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https://github.com/autc04/Retro68.git
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81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
// Copyright (C) 2017-2019 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-options "-std=gnu++17" }
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// { dg-do run { target c++17 } }
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#include <charconv>
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#include <string_view>
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template<typename I>
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bool
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check_from_chars(I expected, std::string_view s, int base = 0, char term = '\0')
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{
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I val;
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std::from_chars_result r = base == 0
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? std::from_chars(s.begin(), s.end(), val)
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: std::from_chars(s.begin(), s.end(), val, base);
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return r.ec == std::errc{} && (r.ptr == s.end() || *r.ptr == term) && val == expected;
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}
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#include <climits>
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#include <testsuite_hooks.h>
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void
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test01()
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{
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// Using base 10
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VERIFY( check_from_chars(123, "123") );
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VERIFY( check_from_chars(-123, "-123") );
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VERIFY( check_from_chars(123, "123a", 10, 'a') );
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VERIFY( check_from_chars(123, "0000000000000000000000000000123") );
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VERIFY( check_from_chars(123, "0000000000000000000000000000123a", 10, 'a') );
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}
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void
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test02()
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{
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// "0x" parsed as "0" not as hex prefix:
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VERIFY( check_from_chars(0, "0x1", 10, 'x') );
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VERIFY( check_from_chars(0, "0X1", 10, 'X') );
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VERIFY( check_from_chars(0, "0x1", 16, 'x') );
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VERIFY( check_from_chars(0, "0X1", 16, 'X') );
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VERIFY( check_from_chars(1155, "xx", 34) );
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VERIFY( check_from_chars(1155, "XX", 34) );
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VERIFY( check_from_chars(1155, "Xx", 34) );
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VERIFY( check_from_chars(1224, "yy", 35) );
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VERIFY( check_from_chars(1224, "YY", 35) );
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VERIFY( check_from_chars(1224, "yY", 35) );
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VERIFY( check_from_chars(1295, "zz", 36) );
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VERIFY( check_from_chars(1295, "ZZ", 36) );
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VERIFY( check_from_chars(1295, "Zz", 36) );
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// Parsing stops at first invalid digit for the given base:
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VERIFY( check_from_chars(1, "01234", 2, '2') );
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VERIFY( check_from_chars(27, "1234", 4, '4') );
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VERIFY( check_from_chars(1155, "xxy", 34, 'y') );
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VERIFY( check_from_chars(1224, "yyz", 35, 'z') );
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}
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int
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main()
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{
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test01();
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test02();
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}
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