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libcxx/test/std/diagnostics/syserr/syserr.errcat/syserr.errcat.derived/message.pass.cpp

35 lines
912 B
C++

//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// <system_error>
// class error_category
// virtual string message(int ev) const = 0;
#include <system_error>
#include <cassert>
#include <string>
#include <stdio.h>
int main()
{
const std::error_category& e_cat1 = std::generic_category();
const std::error_category& e_cat2 = std::system_category();
std::string m1 = e_cat1.message(5);
std::string m2 = e_cat2.message(5);
std::string m3 = e_cat2.message(6);
assert(!m1.empty());
assert(!m2.empty());
assert(!m3.empty());
assert(m1 == m2);
assert(m1 != m3);
}