[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 {
|
---|
| 384 | public:
|
---|
| 385 | ptr<Expr> member;
|
---|
| 386 | ptr<Expr> aggregate;
|
---|
| 387 |
|
---|
| 388 | UntypedMemberExpr( const CodeLocation & loc, const Expr * mem, const Expr * agg )
|
---|
| 389 | : Expr( loc ), member( mem ), aggregate( agg ) { assert( aggregate ); }
|
---|
| 390 |
|
---|
[cf32116] | 391 | bool get_lvalue() const final;
|
---|
| 392 |
|
---|
[54e41b3] | 393 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 394 | private:
|
---|
| 395 | UntypedMemberExpr * clone() const override { return new UntypedMemberExpr{ *this }; }
|
---|
[f3cc5b6] | 396 | MUTATE_FRIEND
|
---|
[54e41b3] | 397 | };
|
---|
| 398 |
|
---|
| 399 | /// A member selection operation after expression resolution, e.g. `q.p`
|
---|
| 400 | class MemberExpr final : public Expr {
|
---|
| 401 | public:
|
---|
| 402 | readonly<DeclWithType> member;
|
---|
| 403 | ptr<Expr> aggregate;
|
---|
| 404 |
|
---|
| 405 | MemberExpr( const CodeLocation & loc, const DeclWithType * mem, const Expr * agg );
|
---|
| 406 |
|
---|
[cf32116] | 407 | bool get_lvalue() const final;
|
---|
| 408 |
|
---|
[54e41b3] | 409 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 410 | private:
|
---|
| 411 | MemberExpr * clone() const override { return new MemberExpr{ *this }; }
|
---|
[f3cc5b6] | 412 | MUTATE_FRIEND
|
---|
[ae265b55] | 413 |
|
---|
| 414 | // Custructor overload meant only for AST conversion
|
---|
| 415 | enum NoOpConstruction { NoOpConstructionChosen };
|
---|
| 416 | MemberExpr( const CodeLocation & loc, const DeclWithType * mem, const Expr * agg,
|
---|
| 417 | NoOpConstruction overloadSelector );
|
---|
| 418 | friend class ::ConverterOldToNew;
|
---|
| 419 | friend class ::ConverterNewToOld;
|
---|
[54e41b3] | 420 | };
|
---|
| 421 |
|
---|
[c36298d] | 422 | /// A compile-time constant.
|
---|
| 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.
|
---|
| 424 | /// Integer constants get special treatment, e.g. for verifying array operations, when an integer constant occurs as the length of an array.
|
---|
[54e41b3] | 425 | class ConstantExpr final : public Expr {
|
---|
| 426 | public:
|
---|
[c36298d] | 427 | // Representation of this constant, as it occurs in .cfa source and .cfa.cc result.
|
---|
[54e41b3] | 428 | std::string rep;
|
---|
| 429 |
|
---|
[87701b6] | 430 | ConstantExpr(
|
---|
[7870799] | 431 | const CodeLocation & loc, const Type * ty, const std::string & r,
|
---|
[c36298d] | 432 | std::optional<unsigned long long> i )
|
---|
[490fb92e] | 433 | : Expr( loc, ty ), rep( r ), ival( i ), underlyer(ty) {}
|
---|
[87701b6] | 434 |
|
---|
[c36298d] | 435 | /// Gets the integer value of this constant, if one is appropriate to its type.
|
---|
| 436 | /// Throws a SemanticError if the type is not appropriate for value-as-integer.
|
---|
| 437 | /// Suffers an assertion failure the type is appropriate but no integer value was supplied to the constructor.
|
---|
[54e41b3] | 438 | long long int intValue() const;
|
---|
| 439 |
|
---|
[b91bfde] | 440 | /// Generates a boolean constant of the given bool.
|
---|
[54e41b3] | 441 | static ConstantExpr * from_bool( const CodeLocation & loc, bool b );
|
---|
[b91bfde] | 442 | /// Generates an integer constant of the given int.
|
---|
[54e41b3] | 443 | static ConstantExpr * from_int( const CodeLocation & loc, int i );
|
---|
[b91bfde] | 444 | /// Generates an integer constant of the given unsigned long int.
