95 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <locale>10 11// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_CODECVT -D_LIBCPP_ENABLE_CXX26_REMOVED_WSTRING_CONVERT12 13// wbuffer_convert<Codecvt, Elem, Tr>14 15// int_type underflow();16 17// This test is not entirely portable18 19// XFAIL: no-wide-characters20 21#include <locale>22#include <cassert>23#include <codecvt>24#include <sstream>25 26#include "test_macros.h"27 28struct test_buf29 : public std::wbuffer_convert<std::codecvt_utf8<wchar_t> >30{31 typedef std::wbuffer_convert<std::codecvt_utf8<wchar_t> > base;32 typedef base::char_type char_type;33 typedef base::int_type int_type;34 typedef base::traits_type traits_type;35 36 explicit test_buf(std::streambuf* sb) : base(sb) {}37 38 char_type* eback() const {return base::eback();}39 char_type* gptr() const {return base::gptr();}40 char_type* egptr() const {return base::egptr();}41 void gbump(int n) {base::gbump(n);}42 43 virtual int_type underflow() {return base::underflow();}44};45 46int main(int, char**)47{48 {49 std::string s = "123456789";50 std::istringstream bs(s);51 test_buf f(bs.rdbuf());52 assert(f.eback() == 0);53 assert(f.gptr() == 0);54 assert(f.egptr() == 0);55 assert(f.underflow() == L'1');56 assert(f.eback() != 0);57 assert(f.eback() == f.gptr());58 assert(*f.gptr() == L'1');59 assert(f.egptr() - f.eback() == 9);60 }61 {62 std::string s = "123456789";63 std::istringstream bs(s);64 test_buf f(bs.rdbuf());65 assert(f.eback() == 0);66 assert(f.gptr() == 0);67 assert(f.egptr() == 0);68 assert(f.underflow() == L'1');69 assert(f.eback() != 0);70 assert(f.eback() == f.gptr());71 assert(*f.gptr() == L'1');72 assert(f.egptr() - f.eback() == 9);73 f.gbump(8);74 assert(f.sgetc() == L'9');75 assert(f.eback()[0] == L'1');76 assert(f.eback()[1] == L'2');77 assert(f.eback()[2] == L'3');78 assert(f.eback()[3] == L'4');79 assert(f.gptr() - f.eback() == 8);80 assert(*f.gptr() == L'9');81 assert(f.egptr() - f.gptr() == 1);82 }83 {84 std::string s = "乑乒乓";85 std::istringstream bs(s);86 test_buf f(bs.rdbuf());87 assert(f.sbumpc() == 0x4E51);88 assert(f.sbumpc() == 0x4E52);89 assert(f.sbumpc() == 0x4E53);90 assert(f.sbumpc() == test_buf::traits_type::eof());91 }92 93 return 0;94}95