b3] | 468 | static ConstantExpr * from_bool( const CodeLocation & loc, bool b ); |
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[b91bfde] | 469 | /// Generates an integer constant of the given int. |
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[54e41b3] | 470 | static ConstantExpr * from_int( const CodeLocation & loc, int i ); |
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[b91bfde] | 471 | /// Generates an integer constant of the given unsigned long int. |
---|
[54e41b3] | 472 | static ConstantExpr * from_ulong( const CodeLocation & loc, unsigned long i ); |
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[b91bfde] | 473 | /// Generates a string constant from the given string (char type, unquoted string). |
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| 474 | static ConstantExpr * from_string( const CodeLocation & loc, const std::string & string ); |
---|
| 475 | /// Generates a null pointer value for the given type. void * if omitted. |
---|
[54e41b3] | 476 | static ConstantExpr * null( const CodeLocation & loc, const Type * ptrType = nullptr ); |
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| 477 | |
---|
| 478 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 479 | private: |
---|
| 480 | ConstantExpr * clone() const override { return new ConstantExpr{ *this }; } |
---|
[f3cc5b6] | 481 | MUTATE_FRIEND |
---|
[c36298d] | 482 | |
---|
| 483 | std::optional<unsigned long long> ival; |
---|
| 484 | |
---|
| 485 | // Intended only for legacy support of roundtripping the old AST. |
---|
| 486 | // Captures the very-locally inferred type, before the resolver modifies the type of this ConstantExpression. |
---|
| 487 | // In the old AST it's constExpr->constant.type |
---|
| 488 | ptr<Type> underlyer; |
---|
| 489 | friend class ::ConverterOldToNew; |
---|
| 490 | friend class ::ConverterNewToOld; |
---|
[54e41b3] | 491 | }; |
---|
| 492 | |
---|
| 493 | /// sizeof expression, e.g. `sizeof(int)`, `sizeof 3+4` |
---|
| 494 | class SizeofExpr final : public Expr { |
---|
| 495 | public: |
---|
| 496 | ptr<Expr> expr; |
---|
| 497 | ptr<Type> type; |
---|
| 498 | |
---|
| 499 | SizeofExpr( const CodeLocation & loc, const Expr * e ); |
---|
| 500 | SizeofExpr( const CodeLocation & loc, const Type * t ); |
---|
| 501 | // deliberately no disambiguating overload for nullptr_t |
---|
| 502 | |
---|
| 503 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 504 | private: |
---|
| 505 | SizeofExpr * clone() const override { return new SizeofExpr{ *this }; } |
---|
[f3cc5b6] | 506 | MUTATE_FRIEND |
---|
[54e41b3] | 507 | }; |
---|
| 508 | |
---|
| 509 | /// alignof expression, e.g. `alignof(int)`, `alignof 3+4` |
---|
| 510 | class AlignofExpr final : public Expr { |
---|
| 511 | public: |
---|
| 512 | ptr<Expr> expr; |
---|
| 513 | ptr<Type> type; |
---|
| 514 | |
---|
| 515 | AlignofExpr( const CodeLocation & loc, const Expr * e ); |
---|
| 516 | AlignofExpr( const CodeLocation & loc, const Type * t ); |
---|
| 517 | // deliberately no disambiguating overload for nullptr_t |
---|
| 518 | |
---|
| 519 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 520 | private: |
---|
| 521 | AlignofExpr * clone() const override { return new AlignofExpr{ *this }; } |
---|
[f3cc5b6] | 522 | MUTATE_FRIEND |
---|
[54e41b3] | 523 | }; |
---|
| 524 | |
---|
| 525 | /// offsetof expression before resolver determines field, e.g. `offsetof(MyStruct, myfield)` |
---|
| 526 | class UntypedOffsetofExpr final : public Expr { |
---|
| 527 | public: |
---|
| 528 | ptr<Type> type; |
---|
| 529 | std::string member; |
---|
| 530 | |
---|
| 531 | UntypedOffsetofExpr( const CodeLocation & loc, const Type * ty, const std::string & mem ) |
---|
| 532 | : Expr( loc ), type( ty ), member( mem ) {} |
---|
| 533 | |
---|
| 534 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 535 | private: |
---|
| 536 | UntypedOffsetofExpr * clone() const override { return new UntypedOffsetofExpr{ *this }; } |
---|
[f3cc5b6] | 537 | MUTATE_FRIEND |
---|
[54e41b3] | 538 | }; |
---|
| 539 | |
---|
