banan-os/BAN/include/BAN/StringView.h

#pragma once

#include <BAN/Forward.h>
#include <BAN/Formatter.h>

namespace BAN
{

	class StringView
	{
	public:
		using size_type = size_t;

	public:
		StringView();
		StringView(const String&);
		StringView(const char*, size_type = -1);

		char operator[](size_type) const;

		bool operator==(const String&) const;
		bool operator==(StringView) const;
		bool operator==(const char*) const;

		StringView Substring(size_type, size_type = -1) const;

		ErrorOr<Vector<StringView>> Split(char, bool = false);
		ErrorOr<Vector<StringView>> Split(bool(*comp)(char), bool = false);

		size_type Count(char) const;

		bool Empty() const;
		size_type Size() const;
		
		const char* Data() const;

	private:
		const char*	m_data = nullptr;
		size_type	m_size = 0;
	};

}

namespace BAN::Formatter
{

	template<void(*PUTC_LIKE)(char)> void print_argument_impl(const StringView& sv, const ValueFormat&)
	{
		for (StringView::size_type i = 0; i < sv.Size(); i++)
			PUTC_LIKE(sv[i]);
	}

}