[embedded] Port Swift.String to embedded Swift

stdlib/public/core/ArrayShared.swift

@@ -41,14 +41,13 @@ func _allocateUninitializedArray<Element>(_  builtinCount: Builtin.Word)
   if count > 0 {
     // Doing the actual buffer allocation outside of the array.uninitialized
     // semantics function enables stack propagation of the buffer.
-    let storageType: _ContiguousArrayStorage<Element>.Type
     #if !$Embedded
-    storageType = getContiguousArrayStorageType(for: Element.self)
+    let bufferObject = Builtin.allocWithTailElems_1(
+       getContiguousArrayStorageType(for: Element.self), builtinCount, Element.self)
     #else
-    storageType = _ContiguousArrayStorage<Element>.self
-    #endif
     let bufferObject = Builtin.allocWithTailElems_1(
-       storageType, builtinCount, Element.self)
+       _ContiguousArrayStorage<Element>.self, builtinCount, Element.self)
+    #endif
 
     let (array, ptr) = Array<Element>._adoptStorage(bufferObject, count: count)
     return (array, ptr._rawValue)
@@ -122,7 +121,11 @@ extension Collection {
       } else {
         result += ", "
       }
+      #if !$Embedded
       debugPrint(item, terminator: "", to: &result)
+      #else
+      "(cannot print value in embedded Swift)".write(to: &result)
+      #endif
     }
     result += type != nil ? "])" : "]"
     return result

stdlib/public/core/Assert.swift

@@ -413,8 +413,10 @@ internal func _internalInvariant_5_1(
   // FIXME: The below won't run the assert on 5.1 stdlib if testing on older
   // OSes, which means that testing may not test the assertion. We need a real
   // solution to this.
+#if !$Embedded
   guard #available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *) //SwiftStdlib 5.1
   else { return }
+#endif
   _internalInvariant(condition(), message, file: file, line: line)
 #endif
 }
@@ -427,7 +429,6 @@ internal func _internalInvariant_5_1(
 /// **and** the current executable was built with a Swift Standard Library
 /// version equal to or greater than the supplied version.
 @_transparent
-@_unavailableInEmbedded
 internal func _precondition(
   ifLinkedOnOrAfter version: _SwiftStdlibVersion,
   _ condition: @autoclosure () -> Bool,
@@ -443,17 +444,22 @@ internal func _precondition(
   // unusual configuration.
   if _isDebugAssertConfiguration() {
     if _slowPath(!condition()) {
+      #if !$Embedded
       guard _isExecutableLinkedOnOrAfter(version) else { return }
+      #endif
       _assertionFailure("Fatal error", message, file: file, line: line,
         flags: _fatalErrorFlags())
     }
   } else if _isReleaseAssertConfiguration() {
+    #if !$Embedded
     let error = (!condition() && _isExecutableLinkedOnOrAfter(version))
+    #else
+    let error = !condition()
+    #endif
     Builtin.condfail_message(error._value, message.unsafeRawPointer)
   }
 }
 
-
 @usableFromInline @_transparent
 internal func _internalInvariantFailure(
   _ message: StaticString = StaticString(),

stdlib/public/core/Builtin.swift

@@ -731,9 +731,9 @@ func _isUnique_native<T>(_ object: inout T) -> Bool {
   _internalInvariant(
     (_bitPattern(Builtin.reinterpretCast(object)) & _objectPointerSpareBits)
     == 0)
-  #endif
   _internalInvariant(_usesNativeSwiftReferenceCounting(
       type(of: Builtin.reinterpretCast(object) as AnyObject)))
+  #endif
   return Bool(Builtin.isUnique_native(&object))
 }
 
