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1
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2 // Compiler implementation of the D programming language
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3 // Copyright (c) 1999-2006 by Digital Mars
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4 // All Rights Reserved
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5 // written by Walter Bright
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6 // http://www.digitalmars.com
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7 // License for redistribution is by either the Artistic License
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8 // in artistic.txt, or the GNU General Public License in gnu.txt.
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9 // See the included readme.txt for details.
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10
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11 #ifndef DMD_TEMPLATE_H
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12 #define DMD_TEMPLATE_H
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13
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14 #ifdef __DMC__
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15 #pragma once
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16 #endif /* __DMC__ */
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17
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18 #include "root.h"
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19 #include "arraytypes.h"
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20 #include "dsymbol.h"
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21 #include "mtype.h"
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22
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23
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24 struct OutBuffer;
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25 struct Identifier;
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26 struct TemplateInstance;
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27 struct TemplateParameter;
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28 struct TemplateTypeParameter;
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29 struct TemplateValueParameter;
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30 struct TemplateAliasParameter;
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31 struct TemplateTupleParameter;
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32 struct Type;
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33 struct TypeTypeof;
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34 struct Scope;
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35 struct Expression;
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36 struct AliasDeclaration;
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37 struct FuncDeclaration;
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38 struct HdrGenState;
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39 enum MATCH;
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40
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41 struct Tuple : Object
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42 {
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43 Objects objects;
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44
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45 int dyncast() { return DYNCAST_TUPLE; } // kludge for template.isType()
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46 };
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47
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48
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49 struct TemplateDeclaration : ScopeDsymbol
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50 {
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51 TemplateParameters *parameters; // array of TemplateParameter's
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52 Array instances; // array of TemplateInstance's
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53
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54 TemplateDeclaration *overnext; // next overloaded TemplateDeclaration
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55 TemplateDeclaration *overroot; // first in overnext list
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56
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57 Scope *scope;
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58 Dsymbol *onemember; // if !=NULL then one member of this template
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59
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60 TemplateDeclaration(Loc loc, Identifier *id, TemplateParameters *parameters, Array *decldefs);
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61 Dsymbol *syntaxCopy(Dsymbol *);
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62 void semantic(Scope *sc);
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63 int overloadInsert(Dsymbol *s);
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64 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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65 char *kind();
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66 char *toChars();
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67
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68 void emitComment(Scope *sc);
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69 // void toDocBuffer(OutBuffer *buf);
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70
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71 MATCH matchWithInstance(TemplateInstance *ti, Objects *atypes, int flag);
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72 int leastAsSpecialized(TemplateDeclaration *td2);
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73
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74 MATCH deduceMatch(Objects *targsi, Expressions *fargs, Objects *dedargs);
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75 FuncDeclaration *deduce(Scope *sc, Loc loc, Objects *targsi, Expressions *fargs);
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76 void declareParameter(Scope *sc, TemplateParameter *tp, Object *o);
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77
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78 TemplateDeclaration *isTemplateDeclaration() { return this; }
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79
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80 TemplateTupleParameter *isVariadic();
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81 };
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82
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83 struct TemplateParameter
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84 {
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85 /* For type-parameter:
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86 * template Foo(ident) // specType is set to NULL
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87 * template Foo(ident : specType)
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88 * For value-parameter:
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89 * template Foo(valType ident) // specValue is set to NULL
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90 * template Foo(valType ident : specValue)
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91 * For alias-parameter:
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92 * template Foo(alias ident)
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93 */
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94
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95 Loc loc;
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96 Identifier *ident;
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97
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98 Declaration *sparam;
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99
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100 TemplateParameter(Loc loc, Identifier *ident);
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101
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102 virtual TemplateTypeParameter *isTemplateTypeParameter();
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103 virtual TemplateValueParameter *isTemplateValueParameter();
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104 virtual TemplateAliasParameter *isTemplateAliasParameter();
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105 virtual TemplateTupleParameter *isTemplateTupleParameter();
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106
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107 virtual TemplateParameter *syntaxCopy() = 0;
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108 virtual void declareParameter(Scope *sc) = 0;
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109 virtual void semantic(Scope *) = 0;
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110 virtual void print(Object *oarg, Object *oded) = 0;
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111 virtual void toCBuffer(OutBuffer *buf, HdrGenState *hgs) = 0;
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112 virtual Object *specialization() = 0;
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113 virtual Object *defaultArg(Scope *sc) = 0;
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114
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115 /* If TemplateParameter's match as far as overloading goes.
