It's special to $^H and %^H, but %^H was created to give you access to that behaviour 
$^H{'mypragma'} = ...;

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$^H{'mypragma::G'} = ...;

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In reply to Re^3: Import pragmas like strict and warnings into callers lexical scope by ikegami
in thread Import pragmas like strict and warnings into callers lexical scope by youwin

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