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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20 | #include <utility> // for move |
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21 | #include <vector> |
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22 | |
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23 | #include "Fwd.hpp" // for UniqueId |
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24 | #include "ParseNode.hpp" |
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25 | #include "Visitor.hpp" |
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26 | |
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27 | namespace ast { |
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28 | |
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29 | /// Contains the ID of a declaration and a type that is derived from that declaration, |
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30 | /// but subject to decay-to-pointer and type parameter renaming |
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31 | struct ParamEntry { |
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32 | UniqueId decl; |
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33 | ptr<Type> actualType; |
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34 | ptr<Type> formalType; |
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35 | ptr<Expr> expr; |
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36 | |
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37 | ParamEntry() : decl( 0 ), actualType( nullptr ), formalType( nullptr ), expr( nullptr ) {} |
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38 | ParamEntry( UniqueId id, Type* actual, Type* formal, Expr* e ) |
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39 | : decl( id ), actualType( actual ), formalType( formal ), expr( e ) {} |
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40 | }; |
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41 | |
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42 | /// Pre-resolution list of parameters to infer |
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43 | using ResnSlots = std::vector<UniqueId>; |
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44 | /// Post-resolution map of inferred parameters |
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45 | using InferredParams = std::map< UniqueId, ParamEntry >; |
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46 | |
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47 | /// Base node for expressions |
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48 | class Expr : public ParseNode { |
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49 | public: |
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50 | /// Saves space (~16 bytes) by combining ResnSlots and InferredParams |
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51 | struct InferUnion { |
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52 | enum { Empty, Slots, Params } mode; |
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53 | union data_t { |
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54 | char def; |
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55 | ResnSlots resnSlots; |
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56 | InferredParams inferParams; |
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57 | |
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58 | data_t() : def('\0') {} |
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59 | ~data_t() {} |
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60 | } data; |
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61 | |
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62 | /// initializes from other InferUnion |
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63 | void init_from( const InferUnion& o ) { |
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64 | switch ( o.mode ) { |
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65 | case Empty: return; |
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66 | case Slots: new(&data.resnSlots) ResnSlots{ o.data.resnSlots }; return; |
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67 | case Params: new(&data.inferParams) InferredParams{ o.data.inferParams }; return; |
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68 | } |
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69 | } |
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70 | |
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71 | /// initializes from other InferUnion (move semantics) |
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72 | void init_from( InferUnion&& o ) { |
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73 | switch ( o.mode ) { |
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74 | case Empty: return; |
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75 | case Slots: new(&data.resnSlots) ResnSlots{ std::move(o.data.resnSlots) }; return; |
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76 | case Params: |
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77 | new(&data.inferParams) InferredParams{ std::move(o.data.inferParams) }; return; |
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78 | } |
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79 | } |
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80 | |
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81 | /// clears variant fields |
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82 | void reset() { |
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83 | switch( mode ) { |
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84 | case Empty: return; |
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85 | case Slots: data.resnSlots.~ResnSlots(); return; |
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86 | case Params: data.inferParams.~InferredParams(); return; |
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87 | } |
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88 | } |
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89 | |
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90 | InferUnion() : mode(Empty), data() {} |
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91 | InferUnion( const InferUnion& o ) : mode( o.mode ), data() { init_from( o ); } |
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92 | InferUnion( InferUnion&& o ) : mode( o.mode ), data() { init_from( std::move(o) ); } |
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93 | InferUnion& operator= ( const InferUnion& ) = delete; |
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94 | InferUnion& operator= ( InferUnion&& ) = delete; |
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95 | ~InferUnion() { reset(); } |
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96 | |
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97 | ResnSlots& resnSlots() { |
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98 | switch (mode) { |
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99 | case Empty: new(&data.resnSlots) ResnSlots{}; mode = Slots; // fallthrough |
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100 | case Slots: return data.resnSlots; |
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101 | case Params: assert(!"Cannot return to resnSlots from Params"); |
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102 | } |
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103 | } |
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104 | |
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105 | InferredParams& inferParams() { |
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106 | switch (mode) { |
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107 | case Slots: data.resnSlots.~ResnSlots(); // fallthrough |
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108 | case Empty: new(&data.inferParams) InferredParams{}; mode = Params; // fallthrough |
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109 | case Params: return data.inferParams; |
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110 | } |
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111 | } |
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112 | }; |
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113 | |
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114 | ptr<Type> result; |
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115 | ptr<TypeSubstitution> env; |
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116 | InferUnion inferred; |
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117 | bool extension = false; |
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118 | |
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119 | Expr(const CodeLocation & loc ) : ParseNode( loc ), result(), env(), inferred() {} |
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120 | |
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121 | Expr * set_extension( bool ex ) { extension = ex; return this; } |
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122 | |
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123 | virtual const Expr * accept( Visitor & v ) const override = 0; |
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124 | private: |
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125 | Expr * clone() const override = 0; |
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126 | }; |
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127 | |
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128 | /// A type used as an expression (e.g. a type generator parameter) |
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129 | class TypeExpr final : public Expr { |
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130 | public: |
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131 | ptr<Type> type; |
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132 | |
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133 | TypeExpr( const CodeLocation & loc, const Type * t ) : Expr(loc), type(t) {} |
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134 | |
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135 | const Expr * accept( Visitor & v ) const override { return v.visit( this ); } |
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136 | private: |
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137 | TypeExpr * clone() const override { return new TypeExpr{ *this }; } |
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138 | }; |
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139 | |
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140 | |
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141 | //================================================================================================= |
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142 | /// This disgusting and giant piece of boiler-plate is here to solve a cyclic dependency |
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143 | /// remove only if there is a better solution |
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144 | /// The problem is that ast::ptr< ... > uses increment/decrement which won't work well with |
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145 | /// forward declarations |
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146 | inline void increment( const class Expr * node, Node::ref_type ref ) { node->increment(ref); } |
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147 | inline void decrement( const class Expr * node, Node::ref_type ref ) { node->decrement(ref); } |
