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//===--- ASTSelection.h - Clang refactoring library -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLING_REFACTOR_AST_SELECTION_H
#define LLVM_CLANG_TOOLING_REFACTOR_AST_SELECTION_H
#include "clang/AST/ASTTypeTraits.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/SourceLocation.h"
#include <vector>
namespace clang {
class ASTContext;
namespace tooling {
enum class SourceSelectionKind {
/// A node that's not selected.
None,
/// A node that's considered to be selected because the whole selection range
/// is inside of its source range.
ContainsSelection,
/// A node that's considered to be selected because the start of the selection
/// range is inside its source range.
ContainsSelectionStart,
/// A node that's considered to be selected because the end of the selection
/// range is inside its source range.
ContainsSelectionEnd,
/// A node that's considered to be selected because the node is entirely in
/// the selection range.
InsideSelection,
};
/// Represents a selected AST node.
///
/// AST selection is represented using a tree of \c SelectedASTNode. The tree
/// follows the top-down shape of the actual AST. Each selected node has
/// a selection kind. The kind might be none as the node itself might not
/// actually be selected, e.g. a statement in macro whose child is in a macro
/// argument.
struct SelectedASTNode {
ast_type_traits::DynTypedNode Node;
SourceSelectionKind SelectionKind;
std::vector<SelectedASTNode> Children;
SelectedASTNode(const ast_type_traits::DynTypedNode &Node,
SourceSelectionKind SelectionKind)
: Node(Node), SelectionKind(SelectionKind) {}
SelectedASTNode(SelectedASTNode &&) = default;
SelectedASTNode &operator=(SelectedASTNode &&) = default;
void dump(llvm::raw_ostream &OS = llvm::errs()) const;
};
/// Traverses the given ASTContext and creates a tree of selected AST nodes.
///
/// \returns None if no nodes are selected in the AST, or a selected AST node
/// that corresponds to the TranslationUnitDecl otherwise.
Optional<SelectedASTNode> findSelectedASTNodes(const ASTContext &Context,
SourceRange SelectionRange);
} // end namespace tooling
} // end namespace clang
#endif // LLVM_CLANG_TOOLING_REFACTOR_AST_SELECTION_H
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