source: src/AST/Init.hpp @ 89c2f7c9

arm-ehcleanup-dtorsenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum
Last change on this file since 89c2f7c9 was 89c2f7c9, checked in by Aaron Moss <a3moss@…>, 4 years ago

Merge branch 'master' of plg.uwaterloo.ca:software/cfa/cfa-cc

  • Property mode set to 100644
File size: 5.3 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// Init.hpp --
8//
9// Author           : Aaron B. Moss
10// Created On       : Fri May 10 10:30:00 2019
11// Last Modified By : Aaron B. Moss
12// Created On       : Fri May 10 10:30:00 2019
13// Update Count     : 1
14//
15
16#pragma once
17
18#include <utility>        // for move
19#include <vector>
20
21#include "ParseNode.hpp"
22#include "Node.hpp"       // for ptr
23#include "Visitor.hpp"
24
25namespace ast {
26
27class Expr;
28class Stmt;
29
30/// List of designator (NameExpr, VariableExpr, and ConstantExpr) expressions that specify an
31/// object being initialized
32class Designation final : public ParseNode {
33public:
34        std::vector<ptr<Expr>> designators;
35
36        Designation( const CodeLocation& loc, std::vector<ptr<Expr>>&& ds = {} )
37        : ParseNode( loc ), designators( std::move(ds) ) {}
38
39        const Designation* accept( Visitor& v ) const override { return v.visit( this ); }
40private:
41        Designation* clone() const override { return new Designation{ *this }; }
42};
43
44/// Flag for whether to construct from initialzier
45enum ConstructFlag { DoConstruct, MaybeConstruct };
46
47/// Object initializer base class
48class Init : public ParseNode {
49public:
50        ConstructFlag maybeConstructed;
51
52        Init( const CodeLocation& loc, ConstructFlag mc ) : ParseNode( loc ), maybeConstructed( mc ) {}
53
54        const Init * accept( Visitor& v ) const override = 0;
55private:
56        const Init * clone() const override = 0;
57};
58
59/// Initializer for a common object: `int x = 4`
60class SingleInit final : public Init {
61public:
62        /// value to initialize to. Must be compile-time constant.
63        ptr<Expr> value;
64
65        SingleInit( const CodeLocation& loc, Expr* val, ConstructFlag mc = DoConstruct )
66        : Init( loc, mc ), value( val ) {}
67
68        const Init * accept( Visitor & v ) const override { return v.visit( this ); }
69private:
70        SingleInit * clone() const override { return new SingleInit{ *this }; }
71
72        /// Must be copied in ALL derived classes
73        template<typename node_t>
74        friend auto mutate(const node_t * node);
75};
76
77/// Initializer recursively composed of a list of initializers.
78/// Used to initialize an array or aggregate: `int a[] = { 1, 2, 3 }`
79class ListInit final : public Init {
80public:
81        /// list of initializers
82        std::vector<ptr<Init>> initializers;
83        /// list of designators; order/length is consistent with initializers
84        std::vector<ptr<Designation>> designations;
85
86        ListInit( const CodeLocation& loc, std::vector<ptr<Init>>&& is,
87                std::vector<ptr<Designation>>&& ds = {}, ConstructFlag mc = DoConstruct );
88
89        using iterator = std::vector<ptr<Init>>::iterator;
90        using const_iterator = std::vector<ptr<Init>>::const_iterator;
91        iterator begin() { return initializers.begin(); }
92        iterator end() { return initializers.end(); }
93        const_iterator begin() const { return initializers.begin(); }
94        const_iterator end() const { return initializers.end(); }
95
96        const Init * accept( Visitor & v ) const override { return v.visit( this ); }
97private:
98        ListInit * clone() const override { return new ListInit{ *this }; }
99
100        /// Must be copied in ALL derived classes
101        template<typename node_t>
102        friend auto mutate(const node_t * node);
103};
104
105/// Either a constructor expression or a C-style initializer.
106/// Should not be necessary to create manually; instead set `maybeConstructed` true on `SingleInit`
107/// or `ListInit` if the object should be constructed.
108class ConstructorInit final : public Init {
109public:
110        ptr<Stmt> ctor;
111        ptr<Stmt> dtor;
112        /// C-style initializer made up of SingleInit/ListInit nodes to use as a fallback if an
113        /// appropriate constructor definition is not found by the resolver.
114        ptr<Init> init;
115
116        ConstructorInit( const CodeLocation& loc, Stmt* ctor, Stmt* dtor, Init* init )
117        : Init( loc, DoConstruct ), ctor( ctor ), dtor( dtor ), init( init ) {}
118
119        const Init * accept( Visitor & v ) const override { return v.visit( this ); }
120private:
121        ConstructorInit * clone() const override { return new ConstructorInit{ *this }; }
122
123        /// Must be copied in ALL derived classes
124        template<typename node_t>
125        friend auto mutate(const node_t * node);
126};
127
128
129//=================================================================================================
130/// This disgusting and giant piece of boiler-plate is here to solve a cyclic dependency
131/// remove only if there is a better solution
132/// The problem is that ast::ptr< ... > uses increment/decrement which won't work well with
133/// forward declarations
134inline void increment( const class Init * node, Node::ref_type ref ) { node->increment( ref ); }
135inline void decrement( const class Init * node, Node::ref_type ref ) { node->decrement( ref ); }
136inline void increment( const class SingleInit * node, Node::ref_type ref ) { node->increment( ref ); }
137inline void decrement( const class SingleInit * node, Node::ref_type ref ) { node->decrement( ref ); }
138inline void increment( const class ListInit * node, Node::ref_type ref ) { node->increment( ref ); }
139inline void decrement( const class ListInit * node, Node::ref_type ref ) { node->decrement( ref ); }
140inline void increment( const class ConstructorInit * node, Node::ref_type ref ) { node->increment( ref ); }
141inline void decrement( const class ConstructorInit * node, Node::ref_type ref ) { node->decrement( ref ); }
142}
143
144// Local Variables: //
145// tab-width: 4 //
146// mode: c++ //
147// compile-command: "make install" //
148// End: //
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