Maybe support larger integer types for yylineno

[krcurtis]

It would be helpful to be able to specify different integer types for yylineno. I thought I'd try an Ada-based solution and was trying to use aflex and ayacc to verify a 270GB FASTA file (it is supposed to have a very regular structure). Unfortunately I got an exception:

raised CONSTRAINT_ERROR : scanfasta_lexer.adb:221 overflow check failed

For now, I'm manually forcing yylineno and yy_last_yylineno to be a custom type in the _dfa.ads file. It would be nice to be able to specify that in a different file that would not be overwritten during the build process.

Thanks!

[stcarrez]

Fixed in 1.7 version.
You can declare in the lexer file something like:

%option yylinenotype=Line_Number
%yydfa {
   subtype Line_Number is Long_Long_Integer;
}

The %yydfa code block is injected in the _dfa.ads package declaration before the declaration of the yylineno variables.