Greetings!
On Sun, 2010-08-29 at 07:40 -0700, Ted Hoise wrote:
> VERY simple example
>
> rule : 'H' ;
>
> When I test this very simple rule, it works (in Antlrworks and Eclipse) of
> course for input 'H', but it also works for input 'fH', resulting in a token
> 'fH'. I do I suppress this behavior: it seems like an error should occur.
>
Unable to reproduce.
When I run your examples from the command line I do indeed get an error
on the second example.
Maybe there is something unexpected/unusual about your test rig? (i have
attached the grammar i used in my test so you can compare it to yours)
Hope this helps
-jbb
grammar Test;
options {
output = AST;
ASTLabelType = CommonTree;
}
@members {
private static final String [] x = new String[] {
"H", "fH"
};
public static void main(String [] args) {
for( int i = 0; i < x.length; ++i ) {
try {
System.out.println("about to parse:`"+x[i]+"`");
TestLexer lexer = new TestLexer(new ANTLRStringStream(x[i]));
CommonTokenStream tokens = new CommonTokenStream(lexer);
TestParser parser = new TestParser(tokens);
TestParser.rule_return p_result = parser.rule();
CommonTree ast = p_result.tree;
if( ast == null ) {
System.out.println("resultant tree: is NULL");
} else {
System.out.println("resultant tree: " + ast.toStringTree());
}
System.out.println();
} catch(Exception e) {
e.printStackTrace();
}
}
}
}
rule : 'H' ;
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