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[TCS] Context and leaveContext [message #618]

Tue, 19 February 2008 09:08

T Kruse

Messages: 73
Registered: July 2009

Member

Hi,

I noticed in generated ANTLR3 grammars, that certain elements look like
this:
name ...
: ...
{
ei.leaveContext(false);
}
;

now the leaveContextmethod looks like this:

public void leaveContext(boolean leave) {
if(leave) currentContext = currentContext.parent();
}

So I cannot see the point of calling leaveContext with false. So I wonder,
what is the reason for this (Or is it something historical)?

regards,
Thibault

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Re: [TCS] Context and leaveContext [message #642 is a reply to message #618]

Tue, 19 February 2008 17:34

Frédéric Jouault

Messages: 572
Registered: July 2009

Senior Member

Hello,

> I noticed in generated ANTLR3 grammars, that certain elements look like
> this:
> name ...
> : ...
> { ei.leaveContext(false);
> }
> ;
>
> now the leaveContextmethod looks like this:
>
> public void leaveContext(boolean leave) {
> if(leave) currentContext = currentContext.parent();
> }
>
> So I cannot see the point of calling leaveContext with false. So I
> wonder, what is the reason for this (Or is it something historical)?

It is something historical ;-).

Regards,

Frédéric Jouault

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