[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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[b3a0df6] | 114 | bool hasParams() const { return data.inferParams; } |
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[79f7875] | 115 | |
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| 116 | ResnSlots& resnSlots() { |
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[07d867b] | 117 | if (!data.resnSlots) { |
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| 118 | data.resnSlots = new ResnSlots(); |
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[79f7875] | 119 | } |
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[07d867b] | 120 | return *data.resnSlots; |
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[19e567dd] | 121 | } |
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| 122 | |
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[60aaa51d] | 123 | const ResnSlots& resnSlots() const { |
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[07d867b] | 124 | if (data.resnSlots) { |
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| 125 | return *data.resnSlots; |
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[19e567dd] | 126 | } |
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[7870799] | 127 | assertf(false, "Mode was not already resnSlots"); |
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| 128 | abort(); |
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[79f7875] | 129 | } |
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| 130 | |
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| 131 | InferredParams& inferParams() { |
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[07d867b] | 132 | if (!data.inferParams) { |
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| 133 | data.inferParams = new InferredParams(); |
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[79f7875] | 134 | } |
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[07d867b] | 135 | return *data.inferParams; |
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[19e567dd] | 136 | } |
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| 137 | |
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[60aaa51d] | 138 | const InferredParams& inferParams() const { |
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[07d867b] | 139 | if (data.inferParams) { |
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| 140 | return *data.inferParams; |
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[19e567dd] | 141 | } |
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[7870799] | 142 | assertf(false, "Mode was not already Params"); |
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| 143 | abort(); |
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[79f7875] | 144 | } |
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[60aaa51d] | 145 | |
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[07d867b] | 146 | void set_inferParams( InferredParams * ps ) { |
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| 147 | delete data.resnSlots; |
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| 148 | data.resnSlots = nullptr; |
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| 149 | delete data.inferParams; |
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| 150 | data.inferParams = ps; |
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[b69233ac] | 151 | } |
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| 152 | |
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[aaeacf4] | 153 | /// splices other InferUnion into this one. Will fail if one union is in `Slots` mode |
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[60aaa51d] | 154 | /// and the other is in `Params`. |
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| 155 | void splice( InferUnion && o ) { |
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[07d867b] | 156 | if (o.data.resnSlots) { |
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| 157 | if (data.resnSlots) { |
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| 158 | data.resnSlots->insert( |
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| 159 | data.resnSlots->end(), o.data.resnSlots->begin(), o.data.resnSlots->end() ); |
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| 160 | delete o.data.resnSlots; |
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| 161 | } |
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| 162 | else { |
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| 163 | data.resnSlots = o.data.resnSlots; |
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[60aaa51d] | 164 | } |
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[07d867b] | 165 | o.data.resnSlots = nullptr; |
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| 166 | } |
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| 167 | |
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| 168 | if (o.data.inferParams) { |
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| 169 | if (data.inferParams) { |
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| 170 | for ( const auto & p : *o.data.inferParams ) { |
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| 171 | (*data.inferParams)[p.first] = std::move(p.second); |
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| 172 | } |
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| 173 | delete o.data.inferParams; |
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| 174 | } |
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| 175 | else { |
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| 176 | data.inferParams = o.data.inferParams; |
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| 177 | } |
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| 178 | o.data.inferParams = nullptr; |
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| 179 | } |
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[60aaa51d] | 180 | } |
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[79f7875] | 181 | }; |
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| 182 | |
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| 183 | ptr<Type> result; |
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| 184 | ptr<TypeSubstitution> env; |
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| 185 | InferUnion inferred; |
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| 186 | bool extension = false; |
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| 187 | |
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[54e41b3] | 188 | Expr( const CodeLocation & loc, const Type * res = nullptr ) |
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| 189 | : ParseNode( loc ), result( res ), env(), inferred() {} |
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[79f7875] | 190 | |
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[9e1d485] | 191 | Expr * set_extension( bool ex ) { extension = ex; return this; } |
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[cf32116] | 192 | virtual bool get_lvalue() const; |
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[79f7875] | 193 | |
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[69bafd2] | 194 | virtual const Expr * accept( Visitor & v ) const override = 0; |
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[79f7875] | 195 | private: |