@@ -1093,7 +1093,6 @@ func __abi_openExistential<ExistentialType, ContainedType, ResultType>(
 /// in the function containing the call to this SPI.
 @_transparent
 @_alwaysEmitIntoClient
-@_unavailableInEmbedded
 public // @SPI(OSLog)
 func _getGlobalStringTablePointer(_ constant: String) -> UnsafePointer<CChar> {
   return UnsafePointer<CChar>(Builtin.globalStringTablePointer(constant));

stdlib/public/core/CMakeLists.txt

@@ -34,12 +34,12 @@ split_embedded_sources(
   EMBEDDED ArrayBody.swift
   EMBEDDED ArrayBuffer.swift
   EMBEDDED ArrayBufferProtocol.swift
-    NORMAL ArrayCast.swift
+  EMBEDDED ArrayCast.swift
   EMBEDDED Array.swift
   EMBEDDED ArrayShared.swift
   EMBEDDED ArraySlice.swift
   EMBEDDED ArrayType.swift
-    NORMAL ASCII.swift
+  EMBEDDED ASCII.swift
   EMBEDDED Assert.swift
   EMBEDDED AssertCommon.swift
   EMBEDDED BidirectionalCollection.swift
@@ -50,7 +50,7 @@ split_embedded_sources(
     NORMAL BridgingBuffer.swift
   EMBEDDED Builtin.swift
   EMBEDDED BuiltinMath.swift
-    NORMAL Character.swift
+  EMBEDDED Character.swift
     NORMAL CocoaArray.swift
     NORMAL Codable.swift
   EMBEDDED Collection.swift
@@ -59,10 +59,10 @@ split_embedded_sources(
   EMBEDDED CompilerProtocols.swift
   EMBEDDED Sendable.swift
   EMBEDDED ContiguousArray.swift
-    NORMAL ContiguouslyStored.swift
+  EMBEDDED ContiguouslyStored.swift
   EMBEDDED ClosedRange.swift
   EMBEDDED ContiguousArrayBuffer.swift
-    NORMAL CString.swift
+  EMBEDDED CString.swift
   EMBEDDED CTypes.swift
     NORMAL DebuggerSupport.swift
   EMBEDDED Dictionary.swift
@@ -93,7 +93,7 @@ split_embedded_sources(
   EMBEDDED HashTable.swift
   EMBEDDED Identifiable.swift
   EMBEDDED Indices.swift
-    NORMAL InputStream.swift
+  EMBEDDED InputStream.swift
     NORMAL IntegerParsing.swift
   EMBEDDED Integers.swift
     NORMAL Join.swift
@@ -114,12 +114,12 @@ split_embedded_sources(
   EMBEDDED NativeDictionary.swift
   EMBEDDED NativeSet.swift
     NORMAL NewtypeWrapper.swift
-    NORMAL NFC.swift
-    NORMAL NFD.swift
+  EMBEDDED NFC.swift
+  EMBEDDED NFD.swift
   EMBEDDED ObjectIdentifier.swift
   EMBEDDED Optional.swift
   EMBEDDED OptionSet.swift
-    NORMAL OutputStream.swift
+  EMBEDDED OutputStream.swift
   EMBEDDED Pointer.swift
   EMBEDDED Policy.swift
     NORMAL PrefixWhile.swift
@@ -153,68 +153,68 @@ split_embedded_sources(
   EMBEDDED ShadowProtocols.swift
     NORMAL Shims.swift
   EMBEDDED Slice.swift
-    NORMAL SmallString.swift
+  EMBEDDED SmallString.swift
   EMBEDDED Sort.swift
   EMBEDDED StaticString.swift
-    NORMAL StaticPrint.swift
+  EMBEDDED StaticPrint.swift
   EMBEDDED Stride.swift
-    NORMAL StringHashable.swift  # ORDER DEPENDENCY: Must precede String.swift
-    NORMAL String.swift
-    NORMAL StringBreadcrumbs.swift
-    NORMAL StringBridge.swift
-    NORMAL StringCharacterView.swift
-    NORMAL StringComparable.swift
-    NORMAL StringComparison.swift
-    NORMAL StringCreate.swift
-    NORMAL StringGuts.swift
-    NORMAL StringGutsSlice.swift
-    NORMAL StringGutsRangeReplaceable.swift
-    NORMAL StringObject.swift
-    NORMAL StringProtocol.swift
-    NORMAL StringIndex.swift
-    NORMAL StringIndexConversions.swift
-    NORMAL StringIndexValidation.swift
-    NORMAL StringInterpolation.swift
-    NORMAL StringLegacy.swift
-    NORMAL StringNormalization.swift
