[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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[b69233ac] | 55 | const Expr * e ) |
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[aaeacf4] | 56 | : decl( id ), declptr( declptr ), actualType( actual ), formalType( formal ), expr( e ) {} |
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[79f7875] | 57 | }; |
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| 58 | |
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| 59 | /// Pre-resolution list of parameters to infer |
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| 60 | using ResnSlots = std::vector<UniqueId>; |
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| 61 | /// Post-resolution map of inferred parameters |
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| 62 | using InferredParams = std::map< UniqueId, ParamEntry >; |
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| 63 | |
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| 64 | /// Base node for expressions |
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| 65 | class Expr : public ParseNode { |
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| 66 | public: |
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[07d867b] | 67 | /* |
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| 68 | * NOTE: the union approach is incorrect until the case of |
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| 69 | * partial resolution in InferMatcher is eliminated. |
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| 70 | * it is reverted to allow unresolved and resolved parameters |
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| 71 | * to coexist in an expression node. |
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| 72 | */ |
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[79f7875] | 73 | struct InferUnion { |
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[07d867b] | 74 | // mode is now unused |
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[79f7875] | 75 | enum { Empty, Slots, Params } mode; |
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[07d867b] | 76 | struct data_t { |
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| 77 | // char def; |
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| 78 | ResnSlots * resnSlots; |
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| 79 | InferredParams * inferParams; |
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| 80 | |
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| 81 | data_t(): resnSlots(nullptr), inferParams(nullptr) {} |
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| 82 | data_t(const data_t &other) = delete; |
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| 83 | ~data_t() { |
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| 84 | delete resnSlots; |
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| 85 | delete inferParams; |
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| 86 | } |
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[79f7875] | 87 | } data; |
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| 88 | |
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| 89 | /// initializes from other InferUnion |
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| 90 | void init_from( const InferUnion& o ) { |
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[07d867b] | 91 | if (o.data.resnSlots) { |
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| 92 | data.resnSlots = new ResnSlots(*o.data.resnSlots); |
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| 93 | } |
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| 94 | if (o.data.inferParams) { |
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| 95 | data.inferParams = new InferredParams(*o.data.inferParams); |
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[79f7875] | 96 | } |
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| 97 | } |
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| 98 | |
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| 99 | /// initializes from other InferUnion (move semantics) |
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| 100 | void init_from( InferUnion&& o ) { |
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[07d867b] | 101 | data.resnSlots = o.data.resnSlots; |
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| 102 | data.inferParams = o.data.inferParams; |
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| 103 | o.data.resnSlots = nullptr; |
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| 104 | o.data.inferParams = nullptr; |
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[79f7875] | 105 | } |
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| 106 | |
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| 107 | InferUnion() : mode(Empty), data() {} |
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| 108 | InferUnion( const InferUnion& o ) : mode( o.mode ), data() { init_from( o ); } |
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| 109 | InferUnion( InferUnion&& o ) : mode( o.mode ), data() { init_from( std::move(o) ); } |
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| 110 | InferUnion& operator= ( const InferUnion& ) = delete; |
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| 111 | InferUnion& operator= ( InferUnion&& ) = delete; |
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[07d867b] | 112 | |
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| 113 | bool hasSlots() const { return data.resnSlots; } |
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[79f7875] | 114 | |
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| 115 | ResnSlots& resnSlots() { |
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[07d867b] | 116 | if (!data.resnSlots) { |
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| 117 | data.resnSlots = new ResnSlots(); |
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[79f7875] | 118 | } |
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[07d867b] | 119 | return *data.resnSlots; |
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[19e567dd] | 120 | } |
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| 121 | |
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[60aaa51d] | 122 | const ResnSlots& resnSlots() const { |
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[07d867b] | 123 | if (data.resnSlots) { |
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| 124 | return *data.resnSlots; |
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[19e567dd] | 125 | } |
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[7870799] | 126 | assertf(false, "Mode was not already resnSlots"); |
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| 127 | abort(); |
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[79f7875] | 128 | } |
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| 129 | |
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| 130 | InferredParams& inferParams() { |
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[07d867b] | 131 | if (!data.inferParams) { |
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| 132 | data.inferParams = new InferredParams(); |
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[79f7875] | 133 | } |
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[07d867b] | 134 | return *data.inferParams; |
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[19e567dd] | 135 | } |
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| 136 | |
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[60aaa51d] | 137 | const InferredParams& inferParams() const { |
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[07d867b] | 138 | if (data.inferParams) { |
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| 139 | return *data.inferParams; |
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[19e567dd] | 140 | } |
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[7870799] | 141 | assertf(false, "Mode was not already Params"); |
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| 142 | abort(); |
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[79f7875] | 143 | } |
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[60aaa51d] | 144 | |
