Prespecialize common metadata (swiftlang#31925)

Author: airspeedswift

stdlib/public/core/CMakeLists.txt

@@ -107,6 +107,7 @@ set(SWIFTLIB_ESSENTIAL
   Pointer.swift
   Policy.swift
   PrefixWhile.swift
+  Prespecialize.swift
   Print.swift
   PtrAuth.swift
   Random.swift

stdlib/public/core/GroupInfo.json

@@ -209,6 +209,7 @@
     "OptionSet.swift",
     "OutputStream.swift",
     "Policy.swift",
+    "Prespecialize.swift",
     "Print.swift",
     "REPL.swift",
     "Random.swift",

stdlib/public/core/Prespecialize.swift

@@ -0,0 +1,96 @@
+@inline(never)
+private func consume<T>(_ t: T) {
+    withExtendedLifetime(t) { t in }
+}
+@usableFromInline
+internal func _prespecialize() {
+  consume(Array<()>.self)
+  consume(Array<(Optional<String>, Any)>.self)
+  consume(Array<Any>.self)
+  consume(Array<AnyHashable>.self)
+  consume(Array<Dictionary<String, Any>>.self)
+  consume(Array<Dictionary<String, AnyObject>>.self)
+  consume(Array<Int64>.self)
+  consume(Array<Int>.self)
+  consume(Array<Optional<Any>>.self)
+  consume(Array<Optional<String>>.self)
+  consume(ClosedRange<Int>.self)
+  consume(ContiguousArray<(AnyHashable, Any)>.self)
+  consume(ContiguousArray<(Optional<String>, Any)>.self)
+  consume(ContiguousArray<Any>.self)
+  consume(ContiguousArray<AnyHashable>.self)
+  consume(ContiguousArray<Dictionary<String, AnyObject>>.self)
+  consume(ContiguousArray<Int64>.self)
+  consume(ContiguousArray<String>.self)
+  consume(Dictionary<String, String>.Index.self)
+  consume(Dictionary<String, String>.Iterator.self)
+  consume(Dictionary<AnyHashable, Any>.self)
+  consume(Dictionary<AnyHashable, Any>.Iterator.self)
+  consume(Dictionary<AnyHashable, AnyHashable>.self)
+  consume(Dictionary<AnyHashable, AnyHashable>.Iterator.self)
+  consume(Dictionary<AnyHashable, AnyObject>.self)
+  consume(Dictionary<String, Any>.self)
+  consume(Dictionary<String, Any>.Iterator.self)
+  consume(Dictionary<String, AnyHashable>.self)
+  consume(Dictionary<String, AnyObject>.self)
+  consume(Dictionary<String, Array<String>>.self)
+  consume(Dictionary<String, Dictionary<String, Any>>.self)
+  consume(Dictionary<String, String>.self)
+  consume(Dictionary<String, UInt8>.self)
+  consume(IndexingIterator<Array<Dictionary<String, AnyObject>>>.self)
+  consume(IndexingIterator<Array<Int>>.self)
+  consume(IndexingIterator<Array<String>>.self)
+  consume(IndexingIterator<ClosedRange<Int>>.self)
+  consume(IndexingIterator<Range<Int>>.self)
+  consume(IndexingIterator<String.UTF8View>.self)
+  consume(Optional<()>.self)
+  consume(Optional<(Any, Any)>.self)
+  consume(Optional<(AnyHashable, Any)>.self)
+  consume(Optional<(AnyHashable, AnyHashable)>.self)
+  consume(Optional<(CodingUserInfoKey, Any)>.self)
+  consume(Optional<(Int64, Bool)>.self)
+  consume(Optional<(Optional<String>, Any)>.self)
+  consume(Optional<(String, Any)>.self)
+  consume(Optional<(String, AnyObject)>.self)
+  consume(Optional<(String, Array<String>)>.self)
+  consume(Optional<(String, Int64)>.self)
+  consume(Optional<(String, String)>.self)
+  consume(Optional<(String, UInt8)>.self)
+  consume(Optional<Any>.self)
+  consume(Optional<AnyObject>.self)
+  consume(Optional<Array<Int64>>.self)
+  consume(Optional<Array<String>>.self)
+  consume(Optional<Bool>.self)
+  consume(Optional<CodingKey>.self)
+  consume(Optional<CodingUserInfoKey>.self)
+  consume(Optional<CustomDebugStringConvertible>.self)
+  consume(Optional<CustomReflectable>.self)
+  consume(Optional<CustomStringConvertible>.self)
+  consume(Optional<Dictionary<AnyHashable, Any>>.self)
+  consume(Optional<Dictionary<String, Any>>.self)
+  consume(Optional<Dictionary<String, AnyObject>>.self)
+  consume(Optional<Dictionary<String, Array<String>>>.self)
+  consume(Optional<Dictionary<String, String>>.self)
+  consume(Optional<Double>.self)
+  consume(Optional<Int64>.self)
+  consume(Optional<Int8>.self)
+  consume(Optional<Mirror.DisplayStyle>.self)
+  consume(Optional<Optional<Int64>>.self)
+  consume(Optional<Optional<String>>.self)
+  consume(Optional<Set<String>>.self)
+  consume(Optional<TextOutputStreamable>.self)
+  consume(Optional<UInt8>.self)
+  consume(Optional<UnsafeBufferPointer<AnyObject>>.self)
+  consume(PartialRangeFrom<Int>.self)
+  consume(Range<String.Index>.self)
+  consume(ReversedCollection<Range<Int>>.self)
+  consume(ReversedCollection<Range<Int>>.Iterator.self)
+  consume(Set<Int>.self)
+  consume(Set<String>.self)
+  consume(Set<String>.Iterator.self)
+  consume(Set<String>.self)
+  consume(Unmanaged<AnyObject>.self)
+  consume(UnsafeBufferPointer<AnyObject>.self)
+  consume(UnsafeBufferPointer<Int8>.self)
+  consume(UnsafePointer<Int8>.self)
+}