hello, i've been hacking away at this but can't get the correct regex expression and would like a little help.

old C-style macros in headers files are #ifdef __some_Long_name__ which start and end with double underlines and look like perl literals

in C++14, i'd like to batch convert these macros to standard which strips the double underscores and convert strings to upper case like this

SOME_LONG_NAME

i like one-liners, so i've tried these and many variations to escaping the underscores 

perl -pi -e 's/__*__/\uc($1)/g' a.test;
perl -pi -e 's/__*__/\U$1/g' a.test

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thanks

In reply to another string replacement with uppercase :: converting C macros to C++ by f77coder

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