Next (#1158)

* move print_freestanding to impl.h

* impl

* [print] move print_freestanding to a seperate directory to revamp it

* special

* add license and license-zhCN.txt for anti-tivoization

* [core] Fix warnings for codecvt for clang for charxx_t

Author: trcrsired

include/fast_io_core_impl/codecvt/general.h

@@ -184,7 +184,7 @@ general_code_cvt(src_char_type const *src_first, src_char_type const *src_last,
 				}
 				else
 				{
-					dst += get_utf_code_units<encoding>(code, dst);
+					dst += get_utf_code_units<encoding>(static_cast<char32_t>(code), dst);
 				}
 			}
 		}
@@ -278,7 +278,7 @@ general_code_cvt(src_char_type const *src_first, src_char_type const *src_last,
 					}
 					else
 					{
-						*dst = static_cast<char8_t>(*src_first);
+						*dst = static_cast<dest_char_type>(static_cast<char8_t>(*src_first));
 					}
 					if constexpr (sizeof(dest_char_type) != 1 && encoding_is_utf(encoding) &&
 								  !is_native_scheme(encoding))

include/fast_io_core_impl/literals/literal.h

@@ -86,21 +86,21 @@ inline constexpr char_type char_literal_add(T offs) noexcept
 	}
 #endif
 	using unsigned_char_type = ::std::make_unsigned_t<char_type>;
-	using unsigned_result_type =
-		::std::make_unsigned_t<::std::remove_cvref_t<decltype(arithmetic_char_literal_v<ch, char_type> + offs)>>;
+	using common_chtype = ::std::common_type_t<char_type, decltype(ch)>;
+	using unsigned_result_type = ::std::make_unsigned_t<::std::remove_cvref_t<decltype(static_cast<common_chtype>(arithmetic_char_literal_v<ch, char_type>) + offs)>>;
 	if constexpr (::std::same_as<char_type, wchar_t> && ::fast_io::details::wide_is_none_utf_endian)
 	{
 		static_assert(::std::numeric_limits<::std::uint_least8_t>::digits <= ::std::numeric_limits<wchar_t>::digits);
 		constexpr unsigned leftshift_offset{static_cast<unsigned>(::std::numeric_limits<wchar_t>::digits -
 																  ::std::numeric_limits<::std::uint_least8_t>::digits)};
 		return static_cast<char_type>(static_cast<unsigned_char_type>(static_cast<unsigned_result_type>(
-										  arithmetic_char_literal_v<ch, char_type> + offs))
+										  static_cast<common_chtype>(arithmetic_char_literal_v<ch, char_type>) + offs))
 									  << leftshift_offset);
 	}
 	else
 	{
 		return static_cast<char_type>(static_cast<unsigned_char_type>(
-			static_cast<unsigned_result_type>(arithmetic_char_literal_v<ch, char_type> + offs)));
+			static_cast<unsigned_result_type>(static_cast<common_chtype>(arithmetic_char_literal_v<ch, char_type>) + offs)));
 	}
 }