how to define what characters are considered to be part of a tagname in vim?

Question

when I'm using Ctrl-] to jump to a tagname in vim it ignores ! and ? characters which can be used in ruby as parts of identifiers. i.e. when trying to jump to 'empty?' tag it complains about missing tag 'empty'.

Answer 1

Add the desired characters to the iskeyword option. Try:

:set iskeyword+=!,?