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148 | // inline void increment( const class ApplicationExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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149 | // inline void decrement( const class ApplicationExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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150 | // inline void increment( const class UntypedExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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151 | // inline void decrement( const class UntypedExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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152 | // inline void increment( const class NameExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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153 | // inline void decrement( const class NameExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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154 | // inline void increment( const class AddressExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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155 | // inline void decrement( const class AddressExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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156 | // inline void increment( const class LabelAddressExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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157 | // inline void decrement( const class LabelAddressExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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158 | // inline void increment( const class CastExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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159 | // inline void decrement( const class CastExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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160 | // inline void increment( const class KeywordCastExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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161 | // inline void decrement( const class KeywordCastExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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162 | // inline void increment( const class VirtualCastExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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163 | // inline void decrement( const class VirtualCastExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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164 | // inline void increment( const class MemberExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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165 | // inline void decrement( const class MemberExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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166 | // inline void increment( const class UntypedMemberExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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167 | // inline void decrement( const class UntypedMemberExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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168 | // inline void increment( const class VariableExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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169 | // inline void decrement( const class VariableExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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170 | // inline void increment( const class ConstantExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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171 | // inline void decrement( const class ConstantExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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172 | // inline void increment( const class SizeofExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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173 | // inline void decrement( const class SizeofExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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174 | // inline void increment( const class AlignofExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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175 | // inline void decrement( const class AlignofExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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176 | // inline void increment( const class UntypedOffsetofExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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177 | // inline void decrement( const class UntypedOffsetofExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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178 | // inline void increment( const class OffsetofExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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179 | // inline void decrement( const class OffsetofExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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180 | // inline void increment( const class OffsetPackExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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181 | // inline void decrement( const class OffsetPackExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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182 | // inline void increment( const class AttrExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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183 | // inline void decrement( const class AttrExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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184 | // inline void increment( const class LogicalExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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185 | // inline void decrement( const class LogicalExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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186 | // inline void increment( const class ConditionalExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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187 | // inline void decrement( const class ConditionalExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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188 | // inline void increment( const class CommaExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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189 | // inline void decrement( const class CommaExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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190 | // inline void increment( const class TypeExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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191 | // inline void decrement( const class TypeExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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192 | // inline void increment( const class AsmExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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193 | // inline void decrement( const class AsmExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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194 | // inline void increment( const class ImplicitCopyCtorExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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195 | // inline void decrement( const class ImplicitCopyCtorExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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196 | // inline void increment( const class ConstructorExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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197 | // inline void decrement( const class ConstructorExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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198 | // inline void increment( const class CompoundLiteralExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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199 | // inline void decrement( const class CompoundLiteralExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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200 | // inline void increment( const class UntypedValofExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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201 | // inline void decrement( const class UntypedValofExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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202 | // inline void increment( const class RangeExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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203 | // inline void decrement( const class RangeExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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204 | // inline void increment( const class UntypedTupleExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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205 | // inline void decrement( const class UntypedTupleExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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206 | // inline void increment( const class TupleExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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207 | // inline void decrement( const class TupleExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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208 | // inline void increment( const class TupleIndexExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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209 | // inline void decrement( const class TupleIndexExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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210 | // inline void increment( const class TupleAssignExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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211 | // inline void decrement( const class TupleAssignExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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212 | // inline void increment( const class StmtExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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213 | // inline void decrement( const class StmtExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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214 | // inline void increment( const class UniqueExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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215 | // inline void decrement( const class UniqueExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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216 | // inline void increment( const class UntypedInitExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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217 | // inline void decrement( const class UntypedInitExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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218 | // inline void increment( const class InitExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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219 | // inline void decrement( const class InitExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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220 | // inline void increment( const class DeletedExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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221 | // inline void decrement( const class DeletedExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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222 | // inline void increment( const class DefaultArgExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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223 | // inline void decrement( const class DefaultArgExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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224 | // inline void increment( const class GenericExpr * node, Node::ref_type ref ) { node->increment(ref); } |
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225 | // inline void decrement( const class GenericExpr * node, Node::ref_type ref ) { node->decrement(ref); } |
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226 | } |
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227 | |
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228 | // Local Variables: // |
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229 | // tab-width: 4 // |
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230 | // mode: c++ // |
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231 | // compile-command: "make install" // |
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232 | // End: // |
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