use %a{implicitly-returns-nil} on [] for now

sampersand · sampersand · commit d1b62d830bc8 · 2025-11-03T18:50:20.000-08:00
diff --git a/core/hash.rbs b/core/hash.rbs
@@ -646,7 +646,7 @@ class Hash[unchecked out K, unchecked out V]
   #     h = {foo: 0, bar: 1, baz: 2}
   #     h[:nosuch] # => nil
   #
-  def []: (_Key key) -> V?
+  def []: %a{implicitly-returns-nil} (_Key key) -> V
 
   # <!--
   #   rdoc-file=hash.c

Original file line number	Diff line number	Diff line change
`@@ -646,7 +646,7 @@ class Hash[unchecked out K, unchecked out V]`
`646`	`646`	`# h = {foo: 0, bar: 1, baz: 2}`
`647`	`647`	`# h[:nosuch] # => nil`
`648`	`648`	`#`
`649`		`- def []: (_Key key) -> V?`
	`649`	`+ def []: %a{implicitly-returns-nil} (_Key key) -> V`
`650`	`650`
`651`	`651`	`# <!--`
`652`	`652`	`# rdoc-file=hash.c`