| 540 | /// offsetof expression after resolver determines field, e.g. `offsetof(MyStruct, myfield)` |
---|
| 541 | class OffsetofExpr final : public Expr { |
---|
| 542 | public: |
---|
| 543 | ptr<Type> type; |
---|
| 544 | readonly<DeclWithType> member; |
---|
| 545 | |
---|
| 546 | OffsetofExpr( const CodeLocation & loc, const Type * ty, const DeclWithType * mem ); |
---|
| 547 | |
---|
| 548 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 549 | private: |
---|
| 550 | OffsetofExpr * clone() const override { return new OffsetofExpr{ *this }; } |
---|
[f3cc5b6] | 551 | MUTATE_FRIEND |
---|
[54e41b3] | 552 | }; |
---|
| 553 | |
---|
| 554 | /// a pack of field-offsets for a generic type |
---|
| 555 | class OffsetPackExpr final : public Expr { |
---|
| 556 | public: |
---|
| 557 | ptr<StructInstType> type; |
---|
| 558 | |
---|
| 559 | OffsetPackExpr( const CodeLocation & loc, const StructInstType * ty ); |
---|
| 560 | |
---|
| 561 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 562 | private: |
---|
| 563 | OffsetPackExpr * clone() const override { return new OffsetPackExpr{ *this }; } |
---|
[f3cc5b6] | 564 | MUTATE_FRIEND |
---|
[54e41b3] | 565 | }; |
---|
| 566 | |
---|
| 567 | /// Variants of short-circuiting logical expression |
---|
| 568 | enum LogicalFlag { OrExpr, AndExpr }; |
---|
| 569 | |
---|
| 570 | /// Short-circuiting boolean expression (`&&` or `||`) |
---|
| 571 | class LogicalExpr final : public Expr { |
---|
| 572 | public: |
---|
| 573 | ptr<Expr> arg1; |
---|
| 574 | ptr<Expr> arg2; |
---|
| 575 | LogicalFlag isAnd; |
---|
| 576 | |
---|
| 577 | LogicalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, LogicalFlag ia ); |
---|
| 578 | |
---|
| 579 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 580 | private: |
---|
| 581 | LogicalExpr * clone() const override { return new LogicalExpr{ *this }; } |
---|
[f3cc5b6] | 582 | MUTATE_FRIEND |
---|
[54e41b3] | 583 | }; |
---|
| 584 | |
---|
| 585 | /// Three-argument conditional e.g. `p ? a : b` |
---|
| 586 | class ConditionalExpr final : public Expr { |
---|
| 587 | public: |
---|
| 588 | ptr<Expr> arg1; |
---|
| 589 | ptr<Expr> arg2; |
---|
| 590 | ptr<Expr> arg3; |
---|
| 591 | |
---|
| 592 | ConditionalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, const Expr * a3 ) |
---|
| 593 | : Expr( loc ), arg1( a1 ), arg2( a2 ), arg3( a3 ) {} |
---|
| 594 | |
---|
| 595 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 596 | private: |
---|
| 597 | ConditionalExpr * clone() const override { return new ConditionalExpr{ *this }; } |
---|
[f3cc5b6] | 598 | MUTATE_FRIEND |
---|
[54e41b3] | 599 | }; |
---|
| 600 | |
---|
| 601 | /// Comma expression e.g. `( a , b )` |
---|
| 602 | class CommaExpr final : public Expr { |
---|
| 603 | public: |
---|
| 604 | ptr<Expr> arg1; |
---|
| 605 | ptr<Expr> arg2; |
---|
| 606 | |
---|
[87701b6] | 607 | CommaExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2 ) |
---|
[4e13e2a] | 608 | : Expr( loc ), arg1( a1 ), arg2( a2 ) { |
---|
| 609 | this->result = a2->result; |
---|
| 610 | } |
---|
[54e41b3] | 611 | |
---|
[cf32116] | 612 | bool get_lvalue() const final; |
---|
| 613 | |
---|
[54e41b3] | 614 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 615 | private: |
---|
| 616 | CommaExpr * clone() const override { return new CommaExpr{ *this }; } |
---|
[f3cc5b6] | 617 | MUTATE_FRIEND |
---|
[54e41b3] | 618 | }; |
---|
| 619 | |
---|
[264e691] | 620 | /// A type used as an expression (e.g. a type generator parameter) |
---|
| 621 | class TypeExpr final : public Expr { |
---|
| 622 | public: |
---|
| 623 | ptr<Type> type; |
---|
| 624 | |
---|
| 625 | TypeExpr( const CodeLocation & loc, const Type * t ) : Expr(loc), type(t) {} |
---|
| 626 | |
---|
[69bafd2] | 627 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
[264e691] | 628 | private: |
---|
| 629 | TypeExpr * clone() const override { return new TypeExpr{ *this }; } |
---|
[f3cc5b6] | 630 | MUTATE_FRIEND |
---|
[79f7875] | 631 | }; |
---|
| 632 | |
---|
[4ec9513] | 633 | class DimensionExpr final : public Expr { |
