https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88512
Bug ID: 88512
Summary: Too much STL in error output
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jg at jguk dot org
Target Milestone: ---
Hello
Could the STL template output be reduced? It currently is roughly double that
of CLANG. Although I think can reasonably get down to 3 lines. Output included
below, and an example of something more brief.
// g++ -Wall -o stl_string stl_string.cpp
#include <string>
int main()
{
std::string str("hello ");
std::size_t s = str.find(" ");
str.erase(s, str.end());
}
Expected output something similar to the following expected
stl_string.cpp: In function ‘int main()’:
stl_string.cpp:10:15: error: invalid conversion from ‘std::size_t’
’const_iterator’ std::string erase()
Actual output:
$ g++ -Wall -o stl_string stl_string.cpp
stl_string.cpp: In function ‘int main()’:
stl_string.cpp:7:27: error: no matching function for call to
‘std::__cxx11::basic_string<char>::erase(std::size_t&,
std::__cxx11::basic_string<char>::iterator)’
str.erase(s, str.end());
^
In file included from /usr/include/c++/7/string:52:0,
from stl_string.cpp:2:
/usr/include/c++/7/bits/basic_string.h:1779:7: note: candidate:
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&
std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::erase(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]
erase(size_type __pos = 0, size_type __n = npos)
^~~~~
/usr/include/c++/7/bits/basic_string.h:1779:7: note: no known conversion for
argument 2 from ‘std::__cxx11::basic_string<char>::iterator {aka
__gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string<char> >}’ to
‘std::__cxx11::basic_string<char>::size_type {aka long unsigned int}’
/usr/include/c++/7/bits/basic_string.h:1798:7: note: candidate:
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::iterator
std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::erase(std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::__const_iterator) [with _CharT = char; _Traits =
std::char_traits<char>; _Alloc = std::allocator<char>;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::iterator =
__gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string<char> >;
typename __gnu_cxx::__alloc_traits<typename
__gnu_cxx::__alloc_traits<_Alloc>::rebind<_CharT>::other>::pointer = char*;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::__const_iterator =
__gnu_cxx::__normal_iterator<const char*, std::__cxx11::basic_string<char> >;
typename __gnu_cxx::__alloc_traits<typename
__gnu_cxx::__alloc_traits<_Alloc>::rebind<_CharT>::other>::const_pointer =
const char*]
erase(__const_iterator __position)
^~~~~
/usr/include/c++/7/bits/basic_string.h:1798:7: note: candidate expects 1
argument, 2 provided
/usr/include/c++/7/bits/basic_string.h:1817:7: note: candidate:
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::iterator
std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::erase(std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::__const_iterator, std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::__const_iterator) [with _CharT = char; _Traits =
std::char_traits<char>; _Alloc = std::allocator<char>;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::iterator =
__gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string<char> >;
typename __gnu_cxx::__alloc_traits<typename
__gnu_cxx::__alloc_traits<_Alloc>::rebind<_CharT>::other>::pointer = char*;
std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::__const_iterator =
__gnu_cxx::__normal_iterator<const char*, std::__cxx11::basic_string<char> >;
typename __gnu_cxx::__alloc_traits<typename
__gnu_cxx::__alloc_traits<_Alloc>::rebind<_CharT>::other>::const_pointer =
const char*]
erase(__const_iterator __first, __const_iterator __last)
^~~~~
/usr/include/c++/7/bits/basic_string.h:1817:7: note: no known conversion for
argument 1 from ‘std::size_t {aka long unsigned int}’ to
‘std::__cxx11::basic_string<char>::__const_iterator {aka
__gnu_cxx::__normal_iterator<const char*, std::__cxx11::basic_string<char> >}’
CLANG:
$ clang -Wall -o stl_string stl_string.cpp
stl_string.cpp:7:9: error: no matching member function for call to 'erase'
str.erase(s, str.end());
~~~~^~~~~
/usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/basic_string.h:1789:7:
note: candidate
function not viable: no known conversion from
'std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >::iterator' (aka '__normal_iterator<char *,
std::__cxx11::basic_string<char> >') to
'std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >::size_type'
(aka 'unsigned long') for 2nd argument
erase(size_type __pos = 0, size_type __n = npos)
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/basic_string.h:1827:7:
note: candidate
function not viable: no known conversion from 'std::size_t' (aka
'unsigned long') to
'std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >::__const_iterator' (aka
'__normal_iterator<const char *, std::__cxx11::basic_string<char> >') for
1st argument
erase(__const_iterator __first, __const_iterator __last)
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/basic_string.h:1808:7:
note: candidate
function not viable: requires single argument '__position', but 2
arguments were provided
erase(__const_iterator __position)
^
1 error generated.
