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|
// This file is part of PyANTLR. See LICENSE.txt for license
// details..........Copyright (C) Wolfgang Haefelinger, 2004.
//
// $Id$
options {
language=Python;
}
class rewrite_l extends Lexer;
protected
START
options {
ignore=WS;
}
: id:ID ":="! '('! expr:EXPR ')'!
{
// can access text matched for any rule
print "found "+ id.getText() + "," + expr.getText()
// text will be ID+EXPR minus whitespace
}
;
protected
ID : ( let:LETTER { print "letter " + let.getText() } )+
;
protected
LETTER
: 'a'..'z'
{
s = $getText;
$setText(s.upper())
}
;
protected
EXPR: i:INT! // don't include, but i.getText() has access
{$setText(i.getText())} // effect is if no "!" and no "i:"
| ID
;
protected
INT : ('0'..'9')+
;
// what if ! on rule itself and invoker had !...should
// rule return anything in the token to the invoker? NO!
// make sure 'if' is in the right spot
// What about no ! on caller but ! on called rule?
protected
WS! : ( ' ' // whitespace not saved
| '\t'
| '\n' {$newline}
)+
{$skip} // way to set token type
;
|
