[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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| 11 | // Last Modified By : Aaron B. Moss |
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| 12 | // Created On : Fri May 10 10:30:00 2019 |
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| 13 | // Update Count : 1 |
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| 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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| 19 | #include <map> |
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[54e41b3] | 20 | #include <string> |
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[79f7875] | 21 | #include <utility> // for move |
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| 22 | #include <vector> |
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| 23 | |
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| 24 | #include "Fwd.hpp" // for UniqueId |
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[54e41b3] | 25 | #include "Label.hpp" |
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[79f7875] | 26 | #include "ParseNode.hpp" |
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[264e691] | 27 | #include "Visitor.hpp" |
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[79f7875] | 28 | |
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[f3cc5b6] | 29 | // Must be included in *all* AST classes; should be #undef'd at the end of the file |
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| 30 | #define MUTATE_FRIEND template<typename node_t> friend auto mutate(const node_t * node); |
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| 31 | |
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[79f7875] | 32 | namespace ast { |
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| 33 | |
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[6d51bd7] | 34 | /// Contains the ID of a declaration and a type that is derived from that declaration, |
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[79f7875] | 35 | /// but subject to decay-to-pointer and type parameter renaming |
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| 36 | struct ParamEntry { |
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| 37 | UniqueId decl; |
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| 38 | ptr<Type> actualType; |
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| 39 | ptr<Type> formalType; |
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| 40 | ptr<Expr> expr; |
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| 41 | |
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| 42 | ParamEntry() : decl( 0 ), actualType( nullptr ), formalType( nullptr ), expr( nullptr ) {} |
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| 43 | ParamEntry( UniqueId id, Type* actual, Type* formal, Expr* e ) |
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| 44 | : decl( id ), actualType( actual ), formalType( formal ), expr( e ) {} |
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| 45 | }; |
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| 46 | |
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| 47 | /// Pre-resolution list of parameters to infer |
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| 48 | using ResnSlots = std::vector<UniqueId>; |
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| 49 | /// Post-resolution map of inferred parameters |
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| 50 | using InferredParams = std::map< UniqueId, ParamEntry >; |
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| 51 | |
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| 52 | /// Base node for expressions |
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| 53 | class Expr : public ParseNode { |
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| 54 | public: |
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| 55 | /// Saves space (~16 bytes) by combining ResnSlots and InferredParams |
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| 56 | struct InferUnion { |
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| 57 | enum { Empty, Slots, Params } mode; |
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| 58 | union data_t { |
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| 59 | char def; |
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| 60 | ResnSlots resnSlots; |
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| 61 | InferredParams inferParams; |
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| 62 | |
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| 63 | data_t() : def('\0') {} |
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| 64 | ~data_t() {} |
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| 65 | } data; |
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| 66 | |
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| 67 | /// initializes from other InferUnion |
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| 68 | void init_from( const InferUnion& o ) { |
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| 69 | switch ( o.mode ) { |
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| 70 | case Empty: return; |
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| 71 | case Slots: new(&data.resnSlots) ResnSlots{ o.data.resnSlots }; return; |
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| 72 | case Params: new(&data.inferParams) InferredParams{ o.data.inferParams }; return; |
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| 73 | } |
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| 74 | } |
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| 75 | |
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| 76 | /// initializes from other InferUnion (move semantics) |
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| 77 | void init_from( InferUnion&& o ) { |
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| 78 | switch ( o.mode ) { |
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| 79 | case Empty: return; |
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| 80 | case Slots: new(&data.resnSlots) ResnSlots{ std::move(o.data.resnSlots) }; return; |
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[6d51bd7] | 81 | case Params: |
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[79f7875] | 82 | new(&data.inferParams) InferredParams{ std::move(o.data.inferParams) }; return; |
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| 83 | } |
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| 84 | } |
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| 85 | |
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| 86 | /// clears variant fields |
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| 87 | void reset() { |
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| 88 | switch( mode ) { |
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| 89 | case Empty: return; |
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| 90 | case Slots: data.resnSlots.~ResnSlots(); return; |
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| 91 | case Params: data.inferParams.~InferredParams(); return; |
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| 92 | } |
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| 93 | } |
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| 94 | |
