unparenthesised macro expansions

I see that one of the definitions each of Perl_isfinite(), Perl_isinf(),
and Perl_isfinitel() in perl.h, and the definition of SvPADMY() in sv.h,
have a potential precedence problem.  Their expansions take the form
"!(...)", and so are vulnerable to being broken up by postfix operators.
Each of these expansions should have a pair of enclosing parens added.

-zefram

• unparenthesised macro expansions by Zefram via perl5-porters
• Re: unparenthesised macro expansions by demerphq