On Saturday, 19 May 2012 at 18:17:16 UTC, Matthias Walter wrote:
On 2012-05-19 15:28, Philippe Sigaud wrote:
On Sat, May 19, 2012 at 12:23 PM, Matthias Walter
<xa...@xammy.homelinux.net> wrote:
I would open a bug report with the following code which is a
bit smaller
than my first wrong version:
=====================
(...)
pragma(msg, typeof(w.aliasStruct).Alias.stringof); // ->
"MyStruct"
pragma(msg, AliasStruct.Alias.stringof); // -> "MyStruct"
static assert(is(typeof(w.aliasStruct) == AliasStruct)); //
-> true
static assert(is(typeof(w.aliasStruct).Alias ==
AliasStruct.Alias));
// -> false
}
Seems like a pb concerning whether Alias is a type or a
symbol. See
A,B,C,D below:
void main()
{
Wrapper w;
pragma(msg, typeof(w.aliasStruct).Alias.stringof); // ->
"MyStruct"
pragma(msg, AliasStruct.Alias.stringof); // -> "MyStruct"
static assert(is(typeof(w.aliasStruct) == AliasStruct)); //
-> true
static assert(is(w.aliasStruct.Alias == AliasStruct.Alias));
// -> true
alias typeof(w.aliasStruct) A; // -> OK
//alias typeof(w.aliasStruct).Alias B; // -> NOK
//alias A.Alias C; // -> NOK
alias w.aliasStruct.Alias D; // -> OK
static assert(is(A.Alias == AliasStruct.Alias)); // -> true
//static assert(is(B == AliasStruct.Alias));
//static assert(is(C == AliasStruct.Alias));
static assert(is(D == AliasStruct.Alias)); // -> true
}
I think A is enough for your need, but I don't get why B and C
are not
accepted (DMD 2.059, Linux)
Using the current git version of dmd I realized that C works!
Hence, as
a workaround it can be used by creating a local alias A and
subsequently
using A.Alias in the is-expressions. But it seems odd that
"alias typeof(X).A B;" does not work but
"alias typeof(X) Y; alias Y.A B;" does.
Is this considered as a bug?
Best regards,
Matthias
It seems to me that is a regression by fixing bug 6475.
Now I'm trying to fix them.
