[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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[0e6aba06] | 13 | // Update Count : 8 |
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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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[79f7875] | 37 | namespace ast { |
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| 38 | |
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[6d51bd7] | 39 | /// Contains the ID of a declaration and a type that is derived from that declaration, |
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[79f7875] | 40 | /// but subject to decay-to-pointer and type parameter renaming |
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| 41 | struct ParamEntry { |
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| 42 | UniqueId decl; |
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[07d867b] | 43 | readonly<Decl> declptr; |
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[79f7875] | 44 | ptr<Type> actualType; |
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| 45 | ptr<Type> formalType; |
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| 46 | ptr<Expr> expr; |
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| 47 | |
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[aaeacf4] | 48 | ParamEntry() : decl( 0 ), declptr( nullptr ), actualType( nullptr ), formalType( nullptr ), expr( nullptr ) {} |
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[7870799] | 49 | ParamEntry( |
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| 50 | UniqueId id, const Decl * declptr, const Type * actual, const Type * formal, |
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[b69233ac] | 51 | const Expr * e ) |
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[aaeacf4] | 52 | : decl( id ), declptr( declptr ), actualType( actual ), formalType( formal ), expr( e ) {} |
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[46da46b] | 53 | |
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| 54 | operator bool() {return declptr;} |
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[79f7875] | 55 | }; |
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| 56 | |
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| 57 | /// Pre-resolution list of parameters to infer |
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| 58 | using ResnSlots = std::vector<UniqueId>; |
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| 59 | /// Post-resolution map of inferred parameters |
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| 60 | using InferredParams = std::map< UniqueId, ParamEntry >; |
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| 61 | |
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| 62 | /// Base node for expressions |
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| 63 | class Expr : public ParseNode { |
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| 64 | public: |
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[07d867b] | 65 | /* |
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| 66 | * NOTE: the union approach is incorrect until the case of |
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| 67 | * partial resolution in InferMatcher is eliminated. |
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| 68 | * it is reverted to allow unresolved and resolved parameters |
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| 69 | * to coexist in an expression node. |
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| 70 | */ |
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[79f7875] | 71 | struct InferUnion { |
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[07d867b] | 72 | // mode is now unused |
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[79f7875] | 73 | enum { Empty, Slots, Params } mode; |
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[07d867b] | 74 | struct data_t { |
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| 75 | // char def; |
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| 76 | ResnSlots * resnSlots; |
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| 77 | InferredParams * inferParams; |
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| 78 | |
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| 79 | data_t(): resnSlots(nullptr), inferParams(nullptr) {} |
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| 80 | data_t(const data_t &other) = delete; |
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| 81 | ~data_t() { |
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| 82 | delete resnSlots; |
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| 83 | delete inferParams; |
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| 84 | } |
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[79f7875] | 85 | } data; |
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| 86 | |
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| 87 | /// initializes from other InferUnion |
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[0e6aba06] | 88 | void init_from( const InferUnion & o ) { |
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[07d867b] | 89 | if (o.data.resnSlots) { |
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| 90 | data.resnSlots = new ResnSlots(*o.data.resnSlots); |
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| 91 | } |
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| 92 | if (o.data.inferParams) { |
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| 93 | data.inferParams = new InferredParams(*o.data.inferParams); |
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[79f7875] | 94 | } |
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| 95 | } |
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| 96 | |
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| 97 | /// initializes from other InferUnion (move semantics) |
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[0e6aba06] | 98 | void init_from( InferUnion && o ) { |
