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digitalmars.D.bugs - typedef, implicit cast, bug or feature?

reply Anders Runesson <anders runesson.info> writes:
I'm not sure if this is me missing something, or if it's a bug:

********
import std.stdio;

class BaseClass {
        int BaseProp() { return 1; }
}

typedef BaseClass ClassTypedef;

void testfunc(ClassTypedef t) {    writefln(t.BaseProp());   }
*************

this gives the compiler message:

test.d(9): this for BaseProp needs to be type BaseClass not type
ClassTypedef

The docs say that typedefs can be implicitly cast to their underlying
type, so why can't t be used as a BaseClass reference? Seems like a bug
to me.
/Anders
Jul 16 2006
parent Thomas Kuehne <thomas-dloop kuehne.cn> writes:
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Anders Runesson schrieb am 2006-07-16:

 I'm not sure if this is me missing something, or if it's a bug:

 ********
 import std.stdio;

 class BaseClass {
         int BaseProp() { return 1; }
 }

 typedef BaseClass ClassTypedef;

 void testfunc(ClassTypedef t) {    writefln(t.BaseProp());   }
 *************

 this gives the compiler message:

 test.d(9): this for BaseProp needs to be type BaseClass not type
 ClassTypedef

 The docs say that typedefs can be implicitly cast to their underlying
 type, so why can't t be used as a BaseClass reference? Seems like a bug
 to me.
 /Anders


Added to DStress as
http://dstress.kuehne.cn/run/t/typedef_19_A.d
http://dstress.kuehne.cn/run/t/typedef_19_B.d
http://dstress.kuehne.cn/run/t/typedef_19_C.d
http://dstress.kuehne.cn/run/t/typedef_19_D.d

Thomas


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Sep 14 2006