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[23f99e1] | 196 | Expr * clone() const override = 0; |
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[f3cc5b6] | 197 | MUTATE_FRIEND |
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[264e691] | 198 | }; |
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| 199 | |
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[87701b6] | 200 | /// The application of a function to a set of parameters. |
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[54e41b3] | 201 | /// Post-resolver form of `UntypedExpr` |
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| 202 | class ApplicationExpr final : public Expr { |
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| 203 | public: |
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| 204 | ptr<Expr> func; |
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| 205 | std::vector<ptr<Expr>> args; |
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| 206 | |
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| 207 | ApplicationExpr( const CodeLocation & loc, const Expr * f, std::vector<ptr<Expr>> && as = {} ); |
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| 208 | |
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[cf32116] | 209 | bool get_lvalue() const final; |
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| 210 | |
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[54e41b3] | 211 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 212 | private: |
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| 213 | ApplicationExpr * clone() const override { return new ApplicationExpr{ *this }; } |
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[f3cc5b6] | 214 | MUTATE_FRIEND |
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[54e41b3] | 215 | }; |
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| 216 | |
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| 217 | /// The application of a function to a set of parameters, pre-overload resolution. |
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| 218 | class UntypedExpr final : public Expr { |
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| 219 | public: |
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| 220 | ptr<Expr> func; |
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| 221 | std::vector<ptr<Expr>> args; |
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| 222 | |
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| 223 | UntypedExpr( const CodeLocation & loc, const Expr * f, std::vector<ptr<Expr>> && as = {} ) |
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| 224 | : Expr( loc ), func( f ), args( std::move(as) ) {} |
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| 225 | |
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[cf32116] | 226 | bool get_lvalue() const final; |
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| 227 | |
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[54e41b3] | 228 | /// Creates a new dereference expression |
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[490fb92e] | 229 | static UntypedExpr * createDeref( const CodeLocation & loc, const Expr * arg ); |
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[54e41b3] | 230 | /// Creates a new assignment expression |
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[490fb92e] | 231 | static UntypedExpr * createAssign( const CodeLocation & loc, const Expr * lhs, const Expr * rhs ); |
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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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[d5631b3] | 253 | /// A reference to a named variable. |
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| 254 | class VariableExpr final : public Expr { |
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| 255 | public: |
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| 256 | readonly<DeclWithType> var; |
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| 257 | |
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| 258 | VariableExpr( const CodeLocation & loc ); |
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| 259 | VariableExpr( const CodeLocation & loc, const DeclWithType * v ); |
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| 260 | |
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| 261 | bool get_lvalue() const final; |
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| 262 | |
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| 263 | /// generates a function pointer for a given function |
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| 264 | static VariableExpr * functionPointer( const CodeLocation & loc, const FunctionDecl * decl ); |
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| 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 | VariableExpr * clone() const override { return new VariableExpr{ *this }; } |
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| 269 | MUTATE_FRIEND |
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| 270 | }; |
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| 271 | |
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[54e41b3] | 272 | /// Address-of expression `&e` |
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| 273 | class AddressExpr final : public Expr { |
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| 274 | public: |
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| 275 | ptr<Expr> arg; |
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| 276 | |
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| 277 | AddressExpr( const CodeLocation & loc, const Expr * a ); |
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| 278 | |
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[b8524ca] | 279 | /// Generate AddressExpr wrapping given expression at same location |
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| 280 | AddressExpr( const Expr * a ) : AddressExpr( a->location, a ) {} |
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| 281 | |
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[54e41b3] | 282 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 283 | private: |
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| 284 | AddressExpr * clone() const override { return new AddressExpr{ *this }; } |
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[f3cc5b6] | 285 | MUTATE_FRIEND |
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[54e41b3] | 286 | }; |
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| 287 | |
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| 288 | /// GCC &&label |
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| 289 | /// https://gcc.gnu.org/onlinedocs/gcc-3.4.2/gcc/Labels-as-Values.html |
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| 290 | class LabelAddressExpr final : public Expr { |
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| 291 | public: |
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| 292 | Label arg; |
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| 293 | |
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| 294 | LabelAddressExpr( const CodeLocation & loc, Label && a ); |
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| 295 | |
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| 296 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 297 | private: |
