libcxx/test/support/parse_integer.h

   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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LIBCPP_TEST_SUPPORT_PARSE_INTEGER_H
  10 #define LIBCPP_TEST_SUPPORT_PARSE_INTEGER_H
  11
  12 #include <string>
  13
  14 namespace detail {
  15 template <class T>
  16 struct parse_integer_impl;
  17
  18 template <>
  19 struct parse_integer_impl<int> {
  20     template <class CharT>
  21     int operator()(std::basic_string<CharT> const& str) const {
  22         return std::stoi(str);
  23     }
  24 };
  25
  26 template <>
  27 struct parse_integer_impl<long> {
  28     template <class CharT>
  29     long operator()(std::basic_string<CharT> const& str) const {
  30         return std::stol(str);
  31     }
  32 };
  33
  34 template <>
  35 struct parse_integer_impl<long long> {
  36     template <class CharT>
  37     long long operator()(std::basic_string<CharT> const& str) const {
  38         return std::stoll(str);
  39     }
  40 };
  41
  42 template <>
  43 struct parse_integer_impl<unsigned int> {
  44     template <class CharT>
  45     unsigned int operator()(std::basic_string<CharT> const& str) const {
  46         return std::stoul(str);
  47     }
  48 };
  49
  50 template <>
  51 struct parse_integer_impl<unsigned long> {
  52     template <class CharT>
  53     unsigned long operator()(std::basic_string<CharT> const& str) const {
  54         return std::stoul(str);
  55     }
  56 };
  57
  58 template <>
  59 struct parse_integer_impl<unsigned long long> {
  60     template <class CharT>
  61     unsigned long long operator()(std::basic_string<CharT> const& str) const {
  62         return std::stoull(str);
  63     }
  64 };
  65 } // end namespace detail
  66
  67 template <class T, class CharT>
  68 T parse_integer(std::basic_string<CharT> const& str) {
  69     return detail::parse_integer_impl<T>()(str);
  70 }
  71
  72 #endif // LIBCPP_TEST_SUPPORT_PARSE_INTEGER_H