NFC: Extract TextTreeStructure class

Reviewers: aaron.ballman

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D55188

llvm-svn: 348410

1 files changed, 6 insertions, 145 deletions

diff --git a/clang/lib/AST/ASTDumper.cpp b/clang/lib/AST/ASTDumper.cpp
index 069881f9e22..3afb2c9dc0c 100644
--- a/clang/lib/AST/ASTDumper.cpp
+++ b/clang/lib/AST/ASTDumper.cpp
@@ -13,6 +13,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/AST/ASTContext.h"
+#include "clang/AST/ASTDumperUtils.h"
 #include "clang/AST/Attr.h"
 #include "clang/AST/CommentVisitor.h"
 #include "clang/AST/DeclCXX.h"
@@ -35,78 +36,6 @@ using namespace clang::comments;
 //===----------------------------------------------------------------------===//
 
 namespace  {
-  // Colors used for various parts of the AST dump
-  // Do not use bold yellow for any text.  It is hard to read on white screens.
-
-  struct TerminalColor {
-    raw_ostream::Colors Color;
-    bool Bold;
-  };
-
-  // Red           - CastColor
-  // Green         - TypeColor
-  // Bold Green    - DeclKindNameColor, UndeserializedColor
-  // Yellow        - AddressColor, LocationColor
-  // Blue          - CommentColor, NullColor, IndentColor
-  // Bold Blue     - AttrColor
-  // Bold Magenta  - StmtColor
-  // Cyan          - ValueKindColor, ObjectKindColor
-  // Bold Cyan     - ValueColor, DeclNameColor
-
-  // Decl kind names (VarDecl, FunctionDecl, etc)
-  static const TerminalColor DeclKindNameColor = { raw_ostream::GREEN, true };
-  // Attr names (CleanupAttr, GuardedByAttr, etc)
-  static const TerminalColor AttrColor = { raw_ostream::BLUE, true };
-  // Statement names (DeclStmt, ImplicitCastExpr, etc)
-  static const TerminalColor StmtColor = { raw_ostream::MAGENTA, true };
-  // Comment names (FullComment, ParagraphComment, TextComment, etc)
-  static const TerminalColor CommentColor = { raw_ostream::BLUE, false };
-
-  // Type names (int, float, etc, plus user defined types)
-  static const TerminalColor TypeColor = { raw_ostream::GREEN, false };
-
-  // Pointer address
-  static const TerminalColor AddressColor = { raw_ostream::YELLOW, false };
-  // Source locations
-  static const TerminalColor LocationColor = { raw_ostream::YELLOW, false };
-
-  // lvalue/xvalue
-  static const TerminalColor ValueKindColor = { raw_ostream::CYAN, false };
-  // bitfield/objcproperty/objcsubscript/vectorcomponent
-  static const TerminalColor ObjectKindColor = { raw_ostream::CYAN, false };
-
-  // Null statements
-  static const TerminalColor NullColor = { raw_ostream::BLUE, false };
-
-  // Undeserialized entities
-  static const TerminalColor UndeserializedColor = { raw_ostream::GREEN, true };
-
-  // CastKind from CastExpr's
-  static const TerminalColor CastColor = { raw_ostream::RED, false };
-
-  // Value of the statement
-  static const TerminalColor ValueColor = { raw_ostream::CYAN, true };
-  // Decl names
-  static const TerminalColor DeclNameColor = { raw_ostream::CYAN, true };
-
-  // Indents ( `, -. | )
-  static const TerminalColor IndentColor = { raw_ostream::BLUE, false };
-
-  class ColorScope {
-    raw_ostream &OS;
-    const bool ShowColors;
-
-  public:
-    ColorScope(raw_ostream &OS, bool ShowColors, TerminalColor Color)
-        : OS(OS), ShowColors(ShowColors) {
-      if (ShowColors)
-        OS.changeColor(Color.Color, Color.Bold);
-    }
-    ~ColorScope() {
-      if (ShowColors)
-        OS.resetColor();
-    }
-  };
 
   class ASTDumper
       : public ConstDeclVisitor<ASTDumper>,
@@ -114,6 +43,8 @@ namespace  {
         public ConstCommentVisitor<ASTDumper, void, const FullComment *>,
         public TypeVisitor<ASTDumper> {
 
