[Issue 6072] New: [CTFE] Regression(git master): Cannot declare variable inside an 'if' condition

d-bugmail at puremagic.com d-bugmail at puremagic.com
Sun May 29 03:40:58 PDT 2011


http://d.puremagic.com/issues/show_bug.cgi?id=6072

           Summary: [CTFE] Regression(git master): Cannot declare variable
                    inside an 'if' condition
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Mac OS X
            Status: NEW
          Keywords: rejects-valid
          Severity: regression
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: kennytm at gmail.com


--- Comment #0 from kennytm at gmail.com 2011-05-29 03:36:37 PDT ---
Test case:

---------------
static assert({
    if (int x = 5) {}
    return true;
}());
void main(){}
---------------
x.d(4): Error: cannot evaluate delegate bool()
{
if (int x = int x = 5;
 , x)
{
}
return true;
}
() at compile time
x.d(1): Error: static assert  (delegate bool()
{
if (int x = int x = 5;
 , x)
{
}
return true;
}
()) is not evaluatable at compile time
---------------

This bug was introduced in commit 269a344 as a fix to bug 3688.

The direct consequence is std.traits.functionAttributes is no longer usable.

------------------
import std.traits;
struct S {
    pure int f();
}
enum g = functionAttributes!(S.f);
------------------
/usr/include/phobos/std/traits.d(363): Error: cannot evaluate
demangleFunctionAttributes("NaZi"c) at compile time
------------------

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