yyc12345/YYCCommonplace
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refactor: finish Windows encoding namespace.

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- finish Windows encoding namespace.
- add std::expected polyfill for help.
This commit is contained in:
yyc12345
2025-07-14 15:06:33 +08:00
parent fa52d7416f
commit 3605151caf
8 changed files with 425 additions and 56 deletions
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44
src/yycc/num/parse.hpp
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@ -1,15 +1,15 @@
#pragma once
#include "../patch/expected.hpp"
#include "../string.hpp"
#include "../string/op.hpp"
#include "../string/reinterpret.hpp"
#include <charconv>
#include <stdexcept>
#include <type_traits>
#include <variant>
#define NS_YYCC_STRING ::yycc::string
#define NS_YYCC_STRING_REINTERPRET ::yycc::string::reinterpret
#define NS_YYCC_STRING_OP ::yycc::string::op
#define NS_YYCC_PATCH_EXPECTED ::yycc::patch::expected
/**
* @brief Provides string parsing utilities for converting strings to numeric and boolean values.
@ -30,8 +30,8 @@ namespace yycc::num::parse {
/// @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>;
template<typename T>
using ParseResult = NS_YYCC_PATCH_EXPECTED::Expected<T, ParseError>;
/**
* @private
@ -132,15 +132,14 @@ namespace yycc::num::parse {
bool try_parse(const NS_YYCC_STRING::u8string_view& strl,
T& num,
std::chars_format fmt = std::chars_format::general) {
namespace expected = NS_YYCC_PATCH_EXPECTED;
auto rv = priv_parse<T>(strl, fmt);
if (const auto* ptr = std::get_if<T>(&rv)) {
num = *ptr;
if (expected::is_value(rv)) {
num = expected::get_value(rv);
return true;
} else if (const auto* ptr = std::get_if<ParseError>(&rv)) {
return false;
} else {
// Unreachable
throw std::runtime_error("unreachable code.");
return false;
}
}
/**
@ -155,15 +154,14 @@ namespace yycc::num::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) {
namespace expected = NS_YYCC_PATCH_EXPECTED;
auto rv = priv_parse<T>(strl, base);
if (const auto* ptr = std::get_if<T>(&rv)) {
num = *ptr;
if (expected::is_value(rv)) {
num = expected::get_value(rv);
return true;
} else if (const auto* ptr = std::get_if<ParseError>(&rv)) {
return false;
} else {
// Unreachable
throw std::runtime_error("unreachable code.");
return false;
}
}
/**
@ -177,15 +175,14 @@ namespace yycc::num::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) {
namespace expected = NS_YYCC_PATCH_EXPECTED;
auto rv = priv_parse<T>(strl);
if (const auto* ptr = std::get_if<T>(&rv)) {
num = *ptr;
if (expected::is_value(rv)) {
num = expected::get_value(rv);
return true;
} else if (const auto* ptr = std::get_if<ParseError>(&rv)) {
return false;
} else {
// Unreachable
throw std::runtime_error("unreachable code.");
return false;
}
}
@ -241,8 +238,9 @@ namespace yycc::num::parse {
else throw std::invalid_argument("can not parse given string");
}
} // namespace yycc::string::parse
} // namespace yycc::num::parse
#undef NS_YYCC_PATCH_EXPECTED
#undef NS_YYCC_STRING_OP
#undef NS_YYCC_STRING_REINTERPRET
#undef NS_YYCC_STRING