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