+ ruby{33,34}.y: allow blocks inherit anonymous args. (#1010)

This commit tracks upstream commit ruby/ruby@596db9c.

Author: iliabylich

lib/parser/ruby33.y

@@ -1101,7 +1101,7 @@ rule
                       end
 
                       if @context.in_dynamic_block? && context.in_def &&
-                        @static_env.declared_anonymous_blockarg? && @static_env.parent_has_anonymous_blockarg?
+                        @static_env.declared_anonymous_blockarg_in_current_scpe? && @static_env.parent_has_anonymous_blockarg?
                         diagnostic :error, :ambiguous_anonymous_blockarg, nil, val[0]
                       end
 
@@ -1142,7 +1142,7 @@ rule
                       end
 
                       if @context.in_dynamic_block? && context.in_def &&
-                        @static_env.declared_anonymous_restarg? && @static_env.parent_has_anonymous_restarg?
+                        @static_env.declared_anonymous_restarg_in_current_scope? && @static_env.parent_has_anonymous_restarg?
                         diagnostic :error, :ambiguous_anonymous_restarg, nil, val[0]
                       end
 
@@ -3059,7 +3059,7 @@ f_opt_paren_args: f_paren_args
                       end
 
                       if @context.in_dynamic_block? && context.in_def &&
-                        @static_env.declared_anonymous_kwrestarg? && @static_env.parent_has_anonymous_kwrestarg?
+                        @static_env.declared_anonymous_kwrestarg_in_current_scope? && @static_env.parent_has_anonymous_kwrestarg?
                         diagnostic :error, :ambiguous_anonymous_kwrestarg, nil, val[0]
                       end
 

lib/parser/ruby34.y

@@ -1101,7 +1101,7 @@ rule
                       end
 
                       if @context.in_dynamic_block? && context.in_def &&
-                        @static_env.declared_anonymous_blockarg? && @static_env.parent_has_anonymous_blockarg?
+                        @static_env.declared_anonymous_blockarg_in_current_scpe? && @static_env.parent_has_anonymous_blockarg?
                         diagnostic :error, :ambiguous_anonymous_blockarg, nil, val[0]
                       end
 
@@ -1142,7 +1142,7 @@ rule
                       end
 
                       if @context.in_dynamic_block? && context.in_def &&
-                        @static_env.declared_anonymous_restarg? && @static_env.parent_has_anonymous_restarg?
+                        @static_env.declared_anonymous_restarg_in_current_scope? && @static_env.parent_has_anonymous_restarg?
                         diagnostic :error, :ambiguous_anonymous_restarg, nil, val[0]
                       end
 
@@ -3059,7 +3059,7 @@ f_opt_paren_args: f_paren_args
                       end
 
                       if @context.in_dynamic_block? && context.in_def &&
-                        @static_env.declared_anonymous_kwrestarg? && @static_env.parent_has_anonymous_kwrestarg?
+                        @static_env.declared_anonymous_kwrestarg_in_current_scope? && @static_env.parent_has_anonymous_kwrestarg?
                         diagnostic :error, :ambiguous_anonymous_kwrestarg, nil, val[0]
                       end
 

lib/parser/static_environment.rb

@@ -4,9 +4,15 @@ module Parser
 
   class StaticEnvironment
     FORWARD_ARGS = :FORWARD_ARGS
-    ANONYMOUS_BLOCKARG = :ANONYMOUS_BLOCKARG
-    ANONYMOUS_RESTARG = :ANONYMOUS_RESTARG
-    ANONYMOUS_KWRESTARG = :ANONYMOUS_KWRESTARG
+
+    ANONYMOUS_RESTARG_IN_CURRENT_SCOPE = :ANONYMOUS_RESTARG_IN_CURRENT_SCOPE
+    ANONYMOUS_RESTARG_INHERITED = :ANONYMOUS_RESTARG_INHERITED
+
+    ANONYMOUS_KWRESTARG_IN_CURRENT_SCOPE = :ANONYMOUS_KWRESTARG_IN_CURRENT_SCOPE
+    ANONYMOUS_KWRESTARG_INHERITED = :ANONYMOUS_KWRESTARG_INHERITED
+
+    ANONYMOUS_BLOCKARG_IN_CURRENT_SCOPE = :ANONYMOUS_BLOCKARG_IN_CURRENT_SCOPE
+    ANONYMOUS_BLOCKARG_INHERITED = :ANONYMOUS_BLOCKARG_INHERITED
 
     def initialize
       reset
@@ -27,6 +33,15 @@ def extend_static
     def extend_dynamic
       @stack.push(@variables)
       @variables = @variables.dup
+      if @variables.delete(ANONYMOUS_BLOCKARG_IN_CURRENT_SCOPE)
+        @variables.add(ANONYMOUS_BLOCKARG_INHERITED)
+      end
+      if @variables.delete(ANONYMOUS_RESTARG_IN_CURRENT_SCOPE)
+        @variables.add(ANONYMOUS_RESTARG_INHERITED)
+      end
+      if @variables.delete(ANONYMOUS_KWRESTARG_IN_CURRENT_SCOPE)
+        @variables.add(ANONYMOUS_KWRESTARG_INHERITED)
+      end
 
       self
     end
@@ -47,6 +62,8 @@ def declared?(name)
       @variables.include?(name.to_sym)
     end
 