---|
| 634 | public: |
---|
| 635 | std::string name; |
---|
| 636 | |
---|
| 637 | DimensionExpr( const CodeLocation & loc, std::string name ) |
---|
| 638 | : Expr( loc ), name( name ) {} |
---|
| 639 | |
---|
| 640 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 641 | private: |
---|
| 642 | DimensionExpr * clone() const override { return new DimensionExpr{ *this }; } |
---|
| 643 | MUTATE_FRIEND |
---|
| 644 | }; |
---|
| 645 | |
---|
[54e41b3] | 646 | /// A GCC "asm constraint operand" used in an asm statement, e.g. `[output] "=f" (result)`. |
---|
| 647 | /// https://gcc.gnu.org/onlinedocs/gcc-4.7.1/gcc/Machine-Constraints.html#Machine-Constraints |
---|
| 648 | class AsmExpr final : public Expr { |
---|
| 649 | public: |
---|
[665f432] | 650 | std::string inout; |
---|
[9b4f329] | 651 | ptr<Expr> constraint; |
---|
| 652 | ptr<Expr> operand; |
---|
| 653 | |
---|
[665f432] | 654 | AsmExpr( const CodeLocation & loc, const std::string & io, const Expr * con, const Expr * op ) |
---|
[9b4f329] | 655 | : Expr( loc ), inout( io ), constraint( con ), operand( op ) {} |
---|
| 656 | |
---|
| 657 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 658 | private: |
---|
| 659 | AsmExpr * clone() const override { return new AsmExpr{ *this }; } |
---|
| 660 | MUTATE_FRIEND |
---|
| 661 | }; |
---|
| 662 | |
---|
[17a0228a] | 663 | /// The application of a function to a set of parameters, along with a set of copy constructor |
---|
[9b4f329] | 664 | /// calls, one for each argument |
---|
| 665 | class ImplicitCopyCtorExpr final : public Expr { |
---|
| 666 | public: |
---|
| 667 | ptr<ApplicationExpr> callExpr; |
---|
| 668 | |
---|
| 669 | ImplicitCopyCtorExpr( const CodeLocation& loc, const ApplicationExpr * call ) |
---|
[490fb92e] | 670 | : Expr( loc, call->result ), callExpr(call) { assert( call ); assert(call->result); } |
---|
[9b4f329] | 671 | |
---|
| 672 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 673 | private: |
---|
| 674 | ImplicitCopyCtorExpr * clone() const override { return new ImplicitCopyCtorExpr{ *this }; } |
---|
| 675 | MUTATE_FRIEND |
---|
| 676 | }; |
---|
| 677 | |
---|
| 678 | /// Constructor in expression context, e.g. `int * x = alloc() { 42 };` |
---|
| 679 | class ConstructorExpr final : public Expr { |
---|
| 680 | public: |
---|
| 681 | ptr<Expr> callExpr; |
---|
| 682 | |
---|
| 683 | ConstructorExpr( const CodeLocation & loc, const Expr * call ); |
---|
| 684 | |
---|
| 685 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 686 | private: |
---|
| 687 | ConstructorExpr * clone() const override { return new ConstructorExpr{ *this }; } |
---|
| 688 | MUTATE_FRIEND |
---|
| 689 | }; |
---|
| 690 | |
---|
| 691 | /// A C99 compound literal, e.g. `(MyType){ a, b, c }` |
---|
| 692 | class CompoundLiteralExpr final : public Expr { |
---|
| 693 | public: |
---|
| 694 | ptr<Init> init; |
---|
| 695 | |
---|
| 696 | CompoundLiteralExpr( const CodeLocation & loc, const Type * t, const Init * i ); |
---|
| 697 | |
---|
[cf32116] | 698 | bool get_lvalue() const final; |
---|
| 699 | |
---|
[9b4f329] | 700 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 701 | private: |
---|
| 702 | CompoundLiteralExpr * clone() const override { return new CompoundLiteralExpr{ *this }; } |
---|
| 703 | MUTATE_FRIEND |
---|
| 704 | }; |
---|
| 705 | |
---|
| 706 | /// A range, e.g. `3 ... 5` or `1~10` |
---|
| 707 | class RangeExpr final : public Expr { |
---|
| 708 | public: |
---|
| 709 | ptr<Expr> low; |
---|
| 710 | ptr<Expr> high; |
---|
| 711 | |
---|
| 712 | RangeExpr( const CodeLocation & loc, const Expr * l, const Expr * h ) |
---|
| 713 | : Expr( loc ), low( l ), high( h ) {} |
---|
| 714 | |
---|
| 715 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 716 | private: |
---|
| 717 | RangeExpr * clone() const override { return new RangeExpr{ *this }; } |
---|
| 718 | MUTATE_FRIEND |
---|
| 719 | }; |
---|
| 720 | |
---|
| 721 | /// A tuple expression before resolution, e.g. `[a, b, c]` |
---|
| 722 | class UntypedTupleExpr final : public Expr { |
