swift-api-digester: detect type to type alias change up-front to remove bogus diagnostics.

test/api-digester/source-stability.swift

@@ -1,10 +1,9 @@
 // REQUIRES: OS=macosx
 // RUN: %empty-directory(%t.tmp)
 // mkdir %t.tmp/module-cache && mkdir %t.tmp/dummy.sdk
-// RUN: %api-digester -dump-sdk -module Swift -o %t.tmp/current-stdlib.json -module-cache-path %t.tmp/module-cache -sdk %t.tmp/dummy.sdk -swift-version 3
+// RUN: %api-digester -dump-sdk -module Swift -o %t.tmp/current-stdlib.json -module-cache-path %t.tmp/module-cache -sdk %t.tmp/dummy.sdk
 // RUN: %api-digester -diagnose-sdk -input-paths %S/stdlib-stable.json -input-paths %t.tmp/current-stdlib.json >> %t.tmp/changes.txt
 // RUN: %clang -E -P -x c %S/source-stability.swift.expected -o - | sed '/^\s*$/d' > %t.tmp/source-stability.swift.expected
 // RUN: %clang -E -P -x c %t.tmp/changes.txt -o - | sed '/^\s*$/d' > %t.tmp/changes.txt.tmp
 // RUN: diff -u %t.tmp/source-stability.swift.expected %t.tmp/changes.txt.tmp
 
-// REQUIRES: rdar_43425867

test/api-digester/source-stability.swift.expected

@@ -1,15 +1,83 @@
-/* FIXME: Bogus */
-TypeAlias DictionaryIterator.Element has been removed
-TypeAlias SetIterator.Element has been removed
-Var DictionaryIterator.customMirror has been removed
-Var SetIterator.customMirror has been removed
-Func DictionaryIterator.next() has been removed
-Func SetIterator.next() has been removed
-
-/* Renamed Decls (FIXME: Targets are Dictionary.Iterator & Set.Iterator) */
-Struct DictionaryIterator has been renamed to Struct Iterator
-Struct SetIterator has been renamed to Struct Iterator
-
-/* FIXME: Bogus */
+
+/* Generic Signature Changes */
+
+/* RawRepresentable Changes */
+
+/* Removed Decls */
+TypeAlias AbsoluteValuable has been removed
+TypeAlias BitwiseOperations has been removed (deprecated)
+TypeAlias IntMax has been removed
+TypeAlias Integer has been removed
+TypeAlias IntegerArithmetic has been removed
+TypeAlias SignedNumber has been removed
+TypeAlias StringProtocol.UTF16Index has been removed (deprecated)
+TypeAlias StringProtocol.UTF8Index has been removed (deprecated)
+TypeAlias StringProtocol.UnicodeScalarIndex has been removed (deprecated)
+TypeAlias UIntMax has been removed
+Var FixedWidthInteger.allZeros has been removed (deprecated)
+Constructor Int.init(truncatingBitPattern:) has been removed
+Constructor Int16.init(truncatingBitPattern:) has been removed
+Constructor Int32.init(truncatingBitPattern:) has been removed
+Constructor Int8.init(truncatingBitPattern:) has been removed
+Constructor String.init(_:obsoletedInSwift4:) has been removed
+Constructor UInt.init(truncatingBitPattern:) has been removed
+Constructor UInt16.init(truncatingBitPattern:) has been removed
+Constructor UInt32.init(truncatingBitPattern:) has been removed
+Constructor UInt8.init(truncatingBitPattern:) has been removed
+Func BinaryInteger.toIntMax() has been removed
+Func FixedWidthInteger.addWithOverflow(_:_:) has been removed
+Func FixedWidthInteger.divideWithOverflow(_:_:) has been removed
+Func FixedWidthInteger.multiplyWithOverflow(_:_:) has been removed
+Func FixedWidthInteger.remainderWithOverflow(_:_:) has been removed
+Func FixedWidthInteger.subtractWithOverflow(_:_:) has been removed
+Func FloatingPoint.abs(_:) has been removed (deprecated)
+Func FloatingPoint.add(_:) has been removed
+Func FloatingPoint.adding(_:) has been removed
+Func FloatingPoint.divide(by:) has been removed
+Func FloatingPoint.divided(by:) has been removed
+Func FloatingPoint.multiplied(by:) has been removed
+Func FloatingPoint.multiply(by:) has been removed
+Func FloatingPoint.negated() has been removed
+Func FloatingPoint.subtract(_:) has been removed
+Func FloatingPoint.subtracting(_:) has been removed
+Func Int.toUIntMax() has been removed
+Func Int16.toUIntMax() has been removed
+Func Int32.toUIntMax() has been removed
+Func Int64.toUIntMax() has been removed
+Func Int8.toUIntMax() has been removed
+Func Sequence.flatMap(_:) has been removed
+Func SignedNumeric.abs(_:) has been removed
+Func String.UTF16View.distance(from:to:) has been removed
+Func String.UTF16View.index(_:offsetBy:) has been removed
+Func String.UTF16View.index(after:) has been removed
+Func String.UTF8View.distance(from:to:) has been removed
+Func String.UTF8View.index(_:offsetBy:) has been removed
+Func String.UTF8View.index(after:) has been removed
+Func String.UnicodeScalarView.distance(from:to:) has been removed
+Func String.UnicodeScalarView.index(_:offsetBy:) has been removed
+Func String.UnicodeScalarView.index(after:) has been removed
+Func String.UnicodeScalarView.popFirst() has been removed (deprecated)
+Func String.popFirst() has been removed (deprecated)
+Func UInt.toIntMax() has been removed
+Func UInt16.toIntMax() has been removed
+Func UInt32.toIntMax() has been removed
+Func UInt64.toIntMax() has been removed
+Func UInt8.toIntMax() has been removed
+Func UnsignedInteger.toUIntMax() has been removed
+
+/* Moved Decls */
+
+/* Renamed Decls */
+Func Dictionary.filter(_:obsoletedInSwift4:) has been renamed to Func Dictionary.filter(_:)
+Func Set.filter(_:obsoletedInSwift4:) has been renamed to Func Set.filter(_:)
+
+/* Type Changes */
+Var Dictionary.keys has declared type change from LazyMapCollection<[Key : Value], Key> to Dictionary<Key, Value>.Keys
+Var Dictionary.values has declared type change from LazyMapCollection<[Key : Value], Value> to Dictionary<Key, Value>.Values
+Constructor String.init(_:) has return type change from String? to String
+Func Dictionary.filter(_:obsoletedInSwift4:) has return type change from [Dictionary<Key, Value>.Element] to [Dictionary<Key, Value>.Key : Dictionary<Key, Value>.Value]
 Func Dictionary.makeIterator() has return type change from DictionaryIterator<Dictionary<Key, Value>.Key, Dictionary<Key, Value>.Value> to Dictionary<Key, Value>.Iterator
+Func Set.filter(_:obsoletedInSwift4:) has return type change from [Set<Element>.Element] to Set<Element>
 Func Set.makeIterator() has return type change from SetIterator<Element> to Set<Element>.Iterator
+
+/* Decl Attribute changes */