fixed_string.h

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#pragma once
 
#include "di/types/size_t.h"
 
namespace di::container {
template<types::size_t count>
class FixedString {
public:
    char m_data[count + 1];
 
    constexpr FixedString(char const (&data)[count + 1]) {
        for (types::size_t i = 0; i < count; i++) {
            m_data[i] = data[i];
        }
        m_data[count] = '\0';
    }
 
    constexpr auto data() const -> char const* { return m_data; }
    constexpr static auto size() { return count; }
 
    constexpr auto begin() const -> char const* { return m_data; }
    constexpr auto end() const -> char const* { return m_data + count; }
 
    template<types::size_t other_size>
    requires(count != other_size)
    constexpr friend auto operator==(FixedString const&, FixedString<other_size> const&) -> bool {
        return false;
    }
 
    auto operator==(FixedString const&) const -> bool = default;
    auto operator<=>(FixedString const&) const = default;
};
 
template<types::size_t size>
FixedString(char const (&)[size]) -> FixedString<size - 1>;
}
 
namespace di {
using container::FixedString;
}