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// -*- C++ -*-
// regex utils for the C++ library testsuite.
//
// Copyright (C) 2012-2019 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
//
#ifndef _TESTSUITE_REGEX_H
#define _TESTSUITE_REGEX_H 1
#include <regex>
#include <stdexcept>
#include <iostream>
namespace __gnu_test
{
// Test on a compilation of simple expressions, throw regex_error on error.
typedef std::regex regex_type;
typedef regex_type::flag_type flag_type;
typedef std::regex_constants::match_flag_type match_flag_type;
typedef std::regex_constants::error_type error_type;
typedef std::size_t size_type;
typedef std::string string_type;
using std::basic_regex;
using std::match_results;
// Utilities
struct regex_expected_fail { };
const error_type regex_error_internal(static_cast<error_type>(-1));
// Stringify error codes for text logging.
const char* regex_error_codes[] =
{
"error_collate",
"error_ctype",
"error_escape",
"error_backref",
"error_brack",
"error_paren",
"error_brace",
"error_badbrace",
"error_range",
"error_space",
"error_badrepeat",
"error_complexity",
"error_stack"
};
void
show_regex_error_codes()
{
using namespace std;
using namespace std::regex_constants;
const char tab('\t');
cout << "error_collate = " << tab << error_collate << endl;
cout << "error_ctype = " << tab << error_ctype << endl;
cout << "error_escape = " << tab << error_escape << endl;
cout << "error_backref = " << tab << error_backref << endl;
cout << "error_brack = " << tab << error_brack << endl;
cout << "error_paren = " << tab << error_paren << endl;
cout << "error_brace = " << tab << error_brace << endl;
cout << "error_badbrace = " << tab << error_badbrace << endl;
cout << "error_range = " << tab << error_range << endl;
cout << "error_space = " << tab << error_space << endl;
cout << "error_badrepeat = " << tab << error_badrepeat << endl;
cout << "error_complexity =" << tab << error_complexity << endl;
cout << "error_stack = " << tab << error_stack << endl;
}
// Arguments
// string __res: the regular expression string
// flag_type __f: flag
// __error: expected error, if any
void
regex_sanity_check(const string_type& __res,
flag_type __f = regex_type::basic,
error_type __error = regex_error_internal)
{
using namespace std;
try
{
regex_type reo(__res, __f);
auto n = reo.mark_count();
cout << "regex_type::mark_count " << n << endl;
}
catch (const regex_error& e)
{
cout << "regex_sanity_check: " << __res << endl;
cout << "regex_error::what " << e.what() << endl;
show_regex_error_codes();
cout << "regex_error::code " << regex_error_codes[e.code()] << endl;
if (__error != regex_error_internal)
{
// Then expected error_type is __error. Check.
if (__error != e.code())
{
throw regex_expected_fail();
}
}
throw;
}
catch (const logic_error& e)
{
cout << "logic_error::what " << e.what() << endl;
throw;
}
catch (const std::exception& e)
{
cout << "exception: " << endl;
throw;
}
}
// regex_match_debug behaves like regex_match, but will run *two* executors
// (if there's no back-reference) and check if their results agree. If not,
// an exception is thrown. The arguments are the same as for regex_match.
template<typename _Bi_iter, typename _Alloc,
typename _Ch_type, typename _Rx_traits>
bool
regex_match_debug(_Bi_iter __s,
_Bi_iter __e,
match_results<_Bi_iter, _Alloc>& __m,
const basic_regex<_Ch_type, _Rx_traits>& __re,
match_flag_type __flags
= std::regex_constants::match_default)
{
using namespace std::__detail;
auto __res1 = __regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits,
_RegexExecutorPolicy::_S_auto, true>
(__s, __e, __m, __re, __flags);
match_results<_Bi_iter, _Alloc> __mm;
auto __res2 = __regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits,
_RegexExecutorPolicy::_S_alternate, true>
(__s, __e, __mm, __re, __flags);
// __m is unspecified if return value is false.
