re2c cannot accept {0,}

[skvadrik]

It actually crashes if this form is ever used.

I attached a patch and a test case for this bug.

With this branch working it might be possible to
express one of the “factor” alternatives in “parser.y” as:

| primary close
{
switch($2){
case ‘*’:
$$ = new CloseVOp($1, 0, -1);
break;
case ‘+’:
$$ = new CloseVOp($1, 1, -1);
break;
case ‘?’:
$$ = new CloseVOp($1, 0, 1);
break;
}
}

IMHO, but might be easier to read.

Original comment by: alder

[skvadrik]

bug patch and test case

Original comment by: alder

[skvadrik]

- assigned_to: nobody —> helly

Original comment by: helly

[skvadrik]

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Fix in the scanner.

Original comment by: helly

[skvadrik]

- status: open —> closed-fixed

Original comment by: helly

[skvadrik]

Logged In: YES
user_id=492233

Well, “{0,}” obviously is “*”, but making an explicit
substitude in the scanner (a workaround really) still leaves
a “hole” in CloseVOp::compile. IMHO, it might look nicer if
you do fix that method instead. The fix in my patch, I
think, actually makes that method work correctly for all
acceptable parameters.

Original comment by: alder