uuid.cpp

#define SPROUT_CONFIG_SUPPORT_TEMPORARY_CONTAINER_ITERATION

#include <iostream>
#include <sprout/string.hpp>
#include <sprout/weed.hpp>

int main() {
	using sprout::weed::hex8f;	// matching a 8-bit hex
	using sprout::weed::repeat;	// repeat directive
	using sprout::weed::lim;	// set the limits of repeat (because variable length containers cannot handling)
	using sprout::weed::eoi;	// matching EOI
	using sprout::weed::parse;	// parsing function

	// generate uuid parser
	static constexpr auto unseparated_uuid_p
		= repeat[lim<16>(hex8f)]
		;
	static constexpr auto separated_uuid_p
		= repeat[lim<4>(hex8f)]
		>> '-' >> repeat[lim<2>(hex8f)]
		>> '-' >> repeat[lim<2>(hex8f)]
		>> '-' >> repeat[lim<2>(hex8f)]
		>> '-' >> repeat[lim<6>(hex8f)]
		;
	static constexpr auto unbracketed_uuid_p
		= unseparated_uuid_p
		| separated_uuid_p
		;
	static constexpr auto bracketed_uuid_p
		= '{' >> unbracketed_uuid_p >> '}'
		;
	static constexpr auto any_uuid_p
		= unbracketed_uuid_p
		| bracketed_uuid_p
		;
	static constexpr auto uuid_p
		= any_uuid_p >> eoi
		;

	// compile-time string (like a std::string)
	static constexpr auto s = sprout::to_string(U"{550E8400-E29B-41D4-A716-446655440000}");

	// run parsing
	static constexpr auto parsed = parse(s.begin(), s.end(), uuid_p);

	static_assert(parsed.success(), "");			// parsing succeeded
	static_assert(parsed.current() == s.end(), "");	// full matched

	// get attribute
	static constexpr auto uuid = parsed.attr();

	// verification
	static_assert(uuid[0] == 0x55, "");
	static_assert(uuid[1] == 0x0E, "");
	static_assert(uuid[2] == 0x84, "");
	static_assert(uuid[3] == 0x00, "");
	static_assert(uuid[4] == 0xE2, "");
	static_assert(uuid[5] == 0x9B, "");
	static_assert(uuid[6] == 0x41, "");
	static_assert(uuid[7] == 0xD4, "");
	static_assert(uuid[8] == 0xA7, "");
	static_assert(uuid[9] == 0x16, "");
	static_assert(uuid[10] == 0x44, "");
	static_assert(uuid[11] == 0x66, "");
	static_assert(uuid[12] == 0x55, "");
	static_assert(uuid[13] == 0x44, "");
	static_assert(uuid[14] == 0x00, "");
	static_assert(uuid[15] == 0x00, "");
}