/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
grammar AntlrExample;

@header {
package com.example;
}

file
    : row+ EOF
    ;

row
    : IDENTIFIER '=' value?
    ;

value
    : BOOL
    | STRING
    ;

WS
    : [ \t]+
    ;

NL
    : NewLine
    ;

IDENTIFIER
    : Letter LetterDigit*
    ;

BOOL
    : 'true'
    | 'false'
    ;

COMMENT
    : '/*' .*? '*/' -> skip
    ;

LINE_COMMENT
    : ('#' | '//') ~[\r\n]*? -> skip
    ;

fragment Letter
    : [a-zA-Z\-_]
    ;

fragment NewLine
    : '\r'? '\n'
    ;