Merge pull request #4244 from mame/pattern-module-name

Compare the Pattern DSL prefix with the module name

Author: kddnewton

lib/prism/pattern.rb

@@ -175,7 +175,7 @@ def compile_alternation_pattern_node(node) # :nodoc:
     def compile_constant_path_node(node) # :nodoc:
       parent = node.parent
 
-      if parent.is_a?(ConstantReadNode) && parent.slice == "Prism"
+      if (parent.is_a?(ConstantReadNode) || parent.is_a?(ConstantPathNode)) && parent.slice == Prism.name
         name = node.name
         raise CompilationError, node.inspect if name.nil?