vendor/clang/clang-trunk-r366426

1 files changed, 92 insertions, 0 deletions

diff --git a/include/clang/Tooling/Syntax/Nodes.h b/include/clang/Tooling/Syntax/Nodes.h
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index 000000000000..d20c7cb7b171
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+++ b/include/clang/Tooling/Syntax/Nodes.h
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+//===- Nodes.h - syntax nodes for C/C++ grammar constructs ----*- C++ -*-=====//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+// Syntax tree nodes for C, C++ and Objective-C grammar constructs.
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_CLANG_TOOLING_SYNTAX_NODES_H
+#define LLVM_CLANG_TOOLING_SYNTAX_NODES_H
+
+#include "clang/Basic/TokenKinds.h"
+#include "clang/Lex/Token.h"
+#include "clang/Tooling/Syntax/Tokens.h"
+#include "clang/Tooling/Syntax/Tree.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace clang {
+namespace syntax {
+
+/// A kind of a syntax node, used for implementing casts.
+enum class NodeKind : uint16_t {
+  Leaf,
+  TranslationUnit,
+  TopLevelDeclaration,
+  CompoundStatement
+};
+/// For debugging purposes.
+llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, NodeKind K);
+
+/// A relation between a parent and child node. Used for implementing accessors.
+enum class NodeRole : uint8_t {
+  // A node without a parent.
+  Detached,
+  // Children of an unknown semantic nature, e.g. skipped tokens, comments.
+  Unknown,
+  // FIXME: should this be shared for all other nodes with braces, e.g. init
+  //        lists?
+  CompoundStatement_lbrace,
+  CompoundStatement_rbrace
+};
+
+/// A root node for a translation unit. Parent is always null.
+class TranslationUnit final : public Tree {
+public:
+  TranslationUnit() : Tree(NodeKind::TranslationUnit) {}
+  static bool classof(const Node *N) {
+    return N->kind() == NodeKind::TranslationUnit;
+  }
+};
+
+/// FIXME: this node is temporary and will be replaced with nodes for various
+///        'declarations' and 'declarators' from the C/C++ grammar
+///
+/// Represents any top-level declaration. Only there to give the syntax tree a
+/// bit of structure until we implement syntax nodes for declarations and
+/// declarators.
+class TopLevelDeclaration final : public Tree {
+public:
+  TopLevelDeclaration() : Tree(NodeKind::TopLevelDeclaration) {}
+  static bool classof(const Node *N) {
+    return N->kind() == NodeKind::TopLevelDeclaration;
+  }
+};
+
+/// An abstract node for C++ statements, e.g. 'while', 'if', etc.
+class Statement : public Tree {
+public:
+  Statement(NodeKind K) : Tree(K) {}
+  static bool classof(const Node *N) {
+    return NodeKind::CompoundStatement <= N->kind() &&
+           N->kind() <= NodeKind::CompoundStatement;
+  }
+};
+
+/// { statement1; statement2; … }
+class CompoundStatement final : public Statement {
+public:
+  CompoundStatement() : Statement(NodeKind::CompoundStatement) {}
+  static bool classof(const Node *N) {
+    return N->kind() == NodeKind::CompoundStatement;
+  }
+  syntax::Leaf *lbrace();
+  syntax::Leaf *rbrace();
+};
+
+} // namespace syntax
+} // namespace clang
+#endif