Replace every Symbol | string & equiv. with the new interned

core/basic_object.rbs

@@ -163,7 +163,7 @@ class BasicObject
   #     k = Klass.new
   #     k.send :hello, "gentle", "readers"   #=> "Hello gentle readers"
   #
-  def __send__: (String | Symbol arg0, *untyped args) -> untyped
+  def __send__: (interned arg0, *untyped args) -> untyped
 
   # <!-- rdoc-file=object.c -->
   # Equality --- At the Object level, #== returns `true` only if `obj` and `other`

core/builtin.rbs

@@ -266,7 +266,12 @@ type real = Integer | Float | Rational
 #
 # A lot of builtin functions accept either a Symbol, a String, or something which has `.to_str`
 # defined.
+# 
 type interned = Symbol | string
+# Previous incarnations of `interned` for backward-compatibility (see #1499)
+%a{steep:deprecated} type Object::name = interned
+%a{steep:deprecated} type Module::id = interned
+%a{steep:deprecated} type Net::HTTPHeader::key = interned
 
 # `boolish` is a type for documentation.
 # It means the value of this type is only for testing a condition.

core/fiber.rbs

@@ -268,7 +268,7 @@ class Fiber < Object
   # Explicitly using `storage: true` is currently experimental and may change in
   # the future.
   #
-  def initialize: (?blocking: boolish, ?storage: true | Hash[Symbol | String, untyped] | nil) { (*untyped) -> void } -> void
+  def initialize: (?blocking: boolish, ?storage: true | Hash[interned, untyped] | nil) { (*untyped) -> void } -> void
 
   # <!--
   #   rdoc-file=cont.c
@@ -414,7 +414,7 @@ class Fiber < Object
   # Returns a copy of the storage hash for the fiber. The method can only be
   # called on the Fiber.current.
   #
-  def storage: () -> Hash[Symbol | String, untyped]
+  def storage: () -> Hash[interned, untyped]
 
   # <!--
   #   rdoc-file=cont.c
@@ -438,7 +438,7 @@ class Fiber < Object
   #       handle_request(request)
   #     end
   #
-  def storage=: (Hash[Symbol | String, untyped]) -> Hash[Symbol | String, untyped]
+  def storage=: (Hash[interned, untyped]) -> Hash[interned, untyped]
 
   # <!--
   #   rdoc-file=cont.c

core/kernel.rbs

@@ -745,7 +745,7 @@ module Kernel : BasicObject
   # If *const* is defined as autoload, the file name to be loaded is replaced with
   # *filename*.  If *const* is defined but not as autoload, does nothing.
   #
-  def self?.autoload: (String | Symbol _module, String filename) -> NilClass
+  def self?.autoload: (interned _module, String filename) -> NilClass
 
   # <!--
   #   rdoc-file=load.c
@@ -756,7 +756,7 @@ module Kernel : BasicObject
   #     autoload(:B, "b")
   #     autoload?(:B)            #=> "b"
   #
-  def self?.autoload?: (Symbol | String name) -> String?
+  def self?.autoload?: (interned name) -> String?
 
   # <!--
   #   rdoc-file=proc.c

core/match_data.rbs

@@ -83,7 +83,7 @@ class MatchData
   def []: (Integer idx) -> String?
         | (Integer start, Integer length) -> ::Array[String?]
         | (::Range[Integer] range) -> ::Array[String?]
-        | (String | Symbol name) -> String?
+        | (interned name) -> String?
 
   # <!--
   #   rdoc-file=re.c
@@ -121,7 +121,7 @@ class MatchData
   #
   # Related: MatchData#end, MatchData#offset, MatchData#byteoffset.
   #
-  def begin: (Integer | String | Symbol n_or_name) -> Integer?
+  def begin: (Integer | interned n_or_name) -> Integer?
 
   # <!--
   #   rdoc-file=re.c
@@ -139,7 +139,7 @@ class MatchData
   #     p m.byteoffset(:foo) #=> [0, 1]
   #     p m.byteoffset(:bar) #=> [2, 3]
   #
-  def byteoffset: (Integer | Symbol | String n_or_name) -> ([ Integer, Integer ] | [ nil, nil ])
+  def byteoffset: (Integer | interned n_or_name) -> ([ Integer, Integer ] | [ nil, nil ])
 
   # <!--
   #   rdoc-file=re.c
@@ -221,7 +221,7 @@ class MatchData
   #
   # Related: MatchData#begin, MatchData#offset, MatchData#byteoffset.
   #
-  def end: (Integer | String | Symbol n_or_name) -> Integer?
+  def end: (Integer | interned n_or_name) -> Integer?
 
   # <!--
   #   rdoc-file=re.c
@@ -348,7 +348,7 @@ class MatchData
   #     m.match('foo') # => "h"
   #     m.match(:bar)  # => "ge"
   #
-  def match: (int | String | Symbol) -> String?
+  def match: (int | interned) -> String?
 
   # <!--
   #   rdoc-file=re.c
@@ -375,7 +375,7 @@ class MatchData
   #     m.match_length('foo') # => 1
   #     m.match_length(:bar)  # => 2
   #
-  def match_length: (int | String | Symbol) -> Integer?
+  def match_length: (int | interned) -> Integer?
 
   # <!--
   #   rdoc-file=re.c
@@ -414,7 +414,7 @@ class MatchData
   #
   # Related: MatchData#byteoffset, MatchData#begin, MatchData#end.
   #
-  def offset: (Integer | Symbol | String n_or_name) -> ([ Integer, Integer ] | [ nil, nil ])
+  def offset: (Integer | interned n_or_name) -> ([ Integer, Integer ] | [ nil, nil ])
 
   # <!--
   #   rdoc-file=re.c
@@ -544,7 +544,7 @@ class MatchData
   #     m.values_at(0, 1..2, :a, :b, :op)
   #     # => ["1 + 2", "1", "+", "1", "2", "+"]
   #
-  def values_at: (*Integer | Symbol | String n_or_name) -> ::Array[String?]
+  def values_at: (*Integer | interned n_or_name) -> ::Array[String?]
 
   private