From bfb982d6824a41ebff1fc5934ebee7f01df1e682 Mon Sep 17 00:00:00 2001
From: dana <dana@dana.is>
Date: Mon, 13 Apr 2026 11:04:58 -0500
Subject: 54318: mathfunc: add isnan() and isinf(). also document NaN + Inf

---
 Test/V03mathfunc.ztst | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'Test')

diff --git a/Test/V03mathfunc.ztst b/Test/V03mathfunc.ztst
index 9a297d69d..8380b5c41 100644
--- a/Test/V03mathfunc.ztst
+++ b/Test/V03mathfunc.ztst
@@ -145,3 +145,11 @@ F:This test fails if your math library doesn't have erand48().
   print -r - "$a, $b, $c"
 0:log2
 >-1.00000, 0.58496, 6.62936
+
+  () {
+    local -F n=nan i1=inf i2=-inf
+    (( isnan(Nan) && isinf(Inf) && isinf(-Inf) )) &&
+    (( isnan(n) && isinf(i1) && isinf(i2) )) &&
+    (( !isnan(Inf) && !isinf(NaN) ))
+  }
+0:isinf, isnan
-- 
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