[clangd] Implement "prepareRename"

Summary:
- "prepareRename" request is added in LSP v3.12.0
- also update the vscode-client dependency to pick-up the rename bug fix[1]

[1]: https://github.com/microsoft/vscode-languageserver-node/issues/447

Reviewers: sammccall

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D63126

llvm-svn: 366873

1 files changed, 4 insertions, 0 deletions

diff --git a/clang-tools-extra/clangd/Protocol.cpp b/clang-tools-extra/clangd/Protocol.cpp
index 600896b1eee..0c44928d224 100644
--- a/clang-tools-extra/clangd/Protocol.cpp
+++ b/clang-tools-extra/clangd/Protocol.cpp
@@ -331,6 +331,10 @@ bool fromJSON(const llvm::json::Value &Params, ClientCapabilities &R) {
         }
       }
     }
+    if (auto *Rename = TextDocument->getObject("rename")) {
+      if (auto RenameSupport = Rename->getBoolean("prepareSupport"))
+        R.RenamePrepareSupport = *RenameSupport;
+    }
   }
   if (auto *Workspace = O->getObject("workspace")) {
     if (auto *Symbol = Workspace->getObject("symbol")) {