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[07d867b] | 145 | void set_inferParams( InferredParams * ps ) { |
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| 146 | delete data.resnSlots; |
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| 147 | data.resnSlots = nullptr; |
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| 148 | delete data.inferParams; |
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| 149 | data.inferParams = ps; |
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[b69233ac] | 150 | } |
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| 151 | |
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[aaeacf4] | 152 | /// splices other InferUnion into this one. Will fail if one union is in `Slots` mode |
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[60aaa51d] | 153 | /// and the other is in `Params`. |
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| 154 | void splice( InferUnion && o ) { |
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[07d867b] | 155 | if (o.data.resnSlots) { |
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| 156 | if (data.resnSlots) { |
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| 157 | data.resnSlots->insert( |
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| 158 | data.resnSlots->end(), o.data.resnSlots->begin(), o.data.resnSlots->end() ); |
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| 159 | delete o.data.resnSlots; |
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| 160 | } |
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| 161 | else { |
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| 162 | data.resnSlots = o.data.resnSlots; |
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[60aaa51d] | 163 | } |
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[07d867b] | 164 | o.data.resnSlots = nullptr; |
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| 165 | } |
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| 166 | |
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| 167 | if (o.data.inferParams) { |
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| 168 | if (data.inferParams) { |
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| 169 | for ( const auto & p : *o.data.inferParams ) { |
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| 170 | (*data.inferParams)[p.first] = std::move(p.second); |
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| 171 | } |
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| 172 | delete o.data.inferParams; |
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| 173 | } |
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| 174 | else { |
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| 175 | data.inferParams = o.data.inferParams; |
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| 176 | } |
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| 177 | o.data.inferParams = nullptr; |
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| 178 | } |
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[60aaa51d] | 179 | } |
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[79f7875] | 180 | }; |
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| 181 | |
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| 182 | ptr<Type> result; |
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| 183 | ptr<TypeSubstitution> env; |
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| 184 | InferUnion inferred; |
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| 185 | bool extension = false; |
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| 186 | |
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[54e41b3] | 187 | Expr( const CodeLocation & loc, const Type * res = nullptr ) |
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| 188 | : ParseNode( loc ), result( res ), env(), inferred() {} |
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[79f7875] | 189 | |
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[9e1d485] | 190 | Expr * set_extension( bool ex ) { extension = ex; return this; } |
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[cf32116] | 191 | virtual bool get_lvalue() const; |
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[79f7875] | 192 | |
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[69bafd2] | 193 | virtual const Expr * accept( Visitor & v ) const override = 0; |
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[79f7875] | 194 | private: |
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[23f99e1] | 195 | Expr * clone() const override = 0; |
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[f3cc5b6] | 196 | MUTATE_FRIEND |
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[264e691] | 197 | }; |
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| 198 | |
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[87701b6] | 199 | /// The application of a function to a set of parameters. |
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[54e41b3] | 200 | /// Post-resolver form of `UntypedExpr` |
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| 201 | class ApplicationExpr final : public Expr { |
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| 202 | public: |
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| 203 | ptr<Expr> func; |
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| 204 | std::vector<ptr<Expr>> args; |
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| 205 | |
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| 206 | ApplicationExpr( const CodeLocation & loc, const Expr * f, std::vector<ptr<Expr>> && as = {} ); |
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| 207 | |
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[cf32116] | 208 | bool get_lvalue() const final; |
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| 209 | |
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[54e41b3] | 210 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 211 | private: |
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| 212 | ApplicationExpr * clone() const override { return new ApplicationExpr{ *this }; } |
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[f3cc5b6] | 213 | MUTATE_FRIEND |
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[54e41b3] | 214 | }; |
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| 215 | |
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| 216 | /// The application of a function to a set of parameters, pre-overload resolution. |
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| 217 | class UntypedExpr final : public Expr { |
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| 218 | public: |
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| 219 | ptr<Expr> func; |
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| 220 | std::vector<ptr<Expr>> args; |
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| 221 | |
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| 222 | UntypedExpr( const CodeLocation & loc, const Expr * f, std::vector<ptr<Expr>> && as = {} ) |
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| 223 | : Expr( loc ), func( f ), args( std::move(as) ) {} |
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| 224 | |
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[cf32116] | 225 | bool get_lvalue() const final; |
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| 226 | |
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[54e41b3] | 227 | /// Creates a new dereference expression |
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[490fb92e] | 228 | static UntypedExpr * createDeref( const CodeLocation & loc, const Expr * arg ); |
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[54e41b3] | 229 | /// Creates a new assignment expression |
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[490fb92e] | 230 | static UntypedExpr * createAssign( const CodeLocation & loc, const Expr * lhs, const Expr * rhs ); |
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[54e41b3] | 231 | |
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| 232 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 233 | private: |
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| 234 | UntypedExpr * clone() const override { return new UntypedExpr{ *this }; } |
