Issue #8377 has been updated by phluid61 (Matthew Kerwin). =begin henry.maddocks (Henry Maddocks) wrote: > charliesome (Charlie Somerville) wrote: > > (({::})) is usually a constant lookup operator, but it can also be > > used to call methods. > > Is it? I thought it was the scope resolution operator. While I know better, my gut instinct is always to agree; and that, by contrast, (({.})) is for the receiver of a method. For example: ?? ::Kernel::Array(3) #=> in global namespace, # in nested namespace 'Kernel', # invoke method 'Array' with no receiver # perlish: @::Kernel::Array(3) ::Kernel.Array(3) #=> in global namespace, # in nested namespace 'Kernel', # invoke method 'Array' with 'Kernel' as receiver # perlish: @::Kernel->Array(3), or @::Kernel::Array(::Kernel,3) However I know that's not the case; and in fact (({::})) means different things if the right-hand parameter thingy is a constant or function. I.e. (({obj.foo})) ~ (({obj::foo()})) ~ (({obj::foo})), but (({obj.FOO})) ~ (({obj::FOO()})) ??? (({obj::FOO})), irrespective of ((|obj|)) being a Class or not. The whole thing would be made much more clear if (({::FOO()})) and (({::foo})) were removed, and (({::})) was always only used to resolve constants. > charliesome (Charlie Somerville) wrote: > > This can confusing to people learning Ruby. > > It depends what language you're coming from. Unless you're coming from Ruby, I'm pretty sure it's confusing for everyone. =end ---------------------------------------- Feature #8377: Deprecate :: for method calls in 2.1 https://bugs.ruby-lang.org/issues/8377#change-39188 Author: charliesome (Charlie Somerville) Status: Open Priority: Normal Assignee: Category: Target version: current: 2.1.0 =begin (({::})) is usually a constant lookup operator, but it can also be used to call methods. This can confusing to people learning Ruby. I propose deprecating (({::})) as a method call operator in Ruby 2.1, then removing it in 2.2 (or whichever version comes after 2.1). As part of the deprecation, Ruby's parser should emit a warning whenever (({::})) is used as a method call operator. This warning should be emitted even if (({-w})) is not enabled. =end -- http://bugs.ruby-lang.org/