5.32 changed this macro into an inline function so that 'sv' only gets
evaluated once, but didn't update the documentation to reflect that.
unless the scalar is already C<SvPOK>, C<SvIOK> or C<SvNOK> (the public, not the
private flags).
-See C<L</SvTRUEx>> for a version which guarantees to evaluate C<sv> only once.
+As of Perl 5.32, this is guaranteed to evaluate C<sv> only once. Prior to that
+release, use C<L</SvTRUEx>> for single evaluation.
=for apidoc Am|bool|SvTRUE_nomg|SV* sv
Returns a boolean indicating whether Perl would evaluate the SV as true or