[clangd] Use identifiers in file as completion candidates when build is not ready.

Summary:
o Lex the code to get the identifiers and put them into a "symbol" index.
o Adds a new completion mode without compilation/sema into code completion workflow.
o Make IncludeInserter work even when no compile command is present, by avoiding
inserting non-verbatim headers.

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, kadircet, jdoerfert, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D60126

llvm-svn: 358159

1 files changed, 1 insertions, 1 deletions

diff --git a/clang-tools-extra/clangd/ClangdUnit.cpp b/clang-tools-extra/clangd/ClangdUnit.cpp
index 7c611877595..473edb6ff2f 100644
--- a/clang-tools-extra/clangd/ClangdUnit.cpp
+++ b/clang-tools-extra/clangd/ClangdUnit.cpp
@@ -311,7 +311,7 @@ ParsedAST::build(std::unique_ptr<CompilerInvocation> CI,
     auto Style = getFormatStyleForFile(MainInput.getFile(), Content, VFS.get());
     auto Inserter = std::make_shared<IncludeInserter>(
         MainInput.getFile(), Content, Style, BuildDir.get(),
-        Clang->getPreprocessor().getHeaderSearchInfo());
+        &Clang->getPreprocessor().getHeaderSearchInfo());
     if (Preamble) {
       for (const auto &Inc : Preamble->Includes.MainFileIncludes)
         Inserter->addExisting(Inc);