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[07d867b] | 99 | data.resnSlots = o.data.resnSlots; |
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| 100 | data.inferParams = o.data.inferParams; |
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| 101 | o.data.resnSlots = nullptr; |
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| 102 | o.data.inferParams = nullptr; |
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[79f7875] | 103 | } |
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| 104 | |
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| 105 | InferUnion() : mode(Empty), data() {} |
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[0e6aba06] | 106 | InferUnion( const InferUnion & o ) : mode( o.mode ), data() { init_from( o ); } |
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| 107 | InferUnion( InferUnion && o ) : mode( o.mode ), data() { init_from( std::move(o) ); } |
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| 108 | InferUnion & operator= ( const InferUnion & ) = delete; |
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| 109 | InferUnion & operator= ( InferUnion && ) = delete; |
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[07d867b] | 110 | |
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| 111 | bool hasSlots() const { return data.resnSlots; } |
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[b3a0df6] | 112 | bool hasParams() const { return data.inferParams; } |
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[79f7875] | 113 | |
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[0e6aba06] | 114 | ResnSlots & resnSlots() { |
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[07d867b] | 115 | if (!data.resnSlots) { |
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| 116 | data.resnSlots = new ResnSlots(); |
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[79f7875] | 117 | } |
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[07d867b] | 118 | return *data.resnSlots; |
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[19e567dd] | 119 | } |
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| 120 | |
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[0e6aba06] | 121 | const ResnSlots & resnSlots() const { |
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[07d867b] | 122 | if (data.resnSlots) { |
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| 123 | return *data.resnSlots; |
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[19e567dd] | 124 | } |
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[7870799] | 125 | assertf(false, "Mode was not already resnSlots"); |
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| 126 | abort(); |
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[79f7875] | 127 | } |
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| 128 | |
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[0e6aba06] | 129 | InferredParams & inferParams() { |
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[07d867b] | 130 | if (!data.inferParams) { |
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| 131 | data.inferParams = new InferredParams(); |
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[79f7875] | 132 | } |
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[07d867b] | 133 | return *data.inferParams; |
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[19e567dd] | 134 | } |
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| 135 | |
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[0e6aba06] | 136 | const InferredParams & inferParams() const { |
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[07d867b] | 137 | if (data.inferParams) { |
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| 138 | return *data.inferParams; |
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[19e567dd] | 139 | } |
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[7870799] | 140 | assertf(false, "Mode was not already Params"); |
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| 141 | abort(); |
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[79f7875] | 142 | } |
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[60aaa51d] | 143 | |
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[07d867b] | 144 | void set_inferParams( InferredParams * ps ) { |
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| 145 | delete data.resnSlots; |
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| 146 | data.resnSlots = nullptr; |
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| 147 | delete data.inferParams; |
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| 148 | data.inferParams = ps; |
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[b69233ac] | 149 | } |
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| 150 | |
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[aaeacf4] | 151 | /// splices other InferUnion into this one. Will fail if one union is in `Slots` mode |
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[60aaa51d] | 152 | /// and the other is in `Params`. |
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| 153 | void splice( InferUnion && o ) { |
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[07d867b] | 154 | if (o.data.resnSlots) { |
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| 155 | if (data.resnSlots) { |
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| 156 | data.resnSlots->insert( |
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| 157 | data.resnSlots->end(), o.data.resnSlots->begin(), o.data.resnSlots->end() ); |
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| 158 | delete o.data.resnSlots; |
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| 159 | } |
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| 160 | else { |
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| 161 | data.resnSlots = o.data.resnSlots; |
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[60aaa51d] | 162 | } |
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[07d867b] | 163 | o.data.resnSlots = nullptr; |
