https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84087
Bug ID: 84087
Summary: string::assign problem with two arguments
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: bseifert at gmx dot at
Target Milestone: ---
Created attachment 43267
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43267&action=edit
does not compile as expected
>From C++14, string::assign can be called with two arguments: the string (1) and
the position (2). The length (3) is optional.
This worked in gcc 7.2.0. In 7.3.0 (with the updated libstdc++), the call with
only 2 arguments does not work.
gcc 7.3.0 was compiled with default settings in Windows 10 bash. The following
line is used to compile main.cpp (attached):
~/gcc-7.3.0/bin/gcc main.cpp --std=c++14
The following error messages are returned:
main.cpp: In function ‘int main()’:
main.cpp:8:17: error: no matching function for call to
‘std::__cxx11::basic_string<char>::assign(std::__cxx11::string&, int)’
s.assign(s, 2);
^
In file included from /home/seifert/gcc-7.3.0/include/c++/7.3.0/string:52:0,
from main.cpp:3:
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1345:7: note:
candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::assign(const
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char;
_Traits = std::char_traits<char>; _Alloc = std::allocator<char>]
assign(const basic_string& __str)
^~~~~~
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1345:7: note:
candidate expects 1 argument, 2 provided
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1361:7: note:
candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&
std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::assign(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&) [with
_CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]
assign(basic_string&& __str)
^~~~~~
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1361:7: note:
candidate expects 1 argument, 2 provided
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1384:7: note:
candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::assign(const
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&,
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type,
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT =
char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned
int]
assign(const basic_string& __str, size_type __pos, size_type __n)
^~~~~~
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1384:7: note:
candidate expects 3 arguments, 2 provided
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1400:7: note:
candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::assign(const _CharT*,
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT =
char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned
int]
assign(const _CharT* __s, size_type __n)
^~~~~~
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1400:7: note:
no known conversion for argument 1 from ‘std::__cxx11::string {aka
std::__cxx11::basic_string<char>}’ to ‘const char*’
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1416:7: note:
candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::assign(const _CharT*)
[with _CharT = char; _Traits = std::char_traits<char>; _Alloc =
std::allocator<char>]
assign(const _CharT* __s)
^~~~~~
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1416:7: note:
candidate expects 1 argument, 2 provided
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1433:7: note:
candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&
std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::assign(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type,
_CharT) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc =
std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::size_type = long unsigned int]
assign(size_type __n, _CharT __c)
^~~~~~
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1433:7: note:
no known conversion for argument 1 from ‘std::__cxx11::string {aka
std::__cxx11::basic_string<char>}’ to
‘std::__cxx11::basic_string<char>::size_type {aka long unsigned int}’
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1451:9: note:
candidate: template<class _InputIterator, class>
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::assign(_InputIterator,
_InputIterator) [with _InputIterator = _InputIterator; <template-parameter-2-2>
= <template-parameter-1-2>; _CharT = char; _Traits = std::char_traits<char>;
_Alloc = std::allocator<char>]
assign(_InputIterator __first, _InputIterator __last)
^~~~~~
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1451:9: note:
template argument deduction/substitution failed:
main.cpp:8:17: note: deduced conflicting types for parameter ‘_InputIterator’
(‘std::__cxx11::basic_string<char>’ and ‘int’)
s.assign(s, 2);
^
In file included from /home/seifert/gcc-7.3.0/include/c++/7.3.0/string:52:0,
from main.cpp:3:
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1461:7: note:
candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&
std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::assign(std::initializer_list<_Tp>) [with _CharT = char; _Traits =
std::char_traits<char>; _Alloc = std::allocator<char>]
assign(initializer_list<_CharT> __l)
^~~~~~
/home/seifert/gcc-7.3.0/include/c++/7.3.0/bits/basic_string.h:1461:7: note:
candidate expects 1 argument, 2 provided
