string_view.hpp

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#ifndef NEFORCE_CORE_STRING_STRING_VIEW_HPP__
#define NEFORCE_CORE_STRING_STRING_VIEW_HPP__

 
#include "NeForce/core/string/basic_string_view.hpp"
NEFORCE_BEGIN_NAMESPACE__


using string_view = basic_string_view<char>;

using wstring_view = basic_string_view<wchar_t>;
 
#if defined(NEFORCE_STANDARD_20) || defined(NEXUSFORCE_ENABLE_DOXYGEN)
using u8string_view = basic_string_view<char8_t>;
#endif // NEFORCE_STANDARD_20

using u16string_view = basic_string_view<char16_t>;

using u32string_view = basic_string_view<char32_t>;
 // StringView
 
 
NEFORCE_BEGIN_LITERALS__


NEFORCE_NODISCARD constexpr string_view operator""_sv(const char* str, size_t len) noexcept { return {str, len}; }

NEFORCE_NODISCARD constexpr wstring_view operator""_sv(const wchar_t* str, size_t len) noexcept { return {str, len}; }
 
#if defined(NEFORCE_STANDARD_20) || defined(NEXUSFORCE_ENABLE_DOXYGEN)
NEFORCE_NODISCARD constexpr u8string_view operator""_sv(const char8_t* str, size_t len) noexcept { return {str, len}; }
#endif // NEFORCE_STANDARD_20

NEFORCE_NODISCARD constexpr u16string_view operator""_sv(const char16_t* str, size_t len) noexcept {
    return {str, len};
}

NEFORCE_NODISCARD constexpr u32string_view operator""_sv(const char32_t* str, size_t len) noexcept {
    return {str, len};
}
 // UserLiterals
 
NEFORCE_END_LITERALS__
 


template <typename CharT>
constexpr bool getline(const basic_string_view<CharT> data, size_t& pos, basic_string_view<CharT>& str,
                       CharT delim = static_cast<CharT>('\n')) {
 
    if (pos >= data.size()) {
        str = basic_string_view<CharT>();
        return false;
    }
 
    size_t start = pos;
    size_t end = pos;
    while (end < data.size() && data[end] != delim) {
        ++end;
    }
    str = data.substr(start, end - start);
    pos = (end < data.size()) ? end + 1 : end;
 
    return true;
}

template <typename CharT, typename Pred>
constexpr bool getline(
        const basic_string_view<CharT> data, size_t& pos, basic_string_view<CharT>& str,
        Pred split = [](const CharT ch) { return ch == static_cast<CharT>('\n'); }) {
 
    if (pos >= data.size()) {
        str = basic_string_view<CharT>();
        return false;
    }
 
    size_t start = pos;
    size_t end = pos;
    while (end < data.size() && !split(data[end])) {
        ++end;
    }
    str = data.substr(start, end - start);
    pos = (end < data.size()) ? end + 1 : end;
 
    return true;
}
 // StringView
 
NEFORCE_END_NAMESPACE__
#endif // NEFORCE_CORE_STRING_STRING_VIEW_HPP__