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72
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1 module dmd.SuperExp;
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2
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114
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3 import dmd.common;
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72
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4 import dmd.Expression;
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5 import dmd.OutBuffer;
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6 import dmd.Loc;
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7 import dmd.Scope;
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8 import dmd.InlineCostState;
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0
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9 import dmd.InlineDoState;
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10 import dmd.FuncDeclaration;
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11 import dmd.ClassDeclaration;
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72
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12 import dmd.Dsymbol;
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13 import dmd.HdrGenState;
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14 import dmd.ThisExp;
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0
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15 import dmd.TOK;
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16 import dmd.CSX;
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72
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17 import dmd.Type;
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18
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0
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19 class SuperExp : ThisExp
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20 {
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21 this(Loc loc)
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22 {
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23 super(loc);
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24 op = TOK.TOKsuper;
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25 }
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26
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72
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27 override Expression semantic(Scope sc)
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0
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28 {
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29 FuncDeclaration fd;
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30 FuncDeclaration fdthis;
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31
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32 version (LOGSEMANTIC) {
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33 printf("SuperExp.semantic('%s')\n", toChars());
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34 }
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35 if (type)
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36 return this;
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37
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38 /* Special case for typeof(this) and typeof(super) since both
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39 * should work even if they are not inside a non-static member function
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40 */
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41 if (sc.intypeof)
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42 {
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43 // Find enclosing class
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44 for (Dsymbol s = sc.parent; 1; s = s.parent)
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45 {
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46 ClassDeclaration cd;
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47
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48 if (!s)
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49 {
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50 error("%s is not in a class scope", toChars());
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51 goto Lerr;
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52 }
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53 cd = s.isClassDeclaration();
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54 if (cd)
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55 {
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56 cd = cd.baseClass;
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57 if (!cd)
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58 {
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59 error("class %s has no 'super'", s.toChars());
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60 goto Lerr;
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61 }
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62 type = cd.type;
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63 return this;
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64 }
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65 }
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66 }
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67
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68 fdthis = sc.parent.isFuncDeclaration();
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69 fd = hasThis(sc);
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70 if (!fd)
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71 goto Lerr;
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72 assert(fd.vthis);
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73 var = fd.vthis;
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74 assert(var.parent);
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75
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76 Dsymbol s = fd.toParent();
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77 while (s && s.isTemplateInstance())
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78 s = s.toParent();
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79 assert(s);
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80 ClassDeclaration cd = s.isClassDeclaration();
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81 //printf("parent is %s %s\n", fd.toParent().kind(), fd.toParent().toChars());
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82 if (!cd)
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83 goto Lerr;
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84 if (!cd.baseClass)
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85 {
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86 error("no base class for %s", cd.toChars());
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87 type = fd.vthis.type;
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88 }
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89 else
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90 {
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91 type = cd.baseClass.type;
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92 }
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93
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94 var.isVarDeclaration().checkNestedReference(sc, loc);
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95
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96 if (!sc.intypeof)
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97 sc.callSuper |= CSXsuper;
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98 return this;
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99
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100 Lerr:
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101 error("'super' is only allowed in non-static class member functions");
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102 type = Type.tint32;
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103 return this;
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104 }
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105
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72
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106 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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0
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107 {
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58
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108 buf.writestring("super");
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0
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109 }
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110
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72
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111 override void scanForNestedRef(Scope sc)
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0
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112 {
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113 assert(false);
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114 }
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115
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72
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116 override int inlineCost(InlineCostState* ics)
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0
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117 {
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118 assert(false);
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119 }
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120
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72
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121 override Expression doInline(InlineDoState ids)
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0
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122 {
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123 assert(false);
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124 }
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125 }
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126
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