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// file : libbutl/regex.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef __cpp_modules_ts
#include <libbutl/regex.mxx>
#endif
// C includes.
#ifndef __cpp_lib_modules_ts
#include <regex>
#include <string>
#include <ostream>
#include <sstream>
#include <stdexcept> // runtime_error
#if defined(_MSC_VER) && _MSC_VER < 2000
# include <cstring> // strstr()
#endif
#endif
// Other includes.
#ifdef __cpp_modules_ts
module butl.regex;
// Only imports additional to interface.
#ifdef __clang__
#ifdef __cpp_lib_modules_ts
import std.core;
import std.io;
import std.regex;
#endif
#endif
import butl.utility; // operator<<(ostream, exception)
#else
#include <libbutl/utility.mxx>
#endif
namespace std
{
// Currently libstdc++ just returns the name of the exception (bug #67361).
// So we check that the description contains at least one space character.
//
// While VC's description is meaningful, it has an undesired prefix that
// resembles the following: 'regex_error(error_badrepeat): '. So we skip it.
//
ostream&
operator<< (ostream& o, const regex_error& e)
{
const char* d (e.what ());
#if defined(_MSC_VER) && _MSC_VER < 2000
// Note: run the regex test like this to check new VC version:
//
// ./driver.exe a '{' b
//
const char* rd (strstr (d, "): "));
if (rd != nullptr)
d = rd + 3;
#endif
ostringstream os;
os << runtime_error (d); // Sanitize the description.
string s (os.str ());
if (s.find (' ') != string::npos)
o << ": " << s;
return o;
}
}
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