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| 298 | LabelAddressExpr * clone() const override { return new LabelAddressExpr{ *this }; } |
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[f3cc5b6] | 299 | MUTATE_FRIEND |
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[54e41b3] | 300 | }; |
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| 301 | |
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[bb87dd0] | 302 | /// Inidicates whether the cast is introduced by the CFA type system. |
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| 303 | /// GeneratedCast for casts that the resolver introduces to force a return type |
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| 304 | /// ExplicitCast for casts from user code |
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| 305 | /// ExplicitCast for casts from desugaring advanced CFA features into simpler CFA |
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| 306 | /// example |
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| 307 | /// int * p; // declaration |
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| 308 | /// (float *) p; // use, with subject cast |
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| 309 | /// subject cast being GeneratedCast means we are considering an interpretation with a type mismatch |
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| 310 | /// subject cast being ExplicitCast means someone in charge wants it that way |
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[54e41b3] | 311 | enum GeneratedFlag { ExplicitCast, GeneratedCast }; |
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| 312 | |
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| 313 | /// A type cast, e.g. `(int)e` |
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| 314 | class CastExpr final : public Expr { |
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| 315 | public: |
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| 316 | ptr<Expr> arg; |
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| 317 | GeneratedFlag isGenerated; |
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| 318 | |
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[87701b6] | 319 | CastExpr( const CodeLocation & loc, const Expr * a, const Type * to, |
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[54e41b3] | 320 | GeneratedFlag g = GeneratedCast ) : Expr( loc, to ), arg( a ), isGenerated( g ) {} |
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| 321 | /// Cast-to-void |
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| 322 | CastExpr( const CodeLocation & loc, const Expr * a, GeneratedFlag g = GeneratedCast ); |
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| 323 | |
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[b8524ca] | 324 | /// Wrap a cast expression around an existing expression (always generated) |
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| 325 | CastExpr( const Expr * a, const Type * to ) : CastExpr( a->location, a, to, GeneratedCast ) {} |
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| 326 | |
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| 327 | /// Wrap a cast-to-void expression around an existing expression (always generated) |
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| 328 | CastExpr( const Expr * a ) : CastExpr( a->location, a, GeneratedCast ) {} |
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| 329 | |
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[cf32116] | 330 | bool get_lvalue() const final; |
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| 331 | |
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[54e41b3] | 332 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 333 | private: |
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| 334 | CastExpr * clone() const override { return new CastExpr{ *this }; } |
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[f3cc5b6] | 335 | MUTATE_FRIEND |
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[54e41b3] | 336 | }; |
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| 337 | |
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| 338 | /// A cast to "keyword types", e.g. `(thread &)t` |
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| 339 | class KeywordCastExpr final : public Expr { |
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| 340 | public: |
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| 341 | ptr<Expr> arg; |
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[4ef08f7] | 342 | struct Concrete { |
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| 343 | std::string field; |
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| 344 | std::string getter; |
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| 345 | |
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| 346 | Concrete() = default; |
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| 347 | Concrete(const Concrete &) = default; |
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| 348 | }; |
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[312029a] | 349 | ast::AggregateDecl::Aggregate target; |
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[4ef08f7] | 350 | Concrete concrete_target; |
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| 351 | |
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[54e41b3] | 352 | |
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[312029a] | 353 | KeywordCastExpr( const CodeLocation & loc, const Expr * a, ast::AggregateDecl::Aggregate t ) |
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[54e41b3] | 354 | : Expr( loc ), arg( a ), target( t ) {} |
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| 355 | |
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[4ef08f7] | 356 | KeywordCastExpr( const CodeLocation & loc, const Expr * a, ast::AggregateDecl::Aggregate t, const Concrete & ct ) |
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| 357 | : Expr( loc ), arg( a ), target( t ), concrete_target( ct ) {} |
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| 358 | |
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[54e41b3] | 359 | /// Get a name for the target type |
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[312029a] | 360 | const char * targetString() const; |
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[54e41b3] | 361 | |
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| 362 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 363 | private: |
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| 364 | KeywordCastExpr * clone() const override { return new KeywordCastExpr{ *this }; } |
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[f3cc5b6] | 365 | MUTATE_FRIEND |
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[54e41b3] | 366 | }; |
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| 367 | |
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| 368 | /// A virtual dynamic cast, e.g. `(virtual exception)e` |
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| 369 | class VirtualCastExpr final : public Expr { |
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| 370 | public: |
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| 371 | ptr<Expr> arg; |
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| 372 | |