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| 95 | InferUnion() : mode(Empty), data() {} |
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| 96 | InferUnion( const InferUnion& o ) : mode( o.mode ), data() { init_from( o ); } |
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| 97 | InferUnion( InferUnion&& o ) : mode( o.mode ), data() { init_from( std::move(o) ); } |
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| 98 | InferUnion& operator= ( const InferUnion& ) = delete; |
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| 99 | InferUnion& operator= ( InferUnion&& ) = delete; |
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| 100 | ~InferUnion() { reset(); } |
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| 101 | |
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| 102 | ResnSlots& resnSlots() { |
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| 103 | switch (mode) { |
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| 104 | case Empty: new(&data.resnSlots) ResnSlots{}; mode = Slots; // fallthrough |
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| 105 | case Slots: return data.resnSlots; |
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| 106 | case Params: assert(!"Cannot return to resnSlots from Params"); |
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| 107 | } |
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| 108 | } |
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| 109 | |
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| 110 | InferredParams& inferParams() { |
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| 111 | switch (mode) { |
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| 112 | case Slots: data.resnSlots.~ResnSlots(); // fallthrough |
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| 113 | case Empty: new(&data.inferParams) InferredParams{}; mode = Params; // fallthrough |
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| 114 | case Params: return data.inferParams; |
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| 115 | } |
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| 116 | } |
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| 117 | }; |
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| 118 | |
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| 119 | ptr<Type> result; |
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| 120 | ptr<TypeSubstitution> env; |
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| 121 | InferUnion inferred; |
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| 122 | bool extension = false; |
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| 123 | |
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[54e41b3] | 124 | Expr( const CodeLocation & loc, const Type * res = nullptr ) |
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| 125 | : ParseNode( loc ), result( res ), env(), inferred() {} |
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[79f7875] | 126 | |
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[9e1d485] | 127 | Expr * set_extension( bool ex ) { extension = ex; return this; } |
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[79f7875] | 128 | |
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[69bafd2] | 129 | virtual const Expr * accept( Visitor & v ) const override = 0; |
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[79f7875] | 130 | private: |
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[23f99e1] | 131 | Expr * clone() const override = 0; |
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[f3cc5b6] | 132 | MUTATE_FRIEND |
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[264e691] | 133 | }; |
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| 134 | |
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[87701b6] | 135 | /// The application of a function to a set of parameters. |
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[54e41b3] | 136 | /// Post-resolver form of `UntypedExpr` |
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| 137 | class ApplicationExpr final : public Expr { |
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| 138 | public: |
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| 139 | ptr<Expr> func; |
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| 140 | std::vector<ptr<Expr>> args; |
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| 141 | |
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| 142 | ApplicationExpr( const CodeLocation & loc, const Expr * f, std::vector<ptr<Expr>> && as = {} ); |
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| 143 | |
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| 144 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 145 | private: |
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| 146 | ApplicationExpr * clone() const override { return new ApplicationExpr{ *this }; } |
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[f3cc5b6] | 147 | MUTATE_FRIEND |
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[54e41b3] | 148 | }; |
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| 149 | |
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| 150 | /// The application of a function to a set of parameters, pre-overload resolution. |
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| 151 | class UntypedExpr final : public Expr { |
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| 152 | public: |
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| 153 | ptr<Expr> func; |
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| 154 | std::vector<ptr<Expr>> args; |
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| 155 | |
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| 156 | UntypedExpr( const CodeLocation & loc, const Expr * f, std::vector<ptr<Expr>> && as = {} ) |
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| 157 | : Expr( loc ), func( f ), args( std::move(as) ) {} |
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| 158 | |
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| 159 | /// Creates a new dereference expression |
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| 160 | static UntypedExpr * createDeref( const CodeLocation & loc, Expr * arg ); |
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| 161 | /// Creates a new assignment expression |
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| 162 | static UntypedExpr * createAssign( const CodeLocation & loc, Expr * lhs, Expr * rhs ); |
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| 163 | |
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| 164 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 165 | private: |
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| 166 | UntypedExpr * clone() const override { return new UntypedExpr{ *this }; } |
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[f3cc5b6] | 167 | MUTATE_FRIEND |
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[54e41b3] | 168 | }; |
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| 169 | |
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| 170 | /// A name whose name is as-yet undetermined. |
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| 171 | /// May also be used to avoid name mangling in codegen phase. |
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| 172 | class NameExpr final : public Expr { |
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| 173 | public: |
