Re: Why does NOT operator on match operator on string concatenation require two pairs of parens?

Appears to be the "If it looks like a function, it IS a function" rule.

$ perl -MO=Deparse -e'if (not +($label.$inst) =~ /\blea\b/i) {}'
unless (($label . $inst) =~ /\blea\b/i) {
    ();
}
-e syntax OK
[download]

$ perl -MO=Deparse -e'if (not "$label$inst" =~ /\blea\b/i) {}'
unless ("$label$inst" =~ /\blea\b/i) {
    ();
}
-e syntax OK
[download]

Alternative

$ perl -MO=Deparse -e'if ("$label$inst" !~ /\blea\b/i) {}'
unless ("$label$inst" =~ /\blea\b/i) {
    ();
}
-e syntax OK
[download]

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