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/*
* Copyright © 2002 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* California 95054, U.S.A. All rights reserved. Sun Microsystems, Inc. has
* intellectual property rights relating to technology embodied in the product
* that is described in this document. In particular, and without limitation,
* these intellectual property rights may include one or more of the U.S.
* patents listed at http://www.sun.com/patents and one or more additional
* patents or pending patent applications in the U.S. and in other countries.
* U.S. Government Rights - Commercial software. Government users are subject
* to the Sun Microsystems, Inc. standard license agreement and applicable
* provisions of the FAR and its supplements. Use is subject to license terms.
* Sun, Sun Microsystems, the Sun logo and Java are trademarks or registered
* trademarks of Sun Microsystems, Inc. in the U.S. and other countries. This
* product is covered and controlled by U.S. Export Control laws and may be
* subject to the export or import laws in other countries. Nuclear, missile,
* chemical biological weapons or nuclear maritime end uses or end users,
* whether direct or indirect, are strictly prohibited. Export or reexport
* to countries subject to U.S. embargo or to entities identified on U.S.
* export exclusion lists, including, but not limited to, the denied persons
* and specially designated nationals lists is strictly prohibited.
*/
PARSER_BEGIN(Simple3)
public class Simple3 {
public static void main(String args[]) throws ParseException {
Simple3 parser = new Simple3(System.in);
parser.Input();
}
}
PARSER_END(Simple3)
SKIP :
{
" "
| "\t"
| "\n"
| "\r"
}
TOKEN :
{
<LBRACE: "{">
| <RBRACE: "}">
}
void Input() :
{ int count; }
{
count=MatchedBraces() <EOF>
{ System.out.println("The levels of nesting is " + count); }
}
int MatchedBraces() :
{ int nested_count=0; }
{
<LBRACE> [ nested_count=MatchedBraces() ] <RBRACE>
{ return ++nested_count; }
}
|
