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// file : tests/regex/driver.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#include <regex>
#include <string>
#include <utility> // pair
#include <iostream>
#include <stdexcept> // invalid_argument
#include <exception>
#include <libbutl/regex.hxx>
#include <libbutl/utility.hxx> // operator<<(ostream, exception)
#undef NDEBUG
#include <cassert>
using namespace std;
using namespace butl;
// Usage: argv[0] [-ffo] [-fnc] [-m] <string> "/<regex>/<format>/"
//
// Perform substitution of matched substrings with formatted replacement
// strings using regex_replace_*() functions. If the string matches the regex
// then print the replacement to STDOUT and exit with zero code. Exit with
// code one if it doesn't match, and with code two on failure (print error
// description to STDERR).
//
// -ffo
// Use format_first_only replacement flag.
//
// -fnc
// Use format_no_copy replacement flag.
//
// -m
// Match the entire string, rather than its sub-strings.
//
int
main (int argc, const char* argv[])
try
{
regex_constants::match_flag_type fl (regex_constants::match_default);
int i (1);
bool match (false);
for (; i != argc; ++i)
{
string op (argv[i]);
if (op == "-ffo")
fl |= regex_constants::format_first_only;
else if (op == "-fnc")
fl |= regex_constants::format_no_copy;
else if (op == "-m")
match = true;
else
break;
}
assert (i + 2 == argc);
string s (argv[i++]);
pair<regex, string> rf (regex_replace_parse (argv[i]));
const regex& re (rf.first);
const string& fmt (rf.second);
auto r (match
? regex_replace_match (s, re, fmt)
: regex_replace_search (s, re, fmt, fl));
if (r.second)
cout << r.first << endl;
return r.second ? 0 : 1;
}
catch (const regex_error& e)
{
cerr << "invalid regex" << e << endl; // Print sanitized.
return 2;
}
catch (const invalid_argument& e)
{
cerr << e << endl;
return 2;
}
catch (const exception&)
{
assert (false);
return 2;
}
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