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* [Bug c++/61057] New: [C++11] operator . considered part of User Defined Literal invocation.
@ 2014-05-04 18:18 isupeene at ualberta dot ca
2014-05-04 20:25 ` [Bug c++/61057] " redi at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: isupeene at ualberta dot ca @ 2014-05-04 18:18 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61057
Bug ID: 61057
Summary: [C++11] operator . considered part of User Defined
Literal invocation.
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: isupeene at ualberta dot ca
Created attachment 32730
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32730&action=edit
Contains udl_bug.cpp and udl_bug_workaround.cpp
When compiling with 'g++ -std=c++11 <filename>':
The attached file udl_bug.cpp reproduces the bug, producing the error: "error:
unable to find numeric literal operator ‘operator"" _i.m_value’".
The attached file udl_bug_workaround.cpp compiles successfully and produces the
expected output.
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From: "megahallon at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/60014] Bad warning suppression caused by track-macro-expansion when not using integrated cpp
Date: Sun, 04 May 2014 18:54:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id`014
--- Comment #1 from Fredrik Hallenberg <megahallon at gmail dot com> ---
Same results with gcc 4.9.0
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/61057] [C++11] operator . considered part of User Defined Literal invocation.
2014-05-04 18:18 [Bug c++/61057] New: [C++11] operator . considered part of User Defined Literal invocation isupeene at ualberta dot ca
@ 2014-05-04 20:25 ` redi at gcc dot gnu.org
2014-07-09 15:58 ` emsr at gcc dot gnu.org
2014-07-09 16:04 ` emsr at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: redi at gcc dot gnu.org @ 2014-05-04 20:25 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61057
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |emsr at gcc dot gnu.org
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:
class Int {
public:
constexpr Int(long long unsigned value)
: m_value(value)
{}
const long long unsigned m_value;
};
constexpr Int operator "" _i(long long unsigned i) {
return Int(i);
}
auto x = 1_i.m_value;
I think G++ is correct, the grammar in the standard defines 1_i.m_value as a
pp-number, i.e. a single preprocessing token, which is treated as a literal, so
_i.m_value is looked up as the suffix.
Clang gives the same error.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/61057] [C++11] operator . considered part of User Defined Literal invocation.
2014-05-04 18:18 [Bug c++/61057] New: [C++11] operator . considered part of User Defined Literal invocation isupeene at ualberta dot ca
2014-05-04 20:25 ` [Bug c++/61057] " redi at gcc dot gnu.org
@ 2014-07-09 15:58 ` emsr at gcc dot gnu.org
2014-07-09 16:04 ` emsr at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: emsr at gcc dot gnu.org @ 2014-07-09 15:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61057
emsr at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from emsr at gcc dot gnu.org ---
As someone who has dabbled in Ruby I am sympathetic to the request to have this
work. After looking at the standard language and our implementation I must
conclude that your code is invalid. I then tried to imagine a way, for
example, if the stuff after a dot could not be a mantissa stop processing chars
at the dot so the remainder can become an invocation or access. Unfortunately,
123. is a valid double so this idea can't work even as an extension.
FWIW, character and string user-defined literals can have invocations like
"Hello, World!!!"s.length().
Perhaps two dots could signal a termination of a literal as was tried for '_'
as digit separator. This would require much noodling by the standards folks
though.
I'll ponder this last idea but I'll mark this as resolved invalid.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/61057] [C++11] operator . considered part of User Defined Literal invocation.
2014-05-04 18:18 [Bug c++/61057] New: [C++11] operator . considered part of User Defined Literal invocation isupeene at ualberta dot ca
2014-05-04 20:25 ` [Bug c++/61057] " redi at gcc dot gnu.org
2014-07-09 15:58 ` emsr at gcc dot gnu.org
@ 2014-07-09 16:04 ` emsr at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: emsr at gcc dot gnu.org @ 2014-07-09 16:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61057
--- Comment #3 from emsr at gcc dot gnu.org ---
Leaving a space before the dot also works.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2014-05-04 18:18 [Bug c++/61057] New: [C++11] operator . considered part of User Defined Literal invocation isupeene at ualberta dot ca
2014-05-04 20:25 ` [Bug c++/61057] " redi at gcc dot gnu.org
2014-07-09 15:58 ` emsr at gcc dot gnu.org
2014-07-09 16:04 ` emsr at gcc dot gnu.org
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