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1 module dmd.DeclarationStatement;
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2
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3 import dmd.Loc;
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4 import dmd.ExpStatement;
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5 import dmd.Dsymbol;
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6 import dmd.Expression;
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7 import dmd.Statement;
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8 import dmd.OutBuffer;
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9 import dmd.HdrGenState;
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10 import dmd.Scope;
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11 import dmd.DeclarationExp;
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12 import dmd.TOK;
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13 import dmd.VarDeclaration;
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14
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15 class DeclarationStatement : ExpStatement
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16 {
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17 // Doing declarations as an expression, rather than a statement,
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18 // makes inlining functions much easier.
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19
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20 this(Loc loc, Dsymbol declaration)
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21 {
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22 super(loc, new DeclarationExp(loc, declaration));
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23 }
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24
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25 this(Loc loc, Expression exp)
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26 {
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27 super(loc, exp);
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28 }
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29
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30 Statement syntaxCopy()
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31 {
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32 DeclarationStatement ds = new DeclarationStatement(loc, exp.syntaxCopy());
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33 return ds;
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34 }
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35
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36 void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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37 {
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38 exp.toCBuffer(buf, hgs);
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39 }
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40
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41 void scopeCode(Scope sc, Statement* sentry, Statement* sexception, Statement* sfinally)
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42 {
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43 //printf("DeclarationStatement.scopeCode()\n");
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44 //print();
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45
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46 *sentry = null;
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47 *sexception = null;
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48 *sfinally = null;
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49
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50 if (exp)
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51 {
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52 if (exp.op == TOK.TOKdeclaration)
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53 {
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54 DeclarationExp de = cast(DeclarationExp)exp;
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55 VarDeclaration v = de.declaration.isVarDeclaration();
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56 if (v)
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57 {
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58 Expression e;
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59
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60 e = v.callAutoDtor(sc);
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61 if (e)
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62 {
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63 //printf("dtor is: "); e.print();
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64 static if (false) {
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65 if (v.type.toBasetype().ty == Tstruct)
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66 {
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67 /* Need a 'gate' to turn on/off destruction,
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68 * in case v gets moved elsewhere.
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69 */
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70 Identifier id = Lexer.uniqueId("__runDtor");
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71 ExpInitializer ie = new ExpInitializer(loc, new IntegerExp(1));
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72 VarDeclaration rd = new VarDeclaration(loc, Type.tint32, id, ie);
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73 *sentry = new DeclarationStatement(loc, rd);
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74 v.rundtor = rd;
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75
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76 /* Rewrite e as:
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77 * rundtor && e
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78 */
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79 Expression ve = new VarExp(loc, v.rundtor);
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80 e = new AndAndExp(loc, ve, e);
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81 e.type = Type.tbool;
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82 }
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83 }
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84 *sfinally = new ExpStatement(loc, e);
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85 }
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86 }
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87 }
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88 }
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89 }
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90
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91 DeclarationStatement isDeclarationStatement() { return this; }
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92 } |
