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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
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53 TemplateParameters *origParameters; // originals for Ddoc
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54
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55 Array instances; // array of TemplateInstance's
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56
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57 TemplateDeclaration *overnext; // next overloaded TemplateDeclaration
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58 TemplateDeclaration *overroot; // first in overnext list
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59
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60 Scope *scope;
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61 Dsymbol *onemember; // if !=NULL then one member of this template
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62
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63 TemplateDeclaration(Loc loc, Identifier *id, TemplateParameters *parameters, Array *decldefs);
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64 Dsymbol *syntaxCopy(Dsymbol *);
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65 void semantic(Scope *sc);
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66 int overloadInsert(Dsymbol *s);
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67 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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68 char *kind();
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69 char *toChars();
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70
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71 void emitComment(Scope *sc);
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72 // void toDocBuffer(OutBuffer *buf);
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73
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74 MATCH matchWithInstance(TemplateInstance *ti, Objects *atypes, int flag);
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75 int leastAsSpecialized(TemplateDeclaration *td2);
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76
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77 MATCH deduceFunctionTemplateMatch(Objects *targsi, Expressions *fargs, Objects *dedargs);
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78 FuncDeclaration *deduceFunctionTemplate(Scope *sc, Loc loc, Objects *targsi, Expressions *fargs);
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79 void declareParameter(Scope *sc, TemplateParameter *tp, Object *o);
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80
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81 TemplateDeclaration *isTemplateDeclaration() { return this; }
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82
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83 TemplateTupleParameter *isVariadic();
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84 int isOverloadable();
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85 };
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86
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87 struct TemplateParameter
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88 {
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89 /* For type-parameter:
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90 * template Foo(ident) // specType is set to NULL
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91 * template Foo(ident : specType)
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92 * For value-parameter:
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93 * template Foo(valType ident) // specValue is set to NULL
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94 * template Foo(valType ident : specValue)
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95 * For alias-parameter:
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96 * template Foo(alias ident)
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97 */
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98
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99 Loc loc;
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100 Identifier *ident;
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101
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102 Declaration *sparam;
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103
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104 TemplateParameter(Loc loc, Identifier *ident);
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105
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106 virtual TemplateTypeParameter *isTemplateTypeParameter();
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107 virtual TemplateValueParameter *isTemplateValueParameter();
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108 virtual TemplateAliasParameter *isTemplateAliasParameter();
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109 virtual TemplateTupleParameter *isTemplateTupleParameter();
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110
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111 virtual TemplateParameter *syntaxCopy() = 0;
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112 virtual void declareParameter(Scope *sc) = 0;
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113 virtual void semantic(Scope *) = 0;
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114 virtual void print(Object *oarg, Object *oded) = 0;
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115 virtual void toCBuffer(OutBuffer *buf, HdrGenState *hgs) = 0;
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116 virtual Object *specialization() = 0;
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117 virtual Object *defaultArg(Scope *sc) = 0;
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118
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119 /* If TemplateParameter's match as far as overloading goes.
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120 */
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121 virtual int overloadMatch(TemplateParameter *) = 0;
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122
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123 /* Match actual argument against parameter.
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124 */
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125 virtual MATCH matchArg(Scope *sc, Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, Declaration **psparam) = 0;
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126
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127 /* Create dummy argument based on parameter.
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128 */
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129 virtual void *dummyArg() = 0;
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130 };
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131
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132 struct TemplateTypeParameter : TemplateParameter
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133 {
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134 /* Syntax:
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135 * ident : specType = defaultType
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136 */
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137 Type *specType; // type parameter: if !=NULL, this is the type specialization
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138 Type *defaultType;
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139
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140 TemplateTypeParameter(Loc loc, Identifier *ident, Type *specType, Type *defaultType);
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141
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142 TemplateTypeParameter *isTemplateTypeParameter();
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143 TemplateParameter *syntaxCopy();
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144 void declareParameter(Scope *sc);
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145 void semantic(Scope *);
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146 void print(Object *oarg, Object *oded);
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147 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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148 Object *specialization();
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149 Object *defaultArg(Scope *sc);
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150 int overloadMatch(TemplateParameter *);
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151 MATCH matchArg(Scope *sc, Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, Declaration **psparam);
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152 void *dummyArg();
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153 };
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154
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155 struct TemplateValueParameter : TemplateParameter
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156 {
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157 /* Syntax:
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158 * valType ident : specValue = defaultValue
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159 */
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160
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161 Type *valType;
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162 Expression *specValue;
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163 Expression *defaultValue;
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164
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165 static Expression *edummy;
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166
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167 TemplateValueParameter(Loc loc, Identifier *ident, Type *valType, Expression *specValue, Expression *defaultValue);
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168
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169 TemplateValueParameter *isTemplateValueParameter();
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170 TemplateParameter *syntaxCopy();
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171 void declareParameter(Scope *sc);
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172 void semantic(Scope *);
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173 void print(Object *oarg, Object *oded);
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174 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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175 Object *specialization();
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176 Object *defaultArg(Scope *sc);
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177 int overloadMatch(TemplateParameter *);
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178 MATCH matchArg(Scope *sc, Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, Declaration **psparam);
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179 void *dummyArg();
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180 };
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181
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182 struct TemplateAliasParameter : TemplateParameter
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183 {
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184 /* Syntax:
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185 * ident : specAlias = defaultAlias
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186 */
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187
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188 Type *specAliasT;
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189 Dsymbol *specAlias;
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190
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191 Type *defaultAlias;
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192
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193 static Dsymbol *sdummy;
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194
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195 TemplateAliasParameter(Loc loc, Identifier *ident, Type *specAliasT, Type *defaultAlias);
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196
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197 TemplateAliasParameter *isTemplateAliasParameter();
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198 TemplateParameter *syntaxCopy();
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199 void declareParameter(Scope *sc);
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200 void semantic(Scope *);
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201 void print(Object *oarg, Object *oded);
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202 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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203 Object *specialization();
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204 Object *defaultArg(Scope *sc);
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205 int overloadMatch(TemplateParameter *);
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206 MATCH matchArg(Scope *sc, Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, Declaration **psparam);
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207 void *dummyArg();
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208 };
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209
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210 struct TemplateTupleParameter : TemplateParameter
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211 {
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212 /* Syntax:
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213 * ident ...