---|
| 723 | public: |
---|
| 724 | std::vector<ptr<Expr>> exprs; |
---|
| 725 | |
---|
| 726 | UntypedTupleExpr( const CodeLocation & loc, std::vector<ptr<Expr>> && xs ) |
---|
| 727 | : Expr( loc ), exprs( std::move(xs) ) {} |
---|
| 728 | |
---|
| 729 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 730 | private: |
---|
| 731 | UntypedTupleExpr * clone() const override { return new UntypedTupleExpr{ *this }; } |
---|
| 732 | MUTATE_FRIEND |
---|
| 733 | }; |
---|
| 734 | |
---|
| 735 | /// A tuple expression after resolution, e.g. `[a, b, c]` |
---|
| 736 | class TupleExpr final : public Expr { |
---|
| 737 | public: |
---|
| 738 | std::vector<ptr<Expr>> exprs; |
---|
| 739 | |
---|
| 740 | TupleExpr( const CodeLocation & loc, std::vector<ptr<Expr>> && xs ); |
---|
| 741 | |
---|
| 742 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 743 | private: |
---|
| 744 | TupleExpr * clone() const override { return new TupleExpr{ *this }; } |
---|
| 745 | MUTATE_FRIEND |
---|
| 746 | }; |
---|
| 747 | |
---|
| 748 | /// An element selection operation on a tuple value, e.g. `t.3` after analysis |
---|
| 749 | class TupleIndexExpr final : public Expr { |
---|
| 750 | public: |
---|
| 751 | ptr<Expr> tuple; |
---|
| 752 | unsigned index; |
---|
| 753 | |
---|
| 754 | TupleIndexExpr( const CodeLocation & loc, const Expr * t, unsigned i ); |
---|
| 755 | |
---|
[cf32116] | 756 | bool get_lvalue() const final; |
---|
| 757 | |
---|
[9b4f329] | 758 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 759 | private: |
---|
| 760 | TupleIndexExpr * clone() const override { return new TupleIndexExpr{ *this }; } |
---|
| 761 | MUTATE_FRIEND |
---|
| 762 | }; |
---|
| 763 | |
---|
[17a0228a] | 764 | /// A multiple- or mass-assignment operation, or a tuple ctor/dtor expression. |
---|
| 765 | /// multiple-assignment: both sides of the assignment have tuple type, |
---|
[9b4f329] | 766 | /// e.g. `[a, b, c] = [d, e, f];` |
---|
| 767 | /// mass-assignment: left-hand side has tuple type and right-hand side does not: |
---|
| 768 | /// e.g. `[a, b, c] = 42;` |
---|
| 769 | class TupleAssignExpr final : public Expr { |
---|
| 770 | public: |
---|
| 771 | ptr<StmtExpr> stmtExpr; |
---|
| 772 | |
---|
[17a0228a] | 773 | TupleAssignExpr( |
---|
| 774 | const CodeLocation & loc, std::vector<ptr<Expr>> && assigns, |
---|
[9b4f329] | 775 | std::vector<ptr<ObjectDecl>> && tempDecls ); |
---|
[17a0228a] | 776 | |
---|
[9b4f329] | 777 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
[20de6fb] | 778 | |
---|
| 779 | friend class ::ConverterOldToNew; |
---|
| 780 | |
---|
[9b4f329] | 781 | private: |
---|
| 782 | TupleAssignExpr * clone() const override { return new TupleAssignExpr{ *this }; } |
---|
[20de6fb] | 783 | TupleAssignExpr( const CodeLocation & loc, const Type * result, const StmtExpr * s ); |
---|
| 784 | |
---|
[9b4f329] | 785 | MUTATE_FRIEND |
---|
| 786 | }; |
---|
| 787 | |
---|
| 788 | /// A GCC "statement expression", e.g. `({ int x = 5; x })` |
---|
| 789 | class StmtExpr final : public Expr { |
---|
| 790 | public: |
---|
| 791 | ptr<CompoundStmt> stmts; |
---|
| 792 | std::vector<ptr<ObjectDecl>> returnDecls; ///< return variable(s) for statement expression |
---|
| 793 | std::vector<ptr<Expr>> dtors; ///< destructor(s) for return variable(s) |
---|
| 794 | |
---|
[490fb92e] | 795 | readonly<ExprStmt> resultExpr; |
---|
| 796 | |
---|
[9b4f329] | 797 | StmtExpr( const CodeLocation & loc, const CompoundStmt * ss ); |
---|
| 798 | |
---|
| 799 | /// Set the result type of this StmtExpr based on its body |
---|
| 800 | void computeResult(); |
---|
| 801 | |
---|
| 802 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 803 | private: |
---|
| 804 | StmtExpr * clone() const override { return new StmtExpr{ *this }; } |
---|
| 805 | MUTATE_FRIEND |
---|
| 806 | }; |
---|
| 807 | |
---|
| 808 | /// An expression which must only be evaluated once |
---|
[3249dd8b] | 809 | class UniqueExpr final : public Expr { |
---|
[9b4f329] | 810 | static unsigned long long nextId; |
---|
| 811 | public: |
---|
