generic-library/ChaiScript
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clean-up conversion for other than std:string

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This commit is contained in:
ELynx 2016-06-27 16:03:32 +03:00
parent 830b7c93ca
commit 58ebb22c55
1 changed files with 21 additions and 8 deletions
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25
include/chaiscript/language/chaiscript_parser.hpp
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@ -15,6 +15,8 @@
#include <vector>
#include <cctype>
#include <cstring>
#include <locale>
#include <codecvt>
@ -56,25 +58,36 @@ namespace chaiscript
, lengthof_alphabet = 256
};
// Generic for u16, u32 and (probably) wchar
// Generic for u16, u32 and wchar
template<typename string_type>
struct Char_Parser_Helper
{
typedef typename string_type::value_type target_char_type;
static string_type str_from_ll(long long val)
{
return string_type(1, string_type::value_type(val)); //size, character
// make proper UTF-8 string
const std::string intermediate = Char_Parser_Helper<std::string>::str_from_ll(val);
// prepare converter
std::wstring_convert<std::codecvt_utf8<target_char_type>, target_char_type> converter;
// convert
const string_type result = converter.from_bytes(intermediate);
return result;
}
};
// Specialization for char
// Specialization for char AKA UTF-8
template<>
struct Char_Parser_Helper<std::string>
{
typedef std::string::value_type char_type;
static std::string str_from_ll(long long val)
{
std::string::value_type c[2];
c[1] = std::string::value_type(val);
c[0] = std::string::value_type(val >> 8);
char_type c[2];
c[1] = char_type(val);
c[0] = char_type(val >> 8);
if (c[0] == 0)
{