local+global
single-char-var
unknown-warning
+ broken-var-ref
);
our %warn_ena = @warn_ena_dfl;
sub wrn ($$) {
my ($wk,$m) = @_;
+ our %warn_dedupe;
+ return 0 if $warn_dedupe{$err_file,$.,$wk,$m}++;
wrncore($wk, "${err_file}:$.: $m");
}
wrn 'single-char-var',
'possibly confusing unbracketed single-char $-expansion';
}
+ elsif (m{^$esc}) {
+ wrn 'broken-var-ref',
+ 'broken $&... expansion; you probably meant &$';
+ }
elsif (m{^\(($esc)?([^()\$]+)\)} ||
m{^\{($esc)?([^{}\$]+)\}}) {
$note_varref->($2,!!$1);