1 //===- Synthesis.cpp ------------------------------------------*- C++ -*-=====//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 #include "clang/Tooling/Syntax/BuildTree.h"
9 
10 using namespace clang;
11 
12 /// Exposes private syntax tree APIs required to implement node synthesis.
13 /// Should not be used for anything else.
14 class syntax::FactoryImpl {
15 public:
16   static void prependChildLowLevel(syntax::Tree *T, syntax::Node *Child,
17                                    syntax::NodeRole R) {
18     T->prependChildLowLevel(Child, R);
19   }
20 };
21 
22 clang::syntax::Leaf *syntax::createPunctuation(clang::syntax::Arena &A,
23                                                clang::tok::TokenKind K) {
24   auto Tokens = A.lexBuffer(llvm::MemoryBuffer::getMemBuffer(
25                                 clang::tok::getPunctuatorSpelling(K)))
26                     .second;
27   assert(Tokens.size() == 1);
28   assert(Tokens.front().kind() == K);
29   return new (A.allocator()) clang::syntax::Leaf(Tokens.begin());
30 }
31 
32 clang::syntax::EmptyStatement *
33 syntax::createEmptyStatement(clang::syntax::Arena &A) {
34   auto *S = new (A.allocator()) clang::syntax::EmptyStatement;
35   FactoryImpl::prependChildLowLevel(S, createPunctuation(A, clang::tok::semi),
36                                     NodeRole::Unknown);
37   return S;
38 }
39