|
---|
[54e41b3] | 445 | static ConstantExpr * from_ulong( const CodeLocation & loc, unsigned long i );
|
---|
[b91bfde] | 446 | /// Generates a string constant from the given string (char type, unquoted string).
|
---|
| 447 | static ConstantExpr * from_string( const CodeLocation & loc, const std::string & string );
|
---|
| 448 | /// Generates a null pointer value for the given type. void * if omitted.
|
---|
[54e41b3] | 449 | static ConstantExpr * null( const CodeLocation & loc, const Type * ptrType = nullptr );
|
---|
| 450 |
|
---|
| 451 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 452 | private:
|
---|
| 453 | ConstantExpr * clone() const override { return new ConstantExpr{ *this }; }
|
---|
[f3cc5b6] | 454 | MUTATE_FRIEND
|
---|
[c36298d] | 455 |
|
---|
| 456 | std::optional<unsigned long long> ival;
|
---|
| 457 |
|
---|
| 458 | // Intended only for legacy support of roundtripping the old AST.
|
---|
| 459 | // Captures the very-locally inferred type, before the resolver modifies the type of this ConstantExpression.
|
---|
| 460 | // In the old AST it's constExpr->constant.type
|
---|
| 461 | ptr<Type> underlyer;
|
---|
| 462 | friend class ::ConverterOldToNew;
|
---|
| 463 | friend class ::ConverterNewToOld;
|
---|
[54e41b3] | 464 | };
|
---|
| 465 |
|
---|
| 466 | /// sizeof expression, e.g. `sizeof(int)`, `sizeof 3+4`
|
---|
| 467 | class SizeofExpr final : public Expr {
|
---|
| 468 | public:
|
---|
| 469 | ptr<Expr> expr;
|
---|
| 470 | ptr<Type> type;
|
---|
| 471 |
|
---|
| 472 | SizeofExpr( const CodeLocation & loc, const Expr * e );
|
---|
| 473 | SizeofExpr( const CodeLocation & loc, const Type * t );
|
---|
| 474 | // deliberately no disambiguating overload for nullptr_t
|
---|
| 475 |
|
---|
| 476 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 477 | private:
|
---|
| 478 | SizeofExpr * clone() const override { return new SizeofExpr{ *this }; }
|
---|
[f3cc5b6] | 479 | MUTATE_FRIEND
|
---|
[54e41b3] | 480 | };
|
---|
| 481 |
|
---|
| 482 | /// alignof expression, e.g. `alignof(int)`, `alignof 3+4`
|
---|
| 483 | class AlignofExpr final : public Expr {
|
---|
| 484 | public:
|
---|
| 485 | ptr<Expr> expr;
|
---|
| 486 | ptr<Type> type;
|
---|
| 487 |
|
---|
| 488 | AlignofExpr( const CodeLocation & loc, const Expr * e );
|
---|
| 489 | AlignofExpr( const CodeLocation & loc, const Type * t );
|
---|
| 490 | // deliberately no disambiguating overload for nullptr_t
|
---|
| 491 |
|
---|
| 492 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 493 | private:
|
---|
| 494 | AlignofExpr * clone() const override { return new AlignofExpr{ *this }; }
|
---|
[f3cc5b6] | 495 | MUTATE_FRIEND
|
---|
[54e41b3] | 496 | };
|
---|
| 497 |
|
---|
| 498 | /// offsetof expression before resolver determines field, e.g. `offsetof(MyStruct, myfield)`
|
---|
| 499 | class UntypedOffsetofExpr final : public Expr {
|
---|
| 500 | public:
|
---|
| 501 | ptr<Type> type;
|
---|
| 502 | std::string member;
|
---|
| 503 |
|
---|
| 504 | UntypedOffsetofExpr( const CodeLocation & loc, const Type * ty, const std::string & mem )
|
---|
| 505 | : Expr( loc ), type( ty ), member( mem ) {}
|
---|
| 506 |
|
---|
| 507 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 508 | private:
|
---|
| 509 | UntypedOffsetofExpr * clone() const override { return new UntypedOffsetofExpr{ *this }; }
|
---|
[f3cc5b6] | 510 | MUTATE_FRIEND
|
---|
[54e41b3] | 511 | };
|
---|
| 512 |
|
---|