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[f3cc5b6] | 235 | MUTATE_FRIEND |
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[54e41b3] | 236 | }; |
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| 237 | |
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| 238 | /// A name whose name is as-yet undetermined. |
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| 239 | /// May also be used to avoid name mangling in codegen phase. |
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| 240 | class NameExpr final : public Expr { |
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| 241 | public: |
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| 242 | std::string name; |
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| 243 | |
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| 244 | NameExpr( const CodeLocation & loc, const std::string & n ) : Expr( loc ), name( n ) {} |
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| 245 | |
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| 246 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 247 | private: |
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| 248 | NameExpr * clone() const override { return new NameExpr{ *this }; } |
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[f3cc5b6] | 249 | MUTATE_FRIEND |
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[54e41b3] | 250 | }; |
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| 251 | |
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[d5631b3] | 252 | /// A reference to a named variable. |
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| 253 | class VariableExpr final : public Expr { |
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| 254 | public: |
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| 255 | readonly<DeclWithType> var; |
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| 256 | |
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| 257 | VariableExpr( const CodeLocation & loc ); |
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| 258 | VariableExpr( const CodeLocation & loc, const DeclWithType * v ); |
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| 259 | |
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| 260 | bool get_lvalue() const final; |
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| 261 | |
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| 262 | /// generates a function pointer for a given function |
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| 263 | static VariableExpr * functionPointer( const CodeLocation & loc, const FunctionDecl * decl ); |
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| 264 | |
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| 265 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 266 | private: |
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| 267 | VariableExpr * clone() const override { return new VariableExpr{ *this }; } |
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| 268 | MUTATE_FRIEND |
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| 269 | }; |
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| 270 | |
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[54e41b3] | 271 | /// Address-of expression `&e` |
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| 272 | class AddressExpr final : public Expr { |
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| 273 | public: |
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| 274 | ptr<Expr> arg; |
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| 275 | |
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| 276 | AddressExpr( const CodeLocation & loc, const Expr * a ); |
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| 277 | |
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[b8524ca] | 278 | /// Generate AddressExpr wrapping given expression at same location |
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| 279 | AddressExpr( const Expr * a ) : AddressExpr( a->location, a ) {} |
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| 280 | |
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[54e41b3] | 281 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 282 | private: |
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| 283 | AddressExpr * clone() const override { return new AddressExpr{ *this }; } |
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[f3cc5b6] | 284 | MUTATE_FRIEND |
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[54e41b3] | 285 | }; |
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| 286 | |
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| 287 | /// GCC &&label |
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| 288 | /// https://gcc.gnu.org/onlinedocs/gcc-3.4.2/gcc/Labels-as-Values.html |
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| 289 | class LabelAddressExpr final : public Expr { |
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| 290 | public: |
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| 291 | Label arg; |
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| 292 | |
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| 293 | LabelAddressExpr( const CodeLocation & loc, Label && a ); |
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| 294 | |
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| 295 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 296 | private: |
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| 297 | LabelAddressExpr * clone() const override { return new LabelAddressExpr{ *this }; } |
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[f3cc5b6] | 298 | MUTATE_FRIEND |
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[54e41b3] | 299 | }; |
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| 300 | |
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| 301 | /// Whether a cast existed in the program source or not |
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| 302 | enum GeneratedFlag { ExplicitCast, GeneratedCast }; |
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| 303 | |
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| 304 | /// A type cast, e.g. `(int)e` |
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| 305 | class CastExpr final : public Expr { |
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| 306 | public: |
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| 307 | ptr<Expr> arg; |
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| 308 | GeneratedFlag isGenerated; |
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| 309 | |
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[87701b6] | 310 | CastExpr( const CodeLocation & loc, const Expr * a, const Type * to, |
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[54e41b3] | 311 | GeneratedFlag g = GeneratedCast ) : Expr( loc, to ), arg( a ), isGenerated( g ) {} |
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| 312 | /// Cast-to-void |
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| 313 | CastExpr( const CodeLocation & loc, const Expr * a, GeneratedFlag g = GeneratedCast ); |
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| 314 | |
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[b8524ca] | 315 | /// Wrap a cast expression around an existing expression (always generated) |
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| 316 | CastExpr( const Expr * a, const Type * to ) : CastExpr( a->location, a, to, GeneratedCast ) {} |
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| 317 | |
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| 318 | /// Wrap a cast-to-void expression around an existing expression (always generated) |
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| 319 | CastExpr( const Expr * a ) : CastExpr( a->location, a, GeneratedCast ) {} |
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| 320 | |
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[cf32116] | 321 | bool get_lvalue() const final; |
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| 322 | |
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[54e41b3] | 323 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 324 | private: |
