From aa47752f5b77a16cea2e06dc59971fce130dec95 Mon Sep 17 00:00:00 2001
From: nullptrdevs <16590917+nullptrdevs@users.noreply.github.com>
Date: Sat, 30 Sep 2023 23:09:21 -0700
Subject: [PATCH] Generate folding ranges for empty container types (#1474)

---
 src/features/folding_range.zig       | 5 +++++
 tests/lsp_features/folding_range.zig | 9 +++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/features/folding_range.zig b/src/features/folding_range.zig
index 68a14b459..a28ebb6f8 100644
--- a/src/features/folding_range.zig
+++ b/src/features/folding_range.zig
@@ -244,6 +244,11 @@ pub fn generateFoldingRanges(allocator: std.mem.Allocator, tree: Ast, encoding:
                     }
                     const end_tok = ast.lastToken(tree, node);
                     try builder.add(null, start_tok, end_tok, .exclusive, .exclusive);
+                } else { // no members (yet), ie `const T = type {};`
+                    var start_tok = tree.firstToken(node);
+                    while(token_tags[start_tok] != .l_brace) start_tok += 1;
+                    const end_tok = ast.lastToken(tree, node);
+                    try builder.add(null, start_tok, end_tok, .exclusive, .exclusive);
                 }
             },
 
diff --git a/tests/lsp_features/folding_range.zig b/tests/lsp_features/folding_range.zig
index 30bda21fd..bc724512c 100644
--- a/tests/lsp_features/folding_range.zig
+++ b/tests/lsp_features/folding_range.zig
@@ -12,6 +12,15 @@ test "foldingRange - empty" {
     try testFoldingRange("", &.{});
 }
 
+test "foldingRange - container type without members" {
+    try testFoldingRange(
+        \\const S = struct {
+        \\};
+    , &.{
+        .{ .startLine = 0, .startCharacter = 18, .endLine = 1, .endCharacter = 0 },
+    });
+}
+
 test "foldingRange - doc comment" {
     try testFoldingRange(
         \\/// hello