From 3fd12f81c2b7afc028d7641709b610d9cbcb6e18 Mon Sep 17 00:00:00 2001
From: Michael Hordijk <hordijk@aurora.tech>
Date: Wed, 1 Jan 2025 15:04:31 -0500
Subject: [PATCH] Remove ad hoc constant from unit slot example (#371)

When demonstrating that we can pass `Constant` to a unit slot, use the
available builtin constant for the speed of light rather than creating
an ad hoc constant.
---
 docs/discussion/idioms/unit-slots.md | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/docs/discussion/idioms/unit-slots.md b/docs/discussion/idioms/unit-slots.md
index e37c122a..b24f905d 100644
--- a/docs/discussion/idioms/unit-slots.md
+++ b/docs/discussion/idioms/unit-slots.md
@@ -67,11 +67,8 @@ those too!  Key examples include [unit symbols](../../reference/unit.md#symbols)
     Suppose we have the following preamble, simply to set everything up.
 
     ```cpp
-    struct SpeedOfLight : decltype(Meters{} / Seconds{} * mag<299'792'458>()) {
-        static constexpr const char label[] = "c";
-    };
-    constexpr const char SpeedOfLight::label[];
-    constexpr auto c = make_constant(SpeedOfLight{});
+    // Found in `"au/constants/speed_of_light.hh"`:
+    constexpr auto c = SPEED_OF_LIGHT;
 
     // These using declarations should be in a `.cc` file, not `.hh`,
     // to avoid namespace pollution!