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| 325 | CastExpr * clone() const override { return new CastExpr{ *this }; } |
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[f3cc5b6] | 326 | MUTATE_FRIEND |
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[54e41b3] | 327 | }; |
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| 328 | |
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| 329 | /// A cast to "keyword types", e.g. `(thread &)t` |
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| 330 | class KeywordCastExpr final : public Expr { |
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| 331 | public: |
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| 332 | ptr<Expr> arg; |
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[4ef08f7] | 333 | struct Concrete { |
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| 334 | std::string field; |
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| 335 | std::string getter; |
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| 336 | |
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| 337 | Concrete() = default; |
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| 338 | Concrete(const Concrete &) = default; |
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| 339 | }; |
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[312029a] | 340 | ast::AggregateDecl::Aggregate target; |
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[4ef08f7] | 341 | Concrete concrete_target; |
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| 342 | |
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[54e41b3] | 343 | |
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[312029a] | 344 | KeywordCastExpr( const CodeLocation & loc, const Expr * a, ast::AggregateDecl::Aggregate t ) |
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[54e41b3] | 345 | : Expr( loc ), arg( a ), target( t ) {} |
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| 346 | |
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[4ef08f7] | 347 | KeywordCastExpr( const CodeLocation & loc, const Expr * a, ast::AggregateDecl::Aggregate t, const Concrete & ct ) |
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| 348 | : Expr( loc ), arg( a ), target( t ), concrete_target( ct ) {} |
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| 349 | |
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[54e41b3] | 350 | /// Get a name for the target type |
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[312029a] | 351 | const char * targetString() const; |
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[54e41b3] | 352 | |
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| 353 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 354 | private: |
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| 355 | KeywordCastExpr * clone() const override { return new KeywordCastExpr{ *this }; } |
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[f3cc5b6] | 356 | MUTATE_FRIEND |
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[54e41b3] | 357 | }; |
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| 358 | |
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| 359 | /// A virtual dynamic cast, e.g. `(virtual exception)e` |
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| 360 | class VirtualCastExpr final : public Expr { |
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| 361 | public: |
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| 362 | ptr<Expr> arg; |
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| 363 | |
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| 364 | VirtualCastExpr( const CodeLocation & loc, const Expr * a, const Type * to ) |
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| 365 | : Expr( loc, to ), arg( a ) {} |
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| 366 | |
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| 367 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 368 | private: |
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| 369 | VirtualCastExpr * clone() const override { return new VirtualCastExpr{ *this }; } |
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[f3cc5b6] | 370 | MUTATE_FRIEND |
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[54e41b3] | 371 | }; |
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| 372 | |
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| 373 | /// A member selection operation before expression resolution, e.g. `q.p` |
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| 374 | class UntypedMemberExpr final : public Expr { |
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| 375 | public: |
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| 376 | ptr<Expr> member; |
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| 377 | ptr<Expr> aggregate; |
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| 378 | |
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| 379 | UntypedMemberExpr( const CodeLocation & loc, const Expr * mem, const Expr * agg ) |
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| 380 | : Expr( loc ), member( mem ), aggregate( agg ) { assert( aggregate ); } |
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| 381 | |
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[cf32116] | 382 | bool get_lvalue() const final; |
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| 383 | |
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[54e41b3] | 384 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 385 | private: |
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| 386 | UntypedMemberExpr * clone() const override { return new UntypedMemberExpr{ *this }; } |
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[f3cc5b6] | 387 | MUTATE_FRIEND |
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[54e41b3] | 388 | }; |
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| 389 | |
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| 390 | /// A member selection operation after expression resolution, e.g. `q.p` |
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| 391 | class MemberExpr final : public Expr { |
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| 392 | public: |
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| 393 | readonly<DeclWithType> member; |
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| 394 | ptr<Expr> aggregate; |
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| 395 | |
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| 396 | MemberExpr( const CodeLocation & loc, const DeclWithType * mem, const Expr * agg ); |
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| 397 | |
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[cf32116] | 398 | bool get_lvalue() const final; |
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| 399 | |
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[54e41b3] | 400 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 401 | private: |
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| 402 | MemberExpr * clone() const override { return new MemberExpr{ *this }; } |
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[f3cc5b6] | 403 | MUTATE_FRIEND |
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[ae265b55] | 404 | |
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| 405 | // Custructor overload meant only for AST conversion |
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| 406 | enum NoOpConstruction { NoOpConstructionChosen }; |
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| 407 | MemberExpr( const CodeLocation & loc, const DeclWithType * mem, const Expr * agg, |
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| 408 | NoOpConstruction overloadSelector ); |
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| 409 | friend class ::ConverterOldToNew; |
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| 410 | friend class ::ConverterNewToOld; |
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[54e41b3] | 411 | }; |
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| 412 | |
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[c36298d] | 413 | /// A compile-time constant. |
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| 414 | /// Mostly carries C-source text from parse to code-gen, without interpretation. E.g. strings keep their outer quotes and never have backslashes interpreted. |