| 513 | /// offsetof expression after resolver determines field, e.g. `offsetof(MyStruct, myfield)`
|
---|
| 514 | class OffsetofExpr final : public Expr {
|
---|
| 515 | public:
|
---|
| 516 | ptr<Type> type;
|
---|
| 517 | readonly<DeclWithType> member;
|
---|
| 518 |
|
---|
| 519 | OffsetofExpr( const CodeLocation & loc, const Type * ty, const DeclWithType * mem );
|
---|
| 520 |
|
---|
| 521 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 522 | private:
|
---|
| 523 | OffsetofExpr * clone() const override { return new OffsetofExpr{ *this }; }
|
---|
[f3cc5b6] | 524 | MUTATE_FRIEND
|
---|
[54e41b3] | 525 | };
|
---|
| 526 |
|
---|
| 527 | /// a pack of field-offsets for a generic type
|
---|
| 528 | class OffsetPackExpr final : public Expr {
|
---|
| 529 | public:
|
---|
| 530 | ptr<StructInstType> type;
|
---|
| 531 |
|
---|
| 532 | OffsetPackExpr( const CodeLocation & loc, const StructInstType * ty );
|
---|
| 533 |
|
---|
| 534 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 535 | private:
|
---|
| 536 | OffsetPackExpr * clone() const override { return new OffsetPackExpr{ *this }; }
|
---|
[f3cc5b6] | 537 | MUTATE_FRIEND
|
---|
[54e41b3] | 538 | };
|
---|
| 539 |
|
---|
| 540 | /// Variants of short-circuiting logical expression
|
---|
| 541 | enum LogicalFlag { OrExpr, AndExpr };
|
---|
| 542 |
|
---|
| 543 | /// Short-circuiting boolean expression (`&&` or `||`)
|
---|
| 544 | class LogicalExpr final : public Expr {
|
---|
| 545 | public:
|
---|
| 546 | ptr<Expr> arg1;
|
---|
| 547 | ptr<Expr> arg2;
|
---|
| 548 | LogicalFlag isAnd;
|
---|
| 549 |
|
---|
| 550 | LogicalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, LogicalFlag ia );
|
---|
| 551 |
|
---|
| 552 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 553 | private:
|
---|
| 554 | LogicalExpr * clone() const override { return new LogicalExpr{ *this }; }
|
---|
[f3cc5b6] | 555 | MUTATE_FRIEND
|
---|
[54e41b3] | 556 | };
|
---|
| 557 |
|
---|
| 558 | /// Three-argument conditional e.g. `p ? a : b`
|
---|
| 559 | class ConditionalExpr final : public Expr {
|
---|
| 560 | public:
|
---|
| 561 | ptr<Expr> arg1;
|
---|
| 562 | ptr<Expr> arg2;
|
---|
| 563 | ptr<Expr> arg3;
|
---|
| 564 |
|
---|
| 565 | ConditionalExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2, const Expr * a3 )
|
---|
| 566 | : Expr( loc ), arg1( a1 ), arg2( a2 ), arg3( a3 ) {}
|
---|
| 567 |
|
---|
| 568 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 569 | private:
|
---|
| 570 | ConditionalExpr * clone() const override { return new ConditionalExpr{ *this }; }
|
---|
[f3cc5b6] | 571 | MUTATE_FRIEND
|
---|
[54e41b3] | 572 | };
|
---|
| 573 |
|
---|
| 574 | /// Comma expression e.g. `( a , b )`
|
---|
| 575 | class CommaExpr final : public Expr {
|
---|
| 576 | public:
|
---|
| 577 | ptr<Expr> arg1;
|
---|
| 578 | ptr<Expr> arg2;
|
---|
| 579 |
|
---|
[87701b6] | 580 | CommaExpr( const CodeLocation & loc, const Expr * a1, const Expr * a2 )
|
---|
[4e13e2a] | 581 | : Expr( loc ), arg1( a1 ), arg2( a2 ) {
|
---|
| 582 | this->result = a2->result;
|
---|
| 583 | }
|
---|
[54e41b3] | 584 |
|
---|
[cf32116] | 585 | bool get_lvalue() const final;
|
---|
| 586 |
|
---|
[54e41b3] | 587 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 588 | private:
|
---|
| 589 | CommaExpr * clone() const override { return new CommaExpr{ *this }; }
|
---|
[f3cc5b6] | 590 | MUTATE_FRIEND
|
---|
[54e41b3] | 591 | };
|
---|
| 592 |
|
---|
[264e691] | 593 | /// A type used as an expression (e.g. a type generator parameter)