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| 164 | } |
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| 165 | |
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| 166 | if (o.data.inferParams) { |
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| 167 | if (data.inferParams) { |
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| 168 | for ( const auto & p : *o.data.inferParams ) { |
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| 169 | (*data.inferParams)[p.first] = std::move(p.second); |
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| 170 | } |
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| 171 | delete o.data.inferParams; |
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| 172 | } |
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| 173 | else { |
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| 174 | data.inferParams = o.data.inferParams; |
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| 175 | } |
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| 176 | o.data.inferParams = nullptr; |
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| 177 | } |
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[60aaa51d] | 178 | } |
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[79f7875] | 179 | }; |
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| 180 | |
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| 181 | ptr<Type> result; |
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| 182 | ptr<TypeSubstitution> env; |
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| 183 | InferUnion inferred; |
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| 184 | bool extension = false; |
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| 185 | |
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[54e41b3] | 186 | Expr( const CodeLocation & loc, const Type * res = nullptr ) |
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| 187 | : ParseNode( loc ), result( res ), env(), inferred() {} |
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[79f7875] | 188 | |
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[cf32116] | 189 | virtual bool get_lvalue() const; |
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[79f7875] | 190 | |
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[69bafd2] | 191 | virtual const Expr * accept( Visitor & v ) const override = 0; |
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[79f7875] | 192 | private: |
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[23f99e1] | 193 | Expr * clone() const override = 0; |
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[f3cc5b6] | 194 | MUTATE_FRIEND |
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[264e691] | 195 | }; |
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| 196 | |
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[87701b6] | 197 | /// The application of a function to a set of parameters. |
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[54e41b3] | 198 | /// Post-resolver form of `UntypedExpr` |
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| 199 | class ApplicationExpr final : public Expr { |
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| 200 | public: |
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| 201 | ptr<Expr> func; |
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| 202 | std::vector<ptr<Expr>> args; |
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| 203 | |
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| 204 | ApplicationExpr( const CodeLocation & loc, const Expr * f, std::vector<ptr<Expr>> && as = {} ); |
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| 205 | |
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[cf32116] | 206 | bool get_lvalue() const final; |
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| 207 | |
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[54e41b3] | 208 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 209 | private: |
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| 210 | ApplicationExpr * clone() const override { return new ApplicationExpr{ *this }; } |
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[f3cc5b6] | 211 | MUTATE_FRIEND |
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[54e41b3] | 212 | }; |
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| 213 | |
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| 214 | /// The application of a function to a set of parameters, pre-overload resolution. |
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| 215 | class UntypedExpr final : public Expr { |
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| 216 | public: |
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| 217 | ptr<Expr> func; |
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| 218 | std::vector<ptr<Expr>> args; |
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| 219 | |
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| 220 | UntypedExpr( const CodeLocation & loc, const Expr * f, std::vector<ptr<Expr>> && as = {} ) |
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| 221 | : Expr( loc ), func( f ), args( std::move(as) ) {} |
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| 222 | |
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[cf32116] | 223 | bool get_lvalue() const final; |
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| 224 | |
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[54e41b3] | 225 | /// Creates a new dereference expression |
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[490fb92e] | 226 | static UntypedExpr * createDeref( const CodeLocation & loc, const Expr * arg ); |
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[54e41b3] | 227 | /// Creates a new assignment expression |
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[490fb92e] | 228 | static UntypedExpr * createAssign( const CodeLocation & loc, const Expr * lhs, const Expr * rhs ); |
