Add ‘asttree’ predicate to stats command, courtesy of vkhristenko.

lib/Interpreter/Interpreter.cpp

@@ -38,6 +38,7 @@
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/CodeGen/ModuleBuilder.h"
+#include "clang/Frontend/ASTConsumers.h"
 #include "clang/Frontend/CompilerInstance.h"
 #include "clang/Frontend/Utils.h"
 #include "clang/Lex/Preprocessor.h"
@@ -469,7 +470,12 @@ namespace cling {
   // FIXME: Add stream argument and move DumpIncludePath path here.
   void Interpreter::dump(llvm::StringRef what, llvm::StringRef filter) {
     llvm::raw_ostream &where = cling::log();
-    if (what.equals("ast"))
+    if (what.equals("asttree")) {
+      std::unique_ptr<clang::ASTConsumer> printer =
+          clang::CreateASTDumper(filter, true  /*DumpDecls*/,
+                                         false /*DumpLookups*/ );
+      printer->HandleTranslationUnit(getSema().getASTContext());
+    } else if (what.equals("ast"))
       getSema().getASTContext().PrintStats();
     else if (what.equals("decl"))
       ClangInternalState::printLookupTables(where, getSema().getASTContext());

lib/MetaProcessor/MetaSema.cpp

@@ -360,6 +360,7 @@ namespace cling {
       "\n"
       "   " << metaString << "stats [name]\t\t- Show stats for internal data structures\n"
                              "\t\t\t\t  'ast'  abstract syntax tree stats\n"
+                             "\t\t\t\t  'asttree [filter]'  abstract syntax tree layout\n"
                              "\t\t\t\t  'decl' dump ast declarations\n"
                              "\t\t\t\t  'undo' show undo stack\n"
       "\n"