From 03cc18678ed2ed8b2424ec99dee7e4655d876db5 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 25 May 2023 09:37:28 -0400
Subject: [PATCH] optional: Fix compilation on XLClang 16.1.0

The compiler rejects initialization with `= {}`:

    error: chosen constructor is explicit in copy-initialization

Use just `{}` instead.
---
 include/dap/optional.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/dap/optional.h b/include/dap/optional.h
index 7e1d283..9a3d216 100644
--- a/include/dap/optional.h
+++ b/include/dap/optional.h
@@ -75,7 +75,7 @@ class optional {
   inline T& operator*();
 
  private:
-  T val = {};
+  T val{};
   bool set = false;
 };