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[e6cf857f] | 229 | /// Creates a new call of a variable. |
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| 230 | static UntypedExpr * createCall( const CodeLocation & loc, |
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| 231 | const std::string & name, std::vector<ptr<Expr>> && args ); |
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[54e41b3] | 232 | |
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| 233 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 234 | private: |
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| 235 | UntypedExpr * clone() const override { return new UntypedExpr{ *this }; } |
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[f3cc5b6] | 236 | MUTATE_FRIEND |
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[54e41b3] | 237 | }; |
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| 238 | |
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| 239 | /// A name whose name is as-yet undetermined. |
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| 240 | /// May also be used to avoid name mangling in codegen phase. |
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| 241 | class NameExpr final : public Expr { |
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| 242 | public: |
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| 243 | std::string name; |
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| 244 | |
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| 245 | NameExpr( const CodeLocation & loc, const std::string & n ) : Expr( loc ), name( n ) {} |
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| 246 | |
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| 247 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 248 | private: |
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| 249 | NameExpr * clone() const override { return new NameExpr{ *this }; } |
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[f3cc5b6] | 250 | MUTATE_FRIEND |
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[54e41b3] | 251 | }; |
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| 252 | |
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[94c98f0e] | 253 | /// A name qualified by a namespace or type. |
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[b0d9ff7] | 254 | class QualifiedNameExpr final : public Expr { |
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| 255 | public: |
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| 256 | ptr<Decl> type_decl; |
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[85855b0] | 257 | const std::string type_name; |
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| 258 | const std::string name; |
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[b0d9ff7] | 259 | |
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[94c98f0e] | 260 | QualifiedNameExpr( const CodeLocation & loc, const Decl * d, const std::string & n ) |
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[85855b0] | 261 | : Expr( loc ), type_decl( d ), type_name(""), name( n ) {} |
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| 262 | |
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| 263 | QualifiedNameExpr( const CodeLocation & loc, const std::string & type_name, const std::string & name) |
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| 264 | : Expr( loc ), type_name( type_name ), name( name ) {} |
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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 | |
---|
[cf32116] | 434 | bool get_lvalue() const final; |
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| 435 | |
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[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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[54e41b3] | 440 | }; |
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| 441 | |
---|
[c36298d] | 442 | /// A compile-time constant. |
---|
| 443 | /// Mostly carries C-source text from parse to code-gen, without interpretation. E.g. strings keep their outer quotes and never have backslashes interpreted. |
---|
| 444 | /// Integer constants get special treatment, e.g. for verifying array operations, when an integer constant occurs as the length of an array. |
---|
[54e41b3] | 445 | class ConstantExpr final : public Expr { |
---|
| 446 | public: |
---|
[c36298d] | 447 | // Representation of this constant, as it occurs in .cfa source and .cfa.cc result. |
---|
[54e41b3] | 448 | std::string rep; |
---|
| 449 | |
---|
[87701b6] | 450 | ConstantExpr( |
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[7870799] | 451 | const CodeLocation & loc, const Type * ty, const std::string & r, |
---|
[c4570af3] | 452 | const std::optional<unsigned long long> & i ) |
---|
| 453 | : Expr( loc, ty ), rep( r ), ival( i ) {} |
---|
[87701b6] | 454 | |
---|
[c36298d] | 455 | /// Gets the integer value of this constant, if one is appropriate to its type. |
---|
| 456 | /// Throws a SemanticError if the type is not appropriate for value-as-integer. |
---|
| 457 | /// Suffers an assertion failure the type is appropriate but no integer value was supplied to the constructor. |
---|
[54e41b3] | 458 | long long int intValue() const; |
---|
| 459 | |
---|
[b91bfde] | 460 | /// Generates a boolean constant of the given bool. |
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[54e41b3] | 461 | static ConstantExpr * from_bool( const CodeLocation & loc, bool b ); |
---|
[b91bfde] | 462 | /// Generates an integer constant of the given int. |
---|
[54e41b3] | 463 | static ConstantExpr * from_int( const CodeLocation & loc, int i ); |
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[b91bfde] | 464 | /// Generates an integer constant of the given unsigned long int. |
---|
[54e41b3] | 465 | static ConstantExpr * from_ulong( const CodeLocation & loc, unsigned long i ); |
---|
[b91bfde] | 466 | /// Generates a string constant from the given string (char type, unquoted string). |
---|
