// Copyright © 2016 Abcum Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package sql

func (p *parser) parseReturnStatement() (stmt *ReturnStatement, err error) {

	stmt = &ReturnStatement{}

	for {

		tok, lit, err := p.shouldBe(NULL, NOW, DATE, TIME, TRUE, FALSE, STRING, NUMBER, DOUBLE, THING, JSON, ARRAY, PARAM)
		if err != nil {
			return nil, err
		}

		val, err := p.declare(tok, lit)
		if err != nil {
			return nil, err
		}

		stmt.What = append(stmt.What, val)

		// If the next token is not a comma then break the loop.
		if _, _, exi := p.mightBe(COMMA); !exi {
			break
		}

	}

	if _, _, err = p.shouldBe(EOF, SEMICOLON); err != nil {
		return nil, err
	}

	return

}