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| 373 | VirtualCastExpr( const CodeLocation & loc, const Expr * a, const Type * to ) |
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| 374 | : Expr( loc, to ), arg( a ) {} |
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| 375 | |
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| 376 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 377 | private: |
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| 378 | VirtualCastExpr * clone() const override { return new VirtualCastExpr{ *this }; } |
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[f3cc5b6] | 379 | MUTATE_FRIEND |
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[54e41b3] | 380 | }; |
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| 381 | |
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| 382 | /// A member selection operation before expression resolution, e.g. `q.p` |
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| 383 | class UntypedMemberExpr final : public Expr { |
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| 384 | public: |
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| 385 | ptr<Expr> member; |
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| 386 | ptr<Expr> aggregate; |
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| 387 | |
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| 388 | UntypedMemberExpr( const CodeLocation & loc, const Expr * mem, const Expr * agg ) |
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| 389 | : Expr( loc ), member( mem ), aggregate( agg ) { assert( aggregate ); } |
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| 390 | |
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[cf32116] | 391 | bool get_lvalue() const final; |
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| 392 | |
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[54e41b3] | 393 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 394 | private: |
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| 395 | UntypedMemberExpr * clone() const override { return new UntypedMemberExpr{ *this }; } |
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[f3cc5b6] | 396 | MUTATE_FRIEND |
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[54e41b3] | 397 | }; |
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| 398 | |
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| 399 | /// A member selection operation after expression resolution, e.g. `q.p` |
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| 400 | class MemberExpr final : public Expr { |
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| 401 | public: |
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| 402 | readonly<DeclWithType> member; |
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| 403 | ptr<Expr> aggregate; |
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| 404 | |
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| 405 | MemberExpr( const CodeLocation & loc, const DeclWithType * mem, const Expr * agg ); |
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| 406 | |
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[cf32116] | 407 | bool get_lvalue() const final; |
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| 408 | |
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[54e41b3] | 409 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 410 | private: |
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| 411 | MemberExpr * clone() const override { return new MemberExpr{ *this }; } |
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[f3cc5b6] | 412 | MUTATE_FRIEND |
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[ae265b55] | 413 | |
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| 414 | // Custructor overload meant only for AST conversion |
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| 415 | enum NoOpConstruction { NoOpConstructionChosen }; |
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| 416 | MemberExpr( const CodeLocation & loc, const DeclWithType * mem, const Expr * agg, |
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| 417 | NoOpConstruction overloadSelector ); |
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| 418 | friend class ::ConverterOldToNew; |
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| 419 | friend class ::ConverterNewToOld; |
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[54e41b3] | 420 | }; |
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| 421 | |
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[c36298d] | 422 | /// A compile-time constant. |
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| 423 | /// 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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| 424 | /// 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] | 425 | class ConstantExpr final : public Expr { |
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| 426 | public: |
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[c36298d] | 427 | // Representation of this constant, as it occurs in .cfa source and .cfa.cc result. |
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[54e41b3] | 428 | std::string rep; |
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| 429 | |
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[87701b6] | 430 | ConstantExpr( |
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[7870799] | 431 | const CodeLocation & loc, const Type * ty, const std::string & r, |
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[c36298d] | 432 | std::optional<unsigned long long> i ) |
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[490fb92e] | 433 | : Expr( loc, ty ), rep( r ), ival( i ), underlyer(ty) {} |
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[87701b6] | 434 | |
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[c36298d] | 435 | /// Gets the integer value of this constant, if one is appropriate to its type. |
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| 436 | /// Throws a SemanticError if the type is not appropriate for value-as-integer. |
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| 437 | /// Suffers an assertion failure the type is appropriate but no integer value was supplied to the constructor. |
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[54e41b3] | 438 | long long int intValue() const; |
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| 439 | |
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[b91bfde] | 440 | /// Generates a boolean constant of the given bool. |
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[54e41b3] | 441 | static ConstantExpr * from_bool( const CodeLocation & loc, bool b ); |
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[b91bfde] | 442 | /// Generates an integer constant of the given int. |
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[54e41b3] | 443 | static ConstantExpr * from_int( const CodeLocation & loc, int i ); |
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[b91bfde] | 444 | /// Generates an integer constant of the given unsigned long int. |
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[54e41b3] | 445 | static ConstantExpr * from_ulong( const CodeLocation & loc, unsigned long i ); |
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[b91bfde] | 446 | /// Generates a string constant from the given string (char type, unquoted string). |