| 467 | static ConstantExpr * from_string( const CodeLocation & loc, const std::string & string ); |
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| 468 | /// Generates a null pointer value for the given type. void * if omitted. |
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[54e41b3] | 469 | static ConstantExpr * null( const CodeLocation & loc, const Type * ptrType = nullptr ); |
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| 470 | |
---|
| 471 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 472 | private: |
---|
| 473 | ConstantExpr * clone() const override { return new ConstantExpr{ *this }; } |
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[f3cc5b6] | 474 | MUTATE_FRIEND |
---|
[c36298d] | 475 | |
---|
| 476 | std::optional<unsigned long long> ival; |
---|
[54e41b3] | 477 | }; |
---|
| 478 | |
---|
| 479 | /// sizeof expression, e.g. `sizeof(int)`, `sizeof 3+4` |
---|
| 480 | class SizeofExpr final : public Expr { |
---|
| 481 | public: |
---|
| 482 | ptr<Type> type; |
---|
| 483 | |
---|
| 484 | SizeofExpr( const CodeLocation & loc, const Type * t ); |
---|
| 485 | |
---|
| 486 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 487 | private: |
---|
| 488 | SizeofExpr * clone() const override { return new SizeofExpr{ *this }; } |
---|
[f3cc5b6] | 489 | MUTATE_FRIEND |
---|
[54e41b3] | 490 | }; |
---|
| 491 | |
---|
[525f7ad] | 492 | class CountExpr final : public Expr { |
---|
| 493 | public: |
---|
[0c327ce] | 494 | ptr<Expr> expr; |
---|
[525f7ad] | 495 | ptr<Type> type; |
---|
| 496 | |
---|
[0c327ce] | 497 | CountExpr( const CodeLocation & loc, const Expr * t ); |
---|
[525f7ad] | 498 | CountExpr( const CodeLocation & loc, const Type * t ); |
---|
| 499 | |
---|
| 500 | const Expr * accept( Visitor & v )const override { return v.visit( this ); } |
---|
| 501 | private: |
---|
| 502 | CountExpr * clone() const override { return new CountExpr( *this ); } |
---|
| 503 | MUTATE_FRIEND |
---|
| 504 | }; |
---|
| 505 | |
---|
[54e41b3] | 506 | /// alignof expression, e.g. `alignof(int)`, `alignof 3+4` |
---|
| 507 | class AlignofExpr final : public Expr { |
---|
| 508 | public: |
---|
| 509 | ptr<Type> type; |
---|
| 510 | |
---|
| 511 | AlignofExpr( const CodeLocation & loc, const Type * t ); |
---|
| 512 | |
---|
| 513 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 514 | private: |
---|
| 515 | AlignofExpr * clone() const override { return new AlignofExpr{ *this }; } |
---|
[f3cc5b6] | 516 | MUTATE_FRIEND |
---|
[54e41b3] | 517 | }; |
---|
| 518 | |
---|
| 519 | /// offsetof expression before resolver determines field, e.g. `offsetof(MyStruct, myfield)` |
---|
| 520 | class UntypedOffsetofExpr final : public Expr { |
---|
| 521 | public: |
---|
| 522 | ptr<Type> type; |
---|
| 523 | std::string member; |
---|
| 524 | |
---|
| 525 | UntypedOffsetofExpr( const CodeLocation & loc, const Type * ty, const std::string & mem ) |
---|
| 526 | : Expr( loc ), type( ty ), member( mem ) {} |
---|
| 527 | |
---|
| 528 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 529 | private: |
---|
| 530 | UntypedOffsetofExpr * clone() const override { return new UntypedOffsetofExpr{ *this }; } |
---|
[f3cc5b6] | 531 | MUTATE_FRIEND |
---|
[54e41b3] | 532 | }; |
---|
| 533 | |
---|
| 534 | /// offsetof expression after resolver determines field, e.g. `offsetof(MyStruct, myfield)` |
---|
| 535 | class OffsetofExpr final : public Expr { |
---|
| 536 | public: |
---|
| 537 | ptr<Type> type; |
---|
| 538 | readonly<DeclWithType> member; |
---|
| 539 | |
---|
| 540 | OffsetofExpr( const CodeLocation & loc, const Type * ty, const DeclWithType * mem ); |
---|
| 541 | |
---|
| 542 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 543 | private: |
---|
| 544 | OffsetofExpr * clone() const override { return new OffsetofExpr{ *this }; } |
---|
[f3cc5b6] | 545 | MUTATE_FRIEND |
---|
[54e41b3] | 546 | }; |
---|
| 547 | |
---|
| 548 | /// a pack of field-offsets for a generic type |
---|
| 549 | class OffsetPackExpr final : public Expr { |
---|
| 550 | public: |
---|
| 551 | ptr<StructInstType> type; |
---|
| 552 | |
---|
| 553 | OffsetPackExpr( const CodeLocation & loc, const StructInstType * ty ); |
---|
| 554 | |
---|
| 555 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 556 | private: |
---|
| 557 | OffsetPackExpr * clone() const override { return new OffsetPackExpr{ *this }; } |
---|
[f3cc5b6] | 558 | MUTATE_FRIEND |
---|
[54e41b3] | 559 | }; |
---|
| 560 | |
---|
| 561 | /// Variants of short-circuiting logical expression |
---|
| 562 | enum LogicalFlag { OrExpr, AndExpr }; |
---|
| 563 | |
---|
| 564 | /// Short-circuiting boolean expression (`&&` or `||`) |
---|
| 565 | class LogicalExpr final : public Expr { |
---|
| 566 | public: |
---|
| 567 | ptr<Expr> arg1; |
---|
| 568 | ptr<Expr> arg2; |
---|
| 569 | LogicalFlag isAnd; |
---|
| 570 | |
---|
| 571 | LogicalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, LogicalFlag ia ); |
---|
| 572 | |
---|
| 573 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 574 | private: |
---|
| 575 | LogicalExpr * clone() const override { return new LogicalExpr{ *this }; } |
---|
[f3cc5b6] | 576 | MUTATE_FRIEND |
---|
[54e41b3] | 577 | }; |
---|
| 578 | |
---|
| 579 | /// Three-argument conditional e.g. `p ? a : b` |
---|
| 580 | class ConditionalExpr final : public Expr { |
---|
| 581 | public: |
---|
| 582 | ptr<Expr> arg1; |
---|
| 583 | ptr<Expr> arg2; |
---|
| 584 | ptr<Expr> arg3; |
---|
| 585 | |
---|
| 586 | ConditionalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, const Expr * a3 ) |
---|
| 587 | : Expr( loc ), arg1( a1 ), arg2( a2 ), arg3( a3 ) {} |
---|
| 588 | |
---|
| 589 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 590 | private: |
---|
| 591 | ConditionalExpr * clone() const override { return new ConditionalExpr{ *this }; } |
---|
[f3cc5b6] | 592 | MUTATE_FRIEND |
---|
[54e41b3] | 593 | }; |
---|
| 594 | |
---|
| 595 | /// Comma expression e.g. `( a , b )` |
---|
| 596 | class CommaExpr final : public Expr { |
---|
| 597 | public: |
---|
| 598 | ptr<Expr> arg1; |
---|