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| 415 | /// 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] | 416 | class ConstantExpr final : public Expr { |
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| 417 | public: |
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[c36298d] | 418 | // Representation of this constant, as it occurs in .cfa source and .cfa.cc result. |
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[54e41b3] | 419 | std::string rep; |
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| 420 | |
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[87701b6] | 421 | ConstantExpr( |
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[7870799] | 422 | const CodeLocation & loc, const Type * ty, const std::string & r, |
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[c36298d] | 423 | std::optional<unsigned long long> i ) |
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[490fb92e] | 424 | : Expr( loc, ty ), rep( r ), ival( i ), underlyer(ty) {} |
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[87701b6] | 425 | |
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[c36298d] | 426 | /// Gets the integer value of this constant, if one is appropriate to its type. |
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| 427 | /// Throws a SemanticError if the type is not appropriate for value-as-integer. |
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| 428 | /// Suffers an assertion failure the type is appropriate but no integer value was supplied to the constructor. |
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[54e41b3] | 429 | long long int intValue() const; |
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| 430 | |
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| 431 | /// generates a boolean constant of the given bool |
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| 432 | static ConstantExpr * from_bool( const CodeLocation & loc, bool b ); |
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| 433 | /// generates an integer constant of the given int |
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| 434 | static ConstantExpr * from_int( const CodeLocation & loc, int i ); |
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| 435 | /// generates an integer constant of the given unsigned long int |
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| 436 | static ConstantExpr * from_ulong( const CodeLocation & loc, unsigned long i ); |
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| 437 | /// generates a null pointer value for the given type. void * if omitted. |
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| 438 | static ConstantExpr * null( const CodeLocation & loc, const Type * ptrType = nullptr ); |
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| 439 | |
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| 440 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 441 | private: |
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| 442 | ConstantExpr * clone() const override { return new ConstantExpr{ *this }; } |
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[f3cc5b6] | 443 | MUTATE_FRIEND |
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[c36298d] | 444 | |
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| 445 | std::optional<unsigned long long> ival; |
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| 446 | |
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| 447 | // Intended only for legacy support of roundtripping the old AST. |
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| 448 | // Captures the very-locally inferred type, before the resolver modifies the type of this ConstantExpression. |
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| 449 | // In the old AST it's constExpr->constant.type |
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| 450 | ptr<Type> underlyer; |
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| 451 | friend class ::ConverterOldToNew; |
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| 452 | friend class ::ConverterNewToOld; |
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[54e41b3] | 453 | }; |
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| 454 | |
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| 455 | /// sizeof expression, e.g. `sizeof(int)`, `sizeof 3+4` |
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| 456 | class SizeofExpr final : public Expr { |
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| 457 | public: |
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| 458 | ptr<Expr> expr; |
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| 459 | ptr<Type> type; |
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| 460 | |
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| 461 | SizeofExpr( const CodeLocation & loc, const Expr * e ); |
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| 462 | SizeofExpr( const CodeLocation & loc, const Type * t ); |
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| 463 | // deliberately no disambiguating overload for nullptr_t |
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| 464 | |
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| 465 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 466 | private: |
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| 467 | SizeofExpr * clone() const override { return new SizeofExpr{ *this }; } |
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[f3cc5b6] | 468 | MUTATE_FRIEND |
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[54e41b3] | 469 | }; |
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| 470 | |
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| 471 | /// alignof expression, e.g. `alignof(int)`, `alignof 3+4` |
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| 472 | class AlignofExpr final : public Expr { |
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| 473 | public: |
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| 474 | ptr<Expr> expr; |
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| 475 | ptr<Type> type; |
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| 476 | |
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| 477 | AlignofExpr( const CodeLocation & loc, const Expr * e ); |
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| 478 | AlignofExpr( const CodeLocation & loc, const Type * t ); |
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| 479 | // deliberately no disambiguating overload for nullptr_t |
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| 480 | |
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| 481 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 482 | private: |
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| 483 | AlignofExpr * clone() const override { return new AlignofExpr{ *this }; } |
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[f3cc5b6] | 484 | MUTATE_FRIEND |
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[54e41b3] | 485 | }; |
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| 486 | |
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| 487 | /// offsetof expression before resolver determines field, e.g. `offsetof(MyStruct, myfield)` |
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| 488 | class UntypedOffsetofExpr final : public Expr { |
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| 489 | public: |
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| 490 | ptr<Type> type; |
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| 491 | std::string member; |
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| 492 | |
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| 493 | UntypedOffsetofExpr( const CodeLocation & loc, const Type * ty, const std::string & mem ) |
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| 494 | : Expr( loc ), type( ty ), member( mem ) {} |
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| 495 | |
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| 496 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 497 | private: |