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116 */
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117 virtual int overloadMatch(TemplateParameter *) = 0;
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118
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119 /* Match actual argument against parameter.
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120 */
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121 virtual MATCH matchArg(Scope *sc, Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, Declaration **psparam) = 0;
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122
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123 /* Create dummy argument based on parameter.
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124 */
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125 virtual void *dummyArg() = 0;
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126 };
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127
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128 struct TemplateTypeParameter : TemplateParameter
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129 {
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130 /* Syntax:
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131 * ident : specType = defaultType
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132 */
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133 Type *specType; // type parameter: if !=NULL, this is the type specialization
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134 Type *defaultType;
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135
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136 TemplateTypeParameter(Loc loc, Identifier *ident, Type *specType, Type *defaultType);
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137
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138 TemplateTypeParameter *isTemplateTypeParameter();
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139 TemplateParameter *syntaxCopy();
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140 void declareParameter(Scope *sc);
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141 void semantic(Scope *);
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142 void print(Object *oarg, Object *oded);
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143 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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144 Object *specialization();
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145 Object *defaultArg(Scope *sc);
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146 int overloadMatch(TemplateParameter *);
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147 MATCH matchArg(Scope *sc, Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, Declaration **psparam);
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148 void *dummyArg();
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149 };
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150
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151 struct TemplateValueParameter : TemplateParameter
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152 {
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153 /* Syntax:
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154 * valType ident : specValue = defaultValue
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155 */
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156
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157 Type *valType;
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158 Expression *specValue;
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159 Expression *defaultValue;
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160
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161 static Expression *edummy;
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162
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163 TemplateValueParameter(Loc loc, Identifier *ident, Type *valType, Expression *specValue, Expression *defaultValue);
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164
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165 TemplateValueParameter *isTemplateValueParameter();
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166 TemplateParameter *syntaxCopy();
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167 void declareParameter(Scope *sc);
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168 void semantic(Scope *);
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169 void print(Object *oarg, Object *oded);
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170 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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171 Object *specialization();
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172 Object *defaultArg(Scope *sc);
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173 int overloadMatch(TemplateParameter *);
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174 MATCH matchArg(Scope *sc, Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, Declaration **psparam);
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175 void *dummyArg();
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176 };
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177
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178 struct TemplateAliasParameter : TemplateParameter
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179 {
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180 /* Syntax:
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181 * ident : specAlias = defaultAlias
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182 */
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183
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184 Type *specAliasT;
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185 Dsymbol *specAlias;
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186
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187 Type *defaultAlias;
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188
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189 static Dsymbol *sdummy;
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190
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191 TemplateAliasParameter(Loc loc, Identifier *ident, Type *specAliasT, Type *defaultAlias);
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192
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193 TemplateAliasParameter *isTemplateAliasParameter();
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194 TemplateParameter *syntaxCopy();
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195 void declareParameter(Scope *sc);
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196 void semantic(Scope *);
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197 void print(Object *oarg, Object *oded);
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198 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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199 Object *specialization();
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200 Object *defaultArg(Scope *sc);
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201 int overloadMatch(TemplateParameter *);
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202 MATCH matchArg(Scope *sc, Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, Declaration **psparam);
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203 void *dummyArg();
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204 };
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205
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206 struct TemplateTupleParameter : TemplateParameter
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207 {
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208 /* Syntax:
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209 * ident ...
