NFC: Move Decl node handling to TextNodeDumper

Reviewers: aaron.ballman

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D56643

llvm-svn: 351175
diff --git a/clang/lib/AST/TextNodeDumper.cpp b/clang/lib/AST/TextNodeDumper.cpp
index 9e74024..189a518 100644
--- a/clang/lib/AST/TextNodeDumper.cpp
+++ b/clang/lib/AST/TextNodeDumper.cpp
@@ -12,11 +12,42 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/AST/TextNodeDumper.h"
+#include "clang/AST/DeclFriend.h"
+#include "clang/AST/DeclOpenMP.h"
 #include "clang/AST/DeclTemplate.h"
 #include "clang/AST/LocInfoType.h"
 
 using namespace clang;
 
+static void dumpPreviousDeclImpl(raw_ostream &OS, ...) {}
+
+template <typename T>
+static void dumpPreviousDeclImpl(raw_ostream &OS, const Mergeable<T> *D) {
+  const T *First = D->getFirstDecl();
+  if (First != D)
+    OS << " first " << First;
+}
+
+template <typename T>
+static void dumpPreviousDeclImpl(raw_ostream &OS, const Redeclarable<T> *D) {
+  const T *Prev = D->getPreviousDecl();
+  if (Prev)
+    OS << " prev " << Prev;
+}
+
+/// Dump the previous declaration in the redeclaration chain for a declaration,
+/// if any.
+static void dumpPreviousDecl(raw_ostream &OS, const Decl *D) {
+  switch (D->getKind()) {
+#define DECL(DERIVED, BASE)                                                    \
+  case Decl::DERIVED:                                                          \
+    return dumpPreviousDeclImpl(OS, cast<DERIVED##Decl>(D));
+#define ABSTRACT_DECL(DECL)
+#include "clang/AST/DeclNodes.inc"
+  }
+  llvm_unreachable("Decl that isn't part of DeclNodes.inc!");
+}
+
 TextNodeDumper::TextNodeDumper(raw_ostream &OS, bool ShowColors,
                                const SourceManager *SM,
                                const PrintingPolicy &PrintPolicy,
@@ -183,6 +214,50 @@
   OS << " " << T.split().Quals.getAsString();
 }
 
+void TextNodeDumper::Visit(const Decl *D) {
+  if (!D) {
+    ColorScope Color(OS, ShowColors, NullColor);
+    OS << "<<<NULL>>>";
+    return;
+  }
+
+  {
+    ColorScope Color(OS, ShowColors, DeclKindNameColor);
+    OS << D->getDeclKindName() << "Decl";
+  }
+  dumpPointer(D);
+  if (D->getLexicalDeclContext() != D->getDeclContext())
+    OS << " parent " << cast<Decl>(D->getDeclContext());
+  dumpPreviousDecl(OS, D);
+  dumpSourceRange(D->getSourceRange());
+  OS << ' ';
+  dumpLocation(D->getLocation());
+  if (D->isFromASTFile())
+    OS << " imported";
+  if (Module *M = D->getOwningModule())
+    OS << " in " << M->getFullModuleName();
+  if (auto *ND = dyn_cast<NamedDecl>(D))
+    for (Module *M : D->getASTContext().getModulesWithMergedDefinition(
+             const_cast<NamedDecl *>(ND)))
+      AddChild([=] { OS << "also in " << M->getFullModuleName(); });
+  if (const NamedDecl *ND = dyn_cast<NamedDecl>(D))
+    if (ND->isHidden())
+      OS << " hidden";
+  if (D->isImplicit())
+    OS << " implicit";
+
+  if (D->isUsed())
+    OS << " used";
+  else if (D->isThisDeclarationReferenced())
+    OS << " referenced";
+
+  if (D->isInvalidDecl())
+    OS << " invalid";
+  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
+    if (FD->isConstexpr())
+      OS << " constexpr";
+}
+
 void TextNodeDumper::dumpPointer(const void *Ptr) {
   ColorScope Color(OS, ShowColors, AddressColor);
   OS << ' ' << Ptr;