From a6e8fb10e95a9db690221584bb6cbf74562fe185 Mon Sep 17 00:00:00 2001
From: "Tobin C. Harding" <me@tobin.cc>
Date: Sat, 6 Jul 2024 14:25:57 +1000
Subject: [PATCH] Use token tree in const_asset

Instead of our current `const_assert` we can use a macro token tree and
call through to `assert`. Doing so makes the macro more general.
---
 internals/src/macros.rs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/internals/src/macros.rs b/internals/src/macros.rs
index 6b9aa6aaf7..be894d1b89 100644
--- a/internals/src/macros.rs
+++ b/internals/src/macros.rs
@@ -137,11 +137,12 @@ macro_rules! debug_from_display {
 }
 
 /// Asserts a boolean expression at compile time.
+// Copied from: https://internals.rust-lang.org/t/nicer-static-assertions/15986
 #[macro_export]
 macro_rules! const_assert {
-    ($x:expr) => {{
-        const _: [(); 0 - !$x as usize] = [];
-    }};
+    ($($tt:tt)*) => {
+        const _: () = assert!($($tt)*);
+    }
 }
 
 /// Derives `From<core::convert::Infallible>` for the given type.