279 – Nested class can't access var in outer function scope, if nested in class

The nested class can refer to members of the enclosing class, but not variables in the enclosing function.
I assume the problem is that the context pointer of the anonymous class nested within Foo's constructor refers to the Foo instance, and not to the stack-frame of the constructor.
Whether intentional or not, the compiler accepts the program and generates buggy code.
--- Test case ---
import std.stdio;
void foo()
{
 int x = 42;
 new class Object
 {
 this() { writef("%s\n", x); }
 };
}
class Foo
{
 this()
 {
 int x = 42;
 new class Object
 {
 this() { writef("%s\n", x); }
 // Can't access 'x'. Any members of Foo are accessible, however. 
 };
 }
}
void main()
{
 foo(); // prints 42
 new Foo(); // prints garbage integer (e.g. 0, on my system.)
}

Fixed DMD 0.164

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d-bugmail@puremagic.com schrieb am 2006年08月05日:
> http://d.puremagic.com/issues/show_bug.cgi?id=279 
> The nested class can refer to members of the enclosing class, but not variables
> in the enclosing function.
>
> I assume the problem is that the context pointer of the anonymous class nested
> within Foo's constructor refers to the Foo instance, and not to the stack-frame
> of the constructor.
>
> Whether intentional or not, the compiler accepts the program and generates
> buggy code.
>
> --- Test case ---
>
> import std.stdio;
>
> void foo()
> {
> int x = 42;
>
> new class Object
> {
> this() { writef("%s\n", x); }
> };
> }
>
> class Foo
> {
> this()
> {
> int x = 42;
>
> new class Object
> {
> this() { writef("%s\n", x); }
> // Can't access 'x'. Any members of Foo are accessible, however. 
> };
> }
> }
>
> void main()
> {
> foo(); // prints 42
>
> new Foo(); // prints garbage integer (e.g. 0, on my system.)
> }
Added to DStress as
http://dstress.kuehne.cn/run/c/class_25_A.d
http://dstress.kuehne.cn/run/c/class_25_B.d
http://dstress.kuehne.cn/run/c/class_25_C.d
http://dstress.kuehne.cn/run/c/class_25_D.d
http://dstress.kuehne.cn/run/c/class_25_E.d
Thomas
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