convert_swig's regex for matching qualified template instantiations is incomplete

[dbankieris]

This line is looking for template instantiations that are qualified with the scope resolution operator (::). The pattern matches instantiations with only a single operator (such as bar::Foo) but not those with multiple operators (such as baz::bar::Foo). I believe the correct pattern is ^\w*(::\w+)+<

[sharmeye]

Is there a scenario you're encountering that makes this change necessary? Because we don't support nested namespaces (or classes) so there's not really a situation (we don't think) where this would come into play. Please provide examples if you are having a problem with how it is currently implemented that this change fixes.

[dbankieris]

TrickCAT uses lots of nested namespaces, which didn't cause any problems until f8a079e. #1753 restores enough support for nested namespaces to allow TrickCAT to build within Trick again. Consider it a small step on the path from "we don't support nested namespaces at all" to "we partially support nested namespaces."