+    TextTreeStructure TreeStructure;
+
     raw_ostream &OS;
     const CommandTraits *Traits;
     const SourceManager *SM;
@@ -121,22 +52,10 @@ namespace  {
     /// The policy to use for printing; can be defaulted.
     PrintingPolicy PrintPolicy;
 
-    /// Pending[i] is an action to dump an entity at level i.
-    llvm::SmallVector<std::function<void(bool isLastChild)>, 32> Pending;
-
     /// Indicates whether we should trigger deserialization of nodes that had
     /// not already been loaded.
     bool Deserialize = false;
 
-    /// Indicates whether we're at the top level.
-    bool TopLevel = true;
-
-    /// Indicates if we're handling the first child after entering a new depth.
-    bool FirstChild = true;
-
-    /// Prefix for currently-being-dumped entity.
-    std::string Prefix;
-
     /// Keep track of the last location we print out so that we can
     /// print out deltas from then on out.
     const char *LastLocFilename = "";
@@ -146,65 +65,7 @@ namespace  {
 
     /// Dump a child of the current node.
     template<typename Fn> void dumpChild(Fn doDumpChild) {
-      // If we're at the top level, there's nothing interesting to do; just
-      // run the dumper.
-      if (TopLevel) {
-        TopLevel = false;
-        doDumpChild();
-        while (!Pending.empty()) {
-          Pending.back()(true);
-          Pending.pop_back();
-        }
-        Prefix.clear();
-        OS << "\n";
-        TopLevel = true;
-        return;
-      }
-
-      auto dumpWithIndent = [this, doDumpChild](bool isLastChild) {
-        // Print out the appropriate tree structure and work out the prefix for
-        // children of this node. For instance:
-        //
-        //   A        Prefix = ""
-        //   |-B      Prefix = "| "
-        //   | `-C    Prefix = "|   "
-        //   `-D      Prefix = "  "
-        //     |-E    Prefix = "  | "
-        //     `-F    Prefix = "    "
-        //   G        Prefix = ""
-        //
-        // Note that the first level gets no prefix.
-        {
-          OS << '\n';
-          ColorScope Color(OS, ShowColors, IndentColor);
-          OS << Prefix << (isLastChild ? '`' : '|') << '-';
-          this->Prefix.push_back(isLastChild ? ' ' : '|');
-          this->Prefix.push_back(' ');
-        }
-
-        FirstChild = true;
-        unsigned Depth = Pending.size();
-
-        doDumpChild();
-
-        // If any children are left, they're the last at their nesting level.
-        // Dump those ones out now.
-        while (Depth < Pending.size()) {
-          Pending.back()(true);
-          this->Pending.pop_back();
-        }
-
-        // Restore the old prefix.
-        this->Prefix.resize(Prefix.size() - 2);
-      };
-
-      if (FirstChild) {
-        Pending.push_back(std::move(dumpWithIndent));
-      } else {
-        Pending.back()(false);
-        Pending.back() = std::move(dumpWithIndent);
-      }
-      FirstChild = false;
+      TreeStructure.addChild(doDumpChild);
     }
 
   public:
@@ -219,8 +80,8 @@ namespace  {
     ASTDumper(raw_ostream &OS, const CommandTraits *Traits,
               const SourceManager *SM, bool ShowColors,
               const PrintingPolicy &PrintPolicy)
-        : OS(OS), Traits(Traits), SM(SM), PrintPolicy(PrintPolicy),
-          ShowColors(ShowColors) {}
+        : TreeStructure(OS, ShowColors), OS(OS), Traits(Traits), SM(SM),
+          PrintPolicy(PrintPolicy), ShowColors(ShowColors) {}
 
     void setDeserialize(bool D) { Deserialize = D; }