-    NORMAL StringRangeReplaceableCollection.swift
-    NORMAL StringStorage.swift
-    NORMAL StringStorageBridge.swift
+  EMBEDDED StringHashable.swift  # ORDER DEPENDENCY: Must precede String.swift
+  EMBEDDED String.swift
+  EMBEDDED StringBreadcrumbs.swift
+  EMBEDDED StringBridge.swift
+  EMBEDDED StringCharacterView.swift
+  EMBEDDED StringComparable.swift
+  EMBEDDED StringComparison.swift
+  EMBEDDED StringCreate.swift
+  EMBEDDED StringGuts.swift
+  EMBEDDED StringGutsSlice.swift
+  EMBEDDED StringGutsRangeReplaceable.swift
+  EMBEDDED StringObject.swift
+  EMBEDDED StringProtocol.swift
+  EMBEDDED StringIndex.swift
+  EMBEDDED StringIndexConversions.swift
+  EMBEDDED StringIndexValidation.swift
+  EMBEDDED StringInterpolation.swift
+  EMBEDDED StringLegacy.swift
+  EMBEDDED StringNormalization.swift
+  EMBEDDED StringRangeReplaceableCollection.swift
+  EMBEDDED StringStorage.swift
+  EMBEDDED StringStorageBridge.swift
     NORMAL StringSwitch.swift
-    NORMAL StringTesting.swift
-    NORMAL StringUnicodeScalarView.swift
-    NORMAL StringUTF16View.swift
-    NORMAL StringUTF8View.swift
-    NORMAL StringUTF8Validation.swift
-    NORMAL StringWordBreaking.swift
-    NORMAL Substring.swift
+  EMBEDDED StringTesting.swift
+  EMBEDDED StringUnicodeScalarView.swift
+  EMBEDDED StringUTF16View.swift
+  EMBEDDED StringUTF8View.swift
+  EMBEDDED StringUTF8Validation.swift
+  EMBEDDED StringWordBreaking.swift
+  EMBEDDED Substring.swift
   EMBEDDED SwiftNativeNSArray.swift
   EMBEDDED TemporaryAllocation.swift
     NORMAL ThreadLocalStorage.swift
-    NORMAL UIntBuffer.swift
-    NORMAL UnavailableStringAPIs.swift
-    NORMAL UnicodeData.swift
-    NORMAL UnicodeEncoding.swift
-    NORMAL UnicodeBreakProperty.swift
-    NORMAL UnicodeHelpers.swift
-    NORMAL UnicodeParser.swift
-    NORMAL UnicodeScalarProperties.swift
-    NORMAL CharacterProperties.swift # ORDER DEPENDENCY: UnicodeScalarProperties.swift
-    NORMAL UnicodeSPI.swift
+  EMBEDDED UIntBuffer.swift
+  EMBEDDED UnavailableStringAPIs.swift
+  EMBEDDED UnicodeData.swift
+  EMBEDDED UnicodeEncoding.swift
+  EMBEDDED UnicodeBreakProperty.swift
+  EMBEDDED UnicodeHelpers.swift
+  EMBEDDED UnicodeParser.swift
+  EMBEDDED UnicodeScalarProperties.swift
+  EMBEDDED CharacterProperties.swift # ORDER DEPENDENCY: UnicodeScalarProperties.swift
+  EMBEDDED UnicodeSPI.swift
   EMBEDDED Unmanaged.swift
-    NORMAL UnmanagedOpaqueString.swift
-    NORMAL UnmanagedString.swift
+  EMBEDDED UnmanagedOpaqueString.swift
+  EMBEDDED UnmanagedString.swift
   EMBEDDED UnsafePointer.swift
   EMBEDDED UnsafeRawPointer.swift
-    NORMAL UTFEncoding.swift
-    NORMAL UTF8.swift
-    NORMAL UTF16.swift
-    NORMAL UTF32.swift
-    NORMAL Unicode.swift # ORDER DEPENDENCY: must follow new unicode support
-    NORMAL StringGraphemeBreaking.swift # ORDER DEPENDENCY: Must follow UTF16.swift
-    NORMAL ValidUTF8Buffer.swift
+  EMBEDDED UTFEncoding.swift
+  EMBEDDED UTF8.swift
+  EMBEDDED UTF16.swift
+  EMBEDDED UTF32.swift
+  EMBEDDED Unicode.swift # ORDER DEPENDENCY: must follow new unicode support
+  EMBEDDED StringGraphemeBreaking.swift # ORDER DEPENDENCY: Must follow UTF16.swift
+  EMBEDDED ValidUTF8Buffer.swift
   EMBEDDED WriteBackMutableSlice.swift
-    NORMAL MigrationSupport.swift
+  EMBEDDED MigrationSupport.swift
 
