from_chars.h

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#pragma once
 
#include <string>
#include <system_error>
 
namespace cras
{
 
enum chars_format
{
  scientific = 1 << 0,
  fixed = 1 << 2,
  hex = 1 << 3,
  general = fixed | scientific
};
 
struct from_chars_result
{
  const char* ptr;
  ::std::errc ec;
};
 
::cras::from_chars_result from_chars(const char* first, const char* last, float& value,
  ::cras::chars_format fmt = ::cras::chars_format::general) noexcept;
 
::cras::from_chars_result from_chars(const char* first, const char* last, double& value,
  ::cras::chars_format fmt = ::cras::chars_format::general) noexcept;
 
inline ::cras::from_chars_result from_chars(const ::std::string& string, float& value,
  ::cras::chars_format fmt = ::cras::chars_format::general) noexcept
{
  return ::cras::from_chars(string.data(), string.data() + string.size(), value, fmt);
}
 
inline ::cras::from_chars_result from_chars(const ::std::string& string, double& value,
  ::cras::chars_format fmt = ::cras::chars_format::general) noexcept
{
  return ::cras::from_chars(string.data(), string.data() + string.size(), value, fmt);
}
 
}