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annotate dmd/TypeSlice.d @ 8:d42cd5917df4

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wysiwyg strings, alias this, templates, TypeSlice implementation
author dkoroskin <>
date Mon, 14 Dec 2009 17:43:43 +0300
parents 10317f0c89a5
children 38a17310d587
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1 module dmd.TypeSlice;
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2
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3 import dmd.Type;
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4 import dmd.TypeNext;
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5 import dmd.MOD;
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6 import dmd.Expression;
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7 import dmd.Loc;
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8 import dmd.Scope;
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9 import dmd.Dsymbol;
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10 import dmd.OutBuffer;
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11 import dmd.HdrGenState;
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12 import dmd.TY;
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13 import dmd.TypeTuple;
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14 import dmd.WANT;
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15 import dmd.ArrayTypes;
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16 import dmd.Argument;
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17
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18 import dmd.type.Util;
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19
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20 class TypeSlice : TypeNext
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21 {
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22 Expression lwr;
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23 Expression upr;
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24
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25 this(Type next, Expression lwr, Expression upr)
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26 {
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27 super(TY.Tslice, next);
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28 //printf("TypeSlice[%s .. %s]\n", lwr.toChars(), upr.toChars());
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29 this.lwr = lwr;
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30 this.upr = upr;
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31 }
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32
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33 version (DumbClone) {
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34 } else {
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35 Type clone()
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36 {
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37 assert(false);
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38 }
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39 }
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40
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41 Type syntaxCopy()
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42 {
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43 Type t = new TypeSlice(next.syntaxCopy(), lwr.syntaxCopy(), upr.syntaxCopy());
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44 t.mod = mod;
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45 return t;
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46 }
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47
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48 Type semantic(Loc loc, Scope sc)
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49 {
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50 //printf("TypeSlice.semantic() %s\n", toChars());
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51 next = next.semantic(loc, sc);
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52 transitive();
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53 //printf("next: %s\n", next.toChars());
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54
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55 Type tbn = next.toBasetype();
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56 if (tbn.ty != Ttuple)
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57 {
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58 error(loc, "can only slice tuple types, not %s", tbn.toChars());
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59 return Type.terror;
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60 }
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61 TypeTuple tt = cast(TypeTuple)tbn;
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62
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63 lwr = semanticLength(sc, tbn, lwr);
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64 lwr = lwr.optimize(WANTvalue);
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65 ulong i1 = lwr.toUInteger();
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66
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67 upr = semanticLength(sc, tbn, upr);
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68 upr = upr.optimize(WANTvalue);
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69 ulong i2 = upr.toUInteger();
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70
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71 if (!(i1 <= i2 && i2 <= tt.arguments.dim))
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72 {
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73 error(loc, "slice [%ju..%ju] is out of range of [0..%u]", i1, i2, tt.arguments.dim);
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74 return Type.terror;
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75 }
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76
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77 Arguments args = new Arguments;
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78 args.reserve(cast(size_t)(i2 - i1));
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79 for (size_t i = cast(size_t)i1; i < cast(size_t)i2; i++)
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80 {
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81 Argument arg = cast(Argument)tt.arguments.data[i];
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82 args.push(cast(void*)arg);
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83 }
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84
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85 return new TypeTuple(args);
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86 }
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87
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88 void resolve(Loc loc, Scope sc, Expression* pe, Type* pt, Dsymbol* ps)
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89 {
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90 assert(false);
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91 }
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92
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93 void toCBuffer2(OutBuffer buf, HdrGenState* hgs, MOD mod)
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94 {
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95 assert(false);
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96 }
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97 }