ABI Checker: use lower-cased decl keywords to be consistent with source. NFC

include/swift/IDE/APIDigesterData.h

@@ -65,7 +65,7 @@ raw_ostream &operator<<(raw_ostream &Out, const NodeAnnotation Value);
 // Redefine << so that we can output the name of the node kind.
 raw_ostream &operator<<(raw_ostream &Out, const SDKNodeKind Value);
 
-StringRef getDeclKindStr(const DeclKind Value);
+StringRef getDeclKindStr(const DeclKind Value, bool lower);
 
 // Redefine << so that we can output the name of decl kind.
 raw_ostream &operator<<(raw_ostream &Out, const DeclKind Value);

lib/IDE/APIDigesterData.cpp

@@ -39,7 +39,7 @@ operator<<(raw_ostream &Out, const NodeAnnotation Value) {
   llvm_unreachable("Undefined SDK node kind.");
 }
 
-StringRef swift::ide::api::getDeclKindStr(const DeclKind Value)  {
+static StringRef getDeclKindStrRaw(const DeclKind Value)  {
   switch (Value) {
 #define DECL(X, PARENT) case DeclKind::X: return #X;
 #include "swift/AST/DeclNodes.def"
@@ -47,9 +47,22 @@ StringRef swift::ide::api::getDeclKindStr(const DeclKind Value)  {
   llvm_unreachable("Unhandled DeclKind in switch.");
 }
 
-raw_ostream &swift::ide::api::operator<<(raw_ostream &Out,
-    const DeclKind Value) {
-  return Out << getDeclKindStr(Value);
+StringRef swift::ide::api::getDeclKindStr(const DeclKind Value, bool lower) {
+  if (lower) {
+    switch (Value) {
+#define DECL(X, PARENT) case DeclKind::X: {                                   \
+    static std::string lowered = StringRef(#X).lower();                       \
+    return lowered;                                                           \
+    }
+#include "swift/AST/DeclNodes.def"
+    }
+  } else {
+    return getDeclKindStrRaw(Value);
+  }
+}
+
+raw_ostream &swift::ide::api::operator<<(raw_ostream &Out, const DeclKind Value) {
+  return Out << getDeclKindStrRaw(Value);
 }
 
 Optional<SDKNodeKind> swift::ide::api::parseSDKNodeKind(StringRef Content) {

test/api-digester/breakage-allowlist.swift

@@ -10,9 +10,9 @@
 // RUN: echo "public func foo() {}" > %t.mod1/Foo.swift
 // RUN: echo "public func bar() {}" > %t.mod2/Foo.swift
 
-// RUN: echo "Foo: Func foo() has been removed" > %t/incomplete-allowlist.txt
-// RUN: echo "Foo: Func foo() has been removed" > %t/complete-allowlist.txt
-// RUN: echo "Foo: Func bar() is a new API without @available attribute" >> %t/complete-allowlist.txt
+// RUN: echo "Foo: func foo() has been removed" > %t/incomplete-allowlist.txt
+// RUN: echo "Foo: func foo() has been removed" > %t/complete-allowlist.txt
+// RUN: echo "Foo: func bar() is a new API without @available attribute" >> %t/complete-allowlist.txt
 
 // RUN: %target-swift-frontend -disable-objc-attr-requires-foundation-module -emit-module -o %t.mod1/Foo.swiftmodule  %t.mod1/Foo.swift -parse-as-library -enable-library-evolution -emit-module-source-info -emit-module-source-info-path %t.mod1/Foo.swiftsourceinfo -emit-module-interface-path %t.mod1/Foo.swiftinterface -module-name Foo -swift-version 5
 

test/api-digester/compare-dump-abi.swift

@@ -18,5 +18,5 @@
 // RUN: not %api-digester -diagnose-sdk -print-module -baseline-dir %t.baseline -module cake -I %t.mod2 -I %S/Inputs/APINotesLeft -module-cache-path %t.module-cache %clang-importer-sdk-nosource -abi -o %t.result -compiler-style-diags 2> %t.abi.compiler.diags
 // RUN: %FileCheck %s < %t.abi.compiler.diags
 