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| 447 | static ConstantExpr * from_string( const CodeLocation & loc, const std::string & string ); |
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| 448 | /// Generates a null pointer value for the given type. void * if omitted. |
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[54e41b3] | 449 | static ConstantExpr * null( const CodeLocation & loc, const Type * ptrType = nullptr ); |
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| 450 | |
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| 451 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 452 | private: |
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| 453 | ConstantExpr * clone() const override { return new ConstantExpr{ *this }; } |
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[f3cc5b6] | 454 | MUTATE_FRIEND |
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[c36298d] | 455 | |
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| 456 | std::optional<unsigned long long> ival; |
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| 457 | |
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| 458 | // Intended only for legacy support of roundtripping the old AST. |
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| 459 | // Captures the very-locally inferred type, before the resolver modifies the type of this ConstantExpression. |
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| 460 | // In the old AST it's constExpr->constant.type |
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| 461 | ptr<Type> underlyer; |
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| 462 | friend class ::ConverterOldToNew; |
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| 463 | friend class ::ConverterNewToOld; |
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[54e41b3] | 464 | }; |
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| 465 | |
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| 466 | /// sizeof expression, e.g. `sizeof(int)`, `sizeof 3+4` |
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| 467 | class SizeofExpr final : public Expr { |
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| 468 | public: |
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| 469 | ptr<Expr> expr; |
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| 470 | ptr<Type> type; |
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| 471 | |
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| 472 | SizeofExpr( const CodeLocation & loc, const Expr * e ); |
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| 473 | SizeofExpr( const CodeLocation & loc, const Type * t ); |
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| 474 | // deliberately no disambiguating overload for nullptr_t |
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| 475 | |
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| 476 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 477 | private: |
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| 478 | SizeofExpr * clone() const override { return new SizeofExpr{ *this }; } |
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[f3cc5b6] | 479 | MUTATE_FRIEND |
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[54e41b3] | 480 | }; |
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| 481 | |
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| 482 | /// alignof expression, e.g. `alignof(int)`, `alignof 3+4` |
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| 483 | class AlignofExpr final : public Expr { |
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| 484 | public: |
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| 485 | ptr<Expr> expr; |
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| 486 | ptr<Type> type; |
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| 487 | |
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| 488 | AlignofExpr( const CodeLocation & loc, const Expr * e ); |
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| 489 | AlignofExpr( const CodeLocation & loc, const Type * t ); |
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| 490 | // deliberately no disambiguating overload for nullptr_t |
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| 491 | |
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| 492 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 493 | private: |
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| 494 | AlignofExpr * clone() const override { return new AlignofExpr{ *this }; } |
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[f3cc5b6] | 495 | MUTATE_FRIEND |
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[54e41b3] | 496 | }; |
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| 497 | |
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| 498 | /// offsetof expression before resolver determines field, e.g. `offsetof(MyStruct, myfield)` |
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| 499 | class UntypedOffsetofExpr final : public Expr { |
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| 500 | public: |
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| 501 | ptr<Type> type; |
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| 502 | std::string member; |
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| 503 | |
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| 504 | UntypedOffsetofExpr( const CodeLocation & loc, const Type * ty, const std::string & mem ) |
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| 505 | : Expr( loc ), type( ty ), member( mem ) {} |
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| 506 | |
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| 507 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 508 | private: |
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| 509 | UntypedOffsetofExpr * clone() const override { return new UntypedOffsetofExpr{ *this }; } |
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[f3cc5b6] | 510 | MUTATE_FRIEND |
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[54e41b3] | 511 | }; |
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| 512 | |
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| 513 | /// offsetof expression after resolver determines field, e.g. `offsetof(MyStruct, myfield)` |
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| 514 | class OffsetofExpr final : public Expr { |
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| 515 | public: |
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| 516 | ptr<Type> type; |
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| 517 | readonly<DeclWithType> member; |
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| 518 | |
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| 519 | OffsetofExpr( const CodeLocation & loc, const Type * ty, const DeclWithType * mem ); |
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| 520 | |
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| 521 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 522 | private: |
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| 523 | OffsetofExpr * clone() const override { return new OffsetofExpr{ *this }; } |
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[f3cc5b6] | 524 | MUTATE_FRIEND |
