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72
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1 module dmd.ArrayLengthExp;
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2
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3 import dmd.Expression;
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4 import dmd.backend.elem;
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5 import dmd.UnaExp;
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6 import dmd.InterState;
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7 import dmd.OutBuffer;
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8 import dmd.Loc;
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9 import dmd.Scope;
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10 import dmd.IRState;
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11 import dmd.HdrGenState;
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0
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12 import dmd.TOK;
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13 import dmd.Type;
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14 import dmd.WANT;
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15
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16 import dmd.expression.ArrayLength;
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17
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18 import dmd.backend.Util;
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72
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19 import dmd.backend.OPER;
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20
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0
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21 class ArrayLengthExp : UnaExp
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22 {
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23 this(Loc loc, Expression e1)
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24 {
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25 super(loc, TOK.TOKarraylength, ArrayLengthExp.sizeof, e1);
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26 }
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27
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72
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28 override Expression semantic(Scope sc)
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0
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29 {
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30 Expression e;
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31
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32 version (LOGSEMANTIC) {
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33 printf("ArrayLengthExp::semantic('%s')\n", toChars());
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34 }
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35 if (!type)
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36 {
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37 UnaExp.semantic(sc);
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38 e1 = resolveProperties(sc, e1);
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39
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40 type = Type.tsize_t;
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41 }
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42 return this;
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43 }
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44
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72
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45 override Expression optimize(int result)
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0
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46 {
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47 //printf("ArrayLengthExp::optimize(result = %d) %s\n", result, toChars());
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48 e1 = e1.optimize(WANTvalue | (result & WANTinterpret));
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49 Expression e = this;
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50 if (e1.op == TOKstring || e1.op == TOKarrayliteral || e1.op == TOKassocarrayliteral)
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51 {
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52 e = ArrayLength(type, e1);
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53 }
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54 return e;
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55 }
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56
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72
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57 override Expression interpret(InterState istate)
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0
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58 {
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59 assert(false);
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60 }
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61
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72
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62 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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0
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63 {
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64 assert(false);
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65 }
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66
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72
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67 override elem* toElem(IRState* irs)
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68 {
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69 elem *e = e1.toElem(irs);
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70 e = el_una(OP64_32, type.totym(), e);
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71 el_setLoc(e,loc);
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72 return e;
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73 }
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74 }
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75
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