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| 174 | std::string name; |
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| 175 | |
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| 176 | NameExpr( const CodeLocation & loc, const std::string & n ) : Expr( loc ), name( n ) {} |
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| 177 | |
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| 178 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 179 | private: |
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| 180 | NameExpr * clone() const override { return new NameExpr{ *this }; } |
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[f3cc5b6] | 181 | MUTATE_FRIEND |
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[54e41b3] | 182 | }; |
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| 183 | |
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| 184 | /// Address-of expression `&e` |
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| 185 | class AddressExpr final : public Expr { |
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| 186 | public: |
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| 187 | ptr<Expr> arg; |
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| 188 | |
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| 189 | AddressExpr( const CodeLocation & loc, const Expr * a ); |
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| 190 | |
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| 191 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 192 | private: |
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| 193 | AddressExpr * clone() const override { return new AddressExpr{ *this }; } |
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[f3cc5b6] | 194 | MUTATE_FRIEND |
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[54e41b3] | 195 | }; |
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| 196 | |
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| 197 | /// GCC &&label |
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| 198 | /// https://gcc.gnu.org/onlinedocs/gcc-3.4.2/gcc/Labels-as-Values.html |
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| 199 | class LabelAddressExpr final : public Expr { |
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| 200 | public: |
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| 201 | Label arg; |
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| 202 | |
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| 203 | LabelAddressExpr( const CodeLocation & loc, Label && a ); |
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| 204 | |
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| 205 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 206 | private: |
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| 207 | LabelAddressExpr * clone() const override { return new LabelAddressExpr{ *this }; } |
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[f3cc5b6] | 208 | MUTATE_FRIEND |
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[54e41b3] | 209 | }; |
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| 210 | |
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| 211 | /// Whether a cast existed in the program source or not |
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| 212 | enum GeneratedFlag { ExplicitCast, GeneratedCast }; |
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| 213 | |
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| 214 | /// A type cast, e.g. `(int)e` |
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| 215 | class CastExpr final : public Expr { |
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| 216 | public: |
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| 217 | ptr<Expr> arg; |
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| 218 | GeneratedFlag isGenerated; |
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| 219 | |
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[87701b6] | 220 | CastExpr( const CodeLocation & loc, const Expr * a, const Type * to, |
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[54e41b3] | 221 | GeneratedFlag g = GeneratedCast ) : Expr( loc, to ), arg( a ), isGenerated( g ) {} |
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| 222 | /// Cast-to-void |
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| 223 | CastExpr( const CodeLocation & loc, const Expr * a, GeneratedFlag g = GeneratedCast ); |
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| 224 | |
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| 225 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 226 | private: |
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| 227 | CastExpr * clone() const override { return new CastExpr{ *this }; } |
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[f3cc5b6] | 228 | MUTATE_FRIEND |
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[54e41b3] | 229 | }; |
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| 230 | |
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| 231 | /// A cast to "keyword types", e.g. `(thread &)t` |
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| 232 | class KeywordCastExpr final : public Expr { |
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| 233 | public: |
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| 234 | ptr<Expr> arg; |
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| 235 | enum Target { Coroutine, Thread, Monitor, NUMBER_OF_TARGETS } target; |
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| 236 | |
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| 237 | KeywordCastExpr( const CodeLocation & loc, const Expr * a, Target t ) |
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| 238 | : Expr( loc ), arg( a ), target( t ) {} |
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| 239 | |
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| 240 | /// Get a name for the target type |
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| 241 | const std::string& targetString() const; |
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| 242 | |
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| 243 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 244 | private: |
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| 245 | KeywordCastExpr * clone() const override { return new KeywordCastExpr{ *this }; } |
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[f3cc5b6] | 246 | MUTATE_FRIEND |
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[54e41b3] | 247 | }; |
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| 248 | |
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| 249 | /// A virtual dynamic cast, e.g. `(virtual exception)e` |
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| 250 | class VirtualCastExpr final : public Expr { |
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| 251 | public: |
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| 252 | ptr<Expr> arg; |
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| 253 | |
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| 254 | VirtualCastExpr( const CodeLocation & loc, const Expr * a, const Type * to ) |
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| 255 | : Expr( loc, to ), arg( a ) {} |
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| 256 | |