| 599 | ptr<Expr> arg2; |
---|
| 600 | |
---|
[87701b6] | 601 | CommaExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2 ) |
---|
[4e13e2a] | 602 | : Expr( loc ), arg1( a1 ), arg2( a2 ) { |
---|
| 603 | this->result = a2->result; |
---|
| 604 | } |
---|
[54e41b3] | 605 | |
---|
[cf32116] | 606 | bool get_lvalue() const final; |
---|
| 607 | |
---|
[54e41b3] | 608 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 609 | private: |
---|
| 610 | CommaExpr * clone() const override { return new CommaExpr{ *this }; } |
---|
[f3cc5b6] | 611 | MUTATE_FRIEND |
---|
[54e41b3] | 612 | }; |
---|
| 613 | |
---|
[264e691] | 614 | /// A type used as an expression (e.g. a type generator parameter) |
---|
| 615 | class TypeExpr final : public Expr { |
---|
| 616 | public: |
---|
| 617 | ptr<Type> type; |
---|
| 618 | |
---|
| 619 | TypeExpr( const CodeLocation & loc, const Type * t ) : Expr(loc), type(t) {} |
---|
| 620 | |
---|
[69bafd2] | 621 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
[264e691] | 622 | private: |
---|
| 623 | TypeExpr * clone() const override { return new TypeExpr{ *this }; } |
---|
[f3cc5b6] | 624 | MUTATE_FRIEND |
---|
[79f7875] | 625 | }; |
---|
| 626 | |
---|
[94c98f0e] | 627 | /// A name that refers to a generic dimension parameter. |
---|
[4ec9513] | 628 | class DimensionExpr final : public Expr { |
---|
| 629 | public: |
---|
| 630 | std::string name; |
---|
| 631 | |
---|
| 632 | DimensionExpr( const CodeLocation & loc, std::string name ) |
---|
| 633 | : Expr( loc ), name( name ) {} |
---|
| 634 | |
---|
| 635 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 636 | private: |
---|
| 637 | DimensionExpr * clone() const override { return new DimensionExpr{ *this }; } |
---|
| 638 | MUTATE_FRIEND |
---|
| 639 | }; |
---|
| 640 | |
---|
[54e41b3] | 641 | /// A GCC "asm constraint operand" used in an asm statement, e.g. `[output] "=f" (result)`. |
---|
| 642 | /// https://gcc.gnu.org/onlinedocs/gcc-4.7.1/gcc/Machine-Constraints.html#Machine-Constraints |
---|
| 643 | class AsmExpr final : public Expr { |
---|
| 644 | public: |
---|
[665f432] | 645 | std::string inout; |
---|
[9b4f329] | 646 | ptr<Expr> constraint; |
---|
| 647 | ptr<Expr> operand; |
---|
| 648 | |
---|
[665f432] | 649 | AsmExpr( const CodeLocation & loc, const std::string & io, const Expr * con, const Expr * op ) |
---|
[9b4f329] | 650 | : Expr( loc ), inout( io ), constraint( con ), operand( op ) {} |
---|
| 651 | |
---|
| 652 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 653 | private: |
---|
| 654 | AsmExpr * clone() const override { return new AsmExpr{ *this }; } |
---|
| 655 | MUTATE_FRIEND |
---|
| 656 | }; |
---|
| 657 | |
---|
[17a0228a] | 658 | /// The application of a function to a set of parameters, along with a set of copy constructor |
---|
[9b4f329] | 659 | /// calls, one for each argument |
---|
| 660 | class ImplicitCopyCtorExpr final : public Expr { |
---|
| 661 | public: |
---|
| 662 | ptr<ApplicationExpr> callExpr; |
---|
| 663 | |
---|
[0e6aba06] | 664 | ImplicitCopyCtorExpr( const CodeLocation & loc, const ApplicationExpr * call ) |
---|
[490fb92e] | 665 | : Expr( loc, call->result ), callExpr(call) { assert( call ); assert(call->result); } |
---|
[9b4f329] | 666 | |
---|
| 667 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 668 | private: |
---|
| 669 | ImplicitCopyCtorExpr * clone() const override { return new ImplicitCopyCtorExpr{ *this }; } |
---|
| 670 | MUTATE_FRIEND |
---|
| 671 | }; |
---|
| 672 | |
---|
| 673 | /// Constructor in expression context, e.g. `int * x = alloc() { 42 };` |
---|
| 674 | class ConstructorExpr final : public Expr { |
---|
| 675 | public: |
---|
| 676 | ptr<Expr> callExpr; |
---|
| 677 | |
---|
| 678 | ConstructorExpr( const CodeLocation & loc, const Expr * call ); |
---|
| 679 | |
---|
| 680 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 681 | private: |
---|
| 682 | ConstructorExpr * clone() const override { return new ConstructorExpr{ *this }; } |
---|
| 683 | MUTATE_FRIEND |
---|
| 684 | }; |
---|
| 685 | |
---|
| 686 | /// A C99 compound literal, e.g. `(MyType){ a, b, c }` |
---|
| 687 | class CompoundLiteralExpr final : public Expr { |
---|
| 688 | public: |
---|
| 689 | ptr<Init> init; |
---|
| 690 | |
---|
| 691 | CompoundLiteralExpr( const CodeLocation & loc, const Type * t, const Init * i ); |
---|
| 692 | |
---|
[cf32116] | 693 | bool get_lvalue() const final; |
---|
| 694 | |
---|
[9b4f329] | 695 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 696 | private: |
---|
| 697 | CompoundLiteralExpr * clone() const override { return new CompoundLiteralExpr{ *this }; } |
---|
| 698 | MUTATE_FRIEND |
---|
| 699 | }; |
---|
| 700 | |
---|
| 701 | /// A range, e.g. `3 ... 5` or `1~10` |
---|
| 702 | class RangeExpr final : public Expr { |
---|
| 703 | public: |
---|
| 704 | ptr<Expr> low; |
---|
| 705 | ptr<Expr> high; |
---|
| 706 | |
---|
| 707 | RangeExpr( const CodeLocation & loc, const Expr * l, const Expr * h ) |
---|
| 708 | : Expr( loc ), low( l ), high( h ) {} |
---|
| 709 | |
---|
| 710 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 711 | private: |
---|
| 712 | RangeExpr * clone() const override { return new RangeExpr{ *this }; } |
---|
| 713 | MUTATE_FRIEND |
---|
| 714 | }; |
---|
| 715 | |
---|
| 716 | /// A tuple expression before resolution, e.g. `[a, b, c]` |
---|
| 717 | class UntypedTupleExpr final : public Expr { |
---|
| 718 | public: |
---|
| 719 | std::vector<ptr<Expr>> exprs; |
---|
| 720 | |
---|
| 721 | UntypedTupleExpr( const CodeLocation & loc, std::vector<ptr<Expr>> && xs ) |
---|
| 722 | : Expr( loc ), exprs( std::move(xs) ) {} |
---|
| 723 | |
---|
| 724 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 725 | private: |
---|
| 726 | UntypedTupleExpr * clone() const override { return new UntypedTupleExpr{ *this }; } |
---|
| 727 | MUTATE_FRIEND |
---|
| 728 | }; |
---|
| 729 | |
---|
| 730 | /// A tuple expression after resolution, e.g. `[a, b, c]` |
---|
| 731 | class TupleExpr final : public Expr { |
---|
| 732 | public: |
---|
