[9131e54] | 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 | // Init.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 <utility> // for move |
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| 19 | #include <vector> |
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| 20 | |
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| 21 | #include "ParseNode.hpp" |
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| 22 | #include "Node.hpp" // for ptr |
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| 23 | #include "Visitor.hpp" |
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| 24 | |
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[f3cc5b6] | 25 | // Must be included in *all* AST classes; should be #undef'd at the end of the file |
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[41b24c8] | 26 | #define MUTATE_FRIEND template<typename node_t> friend node_t * mutate(const node_t * node); |
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[f3cc5b6] | 27 | |
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[9131e54] | 28 | namespace ast { |
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| 29 | |
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| 30 | class Expr; |
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| 31 | class Stmt; |
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| 32 | |
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[e0115286] | 33 | /// List of designator (NameExpr, VariableExpr, and ConstantExpr) expressions that specify an |
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[9131e54] | 34 | /// object being initialized |
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| 35 | class Designation final : public ParseNode { |
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| 36 | public: |
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| 37 | std::vector<ptr<Expr>> designators; |
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| 38 | |
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[e0115286] | 39 | Designation( const CodeLocation& loc, std::vector<ptr<Expr>>&& ds = {} ) |
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[9131e54] | 40 | : ParseNode( loc ), designators( std::move(ds) ) {} |
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| 41 | |
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[23f99e1] | 42 | const Designation* accept( Visitor& v ) const override { return v.visit( this ); } |
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[9131e54] | 43 | private: |
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[23f99e1] | 44 | Designation* clone() const override { return new Designation{ *this }; } |
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[f3cc5b6] | 45 | MUTATE_FRIEND |
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[9131e54] | 46 | }; |
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| 47 | |
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[9e1d485] | 48 | /// Flag for whether to construct from initialzier |
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| 49 | enum ConstructFlag { DoConstruct, MaybeConstruct }; |
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| 50 | |
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[9131e54] | 51 | /// Object initializer base class |
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| 52 | class Init : public ParseNode { |
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| 53 | public: |
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[9e1d485] | 54 | ConstructFlag maybeConstructed; |
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[9131e54] | 55 | |
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[9e1d485] | 56 | Init( const CodeLocation& loc, ConstructFlag mc ) : ParseNode( loc ), maybeConstructed( mc ) {} |
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[9131e54] | 57 | |
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[23f99e1] | 58 | const Init * accept( Visitor& v ) const override = 0; |
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[9131e54] | 59 | private: |
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[87701b6] | 60 | Init * clone() const override = 0; |
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[f3cc5b6] | 61 | MUTATE_FRIEND |
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[9131e54] | 62 | }; |
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| 63 | |
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| 64 | /// Initializer for a common object: `int x = 4` |
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| 65 | class SingleInit final : public Init { |
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| 66 | public: |
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| 67 | /// value to initialize to. Must be compile-time constant. |
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| 68 | ptr<Expr> value; |
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| 69 | |
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[9e1d485] | 70 | SingleInit( const CodeLocation& loc, Expr* val, ConstructFlag mc = DoConstruct ) |
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[9131e54] | 71 | : Init( loc, mc ), value( val ) {} |
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| 72 | |
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[23f99e1] | 73 | const Init * accept( Visitor & v ) const override { return v.visit( this ); } |
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[9131e54] | 74 | private: |
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[23f99e1] | 75 | SingleInit * clone() const override { return new SingleInit{ *this }; } |
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[f3cc5b6] | 76 | MUTATE_FRIEND |
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[9131e54] | 77 | }; |
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| 78 | |
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| 79 | /// Initializer recursively composed of a list of initializers. |
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| 80 | /// Used to initialize an array or aggregate: `int a[] = { 1, 2, 3 }` |
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| 81 | class ListInit final : public Init { |
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| 82 | public: |
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| 83 | /// list of initializers |
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| 84 | std::vector<ptr<Init>> initializers; |
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| 85 | /// list of designators; order/length is consistent with initializers |
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| 86 | std::vector<ptr<Designation>> designations; |
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| 87 | |
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[e0115286] | 88 | ListInit( const CodeLocation& loc, std::vector<ptr<Init>>&& is, |
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[9e1d485] | 89 | std::vector<ptr<Designation>>&& ds = {}, ConstructFlag mc = DoConstruct ); |
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[e0115286] | 90 | |
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[9131e54] | 91 | using iterator = std::vector<ptr<Init>>::iterator; |
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| 92 | using const_iterator = std::vector<ptr<Init>>::const_iterator; |
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| 93 | iterator begin() { return initializers.begin(); } |
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| 94 | iterator end() { return initializers.end(); } |
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| 95 | const_iterator begin() const { return initializers.begin(); } |
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| 96 | const_iterator end() const { return initializers.end(); } |
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| 97 | |
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[23f99e1] | 98 | const Init * accept( Visitor & v ) const override { return v.visit( this ); } |
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[9131e54] | 99 | private: |
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[23f99e1] | 100 | ListInit * clone() const override { return new ListInit{ *this }; } |
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[f3cc5b6] | 101 | MUTATE_FRIEND |
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[9131e54] | 102 | }; |
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| 103 | |
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| 104 | /// Either a constructor expression or a C-style initializer. |
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[e0115286] | 105 | /// Should not be necessary to create manually; instead set `maybeConstructed` true on `SingleInit` |
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[9131e54] | 106 | /// or `ListInit` if the object should be constructed. |
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| 107 | class ConstructorInit final : public Init { |
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| 108 | public: |
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| 109 | ptr<Stmt> ctor; |
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| 110 | ptr<Stmt> dtor; |
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[e0115286] | 111 | /// C-style initializer made up of SingleInit/ListInit nodes to use as a fallback if an |
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[9131e54] | 112 | /// appropriate constructor definition is not found by the resolver. |
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| 113 | ptr<Init> init; |
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| 114 | |
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| 115 | ConstructorInit( const CodeLocation& loc, Stmt* ctor, Stmt* dtor, Init* init ) |
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[9e1d485] | 116 | : Init( loc, DoConstruct ), ctor( ctor ), dtor( dtor ), init( init ) {} |
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[9131e54] | 117 | |
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[23f99e1] | 118 | const Init * accept( Visitor & v ) const override { return v.visit( this ); } |
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[9131e54] | 119 | private: |
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[23f99e1] | 120 | ConstructorInit * clone() const override { return new ConstructorInit{ *this }; } |
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[f3cc5b6] | 121 | MUTATE_FRIEND |
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[9131e54] | 122 | }; |
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| 123 | |
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| 124 | } |
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| 125 | |
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[f3cc5b6] | 126 | #undef MUTATE_FRIEND |
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| 127 | |
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[9131e54] | 128 | // Local Variables: // |
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| 129 | // tab-width: 4 // |
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| 130 | // mode: c++ // |
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| 131 | // compile-command: "make install" // |
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| 132 | // End: // |
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