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| 257 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 258 | private: |
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| 259 | VirtualCastExpr * clone() const override { return new VirtualCastExpr{ *this }; } |
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[f3cc5b6] | 260 | MUTATE_FRIEND |
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[54e41b3] | 261 | }; |
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| 262 | |
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| 263 | /// A member selection operation before expression resolution, e.g. `q.p` |
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| 264 | class UntypedMemberExpr final : public Expr { |
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| 265 | public: |
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| 266 | ptr<Expr> member; |
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| 267 | ptr<Expr> aggregate; |
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| 268 | |
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| 269 | UntypedMemberExpr( const CodeLocation & loc, const Expr * mem, const Expr * agg ) |
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| 270 | : Expr( loc ), member( mem ), aggregate( agg ) { assert( aggregate ); } |
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| 271 | |
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| 272 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 273 | private: |
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| 274 | UntypedMemberExpr * clone() const override { return new UntypedMemberExpr{ *this }; } |
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[f3cc5b6] | 275 | MUTATE_FRIEND |
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[54e41b3] | 276 | }; |
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| 277 | |
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| 278 | /// A member selection operation after expression resolution, e.g. `q.p` |
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| 279 | class MemberExpr final : public Expr { |
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| 280 | public: |
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| 281 | readonly<DeclWithType> member; |
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| 282 | ptr<Expr> aggregate; |
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| 283 | |
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| 284 | MemberExpr( const CodeLocation & loc, const DeclWithType * mem, const Expr * agg ); |
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| 285 | |
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| 286 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 287 | private: |
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| 288 | MemberExpr * clone() const override { return new MemberExpr{ *this }; } |
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[f3cc5b6] | 289 | MUTATE_FRIEND |
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[54e41b3] | 290 | }; |
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| 291 | |
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| 292 | /// A reference to a named variable. |
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| 293 | class VariableExpr final : public Expr { |
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| 294 | public: |
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| 295 | readonly<DeclWithType> var; |
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| 296 | |
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| 297 | VariableExpr( const CodeLocation & loc, const DeclWithType * v ); |
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| 298 | |
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| 299 | /// generates a function pointer for a given function |
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| 300 | static VariableExpr * functionPointer( const CodeLocation & loc, const FunctionDecl * decl ); |
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| 301 | |
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| 302 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 303 | private: |
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| 304 | VariableExpr * clone() const override { return new VariableExpr{ *this }; } |
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[f3cc5b6] | 305 | MUTATE_FRIEND |
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[54e41b3] | 306 | }; |
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| 307 | |
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| 308 | /// A compile-time constant |
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| 309 | class ConstantExpr final : public Expr { |
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| 310 | union Val { |
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| 311 | unsigned long long ival; |
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| 312 | double dval; |
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[87701b6] | 313 | |
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[54e41b3] | 314 | Val( unsigned long long i ) : ival( i ) {} |
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| 315 | Val( double d ) : dval( d ) {} |
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| 316 | } val; |
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| 317 | public: |
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| 318 | std::string rep; |
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| 319 | |
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[87701b6] | 320 | ConstantExpr( |
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[54e41b3] | 321 | const CodeLocation & loc, const Type * ty, const std::string & r, unsigned long long v ) |
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| 322 | : Expr( loc, ty ), val( v ), rep( r ) {} |
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| 323 | ConstantExpr( const CodeLocation & loc, const Type * ty, const std::string & r, double v ) |
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| 324 | : Expr( loc, ty ), val( v ), rep( r ) {} |
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[87701b6] | 325 | |
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[54e41b3] | 326 | /// Gets the value of this constant as an integer |
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| 327 | long long int intValue() const; |
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| 328 | /// Gets the value of this constant as floating point |
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| 329 | double floatValue() const; |
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| 330 | |
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| 331 | /// generates a boolean constant of the given bool |
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| 332 | static ConstantExpr * from_bool( const CodeLocation & loc, bool b ); |
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| 333 | /// generates a char constant of the given char |
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| 334 | static ConstantExpr * from_char( const CodeLocation & loc, char c ); |
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| 335 | /// generates an integer constant of the given int |
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| 336 | static ConstantExpr * from_int( const CodeLocation & loc, int i ); |
