__boolean_formatter.h

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#pragma once
#if !defined(__XTD_CORE_INTERNAL__)
#error "Do not include this file: Internal use only"
#endif
 
#include "__numeric_formatter.h"
#include "__format_exception.h"
 
 
template<typename char_t>
inline std::basic_string<char_t> __boolean_formatter(const std::basic_string<char_t>& fmt, bool value, const std::locale& loc) {
  if (fmt.empty()) return value ? std::basic_string<char_t> {'t', 'r', 'u', 'e'} : std::basic_string<char_t> {'f', 'a', 'l', 's', 'e'};
  
  switch (fmt[0]) {
    case 'b':
    case 'B':
    case 'd':
    case 'D':
    case 'o':
    case 'O':
    case 'x':
    case 'X': return __numeric_formatter(fmt, value ? 1 : 0, loc);
    case 'g':
    case 'G': return value ? std::basic_string<char_t> {'t', 'r', 'u', 'e'} : std::basic_string<char_t> {'f', 'a', 'l', 's', 'e'};
    default: __format_exception("Invalid format expression"); return {};
  }
}