https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94457
Bug ID: 94457
Summary: using ~VariableName in trailing return type deduction
does not compile
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: peter_foelsche at mentor dot com
Target Milestone: ---
Created attachment 48171
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48171&action=edit
test source code
using ~std::declval<T>() instead works fine -- use -D__WORKS__
-- use -std=c++11
g++ ~/test.cpp -std=c++11:
/home/pfoelsch/test.cpp: In function 'int main(int, char**)':
/home/pfoelsch/test.cpp:22:34: error: no match for call to '(bit_not) (test)'
{ const auto s = bit_not()(test());
^
/home/pfoelsch/test.cpp:12:7: note: candidate: template<class T> decltype (~
_r) bit_not::operator()(const T&) const
auto operator()(const T&_r) const -> decltype(~ _r)
^
/home/pfoelsch/test.cpp:12:7: note: template argument deduction/substitution
failed:
/home/pfoelsch/test.cpp: In substitution of 'template<class T> decltype (~ _r)
bit_not::operator()(const T&) const [with T = test]':
/home/pfoelsch/test.cpp:22:34: required from here
/home/pfoelsch/test.cpp:12:7: error: '_r' was not declared in this scope
orw-ams-ms7 /scratch/pfoelsch/SYMPHONY/linux_x86_64/release : g++ --version -v
Using built-in specs.
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g++ (GCC) 5.3.0
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
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Target: x86_64-unknown-linux-gnu
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GNU assembler (GNU Binutils) 2.31.1
Copyright (C) 2018 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
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This program has absolutely no warranty.
This assembler was configured for a target of `x86_64-unknown-linux-gnu'.
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GNU ld (GNU Binutils) 2.31.1
Copyright (C) 2018 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.
orw-ams-ms7 /scratch/pfoelsch/SYMPHONY/linux_x86_64/release :
