clang-tools-extra/clangd/support/Context.cpp

   1 //===--- Context.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
   9 #include "support/Context.h"
  10 #include <cassert>
  11
  12 namespace clang {
  13 namespace clangd {
  14
  15 Context Context::empty() { return Context(/*DataPtr=*/nullptr); }
  16
  17 Context::Context(std::shared_ptr<const Data> DataPtr)
  18     : DataPtr(std::move(DataPtr)) {}
  19
  20 Context Context::clone() const { return Context(DataPtr); }
  21
  22 static Context &currentContext() {
  23   static thread_local auto C = Context::empty();
  24   return C;
  25 }
  26
  27 const Context &Context::current() { return currentContext(); }
  28
  29 Context Context::swapCurrent(Context Replacement) {
  30   std::swap(Replacement, currentContext());
  31   return Replacement;
  32 }
  33
  34 } // namespace clangd
  35 } // namespace clang