+    # Forward args
+
     def declare_forward_args
       declare(FORWARD_ARGS)
     end
@@ -55,40 +72,58 @@ def declared_forward_args?
       declared?(FORWARD_ARGS)
     end
 
+    # Anonymous blockarg
+
     def declare_anonymous_blockarg
-      declare(ANONYMOUS_BLOCKARG)
+      declare(ANONYMOUS_BLOCKARG_IN_CURRENT_SCOPE)
     end
 
     def declared_anonymous_blockarg?
-      declared?(ANONYMOUS_BLOCKARG)
+      declared?(ANONYMOUS_BLOCKARG_IN_CURRENT_SCOPE) || declared?(ANONYMOUS_BLOCKARG_INHERITED)
+    end
+
+    def declared_anonymous_blockarg_in_current_scpe?
+      declared?(ANONYMOUS_BLOCKARG_IN_CURRENT_SCOPE)
     end
 
     def parent_has_anonymous_blockarg?
-      @stack.any? { |variables| variables.include?(ANONYMOUS_BLOCKARG) }
+      @stack.any? { |variables| variables.include?(ANONYMOUS_BLOCKARG_IN_CURRENT_SCOPE) }
     end
 
+    # Anonymous restarg
+
     def declare_anonymous_restarg
-      declare(ANONYMOUS_RESTARG)
+      declare(ANONYMOUS_RESTARG_IN_CURRENT_SCOPE)
     end
 
     def declared_anonymous_restarg?
-      declared?(ANONYMOUS_RESTARG)
+      declared?(ANONYMOUS_RESTARG_IN_CURRENT_SCOPE) || declared?(ANONYMOUS_RESTARG_INHERITED)
+    end
+
+    def declared_anonymous_restarg_in_current_scope?
+      declared?(ANONYMOUS_RESTARG_IN_CURRENT_SCOPE)
     end
 
     def parent_has_anonymous_restarg?
-      @stack.any? { |variables| variables.include?(ANONYMOUS_RESTARG) }
+      @stack.any? { |variables| variables.include?(ANONYMOUS_RESTARG_IN_CURRENT_SCOPE) }
     end
 
+    # Anonymous kwresarg
+
     def declare_anonymous_kwrestarg
-      declare(ANONYMOUS_KWRESTARG)
+      declare(ANONYMOUS_KWRESTARG_IN_CURRENT_SCOPE)
     end
 
     def declared_anonymous_kwrestarg?
-      declared?(ANONYMOUS_KWRESTARG)
+      declared?(ANONYMOUS_KWRESTARG_IN_CURRENT_SCOPE) || declared?(ANONYMOUS_KWRESTARG_INHERITED)
+    end
+
+    def declared_anonymous_kwrestarg_in_current_scope?
+      declared?(ANONYMOUS_KWRESTARG_IN_CURRENT_SCOPE)
     end
 
     def parent_has_anonymous_kwrestarg?
-      @stack.any? { |variables| variables.include?(ANONYMOUS_KWRESTARG) }
+      @stack.any? { |variables| variables.include?(ANONYMOUS_KWRESTARG_IN_CURRENT_SCOPE) }
     end
 
     def empty?

test/test_parser.rb

@@ -11497,4 +11497,34 @@ def test_parser_bug_989
       %q{},
       ALL_VERSIONS)
   end
+
+  def test_parser_bug_19370
+    refute_diagnoses(
+      'def b(&) ->() {c(&)} end',
+      SINCE_3_3)
+
+    refute_diagnoses(
+      'def b(*) ->() {c(*)} end',
+      SINCE_3_3)
+
+    refute_diagnoses(
+      'def b(a, *) ->() {c(1, *)} end',
+      SINCE_3_3)
+
+    refute_diagnoses(
+      'def b(*) ->(a) {c(*)} end',
+      SINCE_3_3)
+
+    refute_diagnoses(
+      'def b(**) ->() {c(**)} end',
+      SINCE_3_3)
+
+    refute_diagnoses(
+      'def b(k:, **) ->() {c(k: 1, **)} end',
+      SINCE_3_3)
+
+    refute_diagnoses(
+      'def b(**) ->(k:) {c(**)} end',
+      SINCE_3_3)
+  end
 end