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214 */
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215
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216 TemplateTupleParameter(Loc loc, Identifier *ident);
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217
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218 TemplateTupleParameter *isTemplateTupleParameter();
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219 TemplateParameter *syntaxCopy();
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220 void declareParameter(Scope *sc);
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221 void semantic(Scope *);
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222 void print(Object *oarg, Object *oded);
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223 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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224 Object *specialization();
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225 Object *defaultArg(Scope *sc);
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226 int overloadMatch(TemplateParameter *);
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227 MATCH matchArg(Scope *sc, Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, Declaration **psparam);
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228 void *dummyArg();
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229 };
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230
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231 struct TemplateInstance : ScopeDsymbol
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232 {
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233 /* Given:
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234 * foo!(args) =>
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235 * name = foo
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236 * tiargs = args
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237 */
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238 Identifier *name;
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239 //Array idents;
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240 Objects *tiargs; // Array of Types/Expressions of template
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241 // instance arguments [int*, char, 10*10]
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242
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243 Objects tdtypes; // Array of Types/Expressions corresponding
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244 // to TemplateDeclaration.parameters
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245 // [int, char, 100]
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246
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247 TemplateDeclaration *tempdecl; // referenced by foo.bar.abc
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248 TemplateInstance *inst; // refer to existing instance
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249 ScopeDsymbol *argsym; // argument symbol table
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250 AliasDeclaration *aliasdecl; // !=NULL if instance is an alias for its
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251 // sole member
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252 WithScopeSymbol *withsym; // if a member of a with statement
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253 int semanticdone; // has semantic() been done?
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254 int nest; // for recursion detection
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255 int havetempdecl; // 1 if used second constructor
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256 Dsymbol *isnested; // if referencing local symbols, this is the context
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257 int errors; // 1 if compiled with errors
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258 #ifdef IN_GCC
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259 /* On some targets, it is necessary to know whether a symbol
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260 will be emitted in the output or not before the symbol
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261 is used. This can be different from getModule(). */
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262 Module * objFileModule;
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263 #endif
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264
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265 TemplateInstance(Loc loc, Identifier *temp_id);
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266 TemplateInstance(Loc loc, TemplateDeclaration *tempdecl, Objects *tiargs);
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267 static Objects *arraySyntaxCopy(Objects *objs);
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268 Dsymbol *syntaxCopy(Dsymbol *);
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269 void semantic(Scope *sc);
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270 void semantic2(Scope *sc);
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271 void semantic3(Scope *sc);
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272 void inlineScan();
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273 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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274 Dsymbol *toAlias(); // resolve real symbol
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275 char *kind();
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276 int oneMember(Dsymbol **ps);
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277 char *toChars();
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278 char *mangle();
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279
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280 void toObjFile(); // compile to .obj file
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281
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282 // Internal
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283 static void semanticTiargs(Loc loc, Scope *sc, Objects *tiargs);
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284 void semanticTiargs(Scope *sc);
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285 TemplateDeclaration *findTemplateDeclaration(Scope *sc);
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286 TemplateDeclaration *findBestMatch(Scope *sc);
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287 void declareParameters(Scope *sc);
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288 int isNested(Objects *tiargs);
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289 Identifier *genIdent();
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290
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291 TemplateInstance *isTemplateInstance() { return this; }
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292 AliasDeclaration *isAliasDeclaration();
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293 };
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294
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295 struct TemplateMixin : TemplateInstance
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296 {
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297 Array *idents;
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298 Type *tqual;
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299
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300 Scope *scope; // for forward referencing
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301
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302 TemplateMixin(Loc loc, Identifier *ident, Type *tqual, Array *idents, Objects *tiargs);
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303 Dsymbol *syntaxCopy(Dsymbol *s);
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304 void semantic(Scope *sc);
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305 void semantic2(Scope *sc);
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306 void semantic3(Scope *sc);
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307 void inlineScan();
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308 char *kind();
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309 int oneMember(Dsymbol **ps);
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310 int hasPointers();
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311 char *toChars();
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312 void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
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313
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314 void toObjFile(); // compile to .obj file
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315
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316 TemplateMixin *isTemplateMixin() { return this; }
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317 };
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318
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319 Expression *isExpression(Object *o);
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320 Dsymbol *isDsymbol(Object *o);
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321 Type *isType(Object *o);
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322 Tuple *isTuple(Object *o);
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323 Type *getType(Object *o);
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324 Dsymbol *getDsymbol(Object *o);
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325
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326 void ObjectToCBuffer(OutBuffer *buf, HdrGenState *hgs, Object *oarg);
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327
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328 #endif /* DMD_TEMPLATE_H */
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