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72
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1 module dmd.AndAndExp;
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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.InterState;
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6 import dmd.Loc;
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7 import dmd.Scope;
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0
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8 import dmd.IRState;
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9 import dmd.CommaExp;
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10 import dmd.Global;
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72
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11 import dmd.BoolExp;
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12 import dmd.BinExp;
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0
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13 import dmd.TOK;
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14 import dmd.WANT;
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15 import dmd.IntegerExp;
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16 import dmd.Type;
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72
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17 import dmd.TY;
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18
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0
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19 import dmd.backend.elem;
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20 import dmd.backend.OPER;
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72
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21 import dmd.backend.Util;
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22
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0
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23 class AndAndExp : BinExp
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24 {
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25 this(Loc loc, Expression e1, Expression e2)
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26 {
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178
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27 register();
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0
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28 super(loc, TOK.TOKandand, AndAndExp.sizeof, e1, e2);
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29 }
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30
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72
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31 override Expression semantic(Scope sc)
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32 {
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33 uint cs1;
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34
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35 // same as for OrOr
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36 e1 = e1.semantic(sc);
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37 e1 = resolveProperties(sc, e1);
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38 e1 = e1.checkToPointer();
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39 e1 = e1.checkToBoolean();
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40 cs1 = sc.callSuper;
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41
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42 if (sc.flags & SCOPE.SCOPEstaticif)
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43 {
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44 /* If in static if, don't evaluate e2 if we don't have to.
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45 */
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46 e1 = e1.optimize(WANTflags);
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47 if (e1.isBool(false))
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48 {
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49 return new IntegerExp(loc, 0, Type.tboolean);
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50 }
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51 }
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52
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53 e2 = e2.semantic(sc);
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54 sc.mergeCallSuper(loc, cs1);
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55 e2 = resolveProperties(sc, e2);
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56 e2 = e2.checkToPointer();
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57
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58 type = Type.tboolean;
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59 if (e2.type.ty == Tvoid)
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60 type = Type.tvoid;
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61 if (e2.op == TOKtype || e2.op == TOKimport)
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62 error("%s is not an expression", e2.toChars());
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63 return this;
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64 }
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65
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66 override Expression checkToBoolean()
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67 {
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68 e2 = e2.checkToBoolean();
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69 return this;
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70 }
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71
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72
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72 override int isBit()
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0
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73 {
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74 assert(false);
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75 }
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76
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72
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77 override Expression optimize(int result)
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0
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78 {
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79 //printf("AndAndExp::optimize(%d) %s\n", result, toChars());
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80 e1 = e1.optimize(WANTflags | (result & WANTinterpret));
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81 Expression e = this;
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82 if (e1.isBool(false))
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83 {
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84 e = new CommaExp(loc, e1, new IntegerExp(loc, 0, type));
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85 e.type = type;
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86 e = e.optimize(result);
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87 }
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88 else
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89 {
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90 e2 = e2.optimize(WANTflags | (result & WANTinterpret));
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91 if (result && e2.type.toBasetype().ty == Tvoid && !global.errors)
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92 error("void has no value");
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93
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94 if (e1.isConst())
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95 {
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96 if (e2.isConst())
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97 {
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98 int n1 = e1.isBool(1);
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99 int n2 = e2.isBool(1);
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100
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101 e = new IntegerExp(loc, n1 && n2, type);
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102 }
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103 else if (e1.isBool(true))
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104 e = new BoolExp(loc, e2, type);
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105 }
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106 }
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107 return e;
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108 }
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109
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72
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110 override Expression interpret(InterState istate)
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0
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111 {
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112 assert(false);
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113 }
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114
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72
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115 override bool checkSideEffect(int flag)
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0
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116 {
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117 assert(false);
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118 }
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119
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72
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120 override elem* toElem(IRState* irs)
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0
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121 {
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122 elem* e = toElemBin(irs, OPandand);
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123 if (global.params.cov && e2.loc.linnum)
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124 e.E2() = el_combine(incUsageElem(irs, e2.loc), e.E2);
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125 return e;
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126 }
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127 }
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128
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