यहाँ MCVE है:सरल std :: regex_search() कोड एप्पल बजना साथ संकलन नहीं होगा ++ -std = C++ 14
#include <iostream>
#include <regex>
std::string s()
{
return "test";
}
int main()
{
static const std::regex regex(R"(\w)");
std::smatch smatch;
if (std::regex_search(s(), smatch, regex)) {
std::cout << smatch[0] << std::endl;
}
return 0;
}
यह साथ ठीक संकलित:
$ बजना ++ -std = C++ 11 main.cpp
नहीं बल्कि साथ:
$ बजना ++ -std = C++ 14 main.cpp
त्रुटि बाद में मामले में संदेश (-std साथ = C++ 14):
main.cpp:14:9: error: call to deleted function 'regex_search'
if (std::regex_search(s(), smatch, regex)) {
^~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/regex:5998:1: note:
candidate function [with _ST = std::__1::char_traits<char>, _SA = std::__1::allocator<char>,
_Ap = std::__1::allocator<std::__1::sub_match<std::__1::__wrap_iter<const char *> > >, _Cp =
char, _Tp = std::__1::regex_traits<char>] has been explicitly deleted
regex_search(const basic_string<_Cp, _ST, _SA>&& __s,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/regex:2876:5: note:
candidate function [with _ST = std::__1::char_traits<char>, _SA = std::__1::allocator<char>,
_Ap = std::__1::allocator<std::__1::sub_match<std::__1::__wrap_iter<const char *> > >, _Cp =
char, _Tp = std::__1::regex_traits<char>]
regex_search(const basic_string<_Cp, _ST, _SA>& __s,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/regex:2851:5: note:
candidate template ignored: deduced conflicting types for parameter '_Bp'
('std::__1::basic_string<char>' vs. 'std::__1::match_results<std::__1::__wrap_iter<const char
*>, std::__1::allocator<std::__1::sub_match<std::__1::__wrap_iter<const char *> > > >')
regex_search(_Bp, _Bp, const basic_regex<_Cp, _Tp>&,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/regex:2857:5: note:
candidate template ignored: could not match 'const _Cp *' against 'std::string' (aka
'basic_string<char, char_traits<char>, allocator<char> >')
regex_search(const _Cp*, const _Cp*,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/regex:2863:5: note:
candidate template ignored: could not match 'const _Cp *' against 'std::string' (aka
'basic_string<char, char_traits<char>, allocator<char> >')
regex_search(const _Cp*, match_results<const _Cp*, _Ap>&, const basic_regex<_Cp, _Tp>&,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/regex:2869:5: note:
candidate template ignored: could not match 'basic_regex' against 'match_results'
regex_search(const basic_string<_Cp, _ST, _SA>& __s,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/regex:5963:1: note:
candidate template ignored: could not match 'const _CharT *' against 'std::string' (aka
'basic_string<char, char_traits<char>, allocator<char> >')
regex_search(const _CharT* __str, const basic_regex<_CharT, _Traits>& __e,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/regex:2839:5: note:
candidate function template not viable: requires at least 4 arguments, but 3 were provided
regex_search(_Bp, _Bp, match_results<_Bp, _Ap>&, const basic_regex<_Cp, _Tp>&,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/regex:2845:5: note:
candidate function template not viable: requires at least 4 arguments, but 3 were provided
regex_search(const _Cp*, const _Cp*, match_results<const _Cp*, _Ap>&,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/regex:2884:5: note:
candidate function template not viable: requires at least 4 arguments, but 3 were provided
regex_search(__wrap_iter<_Iter> __first,
^
1 error generated.
संकलक संस्करण जानकारी:
$ clang++ -v
Apple LLVM version 7.0.0 (clang-700.0.72)
Target: x86_64-apple-darwin15.0.0
Thread model: posix
तो, क्या गलत है?
यह ध्यान रखना दिलचस्प है कि gcc/libstdC++ में यह C++ 11 और C++ 14 दोनों में विफल रहा है जो एक अच्छी चीज की तरह लगता है क्योंकि यह मूल रूप से अपरिभाषित व्यवहार है। –
आप जानते हैं कि मुझे लगभग यकीन था कि मैंने यह समस्या पहले देखने से पहले देखी थी: [विजुअल स्टूडियो regex_iterator बग?] (Http://stackoverflow.com/q/29895747/1708801) हालांकि यह regex_iterator/regex_token_iterator के साथ है। –