     ### "NON-ESSENTIAL" SOURCES, LAYERED ON TOP OF THE "ESSENTIAL" ONES
     ### -- PLEASE KEEP THIS LIST IN ALPHABETICAL ORDER ###
@@ -234,7 +234,7 @@ split_embedded_sources(
     NORMAL StaticBigInt.swift
   EMBEDDED UInt128.swift
     NORMAL UnfoldSequence.swift
-    NORMAL UnsafeBufferPointerSlice.swift
+  EMBEDDED UnsafeBufferPointerSlice.swift
     NORMAL VarArgs.swift
   EMBEDDED Zip.swift
     NORMAL "${SWIFT_SOURCE_DIR}/stdlib/linker-support/magic-symbols-for-install-name.c"
@@ -422,6 +422,7 @@ if(SWIFT_SHOULD_BUILD_EMBEDDED_STDLIB)
   set(SWIFT_STDLIB_SUPPORT_BACK_DEPLOYMENT OFF)
   set(SWIFT_STDLIB_STABLE_ABI OFF)
   set(SWIFT_STDLIB_ENABLE_OBJC_INTEROP OFF)
+  set(SWIFT_STDLIB_ENABLE_VECTOR_TYPES OFF)
 
   foreach(entry ${EMBEDDED_STDLIB_TARGET_TRIPLES})
     string(REGEX REPLACE "[ \t]+" ";" list "${entry}")

stdlib/public/core/CompilerProtocols.swift

@@ -792,7 +792,6 @@ public protocol ExpressibleByStringInterpolation
   init(stringInterpolation: StringInterpolation)
 }
 
-#if !$Embedded
 extension ExpressibleByStringInterpolation
   where StringInterpolation == DefaultStringInterpolation {
 
@@ -815,7 +814,6 @@ extension ExpressibleByStringInterpolation
     self.init(stringLiteral: stringInterpolation.make())
   }
 }
-#endif
 
 /// Represents the contents of a string literal with interpolations while it's
 /// being built up.

stdlib/public/core/Dictionary.swift

@@ -1702,9 +1702,15 @@ extension Collection {
       } else {
         result += ", "
       }
+      #if !$Embedded
       debugPrint(k, terminator: "", to: &result)
       result += ": "
       debugPrint(v, terminator: "", to: &result)
+      #else
+      "(cannot print value in embedded Swift)".write(to: &result)
+      result += ": "
+      "(cannot print value in embedded Swift)".write(to: &result)
+      #endif
     }
     result += "]"
     return result