Fix enum values that match keywords

Rakefile

@@ -30,10 +30,7 @@ Rake::TestTask.new do |t|
 
   # After 2.7, there were not warnings for uninitialized ivars anymore
   if RUBY_VERSION < "3"
-    puts "Disabling warnings on Ruby #{RUBY_VERSION.inspect}"
     t.warning = false
-  else
-    puts "Enabling warnings on Ruby #{RUBY_VERSION.inspect}"
   end
 end
 

lib/graphql/language/parser.rb

@@ -379,7 +379,12 @@ def parse_enum_value_definitions
             v_loc = pos
             description = if at?(:STRING); string_value; end
             defn_loc = pos
-            enum_value = parse_enum_name
+            # Any identifier, but not true, false, or null
+            enum_value = if at?(:TRUE) || at?(:FALSE) || at?(:NULL)
+              expect_token(:IDENTIFIER)
+            else
+              parse_name
+            end
             v_directives = parse_directives
             list << EnumValueDefinition.new(pos: v_loc, definition_pos: defn_loc, description: description, name: enum_value, directives: v_directives, filename: @filename, source: self)
           end
@@ -631,15 +636,6 @@ def parse_name_without_on
         end
       end
 
-      # Any identifier, but not true, false, or null
-      def parse_enum_name
-        if at?(:TRUE) || at?(:FALSE) || at?(:NULL)
-          expect_token(:IDENTIFIER)
-        else
-          parse_name
-        end
-      end
-
       def parse_type_name
         TypeName.new(pos: pos, name: parse_name, filename: @filename, source: self)
       end
@@ -730,6 +726,54 @@ def value
           loc = pos
           advance_token
           VariableIdentifier.new(pos: loc, name: parse_name, filename: @filename, source: self)
+        when :SCHEMA
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "schema", filename: @filename, source: self)
+        when :SCALAR
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "scalar", filename: @filename, source: self)
+        when :IMPLEMENTS
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "implements", filename: @filename, source: self)
+        when :INTERFACE
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "interface", filename: @filename, source: self)
+        when :UNION
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "union", filename: @filename, source: self)
+        when :ENUM
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "enum", filename: @filename, source: self)
+        when :INPUT
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "input", filename: @filename, source: self)
+        when :DIRECTIVE
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "directive", filename: @filename, source: self)
+        when :TYPE
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "type", filename: @filename, source: self)
+        when :QUERY
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "query", filename: @filename, source: self)
+        when :MUTATION
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "mutation", filename: @filename, source: self)
+        when :SUBSCRIPTION
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "subscription", filename: @filename, source: self)
+        when :FRAGMENT
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "fragment", filename: @filename, source: self)
+        when :REPEATABLE
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "repeatable", filename: @filename, source: self)
+        when :ON
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "on", filename: @filename, source: self)
+        when :EXTEND
+          advance_token
+          Nodes::Enum.new(pos: pos, name: "extend", filename: @filename, source: self)
         else
           expect_token(:VALUE)
         end

spec/graphql/dataloader/source_spec.rb

@@ -23,7 +23,14 @@ def fetch(keys)
     dl.with(FailsToLoadSource).request(nil)
 
     source_cache = dl.instance_variable_get(:@source_cache)
-    assert source_cache[FailsToLoadSource][[{}]].pending?
+    source_cache_for_source = source_cache[FailsToLoadSource]
+
+    # The value of this changed in Ruby 3.3.3, see https://bugs.ruby-lang.org/issues/20180
+    # In previous versions, it was `[{}]`, but now it's `[]`
+    empty_batch_key = [*[], **{}]
+    source_inst = source_cache_for_source[empty_batch_key]
+    assert_instance_of FailsToLoadSource, source_inst, "The cache includes a pending source (#{source_cache_for_source.inspect})"
+    assert source_inst.pending?
   end
 
   class CustomKeySource < GraphQL::Dataloader::Source

spec/graphql/language/parser_spec.rb

@@ -96,12 +96,18 @@
     assert GraphQL.parse("{ field(null: false) ... null } fragment null on Query { null }")
   end
 
-  it "allows fields and arguments named on and directive" do
-    assert GraphQL.parse("{ on(on: false) directive(directive: false)}")
+  it "allows fields, arguments, and enum values named on and directive" do
+    assert GraphQL.parse("{ on(on: on) directive(directive: directive)}")
   end
 
-  it "allows fields and arguments extend" do
-    assert GraphQL.parse("{ extend(extend: false) }")
+  it "allows fields, arguments, and enum values named extend" do
+    assert GraphQL.parse("{ extend(extend: extend) }")
+  end
+
+  it "allows fields, arguments, and enum values named type" do
+    doc = GraphQL.parse("{ type(type: type) }")
+    assert_instance_of GraphQL::Language::Nodes::Enum, doc.definitions.first.selections.first.arguments.first.value
+
   end
 
   it "raises an error when unicode is used as names" do