"Hi everybody!"
- Dr. Nick.
I have a larger grammar, a tiny portion of which is attached below.
Everything works as expected, except for one thing. In the tree
grammar, note the following rule:
decl: ID typeSpec { System.out.println( "decl id=" + $ID + ";type=" +
$typeSpec.text );}
Given the following input:
Dim foo as String
Dim bar as Int
I expect it to print:
decl id=foo;type=String
decl id=bar;type=Int
But instead I get:
decl id=foo;type=as String
decl id=bar;type=as Int
The string trees all look as expected, like "(Dim foo String) (Dim bar
Int)", but I get the extra "as" in the type node, even though I
exclude the "AS" node when building the tree in the following rule:
asType: AS! type;
I get the same results when the parser is generated by ANTLR 3.3 and
3.4. What am I doing wrong?
Here are the grammars:
grammar test;
options{ output=AST; }
start : varDef+ EOF;
varDef : DIM^ ID asType;
asType : AS! type;
type : STRING_T | INT_T;
AS : ('A'|'a')('S'|'s');
DIM : ('D'|'d')('I'|'i')('M'|'m');
STRING_T: ('S'|'s')('T'|'t')('R'|'r')('I'|'i')('N'|'n')('G'|'g');
INT_T : ('I'|'i')('N'|'n')('T'|'t');
ID : ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'0'..'9'|'_')*;
WS : ( ' '
| '\t'
| '\r'
| '\n'
) {$channel=HIDDEN;}
;
tree grammar testTree;
options
{
tokenVocab=test;
ASTLabelType=CommonTree;
output=AST;
}
start : statement+
;
statement
: ^(DIM decl)
;
decl : ID typeSpec { System.out.println( "decl id=" + $ID + ";type=" +
$typeSpec.text );}
;
typeSpec: STRING_T | INT_T
;
List: http://www.antlr.org/mailman/listinfo/antlr-interest
Unsubscribe:
http://www.antlr.org/mailman/options/antlr-interest/your-email-address
--
You received this message because you are subscribed to the Google Groups
"il-antlr-interest" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/il-antlr-interest?hl=en.
