blob: 51f40169011918369bf2fb0a855a344f444c4152 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
grammar ExprGrammar;
options {
language = Java;
}
COMPAREOP : '==' | '!=' | '>' | '<' | '>=' | '<=';
RELOP : 'and' | 'or';
ADDOP : '+' | '-';
MULTOP : '/' | '*';
NUMBER : ('0'..'9')+;
STRING : '\'' ~[\']* '\'';
IDENTIFIER : ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'0'..'9'|'_'|'-')*;
// CONTEXT_VAR : '$' IDENTIFIER;
WS: [ \n\t\r]+ -> skip;
constant : NUMBER | STRING ;
variableLead : ('$')? variableTerm ;
variableTerm : IDENTIFIER ('[' expr ']')? ;
variable : variableLead ('.' variableTerm)* ('.')?;
// variable : CONTEXT_VAR ( '[' expr ']' )? ('.' IDENTIFIER )? ;
atom : constant | variable;
expr : atom
| parenExpr
| multExpr
| addExpr
| compareExpr
| relExpr
| funcExpr;
parenExpr : '(' expr ')';
term : atom | parenExpr | funcExpr;
multExpr : term (MULTOP term)*;
addExpr : multExpr (ADDOP multExpr)*;
compareExpr : addExpr COMPAREOP addExpr;
relExpr : compareExpr (RELOP expr)*;
funcExpr : IDENTIFIER '(' expr (',' expr)* ')';
|
