icarus::details::KeyValuesConverter< T, Enable > Struct Template Reference

#include <KeyValuesData.h>

std::optional< T >	operator() (std::string const &s) const
static std::optional< T >	convert (std::string const &s)

Detailed Description

template<typename T, typename Enable = void>
struct icarus::details::KeyValuesConverter< T, Enable >

Definition at line 32 of file KeyValuesData.h.

Member Function Documentation

template<typename T , typename Enable = void>

static std::optional<T> icarus::details::KeyValuesConverter< T, Enable >::convert ( std::string const &  s )

inlinestatic

Definition at line 823 of file KeyValuesData.h.

    {
      if constexpr (std::is_arithmetic_v<T>) {
        T number {}; // useless initialization to avoid GCC complains
        char const *b = s.data(), *e = b + s.length();
        return (std::from_chars(b, e, number).ptr == e)
          ? std::make_optional(number): std::nullopt;
      }
      else if constexpr(std::is_constructible_v<T, std::string>){
        return std::make_optional(T{ s });
      }
      else return std::nullopt;
    } // convert()

template<typename T , typename Enable = void>

std::optional<T> icarus::details::KeyValuesConverter< T, Enable >::operator() ( std::string const &  s ) const

inline

Convert a string s into a type T; may return std::nullopt on "non-fatal" failure.

Definition at line 820 of file KeyValuesData.h.

    { return convert(s); }

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The documentation for this struct was generated from the following file:

• KeyValuesData.h