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59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <locale>
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// template <class Facet> const Facet& use_facet(const locale& loc);
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#include <locale>
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#include <cassert>
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#include "test_macros.h"
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int facet_count = 0;
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struct my_facet
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: public std::locale::facet
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{
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static std::locale::id id;
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bool im_alive;
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my_facet() : im_alive(true) {++facet_count;}
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~my_facet() {im_alive = false; --facet_count;}
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};
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std::locale::id my_facet::id;
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int main(int, char**)
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{
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#ifndef TEST_HAS_NO_EXCEPTIONS
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try
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{
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const my_facet& f = std::use_facet<my_facet>(std::locale());
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((void)f); // Prevent unused warning
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assert(false);
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}
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catch (std::bad_cast&)
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{
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}
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#endif
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const my_facet* fp = 0;
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{
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std::locale loc(std::locale(), new my_facet);
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const my_facet& f = std::use_facet<my_facet>(loc);
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assert(f.im_alive);
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fp = &f;
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assert(fp->im_alive);
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assert(facet_count == 1);
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}
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assert(facet_count == 0);
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return 0;
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}
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