src/third_party/llvm-project/libcxx/test/std/re/re.alg/re.alg.match/inverted_character_classes.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <regex>
// UNSUPPORTED: c++98, c++03

// Make sure that we correctly match inverted character classes.

#include <cassert>
#include <regex>


int main() {
    assert(std::regex_match("X", std::regex("[X]")));
    assert(std::regex_match("X", std::regex("[XY]")));
    assert(!std::regex_match("X", std::regex("[^X]")));
    assert(!std::regex_match("X", std::regex("[^XY]")));

    assert(std::regex_match("X", std::regex("[\\S]")));
    assert(!std::regex_match("X", std::regex("[^\\S]")));

    assert(!std::regex_match("X", std::regex("[\\s]")));
    assert(std::regex_match("X", std::regex("[^\\s]")));

    assert(std::regex_match("X", std::regex("[\\s\\S]")));
    assert(std::regex_match("X", std::regex("[^Y\\s]")));
    assert(!std::regex_match("X", std::regex("[^X\\s]")));

    assert(std::regex_match("X", std::regex("[\\w]")));
    assert(std::regex_match("_", std::regex("[\\w]")));
    assert(!std::regex_match("X", std::regex("[^\\w]")));
    assert(!std::regex_match("_", std::regex("[^\\w]")));

    assert(!std::regex_match("X", std::regex("[\\W]")));
    assert(!std::regex_match("_", std::regex("[\\W]")));
    assert(std::regex_match("X", std::regex("[^\\W]")));
    assert(std::regex_match("_", std::regex("[^\\W]")));
}