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[TCS] unused binary operators [message #7397]

Tue, 25 March 2008 12:23

T Kruse

Messages: 73
Registered: July 2009

Member

Hi,

Assuming I have defined several operators in my TCS file, among these:
operators {
priority 0 { -- highest priority
opSlash = slash, 2;
}
...

And assumin my operatorTemplate does use other operators but not the given
one above, "opSlash", my generated grammar will look like this:

priority_0 returns[Object ret2] @init {java.lang.String opName=null;
org.antlr.runtime.Token firstToken=input.LT(1);}
: (ret=primary_expression ((SLASH {opName = "/";} ()))*)
{
ret2=ret;
}

This means any number of trailing slashes would be allowed, even though I
would think the intention of not using this operator in the
operatorTemplate would indicate this not to be wished.

Is this a bug, or would the TCS be invalid in this case (Meaning in the
future there might be an error:"Unused operator in OperatorList")?

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Re: [TCS] unused binary operators [message #7410 is a reply to message #7397]

Tue, 25 March 2008 22:33

Frédéric Jouault

Messages: 572
Registered: July 2009

Senior Member

Hello,

> Is this a bug, or would the TCS be invalid in this case (Meaning in the
> future there might be an error:"Unused operator in OperatorList")?

There will be an error marker: "Unused operator: <operator-name>" on the
operator.

Thanks for reporting this.

Regards,

Frédéric Jouault

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