Source/cmArgumentParserTypes.h

   1 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   2    file Copyright.txt or https://cmake.org/licensing for details.  */
   3 #pragma once
   4
   5 #include "cmConfigure.h" // IWYU pragma: keep
   6
   7 #if defined(__SUNPRO_CC) || defined(__EDG__)
   8
   9 #  include <string>
  10 #  include <vector>
  11
  12 namespace ArgumentParser {
  13
  14 template <typename T>
  15 struct Maybe;
  16 template <>
  17 struct Maybe<std::string> : public std::string
  18 {
  19   using std::string::basic_string;
  20 };
  21
  22 template <typename T>
  23 struct MaybeEmpty;
  24 template <typename T>
  25 struct MaybeEmpty<std::vector<T>> : public std::vector<T>
  26 {
  27   using std::vector<T>::vector;
  28 };
  29
  30 template <typename T>
  31 struct NonEmpty;
  32 template <typename T>
  33 struct NonEmpty<std::vector<T>> : public std::vector<T>
  34 {
  35   using std::vector<T>::vector;
  36 };
  37 template <>
  38 struct NonEmpty<std::string> : public std::string
  39 {
  40   using std::string::basic_string;
  41 };
  42
  43 } // namespace ArgumentParser
  44
  45 #else
  46
  47 namespace ArgumentParser {
  48
  49 template <typename T>
  50 struct Maybe : public T
  51 {
  52   using T::T;
  53 };
  54
  55 template <typename T>
  56 struct MaybeEmpty : public T
  57 {
  58   using T::T;
  59 };
  60
  61 template <typename T>
  62 struct NonEmpty : public T
  63 {
  64   using T::T;
  65 };
  66
  67 } // namespace ArgumentParser
  68
  69 #endif