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DynTypedNode and ASTNodeKind are implemented as part of the clang AST
library, which uses the main clang namespace. There doesn't seem to be a
need for this extra level of namespacing.

I left behind aliases in the ast_type_traits namespace for out of tree
clients of these APIs. To provide aliases for the enumerators, I used
this pattern:
  namespace ast_type_traits {
  constexpr TraversalKind TK_AsIs = ::clang::TK_AsIs;
  }
I think the typedefs will be useful for migration, but we might be able
to drop these enumerator aliases.

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D74499

to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636

Fix build by renaming ChangeKind -> Change

This reverts commit 0c78c5729f29315d7945988efd048c0cb86c07ce.

llvm-svn: 311222

This reverts commit r311200, it was causing widespread build failures.

llvm-svn: 311210

Summary:
This also changes the output order of the changes. Now the matches are
printed in pre-order, intertwined with insertions, updates, and moves.
Deletions are printed afterwards.

Reviewers: arphaman

Subscribers: klimek

Differential Revision: https://reviews.llvm.org/D36179

llvm-svn: 311200

Fix to the computation of the rightmost descendant.

Prevents root nodes from being mapped if they are already mapped.  This
only makes a difference when we compare AST Nodes other than entire
translation units, a feature which still has to be tested.

Reviewers: arphaman

Subscribers: klimek

Differential Revision: https://reviews.llvm.org/D36176

llvm-svn: 311172

llvm-svn: 309737

This is the first commit for the "Clang-based C/C++ diff tool" GSoC project.

ASTDiff is a new library that computes a structural AST diff between two ASTs
using the gumtree algorithm. Clang-diff is a new Clang tool that will show
the structural code changes between different ASTs.

Patch by Johannes Altmanninger!

Differential Revision: https://reviews.llvm.org/D34329

llvm-svn: 308731