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[54e41b3] | 525 | }; |
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| 526 | |
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| 527 | /// a pack of field-offsets for a generic type |
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| 528 | class OffsetPackExpr final : public Expr { |
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| 529 | public: |
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| 530 | ptr<StructInstType> type; |
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| 531 | |
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| 532 | OffsetPackExpr( const CodeLocation & loc, const StructInstType * ty ); |
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| 533 | |
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| 534 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 535 | private: |
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| 536 | OffsetPackExpr * clone() const override { return new OffsetPackExpr{ *this }; } |
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[f3cc5b6] | 537 | MUTATE_FRIEND |
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[54e41b3] | 538 | }; |
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| 539 | |
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| 540 | /// Variants of short-circuiting logical expression |
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| 541 | enum LogicalFlag { OrExpr, AndExpr }; |
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| 542 | |
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| 543 | /// Short-circuiting boolean expression (`&&` or `||`) |
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| 544 | class LogicalExpr final : public Expr { |
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| 545 | public: |
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| 546 | ptr<Expr> arg1; |
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| 547 | ptr<Expr> arg2; |
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| 548 | LogicalFlag isAnd; |
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| 549 | |
---|
| 550 | LogicalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, LogicalFlag ia ); |
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| 551 | |
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| 552 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 553 | private: |
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| 554 | LogicalExpr * clone() const override { return new LogicalExpr{ *this }; } |
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[f3cc5b6] | 555 | MUTATE_FRIEND |
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[54e41b3] | 556 | }; |
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| 557 | |
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| 558 | /// Three-argument conditional e.g. `p ? a : b` |
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| 559 | class ConditionalExpr final : public Expr { |
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| 560 | public: |
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| 561 | ptr<Expr> arg1; |
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| 562 | ptr<Expr> arg2; |
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| 563 | ptr<Expr> arg3; |
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| 564 | |
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| 565 | ConditionalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, const Expr * a3 ) |
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| 566 | : Expr( loc ), arg1( a1 ), arg2( a2 ), arg3( a3 ) {} |
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| 567 | |
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| 568 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 569 | private: |
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| 570 | ConditionalExpr * clone() const override { return new ConditionalExpr{ *this }; } |
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[f3cc5b6] | 571 | MUTATE_FRIEND |
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[54e41b3] | 572 | }; |
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| 573 | |
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| 574 | /// Comma expression e.g. `( a , b )` |
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| 575 | class CommaExpr final : public Expr { |
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| 576 | public: |
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| 577 | ptr<Expr> arg1; |
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| 578 | ptr<Expr> arg2; |
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| 579 | |
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[87701b6] | 580 | CommaExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2 ) |
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[4e13e2a] | 581 | : Expr( loc ), arg1( a1 ), arg2( a2 ) { |
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| 582 | this->result = a2->result; |
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| 583 | } |
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[54e41b3] | 584 | |
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[cf32116] | 585 | bool get_lvalue() const final; |
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| 586 | |
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[54e41b3] | 587 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 588 | private: |
---|
| 589 | CommaExpr * clone() const override { return new CommaExpr{ *this }; } |
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[f3cc5b6] | 590 | MUTATE_FRIEND |
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[54e41b3] | 591 | }; |
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| 592 | |
---|
[264e691] | 593 | /// A type used as an expression (e.g. a type generator parameter) |
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| 594 | class TypeExpr final : public Expr { |
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| 595 | public: |
---|
| 596 | ptr<Type> type; |
---|
| 597 | |
---|
| 598 | TypeExpr( const CodeLocation & loc, const Type * t ) : Expr(loc), type(t) {} |
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| 599 | |
---|
[69bafd2] | 600 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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[264e691] | 601 | private: |
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| 602 | TypeExpr * clone() const override { return new TypeExpr{ *this }; } |
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[f3cc5b6] | 603 | MUTATE_FRIEND |
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[79f7875] | 604 | }; |
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| 605 | |
---|
[54e41b3] | 606 | /// A GCC "asm constraint operand" used in an asm statement, e.g. `[output] "=f" (result)`. |
---|
| 607 | /// https://gcc.gnu.org/onlinedocs/gcc-4.7.1/gcc/Machine-Constraints.html#Machine-Constraints |
---|
| 608 | class AsmExpr final : public Expr { |
---|
| 609 | public: |
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[665f432] | 610 | std::string inout; |
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[9b4f329] | 611 | ptr<Expr> constraint; |
---|
| 612 | ptr<Expr> operand; |
---|
| 613 | |
---|
[665f432] | 614 | AsmExpr( const CodeLocation & loc, const std::string & io, const Expr * con, const Expr * op ) |
