#30 Recognise Ruby Foo::Bar style class names

[Ciaran McCreesh]

Ruby classes can be declared like 'class Foo::Bar'.
Currently this gives a class name of 'Foo'. This patch
allows colons to be included in class and module names.

[Ciaran McCreesh]

ctags-5.5.4-ruby-classes.patch

[Elliott Hughes]

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i think the submitter is only half correct. this example:

#!/usr/bin/ruby -w
class Foo::Bar
def initialize()
$stderr.puts("Foo:Bar")
end
end
Foo::Bar.new()

gives this error:

$ ./x.rb
./x.rb:2: uninitialized constant Foo (NameError)

and using a single ":" gives this error:

$ ./x.rb
./x.rb:2: syntax error, unexpected ':', expecting '<' or '\n' or ';'
class Foo:Bar
^

you can use :: as a C++-like scope resolution operator, including in definitions:

#!/usr/bin/ruby -w
module Foo
end
class Foo::Bar
def initialize()
$stderr.puts("Foo:Bar")
end
end
Foo::Bar.new()

but the tag there isn't Foo::Bar, it's Bar in the scope of Foo. accepting ":" as part of an identifier would be wrong. we need to be more intelligent when parsing definitions and correctly enter/exit the enforced scope instead.