More lsp support

This makes the LSP support complete for now:

- Completion
- Diagnostics
- Goto implementation/declaration
- Rename
- Documentation
- Find references

1 files changed, 54 insertions, 0 deletions

diff --git a/test/json/diag.json b/test/json/diag.json
new file mode 100644
index 0000000..4384ea3
--- /dev/null
+++ b/test/json/diag.json
@@ -0,0 +1,54 @@
+{
+  "jsonrpc": "2.0",
+  "method": "textDocument/publishDiagnostics",
+  "params": {
+    "diagnostics": [
+      {
+        "code": "unused-includes",
+        "codeDescription": {
+          "href": "https://clangd.llvm.org/guides/include-cleaner"
+        },
+        "message": "Included header errno.h is not used directly (fixes available)",
+        "range": {
+          "end": {
+            "character": 18,
+            "line": 4
+          },
+          "start": {
+            "character": 0,
+            "line": 4
+          }
+        },
+        "severity": 2,
+        "source": "clangd",
+        "tags": [
+          1
+        ]
+      },
+      {
+        "code": "unused-includes",
+        "codeDescription": {
+          "href": "https://clangd.llvm.org/guides/include-cleaner"
+        },
+        "message": "Included header hash.h is not used directly (fixes available)",
+        "range": {
+          "end": {
+            "character": 17,
+            "line": 16
+          },
+          "start": {
+            "character": 0,
+            "line": 16
+          }
+        },
+        "severity": 2,
+        "source": "clangd",
+        "tags": [
+          1
+        ]
+      }
+    ],
+    "uri": "file:///home/abbe/code/dged/src/dged/syntax.c",
+    "version": 0
+  }
+}