From 77bd054713bc698a67ccc38a0b6fe07ffc161381 Mon Sep 17 00:00:00 2001
From: Marshall Lochbaum <mwlochbaum@gmail.com>
Date: Mon, 30 Aug 2021 15:28:04 -0400
Subject: =?UTF-8?q?Use=20=F0=9D=95=A9=20as=20the=20error=20message=20in=20?=
 =?UTF-8?q?!=F0=9D=95=A9?=
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---
 docs/spec/primitive.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'docs/spec/primitive.html')

diff --git a/docs/spec/primitive.html b/docs/spec/primitive.html
index 128fd24f..f4cf08d9 100644
--- a/docs/spec/primitive.html
+++ b/docs/spec/primitive.html
@@ -66,7 +66,7 @@
 </ul>
 <h2 id="other-provided-functionality"><a class="header" href="#other-provided-functionality">Other provided functionality</a></h2>
 <ul>
-<li><strong>Assert</strong> (<code><span class='Function'>!</span></code>) causes an error if the argument is not <code><span class='Number'>1</span></code>. If <code><span class='Value'>𝕨</span></code> is provided, it gives a message to be associated with this error (which can be any value, not necessarily a string).</li>
+<li><strong>Assert</strong> (<code><span class='Function'>!</span></code>) causes an error if <code><span class='Value'>𝕩</span></code> is not <code><span class='Number'>1</span></code>. The message associated with the error (which is not used by core BQN but might be shown to the user or used by system functions) is <code><span class='Value'>𝕨</span></code> if given and <code><span class='Value'>𝕩</span></code> otherwise. It can be any value, not just a string.</li>
 </ul>
 <ul>
 <li><strong>Catch</strong> (<code><span class='Modifier2'>⎊</span></code>) evaluates <code><span class='Function'>𝔽</span></code> on the arguments <code><span class='Value'>𝕨</span></code> (if present) and <code><span class='Value'>𝕩</span></code>. If <code><span class='Function'>𝔽</span></code> completes without error it returns the result, but if evaluation of <code><span class='Function'>𝔽</span></code> results in an error then the error is suppressed, and Catch evaluates <code><span class='Function'>𝔾</span></code> on the arguments and returns the result. Errors in <code><span class='Function'>𝔾</span></code> are not caught. Catch only prevents evaluation errors, and not syntax errors: these are considered errors in the program as a whole rather than any particular part of it.</li>
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