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| 337 | /// generates an integer constant of the given unsigned long int |
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| 338 | static ConstantExpr * from_ulong( const CodeLocation & loc, unsigned long i ); |
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| 339 | /// generates a floating point constant of the given double |
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| 340 | static ConstantExpr * from_double( const CodeLocation & loc, double d ); |
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| 341 | /// generates an array of chars constant of the given string |
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| 342 | static ConstantExpr * from_string( const CodeLocation & loc, const std::string & s ); |
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| 343 | /// generates a null pointer value for the given type. void * if omitted. |
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| 344 | static ConstantExpr * null( const CodeLocation & loc, const Type * ptrType = nullptr ); |
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| 345 | |
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| 346 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 347 | private: |
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| 348 | ConstantExpr * clone() const override { return new ConstantExpr{ *this }; } |
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[f3cc5b6] | 349 | MUTATE_FRIEND |
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[54e41b3] | 350 | }; |
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| 351 | |
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| 352 | /// sizeof expression, e.g. `sizeof(int)`, `sizeof 3+4` |
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| 353 | class SizeofExpr final : public Expr { |
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| 354 | public: |
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| 355 | ptr<Expr> expr; |
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| 356 | ptr<Type> type; |
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| 357 | |
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| 358 | SizeofExpr( const CodeLocation & loc, const Expr * e ); |
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| 359 | SizeofExpr( const CodeLocation & loc, const Type * t ); |
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| 360 | // deliberately no disambiguating overload for nullptr_t |
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| 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 | SizeofExpr * clone() const override { return new SizeofExpr{ *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 | /// alignof expression, e.g. `alignof(int)`, `alignof 3+4` |
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| 369 | class AlignofExpr final : public Expr { |
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| 370 | public: |
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| 371 | ptr<Expr> expr; |
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| 372 | ptr<Type> type; |
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| 373 | |
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| 374 | AlignofExpr( const CodeLocation & loc, const Expr * e ); |
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| 375 | AlignofExpr( const CodeLocation & loc, const Type * t ); |
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| 376 | // deliberately no disambiguating overload for nullptr_t |
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| 377 | |
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| 378 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 379 | private: |
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| 380 | AlignofExpr * clone() const override { return new AlignofExpr{ *this }; } |
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[f3cc5b6] | 381 | MUTATE_FRIEND |
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[54e41b3] | 382 | }; |
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| 383 | |
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| 384 | /// offsetof expression before resolver determines field, e.g. `offsetof(MyStruct, myfield)` |
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| 385 | class UntypedOffsetofExpr final : public Expr { |
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| 386 | public: |
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| 387 | ptr<Type> type; |
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| 388 | std::string member; |
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| 389 | |
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| 390 | UntypedOffsetofExpr( const CodeLocation & loc, const Type * ty, const std::string & mem ) |
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| 391 | : Expr( loc ), type( ty ), member( mem ) {} |
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| 392 | |
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| 393 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 394 | private: |
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| 395 | UntypedOffsetofExpr * clone() const override { return new UntypedOffsetofExpr{ *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 | /// offsetof expression after resolver determines field, e.g. `offsetof(MyStruct, myfield)` |
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| 400 | class OffsetofExpr final : public Expr { |
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| 401 | public: |
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| 402 | ptr<Type> type; |
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| 403 | readonly<DeclWithType> member; |
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| 404 | |
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| 405 | OffsetofExpr( const CodeLocation & loc, const Type * ty, const DeclWithType * mem ); |
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| 406 | |
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| 407 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 408 | private: |
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| 409 | OffsetofExpr * clone() const override { return new OffsetofExpr{ *this }; } |
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[f3cc5b6] | 410 | MUTATE_FRIEND |
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[54e41b3] | 411 | }; |
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| 412 | |
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| 413 | /// a pack of field-offsets for a generic type |
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| 414 | class OffsetPackExpr final : public Expr { |
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| 415 | public: |
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| 416 | ptr<StructInstType> type; |
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| 417 | |
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| 418 | OffsetPackExpr( const CodeLocation & loc, const StructInstType * ty ); |
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| 419 | |
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| 420 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 421 | private: |
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| 422 | OffsetPackExpr * clone() const override { return new OffsetPackExpr{ *this }; } |
