| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // XFAIL: with_system_cxx_lib=macosx10.14 |
| // XFAIL: with_system_cxx_lib=macosx10.13 |
| // XFAIL: with_system_cxx_lib=macosx10.12 |
| // XFAIL: with_system_cxx_lib=macosx10.11 |
| // XFAIL: with_system_cxx_lib=macosx10.10 |
| // XFAIL: with_system_cxx_lib=macosx10.9 |
| |
| // <istream> |
| |
| // template <class charT, class traits = char_traits<charT> > |
| // class basic_istream; |
| |
| // operator>>(long double& val); |
| |
| #include <istream> |
| #include <cassert> |
| #include "test_macros.h" |
| |
| template <class CharT> |
| struct testbuf |
| : public std::basic_streambuf<CharT> |
| { |
| typedef std::basic_string<CharT> string_type; |
| typedef std::basic_streambuf<CharT> base; |
| private: |
| string_type str_; |
| public: |
| |
| testbuf() {} |
| testbuf(const string_type& str) |
| : str_(str) |
| { |
| base::setg(const_cast<CharT*>(str_.data()), |
| const_cast<CharT*>(str_.data()), |
| const_cast<CharT*>(str_.data()) + str_.size()); |
| } |
| |
| CharT* eback() const {return base::eback();} |
| CharT* gptr() const {return base::gptr();} |
| CharT* egptr() const {return base::egptr();} |
| }; |
| |
| int main(int, char**) |
| { |
| { |
| std::istream is((std::streambuf*)0); |
| long double n = 0; |
| is >> n; |
| assert(is.fail()); |
| } |
| { |
| testbuf<char> sb("0"); |
| std::istream is(&sb); |
| long double n = 10; |
| is >> n; |
| assert(n == 0); |
| assert( is.eof()); |
| assert(!is.fail()); |
| } |
| { |
| testbuf<char> sb(" 123 "); |
| std::istream is(&sb); |
| long double n = 10; |
| is >> n; |
| assert(n == 123); |
| assert(!is.eof()); |
| assert(!is.fail()); |
| } |
| { |
| testbuf<wchar_t> sb(L" -123.5 "); |
| std::wistream is(&sb); |
| long double n = 10; |
| is >> n; |
| assert(n == -123.5); |
| assert(!is.eof()); |
| assert(!is.fail()); |
| } |
| #ifndef TEST_HAS_NO_EXCEPTIONS |
| { |
| testbuf<char> sb; |
| std::basic_istream<char> is(&sb); |
| is.exceptions(std::ios_base::failbit); |
| |
| bool threw = false; |
| try { |
| long double n = 0; |
| is >> n; |
| } catch (std::ios_base::failure const&) { |
| threw = true; |
| } |
| |
| assert(!is.bad()); |
| assert(is.fail()); |
| assert(is.eof()); |
| assert(threw); |
| } |
| { |
| testbuf<char> sb; |
| std::basic_istream<char> is(&sb); |
| is.exceptions(std::ios_base::eofbit); |
| |
| bool threw = false; |
| try { |
| long double n = 0; |
| is >> n; |
| } catch (std::ios_base::failure const&) { |
| threw = true; |
| } |
| |
| assert(!is.bad()); |
| assert(is.fail()); |
| assert(is.eof()); |
| assert(threw); |
| } |
| #endif // TEST_HAS_NO_EXCEPTIONS |
| |
| return 0; |
| } |