|
---|
| 594 | class TypeExpr final : public Expr {
|
---|
| 595 | public:
|
---|
| 596 | ptr<Type> type;
|
---|
| 597 |
|
---|
| 598 | TypeExpr( const CodeLocation & loc, const Type * t ) : Expr(loc), type(t) {}
|
---|
| 599 |
|
---|
[69bafd2] | 600 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
[264e691] | 601 | private:
|
---|
| 602 | TypeExpr * clone() const override { return new TypeExpr{ *this }; }
|
---|
[f3cc5b6] | 603 | MUTATE_FRIEND
|
---|
[79f7875] | 604 | };
|
---|
| 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:
|
---|
[665f432] | 610 | std::string inout;
|
---|
[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
|
---|
| 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); }
|
---|
[9b4f329] | 631 |
|
---|
| 632 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 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
|
---|
| 769 | class UniqueExpr final : public Expr {
|
---|
| 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 )
|
---|
[9b4f329] | 832 | : Expr( loc, e->result ), expr( e ), deleteStmt( del ) { assert( expr->result ); }
|
---|
| 833 |
|
---|
| 834 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 835 | private:
|
---|
| 836 | DeletedExpr * clone() const override { return new DeletedExpr{ *this }; }
|
---|
| 837 | MUTATE_FRIEND
|
---|
| 838 | };
|
---|
| 839 |
|
---|
| 840 | /// Use of a default argument.
|
---|
| 841 | /// Internal to resolver.
|
---|
| 842 | class DefaultArgExpr final : public Expr {
|
---|
| 843 | public:
|
---|
| 844 | ptr<Expr> expr;
|
---|
| 845 |
|
---|
| 846 | DefaultArgExpr( const CodeLocation & loc, const Expr * e )
|
---|
| 847 | : Expr( loc, e->result ), expr( e ) { assert( e->result ); }
|
---|
| 848 |
|
---|
| 849 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 850 | private:
|
---|
| 851 | DefaultArgExpr * clone() const override { return new DefaultArgExpr{ *this }; }
|
---|
| 852 | MUTATE_FRIEND
|
---|
| 853 | };
|
---|
| 854 |
|
---|
| 855 | /// C11 _Generic expression
|
---|
| 856 | class GenericExpr final : public Expr {
|
---|
| 857 | public:
|
---|
| 858 | /// One arm of the _Generic expr
|
---|
| 859 | struct Association {
|
---|
| 860 | ptr<Type> type;
|
---|
| 861 | ptr<Expr> expr;
|
---|
| 862 |
|
---|
| 863 | Association() = default;
|
---|
| 864 | // default case
|
---|
| 865 | Association( const Expr * e ) : type(), expr( e ) {}
|
---|
| 866 | // non-default case
|
---|
| 867 | Association( const Type * t, const Expr * e ) : type( t ), expr( e ) {}
|
---|
| 868 | };
|
---|
| 869 |
|
---|
| 870 | ptr<Expr> control;
|
---|
| 871 | std::vector<Association> associations;
|
---|
| 872 |
|
---|
| 873 | GenericExpr( const CodeLocation & loc, const Expr * ctrl, std::vector<Association> && assns )
|
---|
| 874 | : Expr( loc ), control( ctrl ), associations( std::move(assns) ) {}
|
---|
| 875 |
|
---|
| 876 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); }
|
---|
| 877 | private:
|
---|
| 878 | GenericExpr * clone() const override { return new GenericExpr{ *this }; }
|
---|
| 879 | MUTATE_FRIEND
|
---|
[54e41b3] | 880 | };
|
---|
[6d51bd7] | 881 |
|
---|
[246c245] | 882 |
|
---|
[79f7875] | 883 | }
|
---|
| 884 |
|
---|
[f3cc5b6] | 885 | #undef MUTATE_FRIEND
|
---|
| 886 |
|
---|
[79f7875] | 887 | // Local Variables: //
|
---|
| 888 | // tab-width: 4 //
|
---|
| 889 | // mode: c++ //
|
---|
| 890 | // compile-command: "make install" //
|
---|
| 891 | // End: //
|
---|