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| 498 | UntypedOffsetofExpr * clone() const override { return new UntypedOffsetofExpr{ *this }; } |
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[f3cc5b6] | 499 | MUTATE_FRIEND |
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[54e41b3] | 500 | }; |
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| 501 | |
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| 502 | /// offsetof expression after resolver determines field, e.g. `offsetof(MyStruct, myfield)` |
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| 503 | class OffsetofExpr final : public Expr { |
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| 504 | public: |
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| 505 | ptr<Type> type; |
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| 506 | readonly<DeclWithType> member; |
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| 507 | |
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| 508 | OffsetofExpr( const CodeLocation & loc, const Type * ty, const DeclWithType * mem ); |
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| 509 | |
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| 510 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 511 | private: |
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| 512 | OffsetofExpr * clone() const override { return new OffsetofExpr{ *this }; } |
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[f3cc5b6] | 513 | MUTATE_FRIEND |
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[54e41b3] | 514 | }; |
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| 515 | |
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| 516 | /// a pack of field-offsets for a generic type |
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| 517 | class OffsetPackExpr final : public Expr { |
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| 518 | public: |
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| 519 | ptr<StructInstType> type; |
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| 520 | |
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| 521 | OffsetPackExpr( const CodeLocation & loc, const StructInstType * ty ); |
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| 522 | |
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| 523 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 524 | private: |
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| 525 | OffsetPackExpr * clone() const override { return new OffsetPackExpr{ *this }; } |
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[f3cc5b6] | 526 | MUTATE_FRIEND |
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[54e41b3] | 527 | }; |
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| 528 | |
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| 529 | /// Variants of short-circuiting logical expression |
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| 530 | enum LogicalFlag { OrExpr, AndExpr }; |
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| 531 | |
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| 532 | /// Short-circuiting boolean expression (`&&` or `||`) |
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| 533 | class LogicalExpr final : public Expr { |
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| 534 | public: |
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| 535 | ptr<Expr> arg1; |
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| 536 | ptr<Expr> arg2; |
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| 537 | LogicalFlag isAnd; |
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| 538 | |
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| 539 | LogicalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, LogicalFlag ia ); |
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| 540 | |
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| 541 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 542 | private: |
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| 543 | LogicalExpr * clone() const override { return new LogicalExpr{ *this }; } |
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[f3cc5b6] | 544 | MUTATE_FRIEND |
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[54e41b3] | 545 | }; |
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| 546 | |
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| 547 | /// Three-argument conditional e.g. `p ? a : b` |
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| 548 | class ConditionalExpr final : public Expr { |
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| 549 | public: |
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| 550 | ptr<Expr> arg1; |
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| 551 | ptr<Expr> arg2; |
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| 552 | ptr<Expr> arg3; |
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| 553 | |
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| 554 | ConditionalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, const Expr * a3 ) |
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| 555 | : Expr( loc ), arg1( a1 ), arg2( a2 ), arg3( a3 ) {} |
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| 556 | |
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| 557 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 558 | private: |
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| 559 | ConditionalExpr * clone() const override { return new ConditionalExpr{ *this }; } |
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[f3cc5b6] | 560 | MUTATE_FRIEND |
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[54e41b3] | 561 | }; |
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| 562 | |
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| 563 | /// Comma expression e.g. `( a , b )` |
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| 564 | class CommaExpr final : public Expr { |
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| 565 | public: |
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| 566 | ptr<Expr> arg1; |
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| 567 | ptr<Expr> arg2; |
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| 568 | |
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[87701b6] | 569 | CommaExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2 ) |
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[4e13e2a] | 570 | : Expr( loc ), arg1( a1 ), arg2( a2 ) { |
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| 571 | this->result = a2->result; |
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| 572 | } |
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[54e41b3] | 573 | |
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[cf32116] | 574 | bool get_lvalue() const final; |
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| 575 | |
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[54e41b3] | 576 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 577 | private: |
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| 578 | CommaExpr * clone() const override { return new CommaExpr{ *this }; } |
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[f3cc5b6] | 579 | MUTATE_FRIEND |
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[54e41b3] | 580 | }; |
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| 581 | |
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[264e691] | 582 | /// A type used as an expression (e.g. a type generator parameter) |
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| 583 | class TypeExpr final : public Expr { |
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| 584 | public: |
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| 585 | ptr<Type> type; |
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| 586 | |
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| 587 | TypeExpr( const CodeLocation & loc, const Type * t ) : Expr(loc), type(t) {} |
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| 588 | |
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[69bafd2] | 589 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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[264e691] | 590 | private: |
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| 591 | TypeExpr * clone() const override { return new TypeExpr{ *this }; } |
