[clangd] Implementation of textDocument/documentSymbol

Summary:
An AST-based approach is used to retrieve the document symbols rather than an
in-memory index query. The index is not an ideal fit to achieve this because of
the file-centric query being done here whereas the index is suited for
project-wide queries. Document symbols also includes more symbols and need to
keep the order as seen in the file.

Signed-off-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>

Subscribers: tomgr, ilya-biryukov, ioeric, MaskRay, jkorous, cfe-commits

Differential Revision: https://reviews.llvm.org/D47846

llvm-svn: 336386

1 files changed, 6 insertions, 0 deletions

diff --git a/clang-tools-extra/clangd/Protocol.h b/clang-tools-extra/clangd/Protocol.h
index bbafdf171fc..999b8432b76 100644
--- a/clang-tools-extra/clangd/Protocol.h
+++ b/clang-tools-extra/clangd/Protocol.h
@@ -479,6 +479,12 @@ struct DocumentFormattingParams {
 };
 bool fromJSON(const json::Expr &, DocumentFormattingParams &);
 
+struct DocumentSymbolParams {
+  // The text document to find symbols in.
+  TextDocumentIdentifier textDocument;
+};
+bool fromJSON(const json::Expr &, DocumentSymbolParams &);
+
 struct Diagnostic {
   /// The range at which the message applies.
   Range range;