| 733 | std::vector<ptr<Expr>> exprs; |
---|
| 734 | |
---|
| 735 | TupleExpr( const CodeLocation & loc, std::vector<ptr<Expr>> && xs ); |
---|
| 736 | |
---|
| 737 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 738 | private: |
---|
| 739 | TupleExpr * clone() const override { return new TupleExpr{ *this }; } |
---|
| 740 | MUTATE_FRIEND |
---|
| 741 | }; |
---|
| 742 | |
---|
| 743 | /// An element selection operation on a tuple value, e.g. `t.3` after analysis |
---|
| 744 | class TupleIndexExpr final : public Expr { |
---|
| 745 | public: |
---|
| 746 | ptr<Expr> tuple; |
---|
| 747 | unsigned index; |
---|
| 748 | |
---|
| 749 | TupleIndexExpr( const CodeLocation & loc, const Expr * t, unsigned i ); |
---|
| 750 | |
---|
[cf32116] | 751 | bool get_lvalue() const final; |
---|
| 752 | |
---|
[9b4f329] | 753 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 754 | private: |
---|
| 755 | TupleIndexExpr * clone() const override { return new TupleIndexExpr{ *this }; } |
---|
| 756 | MUTATE_FRIEND |
---|
| 757 | }; |
---|
| 758 | |
---|
[17a0228a] | 759 | /// A multiple- or mass-assignment operation, or a tuple ctor/dtor expression. |
---|
| 760 | /// multiple-assignment: both sides of the assignment have tuple type, |
---|
[9b4f329] | 761 | /// e.g. `[a, b, c] = [d, e, f];` |
---|
| 762 | /// mass-assignment: left-hand side has tuple type and right-hand side does not: |
---|
| 763 | /// e.g. `[a, b, c] = 42;` |
---|
| 764 | class TupleAssignExpr final : public Expr { |
---|
| 765 | public: |
---|
| 766 | ptr<StmtExpr> stmtExpr; |
---|
| 767 | |
---|
[17a0228a] | 768 | TupleAssignExpr( |
---|
| 769 | const CodeLocation & loc, std::vector<ptr<Expr>> && assigns, |
---|
[9b4f329] | 770 | std::vector<ptr<ObjectDecl>> && tempDecls ); |
---|
[17a0228a] | 771 | |
---|
[9b4f329] | 772 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
[20de6fb] | 773 | |
---|
[9b4f329] | 774 | private: |
---|
| 775 | TupleAssignExpr * clone() const override { return new TupleAssignExpr{ *this }; } |
---|
| 776 | MUTATE_FRIEND |
---|
| 777 | }; |
---|
| 778 | |
---|
| 779 | /// A GCC "statement expression", e.g. `({ int x = 5; x })` |
---|
| 780 | class StmtExpr final : public Expr { |
---|
| 781 | public: |
---|
| 782 | ptr<CompoundStmt> stmts; |
---|
| 783 | std::vector<ptr<ObjectDecl>> returnDecls; ///< return variable(s) for statement expression |
---|
| 784 | std::vector<ptr<Expr>> dtors; ///< destructor(s) for return variable(s) |
---|
| 785 | |
---|
[490fb92e] | 786 | readonly<ExprStmt> resultExpr; |
---|
| 787 | |
---|
[9b4f329] | 788 | StmtExpr( const CodeLocation & loc, const CompoundStmt * ss ); |
---|
| 789 | |
---|
| 790 | /// Set the result type of this StmtExpr based on its body |
---|
| 791 | void computeResult(); |
---|
| 792 | |
---|
| 793 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 794 | private: |
---|
| 795 | StmtExpr * clone() const override { return new StmtExpr{ *this }; } |
---|
| 796 | MUTATE_FRIEND |
---|
| 797 | }; |
---|
| 798 | |
---|
| 799 | /// An expression which must only be evaluated once |
---|
[3249dd8b] | 800 | class UniqueExpr final : public Expr { |
---|
[9b4f329] | 801 | static unsigned long long nextId; |
---|
| 802 | public: |
---|
| 803 | ptr<Expr> expr; |
---|
[7edd5c1] | 804 | readonly<ObjectDecl> object; |
---|
[9b4f329] | 805 | ptr<VariableExpr> var; |
---|
| 806 | unsigned long long id; |
---|
| 807 | |
---|
[d76f32c] | 808 | UniqueExpr( const CodeLocation & loc, const Expr * e, unsigned long long i = -1ull ); |
---|
[9b4f329] | 809 | |
---|
| 810 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 811 | private: |
---|
| 812 | UniqueExpr * clone() const override { return new UniqueExpr{ *this }; } |
---|
| 813 | MUTATE_FRIEND |
---|
| 814 | }; |
---|
| 815 | |
---|
| 816 | /// One option for resolving an initializer expression |
---|
| 817 | struct InitAlternative { |
---|
| 818 | ptr<Type> type; |
---|
| 819 | ptr<Designation> designation; |
---|
| 820 | |
---|
| 821 | InitAlternative() = default; |
---|
| 822 | InitAlternative( const Type * ty, const Designation * des ) : type( ty ), designation( des ) {} |
---|
| 823 | }; |
---|
| 824 | |
---|
| 825 | /// Pre-resolution initializer expression |
---|
| 826 | class UntypedInitExpr final : public Expr { |
---|
| 827 | public: |
---|
| 828 | ptr<Expr> expr; |
---|
[60aaa51d] | 829 | std::deque<InitAlternative> initAlts; |
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[9b4f329] | 830 | |
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[60aaa51d] | 831 | UntypedInitExpr( const CodeLocation & loc, const Expr * e, std::deque<InitAlternative> && as ) |
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[9b4f329] | 832 | : Expr( loc ), expr( e ), initAlts( std::move(as) ) {} |
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| 833 | |
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| 834 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 835 | private: |
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| 836 | UntypedInitExpr * clone() const override { return new UntypedInitExpr{ *this }; } |
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| 837 | MUTATE_FRIEND |
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| 838 | }; |
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| 839 | |
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| 840 | /// Post-resolution initializer expression |
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| 841 | class InitExpr final : public Expr { |
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| 842 | public: |
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| 843 | ptr<Expr> expr; |
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| 844 | ptr<Designation> designation; |
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| 845 | |
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| 846 | InitExpr( const CodeLocation & loc, const Expr * e, const Designation * des ) |
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| 847 | : Expr( loc, e->result ), expr( e ), designation( des ) {} |
