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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <regex>
// Test that replacing zero-length matches works correctly.
#include <cassert>
#include <regex>
#include <string>
#include "test_macros.h"
int main(int, char**) {
// Various patterns that produce zero-length matches.
assert(std::regex_replace("abc", std::regex(""), "!") == "!a!b!c!");
assert(std::regex_replace("abc", std::regex("X*"), "!") == "!a!b!c!");
assert(std::regex_replace("abc", std::regex("X{0,3}"), "!") == "!a!b!c!");
// Replacement string has several characters.
assert(std::regex_replace("abc", std::regex(""), "[!]") == "[!]a[!]b[!]c[!]");
// Empty replacement string.
assert(std::regex_replace("abc", std::regex(""), "") == "abc");
// Empty input.
assert(std::regex_replace("", std::regex(""), "!") == "!");
// Not all matches are zero-length.
assert(std::regex_replace("abCabCa", std::regex("C*"), "!") == "!a!b!!a!b!!a!");
return 0;
}
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