-// CHECK: cake_current/cake.swift:39:15: error: cake: Struct C6 is now with @frozen
-// CHECK: cake_current/cake.swift:41:13: error: cake: Enum IceKind is now without @frozen
+// CHECK: cake_current/cake.swift:39:15: error: cake: struct C6 is now with @frozen
+// CHECK: cake_current/cake.swift:41:13: error: cake: enum IceKind is now without @frozen

tools/swift-api-digester/ModuleAnalyzerNodes.cpp

@@ -419,10 +419,12 @@ StringRef SDKNodeDecl::getScreenInfo() const {
   if (auto *TD = dyn_cast<SDKNodeDeclType>(this)) {
     IsExtension = TD->isExternal();
   }
-  if (IsExtension)
-    OS << "Extension";
-  else
-    OS << getDeclKind();
+
+  // There is no particular reasons why we don't use lower-cased keyword names
+  // in non-CompilerStyle mode. This is to be backward compatible so clients
+  // don't need to update existing known breakages.
+  OS << getDeclKindStr(IsExtension? DeclKind::Extension : getDeclKind(),
+                       getSDKContext().getOpts().CompilerStyle);
   OS << " " << getFullyQualifiedName();
   return Ctx.buffer(OS.str());
 }

tools/swift-api-digester/ModuleAnalyzerNodes.h

@@ -154,6 +154,7 @@ struct CheckerOptions {
   bool PrintModule;
   bool SwiftOnly;
   bool SkipOSCheck;
+  bool CompilerStyle;
   bool Migrator;
   StringRef LocationFilter;
   std::vector<std::string> ToolArgs;

tools/swift-api-digester/swift-api-digester.cpp

@@ -794,7 +794,8 @@ void swift::ide::api::SDKNodeDeclType::diagnose(SDKNode *Right) {
     return;
   auto Loc = R->getLoc();
   if (getDeclKind() != R->getDeclKind()) {
-    emitDiag(Loc, diag::decl_kind_changed, getDeclKindStr(R->getDeclKind()));
+    emitDiag(Loc, diag::decl_kind_changed, getDeclKindStr(R->getDeclKind(),
+      getSDKContext().getOpts().CompilerStyle));
     return;
   }
 
@@ -986,7 +987,8 @@ void swift::ide::api::SDKNodeDeclOperator::diagnose(SDKNode *Right) {
     return;
   auto Loc = RO->getLoc();
   if (getDeclKind() != RO->getDeclKind()) {
-    emitDiag(Loc, diag::decl_kind_changed, getDeclKindStr(RO->getDeclKind()));
+    emitDiag(Loc, diag::decl_kind_changed, getDeclKindStr(RO->getDeclKind(),
+      getSDKContext().getOpts().CompilerStyle));
   }
 }
 
@@ -2121,7 +2123,8 @@ void DiagnosisEmitter::handle(const SDKNodeDecl *Node, NodeAnnotation Anno) {
     if (auto *Added = findAddedDecl(Node)) {
       if (Node->getDeclKind() != DeclKind::Constructor) {
         Node->emitDiag(Added->getLoc(), diag::moved_decl,
-          Ctx.buffer((Twine(getDeclKindStr(Added->getDeclKind())) + " " +
+          Ctx.buffer((Twine(getDeclKindStr(Added->getDeclKind(),
+            Ctx.getOpts().CompilerStyle)) + " " +
             Added->getFullyQualifiedName()).str()));
         return;
       }
@@ -2133,7 +2136,8 @@ void DiagnosisEmitter::handle(const SDKNodeDecl *Node, NodeAnnotation Anno) {
       [&](TypeMemberDiffItem &Item) { return Item.usr == Node->getUsr(); });
     if (It != MemberChanges.end()) {
       Node->emitDiag(SourceLoc(), diag::renamed_decl,
-        Ctx.buffer((Twine(getDeclKindStr(Node->getDeclKind())) + " " +
+        Ctx.buffer((Twine(getDeclKindStr(Node->getDeclKind(),
+          Ctx.getOpts().CompilerStyle)) + " " +
           It->newTypeName + "." + It->newPrintedName).str()));
       return;
     }
@@ -2190,7 +2194,8 @@ void DiagnosisEmitter::handle(const SDKNodeDecl *Node, NodeAnnotation Anno) {
       DiagLoc = CD->getLoc();
     }
     Node->emitDiag(DiagLoc, diag::renamed_decl,
-        Ctx.buffer((Twine(getDeclKindStr(Node->getDeclKind())) + " " +
+        Ctx.buffer((Twine(getDeclKindStr(Node->getDeclKind(),
+          Ctx.getOpts().CompilerStyle)) + " " +
           Node->getAnnotateComment(NodeAnnotation::RenameNewName)).str()));
     return;
   }
@@ -2701,6 +2706,8 @@ static CheckerOptions getCheckOpts(int argc, char *argv[]) {
   // the checking logics are language-specific.
   Opts.SwiftOnly = options::Abi || options::SwiftOnly;
   Opts.SkipOSCheck = options::DisableOSChecks;
+  Opts.CompilerStyle = options::CompilerStyleDiags ||
+    !options::SerializedDiagPath.empty();
   for (int i = 1; i < argc; ++i)
     Opts.ToolArgs.push_back(argv[i]);