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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
|