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[f3cc5b6] | 592 | MUTATE_FRIEND |
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[79f7875] | 593 | }; |
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| 594 | |
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[54e41b3] | 595 | /// A GCC "asm constraint operand" used in an asm statement, e.g. `[output] "=f" (result)`. |
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| 596 | /// https://gcc.gnu.org/onlinedocs/gcc-4.7.1/gcc/Machine-Constraints.html#Machine-Constraints |
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| 597 | class AsmExpr final : public Expr { |
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| 598 | public: |
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[665f432] | 599 | std::string inout; |
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[9b4f329] | 600 | ptr<Expr> constraint; |
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| 601 | ptr<Expr> operand; |
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| 602 | |
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[665f432] | 603 | AsmExpr( const CodeLocation & loc, const std::string & io, const Expr * con, const Expr * op ) |
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[9b4f329] | 604 | : Expr( loc ), inout( io ), constraint( con ), operand( op ) {} |
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| 605 | |
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| 606 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 607 | private: |
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| 608 | AsmExpr * clone() const override { return new AsmExpr{ *this }; } |
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| 609 | MUTATE_FRIEND |
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| 610 | }; |
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| 611 | |
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[17a0228a] | 612 | /// The application of a function to a set of parameters, along with a set of copy constructor |
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[9b4f329] | 613 | /// calls, one for each argument |
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| 614 | class ImplicitCopyCtorExpr final : public Expr { |
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| 615 | public: |
---|
| 616 | ptr<ApplicationExpr> callExpr; |
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| 617 | |
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| 618 | ImplicitCopyCtorExpr( const CodeLocation& loc, const ApplicationExpr * call ) |
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[490fb92e] | 619 | : Expr( loc, call->result ), callExpr(call) { assert( call ); assert(call->result); } |
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[9b4f329] | 620 | |
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| 621 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 622 | private: |
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| 623 | ImplicitCopyCtorExpr * clone() const override { return new ImplicitCopyCtorExpr{ *this }; } |
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| 624 | MUTATE_FRIEND |
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| 625 | }; |
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| 626 | |
---|
| 627 | /// Constructor in expression context, e.g. `int * x = alloc() { 42 };` |
---|
| 628 | class ConstructorExpr final : public Expr { |
---|
| 629 | public: |
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| 630 | ptr<Expr> callExpr; |
---|
| 631 | |
---|
| 632 | ConstructorExpr( const CodeLocation & loc, const Expr * call ); |
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| 633 | |
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| 634 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 635 | private: |
---|
| 636 | ConstructorExpr * clone() const override { return new ConstructorExpr{ *this }; } |
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| 637 | MUTATE_FRIEND |
---|
| 638 | }; |
---|
| 639 | |
---|
| 640 | /// A C99 compound literal, e.g. `(MyType){ a, b, c }` |
---|
| 641 | class CompoundLiteralExpr final : public Expr { |
---|
| 642 | public: |
---|
| 643 | ptr<Init> init; |
---|
| 644 | |
---|
| 645 | CompoundLiteralExpr( const CodeLocation & loc, const Type * t, const Init * i ); |
---|
| 646 | |
---|
[cf32116] | 647 | bool get_lvalue() const final; |
---|
| 648 | |
---|
[9b4f329] | 649 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 650 | private: |
---|
| 651 | CompoundLiteralExpr * clone() const override { return new CompoundLiteralExpr{ *this }; } |
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| 652 | MUTATE_FRIEND |
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| 653 | }; |
---|
| 654 | |
---|
| 655 | /// A range, e.g. `3 ... 5` or `1~10` |
---|
| 656 | class RangeExpr final : public Expr { |
---|
| 657 | public: |
---|
| 658 | ptr<Expr> low; |
---|
| 659 | ptr<Expr> high; |
---|
| 660 | |
---|
| 661 | RangeExpr( const CodeLocation & loc, const Expr * l, const Expr * h ) |
---|
| 662 | : Expr( loc ), low( l ), high( h ) {} |
---|
| 663 | |
---|
| 664 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 665 | private: |
---|
| 666 | RangeExpr * clone() const override { return new RangeExpr{ *this }; } |
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| 667 | MUTATE_FRIEND |
---|
| 668 | }; |
---|
| 669 | |
---|
| 670 | /// A tuple expression before resolution, e.g. `[a, b, c]` |
---|
| 671 | class UntypedTupleExpr final : public Expr { |
---|
| 672 | public: |
---|
| 673 | std::vector<ptr<Expr>> exprs; |
---|
| 674 | |
---|
| 675 | UntypedTupleExpr( const CodeLocation & loc, std::vector<ptr<Expr>> && xs ) |
---|
| 676 | : Expr( loc ), exprs( std::move(xs) ) {} |
---|
| 677 | |
---|
| 678 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 679 | private: |
---|
| 680 | UntypedTupleExpr * clone() const override { return new UntypedTupleExpr{ *this }; } |
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| 681 | MUTATE_FRIEND |
---|
| 682 | }; |
---|
| 683 | |
---|
| 684 | /// A tuple expression after resolution, e.g. `[a, b, c]` |
---|
| 685 | class TupleExpr final : public Expr { |
---|
| 686 | public: |
---|
| 687 | std::vector<ptr<Expr>> exprs; |
---|
| 688 | |
---|
| 689 | TupleExpr( const CodeLocation & loc, std::vector<ptr<Expr>> && xs ); |
---|
| 690 | |
---|
| 691 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 692 | private: |
---|
| 693 | TupleExpr * clone() const override { return new TupleExpr{ *this }; } |
---|
| 694 | MUTATE_FRIEND |
---|
| 695 | }; |
---|
| 696 | |
---|
| 697 | /// An element selection operation on a tuple value, e.g. `t.3` after analysis |
---|
| 698 | class TupleIndexExpr final : public Expr { |
---|
| 699 | public: |
---|
| 700 | ptr<Expr> tuple; |
---|
| 701 | unsigned index; |
---|
| 702 | |
---|
| 703 | TupleIndexExpr( const CodeLocation & loc, const Expr * t, unsigned i ); |
---|
| 704 | |
---|
[cf32116] | 705 | bool get_lvalue() const final; |
---|
| 706 | |
---|
[9b4f329] | 707 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 708 | private: |
---|
| 709 | TupleIndexExpr * clone() const override { return new TupleIndexExpr{ *this }; } |
---|
| 710 | MUTATE_FRIEND |
---|
| 711 | }; |
---|
| 712 | |
---|
[17a0228a] | 713 | /// A multiple- or mass-assignment operation, or a tuple ctor/dtor expression. |
---|
| 714 | /// multiple-assignment: both sides of the assignment have tuple type, |
---|
[9b4f329] | 715 | /// e.g. `[a, b, c] = [d, e, f];` |
---|
| 716 | /// mass-assignment: left-hand side has tuple type and right-hand side does not: |
---|
| 717 | /// e.g. `[a, b, c] = 42;` |
---|
| 718 | class TupleAssignExpr final : public Expr { |
---|
| 719 | public: |
---|
| 720 | ptr<StmtExpr> stmtExpr; |
---|
| 721 | |
---|
[17a0228a] | 722 | TupleAssignExpr( |
---|
| 723 | const CodeLocation & loc, std::vector<ptr<Expr>> && assigns, |
---|
[9b4f329] | 724 | std::vector<ptr<ObjectDecl>> && tempDecls ); |
---|
[17a0228a] | 725 | |
---|
[9b4f329] | 726 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
[20de6fb] | 727 | |
---|
| 728 | friend class ::ConverterOldToNew; |
---|
| 729 | |
---|
[9b4f329] | 730 | private: |
---|
