Readonly::Foo and use constant support for ctags

.ctags

--regex-perl=/Readonly::[a-zA-Z0-9_]+ my [\$@%]([a-zA-Z0-9_]+)/\1/C,Readonly:: constant/
--regex-perl=/use constant ([A-Z][a-zA-Z0-9_]+)/\1/c,use constant/
--regex-perl=/has[[:space:]]+([[:alnum:]_]+)[[:space:]]*=>/\1/M,moose attribute/e