refactor: unify core actions and Ex command aliases

src/ruby_values.rb

@@ -58,16 +58,30 @@ module Vamp
   # @type [Module<Vamp::Core>]
   Core = Module.new
 
-  # @param names [Array<String>] dotted core action names
+  # @param entries [Array<Hash{String => String, nil}>] action name and optional Ex alias descriptors
   # @return [Array<Module>] frozen action namespaces
-  def self.install_actions(names)
-    raise TypeError, "core action catalog must be an Array" unless names.is_a?(Array)
+  def self.install_actions(entries)
+    raise TypeError, "core action catalog must be an Array" unless entries.is_a?(Array)
 
     namespaces = [Core]
-    names.each { |name| install_action(name, namespaces) }
+    aliases = {}
+    entries.each do |entry|
+      raise TypeError, "core action descriptor must be a Hash" unless entry.is_a?(Hash)
+
+      install_action(entry.fetch("name"), namespaces)
+      ex = entry.fetch("ex")
+      aliases[string!(ex, "core Ex alias").freeze] = true unless ex.nil?
+    end
+    @builtin_commands = aliases.freeze
     namespaces.each(&:freeze)
   end
 
+  # @param name [String] binding command name
+  # @return [Boolean] whether the catalog owns this textual Ex alias
+  def self.builtin_command?(name)
+    @builtin_commands.key?(name)
+  end
+
   # Frozen binding mode values, distinct from a buffer's editing state.
   module Modes
     # @!method self.normal