Re: Matching start and end

[Hans Aberg]

On 27 Jul 2009, at 17:59, Alex Duller wrote:

> I'm trying to parse the following bit of code and want to check that  
> the yIDENTIFIER words are the same (in the following case  
> yIDENTIFIER is TestFir). The regular expression for an yIDENTIFIER  
> is [a-zA-Z_][a-zA-Z0-9_$]*
>
> entity TestFir is
> end entity TestFir;
>
> The rule for parsing the above is:
> yENTITY yIDENTIFIER yIS
> ...
> yEND yENTITY yIDENTIFIER ';'

Put begin and end in the same rule, and check it in the actions:
  named_environment:
    begin name ... end name ... { // Check $2 = $k, where $k is the  
second name }

  Hans