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[f3cc5b6] | 423 | MUTATE_FRIEND |
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[54e41b3] | 424 | }; |
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| 425 | |
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| 426 | /// Variants of short-circuiting logical expression |
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| 427 | enum LogicalFlag { OrExpr, AndExpr }; |
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| 428 | |
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| 429 | /// Short-circuiting boolean expression (`&&` or `||`) |
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| 430 | class LogicalExpr final : public Expr { |
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| 431 | public: |
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| 432 | ptr<Expr> arg1; |
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| 433 | ptr<Expr> arg2; |
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| 434 | LogicalFlag isAnd; |
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| 435 | |
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| 436 | LogicalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, LogicalFlag ia ); |
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| 437 | |
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| 438 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 439 | private: |
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| 440 | LogicalExpr * clone() const override { return new LogicalExpr{ *this }; } |
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[f3cc5b6] | 441 | MUTATE_FRIEND |
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[54e41b3] | 442 | }; |
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| 443 | |
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| 444 | /// Three-argument conditional e.g. `p ? a : b` |
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| 445 | class ConditionalExpr final : public Expr { |
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| 446 | public: |
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| 447 | ptr<Expr> arg1; |
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| 448 | ptr<Expr> arg2; |
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| 449 | ptr<Expr> arg3; |
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| 450 | |
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| 451 | ConditionalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, const Expr * a3 ) |
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| 452 | : Expr( loc ), arg1( a1 ), arg2( a2 ), arg3( a3 ) {} |
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| 453 | |
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| 454 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 455 | private: |
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| 456 | ConditionalExpr * clone() const override { return new ConditionalExpr{ *this }; } |
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[f3cc5b6] | 457 | MUTATE_FRIEND |
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[54e41b3] | 458 | }; |
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| 459 | |
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| 460 | /// Comma expression e.g. `( a , b )` |
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| 461 | class CommaExpr final : public Expr { |
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| 462 | public: |
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| 463 | ptr<Expr> arg1; |
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| 464 | ptr<Expr> arg2; |
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| 465 | |
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[87701b6] | 466 | CommaExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2 ) |
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[54e41b3] | 467 | : Expr( loc ), arg1( a1 ), arg2( a2 ) {} |
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| 468 | |
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| 469 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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| 470 | private: |
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| 471 | CommaExpr * clone() const override { return new CommaExpr{ *this }; } |
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[f3cc5b6] | 472 | MUTATE_FRIEND |
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[54e41b3] | 473 | }; |
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| 474 | |
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[264e691] | 475 | /// A type used as an expression (e.g. a type generator parameter) |
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| 476 | class TypeExpr final : public Expr { |
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| 477 | public: |
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| 478 | ptr<Type> type; |
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| 479 | |
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| 480 | TypeExpr( const CodeLocation & loc, const Type * t ) : Expr(loc), type(t) {} |
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| 481 | |
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[69bafd2] | 482 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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[264e691] | 483 | private: |
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| 484 | TypeExpr * clone() const override { return new TypeExpr{ *this }; } |
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[f3cc5b6] | 485 | MUTATE_FRIEND |
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[79f7875] | 486 | }; |
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| 487 | |
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[54e41b3] | 488 | /// A GCC "asm constraint operand" used in an asm statement, e.g. `[output] "=f" (result)`. |
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| 489 | /// https://gcc.gnu.org/onlinedocs/gcc-4.7.1/gcc/Machine-Constraints.html#Machine-Constraints |
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| 490 | class AsmExpr final : public Expr { |
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| 491 | public: |
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| 492 | ptr<Expr> inout; |
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[87701b6] | 493 | ptr<Expr> constraint; |
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[54e41b3] | 494 | }; |
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[6d51bd7] | 495 | |
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[79f7875] | 496 | } |
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| 497 | |
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[f3cc5b6] | 498 | #undef MUTATE_FRIEND |
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| 499 | |
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[79f7875] | 500 | // Local Variables: // |
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| 501 | // tab-width: 4 // |
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| 502 | // mode: c++ // |
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| 503 | // compile-command: "make install" // |
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| 504 | // End: // |
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