Typically, you would provide a LIST to grep, instead of a single scalar.

Conversely, if one only has one string to match, one wouldn't use grep. 

my @matches = $string =~ /(?:class|struct)\s+[^:{;]+:[\w<>\s]+{/g;

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In reply to Re^2: Finding C++ single inheritance occurrances by ikegami
in thread Finding C++ single inheritance occurrances by gibsonca

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