Method parse_relational_expression

src/pugiXML/pugixml.cpp:9470–9487

RelationalExpr ::= AdditiveExpr | RelationalExpr '<' AdditiveExpr | RelationalExpr '>' AdditiveExpr | RelationalExpr '<=' AdditiveExpr | RelationalExpr '>=' AdditiveExpr

		//					  | RelationalExpr '<=' AdditiveExpr
		//					  | RelationalExpr '>=' AdditiveExpr
		xpath_ast_node* parse_relational_expression()
		{
			xpath_ast_node* n = parse_additive_expression();

			while (_lexer.current() == lex_less || _lexer.current() == lex_less_or_equal || 
				   _lexer.current() == lex_greater || _lexer.current() == lex_greater_or_equal)
			{
				lexeme_t l = _lexer.current();
				_lexer.next();

				xpath_ast_node* expr = parse_additive_expression();

				n = new (alloc_node()) xpath_ast_node(l == lex_less ? ast_op_less : l == lex_greater ? ast_op_greater :
								l == lex_less_or_equal ? ast_op_less_or_equal : ast_op_greater_or_equal, xpath_type_boolean, n, expr);
			}

			return n;
		}
		
		// EqualityExpr ::= RelationalExpr
		//					| EqualityExpr '=' RelationalExpr