[clang-diff] Move the JSON export function to clang-diff

Reviewers: arphaman

Subscribers: klimek

Differential Revision: https://reviews.llvm.org/D36178

llvm-svn: 311199

1 files changed, 28 insertions, 26 deletions

diff --git a/clang/lib/Tooling/ASTDiff/ASTDiff.cpp b/clang/lib/Tooling/ASTDiff/ASTDiff.cpp
index 3c8d0024dd6..0441dbc78da 100644
--- a/clang/lib/Tooling/ASTDiff/ASTDiff.cpp
+++ b/clang/lib/Tooling/ASTDiff/ASTDiff.cpp
@@ -176,9 +176,6 @@ public:
   void printTree(NodeId Root) const;
   void printTree(raw_ostream &OS, NodeId Root) const;
 
-  void printAsJsonImpl(raw_ostream &OS) const;
-  void printNodeAsJson(raw_ostream &OS, NodeId Id) const;
-
 private:
   /// Nodes in preorder.
   std::vector<Node> Nodes;
@@ -438,28 +435,6 @@ void SyntaxTree::Impl::printNode(raw_ostream &OS, NodeId Id) const {
   OS << "(" << PostorderIds[Id] << ")";
 }
 
-void SyntaxTree::Impl::printNodeAsJson(raw_ostream &OS, NodeId Id) const {
-  auto N = getNode(Id);
-  OS << R"({"type":")" << N.getTypeLabel() << R"(")";
-  if (getNodeValue(Id) != "")
-    OS << R"(,"value":")" << getNodeValue(Id) << R"(")";
-  OS << R"(,"children":[)";
-  if (N.Children.size() > 0) {
-    printNodeAsJson(OS, N.Children[0]);
-    for (size_t I = 1, E = N.Children.size(); I < E; ++I) {
-      OS << ",";
-      printNodeAsJson(OS, N.Children[I]);
-    }
-  }
-  OS << "]}";
-}
-
-void SyntaxTree::Impl::printAsJsonImpl(raw_ostream &OS) const {
-  OS << R"({"root":)";
-  printNodeAsJson(OS, getRootId());
-  OS << "}\n";
-}
-
 /// Identifies a node in a subtree by its postorder offset, starting at 1.
 struct SNodeId {
   int Id = 0;
@@ -674,6 +649,12 @@ private:
   }
 };
 
+ast_type_traits::ASTNodeKind Node::getType() const {
+  return ASTNode.getNodeKind();
+}
+
+StringRef Node::getTypeLabel() const { return getType().asStringRef(); }
+
 namespace {
 // Compares nodes by their depth.
 struct HeightLess {
@@ -999,7 +980,28 @@ void ASTDiff::printMatch(raw_ostream &OS, const Match &M) const {
 
 SyntaxTree::~SyntaxTree() = default;
 
-void SyntaxTree::printAsJson(raw_ostream &OS) { TreeImpl->printAsJsonImpl(OS); }
+const ASTContext &SyntaxTree::getASTContext() const { return TreeImpl->AST; }
+
+const Node &SyntaxTree::getNode(NodeId Id) const {
+  return TreeImpl->getNode(Id);
+}
+
+NodeId SyntaxTree::getRootId() const { return TreeImpl->getRootId(); }
+
+std::pair<unsigned, unsigned> SyntaxTree::getSourceRangeOffsets(const Node &N) const {
+  const SourceManager &SrcMgr = TreeImpl->AST.getSourceManager();
+  SourceRange Range = N.ASTNode.getSourceRange();
+  SourceLocation BeginLoc = Range.getBegin();
+  SourceLocation EndLoc = Lexer::getLocForEndOfToken(
+      Range.getEnd(), /*Offset=*/0, SrcMgr, TreeImpl->AST.getLangOpts());
+  if (auto *ThisExpr = N.ASTNode.get<CXXThisExpr>()) {
+    if (ThisExpr->isImplicit())
+      EndLoc = BeginLoc;
+  }
+  unsigned Begin = SrcMgr.getFileOffset(SrcMgr.getExpansionLoc(BeginLoc));
+  unsigned End = SrcMgr.getFileOffset(SrcMgr.getExpansionLoc(EndLoc));
+  return {Begin, End};
+}
 
 std::string SyntaxTree::getNodeValue(const DynTypedNode &DTN) const {
   return TreeImpl->getNodeValue(DTN);