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210 */
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211
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212 TemplateTupleParameter(Loc loc, Identifier *ident);
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213
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214 TemplateTupleParameter *isTemplateTupleParameter();
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215 TemplateParameter *syntaxCopy();
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216 void declareParameter(Scope *sc);
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217 void semantic(Scope *);
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218 void print(Object *oarg, Object *oded);
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219 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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220 Object *specialization();
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221 Object *defaultArg(Scope *sc);
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222 int overloadMatch(TemplateParameter *);
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223 MATCH matchArg(Scope *sc, Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, Declaration **psparam);
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224 void *dummyArg();
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225 };
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226
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227 struct TemplateInstance : ScopeDsymbol
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228 {
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229 /* Given:
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230 * foo!(args) =>
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231 * name = foo
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232 * tiargs = args
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233 */
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234 Identifier *name;
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235 //Array idents;
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236 Objects *tiargs; // Array of Types/Expressions of template
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237 // instance arguments [int*, char, 10*10]
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238
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239 Objects tdtypes; // Array of Types/Expressions corresponding
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240 // to TemplateDeclaration.parameters
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241 // [int, char, 100]
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242
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243 TemplateDeclaration *tempdecl; // referenced by foo.bar.abc
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244 TemplateInstance *inst; // refer to existing instance
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245 ScopeDsymbol *argsym; // argument symbol table
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246 AliasDeclaration *aliasdecl; // !=NULL if instance is an alias for its
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247 // sole member
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248 WithScopeSymbol *withsym; // if a member of a with statement
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249 int semanticdone; // has semantic() been done?
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250 int nest; // for recursion detection
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251 int havetempdecl; // 1 if used second constructor
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252 Dsymbol *isnested; // if referencing local symbols, this is the context
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253 int errors; // 1 if compiled with errors
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254 #ifdef IN_GCC
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255 /* On some targets, it is necessary to know whether a symbol
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256 will be emitted in the output or not before the symbol
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257 is used. This can be different from getModule(). */
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258 Module * objFileModule;
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259 #endif
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260
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261 TemplateInstance(Loc loc, Identifier *temp_id);
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262 TemplateInstance(Loc loc, TemplateDeclaration *tempdecl, Objects *tiargs);
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263 static Objects *arraySyntaxCopy(Objects *objs);
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264 Dsymbol *syntaxCopy(Dsymbol *);
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265 void semantic(Scope *sc);
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266 void semantic2(Scope *sc);
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267 void semantic3(Scope *sc);
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268 void inlineScan();
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269 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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270 Dsymbol *toAlias(); // resolve real symbol
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271 char *kind();
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272 int oneMember(Dsymbol **ps);
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273 char *toChars();
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274 char *mangle();
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275
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276 void toObjFile(); // compile to .obj file
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277
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278 // Internal
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279 static void semanticTiargs(Loc loc, Scope *sc, Objects *tiargs);
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280 void semanticTiargs(Scope *sc);
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281 TemplateDeclaration *findTemplateDeclaration(Scope *sc);
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282 TemplateDeclaration *findBestMatch(Scope *sc);
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283 void declareParameters(Scope *sc);
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284 int isNested(Objects *tiargs);
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285 Identifier *genIdent();
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286
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287 TemplateInstance *isTemplateInstance() { return this; }
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288 AliasDeclaration *isAliasDeclaration();
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289 };
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290
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291 struct TemplateMixin : TemplateInstance
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292 {
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293 Array *idents;
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294 Type *tqual;
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295
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296 Scope *scope; // for forward referencing
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297
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298 TemplateMixin(Loc loc, Identifier *ident, Type *tqual, Array *idents, Objects *tiargs);
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299 Dsymbol *syntaxCopy(Dsymbol *s);
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300 void semantic(Scope *sc);
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301 void semantic2(Scope *sc);
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302 void semantic3(Scope *sc);
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303 void inlineScan();
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304 char *kind();
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305 int oneMember(Dsymbol **ps);
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306 int hasPointers();
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307 char *toChars();
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308 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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309
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310 void toObjFile(); // compile to .obj file
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311
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312 TemplateMixin *isTemplateMixin() { return this; }
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313 };
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314
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315 Expression *isExpression(Object *o);
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316 Dsymbol *isDsymbol(Object *o);
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317 Type *isType(Object *o);
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318 Tuple *isTuple(Object *o);
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319 Type *getType(Object *o);
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320 Dsymbol *getDsymbol(Object *o);
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321
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322 void ObjectToCBuffer(OutBuffer *buf, HdrGenState *hgs, Object *oarg);
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323
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324 #endif /* DMD_TEMPLATE_H */
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