Make LazyObject type-checkable.

Library/.rubocop.yml

@@ -71,6 +71,10 @@ Layout/HeredocIndentation:
 Metrics/ParameterLists:
   CountKeywordArgs: false
 
+# Allow dashes in filenames.
+Naming/FileName:
+  Regex: !ruby/regexp /^[\w\@\-\+\.]+(\.rb)?$/
+
 # Implicitly allow EOS as we use it everywhere.
 Naming/HeredocDelimiterNaming:
   ForbiddenDelimiters:
@@ -80,10 +84,6 @@ Naming/MethodName:
   IgnoredPatterns:
     - '\A(fetch_)?HEAD\?\Z'
 
-# Allow dashes in filenames.
-Naming/FileName:
-  Regex: !ruby/regexp /^[\w\@\-\+\.]+(\.rb)?$/
-
 # Both styles are used depending on context,
 # e.g. `sha256` and `something_countable_1`.
 Naming/VariableNumber:

Library/Homebrew/.rubocop.yml

@@ -43,7 +43,10 @@ Metrics/ModuleLength:
 
 Naming/PredicateName:
   # Can't rename these.
-  AllowedMethods: is_32_bit?, is_64_bit?
+  AllowedMethods:
+    - is_a?
+    - is_32_bit?
+    - is_64_bit?
 
 Style/HashAsLastArrayItem:
   Exclude:

Library/Homebrew/lazy_object.rb

@@ -18,4 +18,9 @@ class LazyObject < Delegator
   def __setobj__(callable)
     @__callable__ = callable
   end
+
+  # Forward to the inner object to make lazy objects type-checkable.
+  def is_a?(klass)
+    __getobj__.is_a?(klass) || super
+  end
 end