Typecheck _Visitor as Visitor

Author: kddnewton

.gitattributes

@@ -7,6 +7,8 @@ test/prism/fixtures/seattlerb/**/*.txt linguist-vendored
 test/prism/fixtures/unparser/**/*.txt linguist-vendored
 test/prism/fixtures/whitequark/**/*.txt linguist-vendored
 test/prism/snapshots/**/*.txt linguist-generated
+
+rbi/generated/**/*.rbi linguist-generated
 sig/generated/**/*.rbs linguist-generated
 
 # All .rb files should have LF line ending, even on Windows, regardless of the git config core.autocrlf value.

rakelib/typecheck.rake

@@ -249,8 +249,10 @@ namespace :typecheck do
         end
       when RBS::Types::Interface
         case type.name.name
-        when :_CodeUnitsCache, :_CommentTarget, :_Field, :_Repository, :_Stream, :_Value, :_Visitor
+        when :_CodeUnitsCache, :_CommentTarget, :_Field, :_Repository, :_Stream, :_Value
           RBI::Type.untyped
+        when :_Visitor
+          RBI::Type.simple("Visitor")
         else
           raise
         end
@@ -331,6 +333,7 @@ namespace :typecheck do
         - ./lib/prism/node_ext.rb
         - ./lib/prism/parse_result.rb
         - ./lib/prism/pattern.rb
+        - ./lib/prism/visitor.rb
         - ./lib/prism/translation/parser/lexer.rb
         - ./lib/prism/translation/ripper.rb
         - ./lib/prism/translation/ripper/sexp.rb