http://d.puremagic.com/issues/show_bug.cgi?id=6382
Summary: edge case with static foreach
Product: D
Version: D2
Platform: Other
OS/Version: Windows
Status: NEW
Severity: normal
Priority: P2
Component: DMD
AssignedTo: [email protected]
ReportedBy: [email protected]
--- Comment #0 from Andrej Mitrovic <[email protected]> 2011-07-26
05:33:56 PDT ---
import std.typetuple;
struct Foo
{
this(void delegate() dg) { }
}
void test()
{
Foo[] result;
foreach (Type; TypeTuple!(int, int))
{
result ~= Foo( (){} );
}
}
void main()
{
test();
}
OPTLINK (R) for Win32 Release 8.00.12
Copyright (C) Digital Mars 1989-2010 All rights reserved.
http://www.digitalmars.com/ctg/optlink.html
C:\DOCUME~1\Andrej\LOCALS~1\Temp\.rdmd\rdmd-ctfe_bug22.d-97E30C11895AB443DA692FB4CE11A18B\ctfe_bug22-d-97E30C11895AB443DA692FB4CE11A18B.obj(ctfe_bug22-d-97E30C11895AB443DA692FB4CE11A18B)
Offset 00960H Record Type 00C3
Error 1: Previous Definition Different :
_D12createFields4testFZv12__dgliteral1MFZv
It seems as if the compiler generates two delegates with the same name inside
of test(), and they end up clashing. Of course, this function should be called
at compile time, not runtime. The fix is to use it as a template:
import std.typetuple;
struct Foo
{
this(void delegate() dg) { }
}
void test()() // template func
{
Foo[] result;
foreach (Type; TypeTuple!(int, int))
{
result ~= Foo( (){} );
}
}
void main()
{
test!(); // call it as a template
}
I don't know if the first case is accepts-invalid or completely legal, but
linker errors are never nice to see. Anyway I thought this was worth putting
here.
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