if (__res1 == __res2 && (!__res1 || __m == __mm))
return __res1;
throw std::exception();
}
// No match_results version
template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits>
inline bool
regex_match_debug(_Bi_iter __first,
_Bi_iter __last,
const basic_regex<_Ch_type, _Rx_traits>& __re,
match_flag_type __flags
= std::regex_constants::match_default)
{
match_results<_Bi_iter> __what;
return regex_match_debug(__first, __last, __what, __re, __flags);
}
// C-string version
template<typename _Ch_type, typename _Alloc, typename _Rx_traits>
inline bool
regex_match_debug(const _Ch_type* __s,
match_results<const _Ch_type*, _Alloc>& __m,
const basic_regex<_Ch_type, _Rx_traits>& __re,
match_flag_type __f
= std::regex_constants::match_default)
{ return regex_match_debug(__s, __s + _Rx_traits::length(__s),
__m, __re, __f); }
// C-string version without match_results
template<typename _Ch_type, class _Rx_traits>
inline bool
regex_match_debug(const _Ch_type* __s,
const basic_regex<_Ch_type, _Rx_traits>& __re,
match_flag_type __f
= std::regex_constants::match_default)
{ return regex_match_debug(__s, __s + _Rx_traits::length(__s),
__re, __f); }
// std::basic_string version
template<typename _Ch_traits, typename _Ch_alloc,
typename _Alloc, typename _Ch_type, typename _Rx_traits>
inline bool
regex_match_debug(const std::basic_string<_Ch_type, _Ch_traits,
_Ch_alloc>& __s,
match_results<typename std::basic_string<_Ch_type,
_Ch_traits, _Ch_alloc>::const_iterator,
_Alloc>& __m,
const basic_regex<_Ch_type, _Rx_traits>& __re,
match_flag_type __flags
= std::regex_constants::match_default)
{ return regex_match_debug(__s.begin(), __s.end(),
__m, __re, __flags); }
// std::basic_string version without match_results
template<typename _Ch_traits, typename _Str_allocator,
typename _Ch_type, typename _Rx_traits>
inline bool
regex_match_debug(const std::basic_string<_Ch_type, _Ch_traits,
_Str_allocator>& __s,
const basic_regex<_Ch_type, _Rx_traits>& __re,
match_flag_type __flags
= std::regex_constants::match_default)
{ return regex_match_debug(__s.begin(), __s.end(), __re, __flags); }
// regex_match_debug behaves like regex_match, but will run *two* executors
// (if there's no back-reference) and check if their results agree. If not,
// an exception throws. One can use them just in the way of using regex_match.
template<typename _Bi_iter, typename _Alloc,
typename _Ch_type, typename _Rx_traits>
bool
regex_search_debug(_Bi_iter __s,
_Bi_iter __e,
match_results<_Bi_iter, _Alloc>& __m,
const basic_regex<_Ch_type, _Rx_traits>& __re,
match_flag_type __flags
= std::regex_constants::match_default)
{
using namespace std::__detail;
auto __res1 = __regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits,
_RegexExecutorPolicy::_S_auto, false>
(__s, __e, __m, __re, __flags);
match_results<_Bi_iter, _Alloc> __mm;
auto __res2 = __regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits,
_RegexExecutorPolicy::_S_alternate, false>
(__s, __e, __mm, __re, __flags);
if (__res1 == __res2 && __m == __mm)
return __res1;
throw(std::exception()); // Let test fail. Give it a name.
}
// No match_results version
template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits>
inline bool
regex_search_debug(_Bi_iter __first,
_Bi_iter __last,
const basic_regex<_Ch_type, _Rx_traits>& __re,
match_flag_type __flags
= std::regex_constants::match_default)
{
match_results<_Bi_iter> __what;
return regex_search_debug(__first, __last, __what, __re, __flags);
}
// C-string version
template<typename _Ch_type, class _Alloc, class _Rx_traits>
inline bool
regex_search_debug(const _Ch_type* __s,
match_results<const _Ch_type*, _Alloc>& __m,
const basic_regex<_Ch_type, _Rx_traits>& __e,
match_flag_type __f
= std::regex_constants::match_default)
{ return regex_search_debug(__s, __s + _Rx_traits::length(__s),
__m, __e, __f); }
// C-string version without match_results
template<typename _Ch_type, typename _Rx_traits>
inline bool
regex_search_debug(const _Ch_type* __s,
const basic_regex<_Ch_type, _Rx_traits>& __e,
match_flag_type __f
= std::regex_constants::match_default)
{ return regex_search_debug(__s, __s + _Rx_traits::length(__s),
__e, __f); }
// std::basic_string version
template<typename _Ch_traits, typename _Ch_alloc,
typename _Alloc, typename _Ch_type,
typename _Rx_traits>
inline bool
regex_search_debug(const std::basic_string<_Ch_type, _Ch_traits,
_Ch_alloc>& __s,
match_results<typename std::basic_string<_Ch_type,
_Ch_traits, _Ch_alloc>::const_iterator, _Alloc>&
__m,
const basic_regex<_Ch_type, _Rx_traits>& __e,
match_flag_type __f
= std::regex_constants::match_default)
{ return regex_search_debug(__s.begin(), __s.end(), __m, __e, __f); }
// std::basic_string version without match_results
template<typename _Ch_traits, typename _String_allocator,
typename _Ch_type, typename _Rx_traits>
inline bool
regex_search_debug(const std::basic_string<_Ch_type, _Ch_traits,
_String_allocator>& __s,
const basic_regex<_Ch_type, _Rx_traits>& __e,
match_flag_type __f
= std::regex_constants::match_default)
{ return regex_search_debug(__s.begin(), __s.end(), __e, __f); }
} // namespace __gnu_test
#endif
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