---|
[9b4f329] | 615 | : Expr( loc ), inout( io ), constraint( con ), operand( op ) {} |
---|
| 616 | |
---|
| 617 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 618 | private: |
---|
| 619 | AsmExpr * clone() const override { return new AsmExpr{ *this }; } |
---|
| 620 | MUTATE_FRIEND |
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| 621 | }; |
---|
| 622 | |
---|
[17a0228a] | 623 | /// The application of a function to a set of parameters, along with a set of copy constructor |
---|
[9b4f329] | 624 | /// calls, one for each argument |
---|
| 625 | class ImplicitCopyCtorExpr final : public Expr { |
---|
| 626 | public: |
---|
| 627 | ptr<ApplicationExpr> callExpr; |
---|
| 628 | |
---|
| 629 | ImplicitCopyCtorExpr( const CodeLocation& loc, const ApplicationExpr * call ) |
---|
[490fb92e] | 630 | : Expr( loc, call->result ), callExpr(call) { assert( call ); assert(call->result); } |
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[9b4f329] | 631 | |
---|
| 632 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 633 | private: |
---|
| 634 | ImplicitCopyCtorExpr * clone() const override { return new ImplicitCopyCtorExpr{ *this }; } |
---|
| 635 | MUTATE_FRIEND |
---|
| 636 | }; |
---|
| 637 | |
---|
| 638 | /// Constructor in expression context, e.g. `int * x = alloc() { 42 };` |
---|
| 639 | class ConstructorExpr final : public Expr { |
---|
| 640 | public: |
---|
| 641 | ptr<Expr> callExpr; |
---|
| 642 | |
---|
| 643 | ConstructorExpr( const CodeLocation & loc, const Expr * call ); |
---|
| 644 | |
---|
| 645 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 646 | private: |
---|
| 647 | ConstructorExpr * clone() const override { return new ConstructorExpr{ *this }; } |
---|
| 648 | MUTATE_FRIEND |
---|
| 649 | }; |
---|
| 650 | |
---|
| 651 | /// A C99 compound literal, e.g. `(MyType){ a, b, c }` |
---|
| 652 | class CompoundLiteralExpr final : public Expr { |
---|
| 653 | public: |
---|
| 654 | ptr<Init> init; |
---|
| 655 | |
---|
| 656 | CompoundLiteralExpr( const CodeLocation & loc, const Type * t, const Init * i ); |
---|
| 657 | |
---|
[cf32116] | 658 | bool get_lvalue() const final; |
---|
| 659 | |
---|
[9b4f329] | 660 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 661 | private: |
---|
| 662 | CompoundLiteralExpr * clone() const override { return new CompoundLiteralExpr{ *this }; } |
---|
| 663 | MUTATE_FRIEND |
---|
| 664 | }; |
---|
| 665 | |
---|
| 666 | /// A range, e.g. `3 ... 5` or `1~10` |
---|
| 667 | class RangeExpr final : public Expr { |
---|
| 668 | public: |
---|
| 669 | ptr<Expr> low; |
---|
| 670 | ptr<Expr> high; |
---|
| 671 | |
---|
| 672 | RangeExpr( const CodeLocation & loc, const Expr * l, const Expr * h ) |
---|
| 673 | : Expr( loc ), low( l ), high( h ) {} |
---|
| 674 | |
---|
| 675 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 676 | private: |
---|
| 677 | RangeExpr * clone() const override { return new RangeExpr{ *this }; } |
---|
| 678 | MUTATE_FRIEND |
---|
| 679 | }; |
---|
| 680 | |
---|
| 681 | /// A tuple expression before resolution, e.g. `[a, b, c]` |
---|
| 682 | class UntypedTupleExpr final : public Expr { |
---|
| 683 | public: |
---|
| 684 | std::vector<ptr<Expr>> exprs; |
---|
| 685 | |
---|
| 686 | UntypedTupleExpr( const CodeLocation & loc, std::vector<ptr<Expr>> && xs ) |
---|
| 687 | : Expr( loc ), exprs( std::move(xs) ) {} |
---|
| 688 | |
---|
| 689 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 690 | private: |
---|
| 691 | UntypedTupleExpr * clone() const override { return new UntypedTupleExpr{ *this }; } |
---|
| 692 | MUTATE_FRIEND |
---|
| 693 | }; |
---|
| 694 | |
---|
| 695 | /// A tuple expression after resolution, e.g. `[a, b, c]` |
---|
| 696 | class TupleExpr final : public Expr { |
---|
| 697 | public: |
---|
| 698 | std::vector<ptr<Expr>> exprs; |
---|
| 699 | |
---|
| 700 | TupleExpr( const CodeLocation & loc, std::vector<ptr<Expr>> && xs ); |
---|
| 701 | |
---|
| 702 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 703 | private: |
---|
| 704 | TupleExpr * clone() const override { return new TupleExpr{ *this }; } |
---|
| 705 | MUTATE_FRIEND |
---|
| 706 | }; |
---|
| 707 | |
---|
| 708 | /// An element selection operation on a tuple value, e.g. `t.3` after analysis |
---|
| 709 | class TupleIndexExpr final : public Expr { |
---|
| 710 | public: |
---|
| 711 | ptr<Expr> tuple; |
---|
| 712 | unsigned index; |
---|
| 713 | |
---|
| 714 | TupleIndexExpr( const CodeLocation & loc, const Expr * t, unsigned i ); |
---|
| 715 | |
---|
[cf32116] | 716 | bool get_lvalue() const final; |
---|
| 717 | |
---|
[9b4f329] | 718 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 719 | private: |
---|
| 720 | TupleIndexExpr * clone() const override { return new TupleIndexExpr{ *this }; } |
---|
| 721 | MUTATE_FRIEND |
---|
| 722 | }; |
---|
| 723 | |
---|
[17a0228a] | 724 | /// A multiple- or mass-assignment operation, or a tuple ctor/dtor expression. |
---|
| 725 | /// multiple-assignment: both sides of the assignment have tuple type, |
---|
[9b4f329] | 726 | /// e.g. `[a, b, c] = [d, e, f];` |
---|
| 727 | /// mass-assignment: left-hand side has tuple type and right-hand side does not: |
---|
| 728 | /// e.g. `[a, b, c] = 42;` |
---|
| 729 | class TupleAssignExpr final : public Expr { |
---|
| 730 | public: |
---|
| 731 | ptr<StmtExpr> stmtExpr; |
---|
| 732 | |
---|
[17a0228a] | 733 | TupleAssignExpr( |
---|
| 734 | const CodeLocation & loc, std::vector<ptr<Expr>> && assigns, |
---|
[9b4f329] | 735 | std::vector<ptr<ObjectDecl>> && tempDecls ); |
---|
[17a0228a] | 736 | |
---|
[9b4f329] | 737 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
[20de6fb] | 738 | |
---|
| 739 | friend class ::ConverterOldToNew; |
---|
| 740 | |
---|
[9b4f329] | 741 | private: |
---|
| 742 | TupleAssignExpr * clone() const override { return new TupleAssignExpr{ *this }; } |
---|
[20de6fb] | 743 | TupleAssignExpr( const CodeLocation & loc, const Type * result, const StmtExpr * s ); |
---|
| 744 | |
---|
[9b4f329] | 745 | MUTATE_FRIEND |
---|
| 746 | }; |
---|
| 747 | |
---|
| 748 | /// A GCC "statement expression", e.g. `({ int x = 5; x })` |
---|
| 749 | class StmtExpr final : public Expr { |
---|
| 750 | public: |
---|
| 751 | ptr<CompoundStmt> stmts; |
---|
| 752 | std::vector<ptr<ObjectDecl>> returnDecls; ///< return variable(s) for statement expression |
---|
| 753 | std::vector<ptr<Expr>> dtors; ///< destructor(s) for return variable(s) |
---|
| 754 | |
---|
[490fb92e] | 755 | readonly<ExprStmt> resultExpr; |
---|
| 756 | |
---|
[9b4f329] | 757 | StmtExpr( const CodeLocation & loc, const CompoundStmt * ss ); |
---|
| 758 | |
---|
| 759 | /// Set the result type of this StmtExpr based on its body |
---|
| 760 | void computeResult(); |
---|
| 761 | |
---|
| 762 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 763 | private: |
---|
| 764 | StmtExpr * clone() const override { return new StmtExpr{ *this }; } |
---|
| 765 | MUTATE_FRIEND |
---|
| 766 | }; |
---|
| 767 | |
---|
| 768 | /// An expression which must only be evaluated once |
---|
[3249dd8b] | 769 | class UniqueExpr final : public Expr { |
---|
[9b4f329] | 770 | static unsigned long long nextId; |
---|
| 771 | public: |
---|
| 772 | ptr<Expr> expr; |
---|
| 773 | ptr<ObjectDecl> object; |
---|
| 774 | ptr<VariableExpr> var; |
---|
| 775 | unsigned long long id; |
---|
| 776 | |
---|
