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refactor: add Rust infrastructure: Option, Result and panic

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This commit is contained in:
yyc12345
2025-06-23 16:22:55 +08:00
parent 28ff7008a8
commit 3abd0969c0
10 changed files with 297 additions and 11 deletions
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35
src/yycc/string/parse.hpp
View File

@ -16,6 +16,7 @@ namespace yycc::string::parse {
// Developer Notes:
// Reference: https://zh.cppreference.com/w/cpp/utility/from_chars
/// @private
/// @brief The error kind when parsing string into number.
enum class ParseError {
PartiallyParsed, ///< Only a part of given string was parsed. The whole string may be invalid.
@ -23,11 +24,20 @@ namespace yycc::string::parse {
OutOfRange, ///< Given string is valid but its value out of the range of given number type.
};
/// @private
/// @brief The return value of internal parse function which ape `std::expected`.
template<typename T, std::enable_if_t<!std::is_same_v<T, ParseError>, int> = 0>
using ParseResult = std::variant<T, ParseError>;
/**
* @private
* @brief priv_parse
* @param strl
* @param fmt
* @return
*/
template<typename T, std::enable_if_t<std::is_floating_point_v<T>, int> = 0>
ParseResult<T> _priv_parse(const NS_YYCC_STRING::u8string_view& strl, std::chars_format fmt) {
ParseResult<T> priv_parse(const NS_YYCC_STRING::u8string_view& strl, std::chars_format fmt) {
namespace reinterpret = NS_YYCC_STRING_REINTERPRET;
T rv;
@ -52,8 +62,15 @@ namespace yycc::string::parse {
}
}
/**
* @private
* @brief priv_parse
* @param strl
* @param base
* @return
*/
template<typename T, std::enable_if_t<std::is_integral_v<T> && !std::is_same_v<T, bool>, int> = 0>
ParseResult<T> _priv_parse(const NS_YYCC_STRING::u8string_view& strl, int base) {
ParseResult<T> priv_parse(const NS_YYCC_STRING::u8string_view& strl, int base) {
namespace reinterpret = NS_YYCC_STRING_REINTERPRET;
T rv;
@ -78,8 +95,14 @@ namespace yycc::string::parse {
}
}
/**
* @private
* @brief priv_parse
* @param strl
* @return
*/
template<typename T, std::enable_if_t<std::is_same_v<T, bool>, int> = 0>
ParseResult<T> _priv_parse(const NS_YYCC_STRING::u8string_view& strl) {
ParseResult<T> priv_parse(const NS_YYCC_STRING::u8string_view& strl) {
// Get lower case
auto lower_case = NS_YYCC_STRING_OP::to_lower(strl);
// Compare result
@ -102,7 +125,7 @@ namespace yycc::string::parse {
bool try_parse(const NS_YYCC_STRING::u8string_view& strl,
T& num,
std::chars_format fmt = std::chars_format::general) {
auto rv = _priv_parse<T>(strl, fmt);
auto rv = priv_parse<T>(strl, fmt);
if (const auto* ptr = std::get_if<T>(rv)) {
num = *ptr;
return true;
@ -125,7 +148,7 @@ namespace yycc::string::parse {
*/
template<typename T, std::enable_if_t<std::is_integral_v<T> && !std::is_same_v<T, bool>, int> = 0>
bool try_parse(const NS_YYCC_STRING::u8string_view& strl, T& num, int base = 10) {
auto rv = _priv_parse<T>(strl, base);
auto rv = priv_parse<T>(strl, base);
if (const auto* ptr = std::get_if<T>(rv)) {
num = *ptr;
return true;
@ -147,7 +170,7 @@ namespace yycc::string::parse {
*/
template<typename T, std::enable_if_t<std::is_same_v<T, bool>, int> = 0>
bool try_parse(const NS_YYCC_STRING::u8string_view& strl, T& num) {
auto rv = _priv_parse<T>(strl);
auto rv = priv_parse<T>(strl);
if (const auto* ptr = std::get_if<T>(rv)) {
num = *ptr;
return true;

6
src/yycc/string/stringify.hpp
View File

@ -15,7 +15,9 @@ namespace yycc::string::stringify {
// Reference: https://en.cppreference.com/w/cpp/utility/to_chars
// Default float precision = 6 is gotten from: https://en.cppreference.com/w/c/io/fprintf
/// @private
inline constexpr size_t STRINGIFY_BUFFER_SIZE = 64u;
/// @private
using StringifyBuffer = std::array<NS_YYCC_STRING::u8char, STRINGIFY_BUFFER_SIZE>;
/**
@ -41,7 +43,7 @@ namespace yycc::string::stringify {
return NS_YYCC_STRING::u8string(buffer.data(),
reinterpret::as_utf8(ptr) - buffer.data());
} else if (ec == std::errc::value_too_large) {
// Too short buffer. This should not happened
// Too short buffer. This should not happen.
throw std::out_of_range("stringify() buffer is not sufficient.");
} else {
// Unreachable
@ -67,7 +69,7 @@ namespace yycc::string::stringify {
return NS_YYCC_STRING::u8string(buffer.data(),
reinterpret::as_utf8(ptr) - buffer.data());
} else if (ec == std::errc::value_too_large) {
// Too short buffer. This should not happened
// Too short buffer. This should not happen.
throw std::out_of_range("stringify() buffer is not sufficient.");
} else {
// Unreachable