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comparison dmd/DeclarationStatement.d @ 0:10317f0c89a5

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Initial commit
author korDen
date Sat, 24 Oct 2009 08:42:06 +0400
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children 2e2a5c3f943a
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-1:000000000000 0:10317f0c89a5
1 module dmd.DeclarationStatement;
2
3 import dmd.Loc;
4 import dmd.ExpStatement;
5 import dmd.Dsymbol;
6 import dmd.Expression;
7 import dmd.Statement;
8 import dmd.OutBuffer;
9 import dmd.HdrGenState;
10 import dmd.Scope;
11 import dmd.DeclarationExp;
12 import dmd.TOK;
13 import dmd.VarDeclaration;
14
15 class DeclarationStatement : ExpStatement
16 {
17 // Doing declarations as an expression, rather than a statement,
18 // makes inlining functions much easier.
19
20 this(Loc loc, Dsymbol declaration)
21 {
22 super(loc, new DeclarationExp(loc, declaration));
23 }
24
25 this(Loc loc, Expression exp)
26 {
27 super(loc, exp);
28 }
29
30 Statement syntaxCopy()
31 {
32 DeclarationStatement ds = new DeclarationStatement(loc, exp.syntaxCopy());
33 return ds;
34 }
35
36 void toCBuffer(OutBuffer buf, HdrGenState* hgs)
37 {
38 exp.toCBuffer(buf, hgs);
39 }
40
41 void scopeCode(Scope sc, Statement* sentry, Statement* sexception, Statement* sfinally)
42 {
43 //printf("DeclarationStatement.scopeCode()\n");
44 //print();
45
46 *sentry = null;
47 *sexception = null;
48 *sfinally = null;
49
50 if (exp)
51 {
52 if (exp.op == TOK.TOKdeclaration)
53 {
54 DeclarationExp de = cast(DeclarationExp)exp;
55 VarDeclaration v = de.declaration.isVarDeclaration();
56 if (v)
57 {
58 Expression e;
59
60 e = v.callAutoDtor(sc);
61 if (e)
62 {
63 //printf("dtor is: "); e.print();
64 static if (false) {
65 if (v.type.toBasetype().ty == Tstruct)
66 {
67 /* Need a 'gate' to turn on/off destruction,
68 * in case v gets moved elsewhere.
69 */
70 Identifier id = Lexer.uniqueId("__runDtor");
71 ExpInitializer ie = new ExpInitializer(loc, new IntegerExp(1));
72 VarDeclaration rd = new VarDeclaration(loc, Type.tint32, id, ie);
73 *sentry = new DeclarationStatement(loc, rd);
74 v.rundtor = rd;
75
76 /* Rewrite e as:
77 * rundtor && e
78 */
79 Expression ve = new VarExp(loc, v.rundtor);
80 e = new AndAndExp(loc, ve, e);
81 e.type = Type.tbool;
82 }
83 }
84 *sfinally = new ExpStatement(loc, e);
85 }
86 }
87 }
88 }
89 }
90
91 DeclarationStatement isDeclarationStatement() { return this; }
92 }