[d76f32c] | 777 | UniqueExpr( const CodeLocation & loc, const Expr * e, unsigned long long i = -1ull ); |
---|
[9b4f329] | 778 | |
---|
| 779 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 780 | private: |
---|
| 781 | UniqueExpr * clone() const override { return new UniqueExpr{ *this }; } |
---|
| 782 | MUTATE_FRIEND |
---|
| 783 | }; |
---|
| 784 | |
---|
| 785 | /// One option for resolving an initializer expression |
---|
| 786 | struct InitAlternative { |
---|
| 787 | ptr<Type> type; |
---|
| 788 | ptr<Designation> designation; |
---|
| 789 | |
---|
| 790 | InitAlternative() = default; |
---|
| 791 | InitAlternative( const Type * ty, const Designation * des ) : type( ty ), designation( des ) {} |
---|
| 792 | }; |
---|
| 793 | |
---|
| 794 | /// Pre-resolution initializer expression |
---|
| 795 | class UntypedInitExpr final : public Expr { |
---|
| 796 | public: |
---|
| 797 | ptr<Expr> expr; |
---|
[60aaa51d] | 798 | std::deque<InitAlternative> initAlts; |
---|
[9b4f329] | 799 | |
---|
[60aaa51d] | 800 | UntypedInitExpr( const CodeLocation & loc, const Expr * e, std::deque<InitAlternative> && as ) |
---|
[9b4f329] | 801 | : Expr( loc ), expr( e ), initAlts( std::move(as) ) {} |
---|
| 802 | |
---|
| 803 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 804 | private: |
---|
| 805 | UntypedInitExpr * clone() const override { return new UntypedInitExpr{ *this }; } |
---|
| 806 | MUTATE_FRIEND |
---|
| 807 | }; |
---|
| 808 | |
---|
| 809 | /// Post-resolution initializer expression |
---|
| 810 | class InitExpr final : public Expr { |
---|
| 811 | public: |
---|
| 812 | ptr<Expr> expr; |
---|
| 813 | ptr<Designation> designation; |
---|
| 814 | |
---|
| 815 | InitExpr( const CodeLocation & loc, const Expr * e, const Designation * des ) |
---|
| 816 | : Expr( loc, e->result ), expr( e ), designation( des ) {} |
---|
| 817 | |
---|
| 818 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
---|
| 819 | private: |
---|
| 820 | InitExpr * clone() const override { return new InitExpr{ *this }; } |
---|
| 821 | MUTATE_FRIEND |
---|
| 822 | }; |
---|
| 823 | |
---|
| 824 | /// Expression containing a deleted identifier. |
---|
| 825 | /// Internal to resolver. |
---|
| 826 | class DeletedExpr final : public Expr { |
---|
| 827 | public: |
---|
| 828 | ptr<Expr> expr; |
---|
[e67991f] | 829 | readonly<Decl> deleteStmt; |
---|
[9b4f329] | 830 | |
---|
[e67991f] | 831 | DeletedExpr( const CodeLocation & loc, const Expr * e, const Decl * del ) |
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[9b4f329] | 832 | : Expr( loc, e->result ), expr( e ), deleteStmt( del ) { assert( expr->result ); } |
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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 | DeletedExpr * clone() const override { return new DeletedExpr{ *this }; } |
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| 837 | MUTATE_FRIEND |
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| 838 | }; |
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| 839 | |
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| 840 | /// Use of a default argument. |
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| 841 | /// Internal to resolver. |
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| 842 | class DefaultArgExpr final : public Expr { |
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| 843 | public: |
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| 844 | ptr<Expr> expr; |
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| 845 | |
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| 846 | DefaultArgExpr( const CodeLocation & loc, const Expr * e ) |
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| 847 | : Expr( loc, e->result ), expr( e ) { assert( e->result ); } |
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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 | DefaultArgExpr * clone() const override { return new DefaultArgExpr{ *this }; } |
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| 852 | MUTATE_FRIEND |
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| 853 | }; |
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| 854 | |
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| 855 | /// C11 _Generic expression |
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| 856 | class GenericExpr final : public Expr { |
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| 857 | public: |
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| 858 | /// One arm of the _Generic expr |
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| 859 | struct Association { |
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| 860 | ptr<Type> type; |
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| 861 | ptr<Expr> expr; |
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| 862 | |
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| 863 | Association() = default; |
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| 864 | // default case |
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| 865 | Association( const Expr * e ) : type(), expr( e ) {} |
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| 866 | // non-default case |
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| 867 | Association( const Type * t, const Expr * e ) : type( t ), expr( e ) {} |
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| 868 | }; |
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| 869 | |
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| 870 | ptr<Expr> control; |
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| 871 | std::vector<Association> associations; |
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| 872 | |
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| 873 | GenericExpr( const CodeLocation & loc, const Expr * ctrl, std::vector<Association> && assns ) |
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| 874 | : Expr( loc ), control( ctrl ), associations( std::move(assns) ) {} |
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| 875 | |
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| 876 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 877 | private: |
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| 878 | GenericExpr * clone() const override { return new GenericExpr{ *this }; } |
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| 879 | MUTATE_FRIEND |
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[54e41b3] | 880 | }; |
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[6d51bd7] | 881 | |
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[246c245] | 882 | |
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[79f7875] | 883 | } |
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| 884 | |
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[f3cc5b6] | 885 | #undef MUTATE_FRIEND |
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| 886 | |
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[79f7875] | 887 | // Local Variables: // |
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| 888 | // tab-width: 4 // |
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| 889 | // mode: c++ // |
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| 890 | // compile-command: "make install" // |
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| 891 | // End: // |
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