| 812 | ptr<Expr> expr; |
---|
[7edd5c1] | 813 | readonly<ObjectDecl> object; |
---|
[9b4f329] | 814 | ptr<VariableExpr> var; |
---|
| 815 | unsigned long long id; |
---|
| 816 | |
---|
[d76f32c] | 817 | UniqueExpr( const CodeLocation & loc, const Expr * e, unsigned long long i = -1ull ); |
---|
[9b4f329] | 818 | |
---|
| 819 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 820 | private: |
---|
| 821 | UniqueExpr * clone() const override { return new UniqueExpr{ *this }; } |
---|
| 822 | MUTATE_FRIEND |
---|
| 823 | }; |
---|
| 824 | |
---|
| 825 | /// One option for resolving an initializer expression |
---|
| 826 | struct InitAlternative { |
---|
| 827 | ptr<Type> type; |
---|
| 828 | ptr<Designation> designation; |
---|
| 829 | |
---|
| 830 | InitAlternative() = default; |
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| 831 | InitAlternative( const Type * ty, const Designation * des ) : type( ty ), designation( des ) {} |
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| 832 | }; |
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| 833 | |
---|
| 834 | /// Pre-resolution initializer expression |
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| 835 | class UntypedInitExpr final : public Expr { |
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| 836 | public: |
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| 837 | ptr<Expr> expr; |
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[60aaa51d] | 838 | std::deque<InitAlternative> initAlts; |
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[9b4f329] | 839 | |
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[60aaa51d] | 840 | UntypedInitExpr( const CodeLocation & loc, const Expr * e, std::deque<InitAlternative> && as ) |
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[9b4f329] | 841 | : Expr( loc ), expr( e ), initAlts( std::move(as) ) {} |
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| 842 | |
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| 843 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 844 | private: |
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| 845 | UntypedInitExpr * clone() const override { return new UntypedInitExpr{ *this }; } |
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| 846 | MUTATE_FRIEND |
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| 847 | }; |
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| 848 | |
---|
| 849 | /// Post-resolution initializer expression |
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| 850 | class InitExpr final : public Expr { |
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| 851 | public: |
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| 852 | ptr<Expr> expr; |
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| 853 | ptr<Designation> designation; |
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| 854 | |
---|
| 855 | InitExpr( const CodeLocation & loc, const Expr * e, const Designation * des ) |
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| 856 | : Expr( loc, e->result ), expr( e ), designation( des ) {} |
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| 857 | |
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| 858 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 859 | private: |
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| 860 | InitExpr * clone() const override { return new InitExpr{ *this }; } |
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| 861 | MUTATE_FRIEND |
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| 862 | }; |
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| 863 | |
---|
| 864 | /// Expression containing a deleted identifier. |
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| 865 | /// Internal to resolver. |
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| 866 | class DeletedExpr final : public Expr { |
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| 867 | public: |
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| 868 | ptr<Expr> expr; |
