From ca58cbb3f3667e872d8ae2ee1a8c4a1192ef4509 Mon Sep 17 00:00:00 2001
From: Techatrix <19954306+Techatrix@users.noreply.github.com>
Date: Sun, 25 Sep 2022 01:01:31 +0200
Subject: [PATCH] make types.Diagnostic correctly parseable

---
 src/Server.zig | 6 +++---
 src/types.zig  | 8 ++++----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/Server.zig b/src/Server.zig
index 1221f6c..05fe650 100644
--- a/src/Server.zig
+++ b/src/Server.zig
@@ -335,10 +335,10 @@ fn getAstCheckDiagnostics(
         } else if (std.mem.startsWith(u8, msg, "note: ")) {
             var latestDiag = &diagnostics.items[diagnostics.items.len - 1];
 
-            var fresh = if (latestDiag.relatedInformation.len == 0)
-                try server.arena.allocator().alloc(types.DiagnosticRelatedInformation, 1)
+            var fresh = if (latestDiag.relatedInformation) |related_information|
+                try server.arena.allocator().realloc(@ptrCast([]types.DiagnosticRelatedInformation, related_information), related_information.len + 1)
             else
-                try server.arena.allocator().realloc(@ptrCast([]types.DiagnosticRelatedInformation, latestDiag.relatedInformation), latestDiag.relatedInformation.len + 1);
+                try server.arena.allocator().alloc(types.DiagnosticRelatedInformation, 1);
 
             const location = types.Location{
                 .uri = handle.uri(),
diff --git a/src/types.zig b/src/types.zig
index 2bee392..1ce356a 100644
--- a/src/types.zig
+++ b/src/types.zig
@@ -117,11 +117,11 @@ pub const DiagnosticRelatedInformation = struct {
 
 pub const Diagnostic = struct {
     range: Range,
-    severity: DiagnosticSeverity,
-    code: string,
-    source: string,
+    severity: ?DiagnosticSeverity,
+    code: ?string,
+    source: ?string,
     message: string,
-    relatedInformation: []const DiagnosticRelatedInformation = &.{},
+    relatedInformation: ?[]const DiagnosticRelatedInformation = null,
 };
 
 pub const TextDocument = struct {