ClickHouse/dbms/include/DB/Parsers/ParserEnumElement.h

#pragma once

#include <DB/Parsers/ASTEnumElement.h>
#include <DB/Parsers/ExpressionElementParsers.h>


namespace DB
{


class ParserEnumElement : public IParserBase
{
	ParserStringLiteral name_parser;
	ParserUnsignedInteger value_parser;

protected:
	const char * getName() const override { return "enum element"; }
	bool parseImpl(Pos & pos, Pos end, ASTPtr & node, Pos & max_parsed_pos, Expected & expected) override
	{
		ParserString equality_sign_parser("=");
		ParserWhiteSpace ws;
		const auto begin = pos;

		ASTPtr name;
		if (!name_parser.parse(pos, end, name, max_parsed_pos, expected))
			return false;

		ws.ignore(pos, end, max_parsed_pos, expected);

		if (!equality_sign_parser.ignore(pos, end, max_parsed_pos, expected))
			return false;

		ws.ignore(pos, end, max_parsed_pos, expected);

		ASTPtr value;
		if (!value_parser.parse(pos, end, value, max_parsed_pos, expected))
			return false;

		node = new ASTEnumElement{
			{ begin, pos },
			static_cast<const ASTLiteral &>(*name).value.get<String>(),
			static_cast<const ASTLiteral &>(*value).value.get<UInt64>()
		};

		return true;
	}
};


}