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[e67991f] | 869 | readonly<Decl> deleteStmt; |
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[9b4f329] | 870 | |
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[e67991f] | 871 | DeletedExpr( const CodeLocation & loc, const Expr * e, const Decl * del ) |
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[9b4f329] | 872 | : Expr( loc, e->result ), expr( e ), deleteStmt( del ) { assert( expr->result ); } |
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| 873 | |
---|
| 874 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 875 | private: |
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| 876 | DeletedExpr * clone() const override { return new DeletedExpr{ *this }; } |
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| 877 | MUTATE_FRIEND |
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| 878 | }; |
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| 879 | |
---|
| 880 | /// Use of a default argument. |
---|
| 881 | /// Internal to resolver. |
---|
| 882 | class DefaultArgExpr final : public Expr { |
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| 883 | public: |
---|
| 884 | ptr<Expr> expr; |
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| 885 | |
---|
| 886 | DefaultArgExpr( const CodeLocation & loc, const Expr * e ) |
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| 887 | : Expr( loc, e->result ), expr( e ) { assert( e->result ); } |
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| 888 | |
---|
| 889 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 890 | private: |
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| 891 | DefaultArgExpr * clone() const override { return new DefaultArgExpr{ *this }; } |
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| 892 | MUTATE_FRIEND |
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| 893 | }; |
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| 894 | |
---|
| 895 | /// C11 _Generic expression |
---|
| 896 | class GenericExpr final : public Expr { |
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| 897 | public: |
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| 898 | /// One arm of the _Generic expr |
---|
| 899 | struct Association { |
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| 900 | ptr<Type> type; |
---|
| 901 | ptr<Expr> expr; |
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| 902 | |
---|
| 903 | Association() = default; |
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| 904 | // default case |
---|
| 905 | Association( const Expr * e ) : type(), expr( e ) {} |
---|
| 906 | // non-default case |
---|
| 907 | Association( const Type * t, const Expr * e ) : type( t ), expr( e ) {} |
---|
| 908 | }; |
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| 909 | |
---|
| 910 | ptr<Expr> control; |
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| 911 | std::vector<Association> associations; |
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| 912 | |
---|
| 913 | GenericExpr( const CodeLocation & loc, const Expr * ctrl, std::vector<Association> && assns ) |
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| 914 | : Expr( loc ), control( ctrl ), associations( std::move(assns) ) {} |
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| 915 | |
---|
| 916 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 917 | private: |
---|
| 918 | GenericExpr * clone() const override { return new GenericExpr{ *this }; } |
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| 919 | MUTATE_FRIEND |
---|
[54e41b3] | 920 | }; |
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[6d51bd7] | 921 | |
---|
[246c245] | 922 | |
---|
[79f7875] | 923 | } |
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| 924 | |
---|
[f3cc5b6] | 925 | #undef MUTATE_FRIEND |
---|
| 926 | |
---|
[79f7875] | 927 | // Local Variables: // |
---|
| 928 | // tab-width: 4 // |
---|
| 929 | // mode: c++ // |
---|
| 930 | // compile-command: "make install" // |
---|
| 931 | // End: // |
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