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* [Bug c++/64488] New: [4.9/5.0][c++11] Expand initializer list with lambdas in variadic template. Reject valid code.
@ 2015-01-04 16:00 reagentoo at gmail dot com
2015-01-04 16:10 ` [Bug c++/64488] " redi at gcc dot gnu.org
2015-01-04 16:12 ` redi at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: reagentoo at gmail dot com @ 2015-01-04 16:00 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64488
Bug ID: 64488
Summary: [4.9/5.0][c++11] Expand initializer list with lambdas
in variadic template. Reject valid code.
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: reagentoo at gmail dot com
The following valid code snippet (compiled with "-std=c++11") rejected in GCC
5.0.0 (20150103) but compiles with Clang normal:
=======================================================
#include <iostream>
template <int _i>
struct Lmb
{
static void fff() { std::cout << _i << std::endl; }
};
template <int... _is>
struct Expand
{
Expand() { }
static constexpr uint m_size = sizeof...(_is);
static void (*const m_arr[m_size])();
};
template <int... _is>
void (*const Expand<_is...>::m_arr[m_size])() = {
[] () { std::cout << _is << std::endl; } ...
//Lmb<_is>::fff...
};
int main()
{
Expand<12,34,56> e;
e.m_arr[0]();
e.m_arr[1]();
e.m_arr[2]();
return 24;
}
=======================================================
GCC 5.0.0 (20150103) output:
-------------------------------------------------------
prog.cc: In lambda function:
prog.cc:20:46: error: parameter packs not expanded with '...':
[] () { std::cout << _is << std::endl; } ...
^
prog.cc:20:46: note: '_is'
prog.cc: At global scope:
prog.cc:20:50: error: expansion pattern '<lambda>' contains no argument packs
[] () { std::cout << _is << std::endl; } ...
^
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/64488] [4.9/5.0][c++11] Expand initializer list with lambdas in variadic template. Reject valid code.
2015-01-04 16:00 [Bug c++/64488] New: [4.9/5.0][c++11] Expand initializer list with lambdas in variadic template. Reject valid code reagentoo at gmail dot com
@ 2015-01-04 16:10 ` redi at gcc dot gnu.org
2015-01-04 16:12 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2015-01-04 16:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64488
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-01-04
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:
template <int... _is>
struct Expand
{
static void (*const m_arr[sizeof...(_is)])();
};
template <int... _is>
void (*const Expand<_is...>::m_arr[])() = {
[] () { (void)_is; } ...
};
int main()
{
Expand<12,34,56> e;
e.m_arr[0]();
e.m_arr[1]();
e.m_arr[2]();
}
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/64488] [4.9/5.0][c++11] Expand initializer list with lambdas in variadic template. Reject valid code.
2015-01-04 16:00 [Bug c++/64488] New: [4.9/5.0][c++11] Expand initializer list with lambdas in variadic template. Reject valid code reagentoo at gmail dot com
2015-01-04 16:10 ` [Bug c++/64488] " redi at gcc dot gnu.org
@ 2015-01-04 16:12 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2015-01-04 16:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64488
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |54367
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
probably a dup of PR 47226
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2015-01-04 16:12 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2015-01-04 16:00 [Bug c++/64488] New: [4.9/5.0][c++11] Expand initializer list with lambdas in variadic template. Reject valid code reagentoo at gmail dot com
2015-01-04 16:10 ` [Bug c++/64488] " redi at gcc dot gnu.org
2015-01-04 16:12 ` redi at gcc dot gnu.org
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