| 731 | TupleAssignExpr * clone() const override { return new TupleAssignExpr{ *this }; } |
---|
[20de6fb] | 732 | TupleAssignExpr( const CodeLocation & loc, const Type * result, const StmtExpr * s ); |
---|
| 733 | |
---|
[9b4f329] | 734 | MUTATE_FRIEND |
---|
| 735 | }; |
---|
| 736 | |
---|
| 737 | /// A GCC "statement expression", e.g. `({ int x = 5; x })` |
---|
| 738 | class StmtExpr final : public Expr { |
---|
| 739 | public: |
---|
| 740 | ptr<CompoundStmt> stmts; |
---|
| 741 | std::vector<ptr<ObjectDecl>> returnDecls; ///< return variable(s) for statement expression |
---|
| 742 | std::vector<ptr<Expr>> dtors; ///< destructor(s) for return variable(s) |
---|
| 743 | |
---|
[490fb92e] | 744 | readonly<ExprStmt> resultExpr; |
---|
| 745 | |
---|
[9b4f329] | 746 | StmtExpr( const CodeLocation & loc, const CompoundStmt * ss ); |
---|
| 747 | |
---|
| 748 | /// Set the result type of this StmtExpr based on its body |
---|
| 749 | void computeResult(); |
---|
| 750 | |
---|
| 751 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 752 | private: |
---|
| 753 | StmtExpr * clone() const override { return new StmtExpr{ *this }; } |
---|
| 754 | MUTATE_FRIEND |
---|
| 755 | }; |
---|
| 756 | |
---|
| 757 | /// An expression which must only be evaluated once |
---|
| 758 | class UniqueExpr final : public Expr { |
---|
| 759 | static unsigned long long nextId; |
---|
| 760 | public: |
---|
| 761 | ptr<Expr> expr; |
---|
| 762 | ptr<ObjectDecl> object; |
---|
| 763 | ptr<VariableExpr> var; |
---|
| 764 | unsigned long long id; |
---|
| 765 | |
---|
[d76f32c] | 766 | UniqueExpr( const CodeLocation & loc, const Expr * e, unsigned long long i = -1ull ); |
---|
[9b4f329] | 767 | |
---|
| 768 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 769 | private: |
---|
| 770 | UniqueExpr * clone() const override { return new UniqueExpr{ *this }; } |
---|
| 771 | MUTATE_FRIEND |
---|
| 772 | }; |
---|
| 773 | |
---|
| 774 | /// One option for resolving an initializer expression |
---|
| 775 | struct InitAlternative { |
---|
| 776 | ptr<Type> type; |
---|
| 777 | ptr<Designation> designation; |
---|
| 778 | |
---|
| 779 | InitAlternative() = default; |
---|
| 780 | InitAlternative( const Type * ty, const Designation * des ) : type( ty ), designation( des ) {} |
---|
| 781 | }; |
---|
| 782 | |
---|
| 783 | /// Pre-resolution initializer expression |
---|
| 784 | class UntypedInitExpr final : public Expr { |
---|
| 785 | public: |
---|
| 786 | ptr<Expr> expr; |
---|
[60aaa51d] | 787 | std::deque<InitAlternative> initAlts; |
---|
[9b4f329] | 788 | |
---|
[60aaa51d] | 789 | UntypedInitExpr( const CodeLocation & loc, const Expr * e, std::deque<InitAlternative> && as ) |
---|
[9b4f329] | 790 | : Expr( loc ), expr( e ), initAlts( std::move(as) ) {} |
---|
| 791 | |
---|
| 792 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 793 | private: |
---|
| 794 | UntypedInitExpr * clone() const override { return new UntypedInitExpr{ *this }; } |
---|
| 795 | MUTATE_FRIEND |
---|
| 796 | }; |
---|
| 797 | |
---|
| 798 | /// Post-resolution initializer expression |
---|
| 799 | class InitExpr final : public Expr { |
---|
| 800 | public: |
---|
| 801 | ptr<Expr> expr; |
---|
| 802 | ptr<Designation> designation; |
---|
| 803 | |
---|
| 804 | InitExpr( const CodeLocation & loc, const Expr * e, const Designation * des ) |
---|
| 805 | : Expr( loc, e->result ), expr( e ), designation( des ) {} |
---|
| 806 | |
---|
| 807 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 808 | private: |
---|
| 809 | InitExpr * clone() const override { return new InitExpr{ *this }; } |
---|
| 810 | MUTATE_FRIEND |
---|
| 811 | }; |
---|
| 812 | |
---|
| 813 | /// Expression containing a deleted identifier. |
---|
| 814 | /// Internal to resolver. |
---|
| 815 | class DeletedExpr final : public Expr { |
---|
| 816 | public: |
---|
| 817 | ptr<Expr> expr; |
---|
[e67991f] | 818 | readonly<Decl> deleteStmt; |
---|
[9b4f329] | 819 | |
---|
[e67991f] | 820 | DeletedExpr( const CodeLocation & loc, const Expr * e, const Decl * del ) |
---|
[9b4f329] | 821 | : Expr( loc, e->result ), expr( e ), deleteStmt( del ) { assert( expr->result ); } |
---|
| 822 | |
---|
| 823 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 824 | private: |
---|
| 825 | DeletedExpr * clone() const override { return new DeletedExpr{ *this }; } |
---|
| 826 | MUTATE_FRIEND |
---|
| 827 | }; |
---|
| 828 | |
---|
| 829 | /// Use of a default argument. |
---|
| 830 | /// Internal to resolver. |
---|
| 831 | class DefaultArgExpr final : public Expr { |
---|
| 832 | public: |
---|
| 833 | ptr<Expr> expr; |
---|
| 834 | |
---|
| 835 | DefaultArgExpr( const CodeLocation & loc, const Expr * e ) |
---|
| 836 | : Expr( loc, e->result ), expr( e ) { assert( e->result ); } |
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| 837 | |
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| 838 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 839 | private: |
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| 840 | DefaultArgExpr * clone() const override { return new DefaultArgExpr{ *this }; } |
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| 841 | MUTATE_FRIEND |
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| 842 | }; |
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| 843 | |
---|
| 844 | /// C11 _Generic expression |
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| 845 | class GenericExpr final : public Expr { |
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| 846 | public: |
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| 847 | /// One arm of the _Generic expr |
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| 848 | struct Association { |
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| 849 | ptr<Type> type; |
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| 850 | ptr<Expr> expr; |
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| 851 | |
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| 852 | Association() = default; |
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| 853 | // default case |
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| 854 | Association( const Expr * e ) : type(), expr( e ) {} |
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| 855 | // non-default case |
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| 856 | Association( const Type * t, const Expr * e ) : type( t ), expr( e ) {} |
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| 857 | }; |
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| 858 | |
---|
| 859 | ptr<Expr> control; |
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| 860 | std::vector<Association> associations; |
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| 861 | |
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| 862 | GenericExpr( const CodeLocation & loc, const Expr * ctrl, std::vector<Association> && assns ) |
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| 863 | : Expr( loc ), control( ctrl ), associations( std::move(assns) ) {} |
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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 | GenericExpr * clone() const override { return new GenericExpr{ *this }; } |
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| 868 | MUTATE_FRIEND |
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[54e41b3] | 869 | }; |
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[6d51bd7] | 870 | |
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[246c245] | 871 | |
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[79f7875] | 872 | } |
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| 873 | |
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[f3cc5b6] | 874 | #undef MUTATE_FRIEND |
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| 875 | |
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[79f7875] | 876 | // Local Variables: // |
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| 877 | // tab-width: 4 // |
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| 878 | // mode: c++ // |
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| 879 | // compile-command: "make install" // |
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| 880 | // End: // |
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