On 8/20/19 1:24 PM, Andreas Tille wrote: > Control: tags -1 help > > Hi, > > any hint how to deal with
this is a test file. In test, there is explicit conversion to string: line = reader.line_string() ; //first line - with explicit method to get the string which works fine as expected In gcc 9 bug, it is implicit conversion that fails. Seems due some c++ 11 updates on operators, but I am not an expert on this kind of stuff. As this is only a test, and there is a way to get the result as a string (as first test above test with explicit method), I wonder if we could not simply patch to remove those lines: line = reader ; //second line - with implicit conversion to std::string ASSERT( line == "second line" ) ; Further test may also complain (using implicit too): istream &is2 ( reader ) ; // fourth line - with implicit conversion to std::istream However, as it is a library, implicit conversion may fail on other tools linking with this lib.... Best of course would be to get a fix for this assignement operator Olivier > > > ... > g++ -DHAVE_CONFIG_H -I. -I.. -I../src -Wdate-time -D_FORTIFY_SOURCE=2 -g > -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat > -Werror=format-security -Wall -Wextra -Wformat-nonliteral -Wformat-security > -Wswitch-default -Wswitch-enum -Wunused-parameter -Wfloat-equal -Werror > -DDEBUG -g -O1 -DDEBUG -g -O1 -c -o test_text_reader.o test_text_reader.cpp > test_text_reader.cpp: In function 'int main()': > test_text_reader.cpp:48:9: error: ambiguous overload for 'operator=' (operand > types are 'std::string' {aka 'std::__cxx11::basic_string<char>'} and > 'TextLineReader') > 48 | line = reader ; //second line - with implicit conversion to > std::string > | ^~~~~~ > In file included from /usr/include/c++/9/string:55, > from /usr/include/c++/9/bits/locale_classes.h:40, > from /usr/include/c++/9/bits/ios_base.h:41, > from /usr/include/c++/9/ios:42, > from /usr/include/c++/9/ostream:38, > from /usr/include/c++/9/iostream:39, > from test_text_reader.cpp:19: > /usr/include/c++/9/bits/basic_string.h:665:7: note: candidate: > 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>& > std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator=(const > std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char; > _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]' > 665 | operator=(const basic_string& __str) > | ^~~~~~~~ > /usr/include/c++/9/bits/basic_string.h:732:7: note: candidate: > 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>& > std::__cxx11::basic_string<_CharT, _Traits, > _Alloc>::operator=(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&) > [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = > std::allocator<char>]' > 732 | operator=(basic_string&& __str) > | ^~~~~~~~ > make[3]: *** [Makefile:781: test_text_reader.o] Error 1 > > > Kind regards > > Andreas. > > -- Olivier Sallou Univ Rennes, Inria, CNRS, IRISA Irisa, Campus de Beaulieu F-35042 RENNES - FRANCE Tel: 02.99.84.71.95 gpg key id: 4096R/326D8438 (keyring.debian.org) Key fingerprint = 5FB4 6F83 D3B9 5204 6335 D26D 78DC 68DB 326D 8438