impl: What's the implementation of a Ruby method?

$ impl ~/git/ruby193 'Strimg#sum'
String#sum	string.c	/^rb_str_sum(int argc, VALUE *argv, VALUE str)$/;"	f	file:

This may take long time in the first time you called, but it won't take time in the next time.

$ cd ~/git/ruby193
$ ctags -R
$ impl --create . >> tags

After moving into the latest Ruby source code directory of you, the first command builds tags by the Ruby C source codes, using your own ctags command. Then impl extracts Ruby methods both from the source codes and the tags file. The command outputs additional tags to STDOUT, so you may want to redirect to tags for appending them.

Now you can go into the definition of a Ruby method by Ruby method format like Random#rand!

Higher level handy command is also available. The following command does almost equivalent to the three command previously I showed.

$ impl --suite ~/git/ruby193

$ gem install impl

Tatsuhiro Ujihisa

tags is an all left handed word. impl is an all right handed word. If you are a dvorak user, you can type them easily.