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| 848 | |
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| 849 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 850 | private: |
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| 851 | InitExpr * clone() const override { return new InitExpr{ *this }; } |
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| 852 | MUTATE_FRIEND |
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| 853 | }; |
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| 854 | |
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| 855 | /// Expression containing a deleted identifier. |
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| 856 | /// Internal to resolver. |
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| 857 | class DeletedExpr final : public Expr { |
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| 858 | public: |
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| 859 | ptr<Expr> expr; |
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[e67991f] | 860 | readonly<Decl> deleteStmt; |
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[9b4f329] | 861 | |
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[e67991f] | 862 | DeletedExpr( const CodeLocation & loc, const Expr * e, const Decl * del ) |
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[9b4f329] | 863 | : Expr( loc, e->result ), expr( e ), deleteStmt( del ) { assert( expr->result ); } |
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| 864 | |
---|
| 865 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 866 | private: |
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| 867 | DeletedExpr * clone() const override { return new DeletedExpr{ *this }; } |
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| 868 | MUTATE_FRIEND |
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| 869 | }; |
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| 870 | |
---|
| 871 | /// Use of a default argument. |
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| 872 | /// Internal to resolver. |
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| 873 | class DefaultArgExpr final : public Expr { |
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| 874 | public: |
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| 875 | ptr<Expr> expr; |
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| 876 | |
---|
| 877 | DefaultArgExpr( const CodeLocation & loc, const Expr * e ) |
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| 878 | : Expr( loc, e->result ), expr( e ) { assert( e->result ); } |
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| 879 | |
---|
| 880 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 881 | private: |
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| 882 | DefaultArgExpr * clone() const override { return new DefaultArgExpr{ *this }; } |
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| 883 | MUTATE_FRIEND |
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| 884 | }; |
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| 885 | |
---|
| 886 | /// C11 _Generic expression |
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| 887 | class GenericExpr final : public Expr { |
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| 888 | public: |
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| 889 | /// One arm of the _Generic expr |
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| 890 | struct Association { |
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| 891 | ptr<Type> type; |
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| 892 | ptr<Expr> expr; |
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| 893 | |
---|
| 894 | Association() = default; |
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| 895 | // default case |
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| 896 | Association( const Expr * e ) : type(), expr( e ) {} |
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| 897 | // non-default case |
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| 898 | Association( const Type * t, const Expr * e ) : type( t ), expr( e ) {} |
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| 899 | }; |
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| 900 | |
---|
| 901 | ptr<Expr> control; |
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| 902 | std::vector<Association> associations; |
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| 903 | |
---|
| 904 | GenericExpr( const CodeLocation & loc, const Expr * ctrl, std::vector<Association> && assns ) |
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| 905 | : Expr( loc ), control( ctrl ), associations( std::move(assns) ) {} |
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| 906 | |
---|
| 907 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 908 | private: |
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| 909 | GenericExpr * clone() const override { return new GenericExpr{ *this }; } |
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| 910 | MUTATE_FRIEND |
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[54e41b3] | 911 | }; |
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[6d51bd7] | 912 | |
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[79f7875] | 913 | } |
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| 914 | |
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[f3cc5b6] | 915 | #undef MUTATE_FRIEND |
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| 916 | |
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[79f7875] | 917 | // Local Variables: // |
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| 918 | // tab-width: 4 // |
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| 919 | // mode: c++ // |
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| 920 | // compile-command: "make install" // |
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| 921 | // End: // |
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