1/*
2 * [The "BSD licence"]
3 * Copyright (c) 2005-2008 Terence Parr
4 * All rights reserved.
5 *
6 * Conversion to C#:
7 * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33grammar FastSimpleExpression;
34
35options
36{
37	language=CSharp3;
38	//slim=true;
39	output=AST;
40	ASTLabelType=CommonTree;
41}
42
43@lexer::superClass{Antlr.Runtime.SlimLexer}
44@lexer::namespace{Antlr3.Runtime.Test}
45@parser::namespace{Antlr3.Runtime.Test}
46
47public
48expression
49	:	additive_expression
50		EOF
51	;
52
53additive_expression
54	:	multiplicative_expression
55		(	('+'^ | '-'^)
56			multiplicative_expression
57		)*
58	;
59
60multiplicative_expression
61	:	atom
62		(	('*'^ | '/'^ | '%'^)
63			atom
64		)*
65	;
66
67atom
68	:	IDENTIFIER
69	|	NUMBER
70	;
71
72//
73// LEXER
74//
75
76IDENTIFIER
77	:	('a'..'z' | 'A'..'Z' | '_')
78		('a'..'z' | 'A'..'Z' | '_' | '0'..'9')*
79	;
80
81NUMBER
82	:	'0'..'9'+
83	;
84
85WS
86	:	(' ' | '\t' | '\n' | '\r' | '\f')
87		{$channel = Hidden;}
88	;
89