From ae26201e7e8b1951195c456cbb882f58e4caefff Mon Sep 17 00:00:00 2001
From: Trevor Spiteri <tspiteri@ieee.org>
Date: Fri, 5 Feb 2021 19:08:40 +0100
Subject: [PATCH] match standard library float parsing of "-NaN"

---
 src/lib.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/lib.rs b/src/lib.rs
index 0beed61f..482aec5f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -236,6 +236,7 @@ macro_rules! float_trait_impl {
                     "inf"   => return Ok(core::$t::INFINITY),
                     "-inf"  => return Ok(core::$t::NEG_INFINITY),
                     "NaN"   => return Ok(core::$t::NAN),
+                    "-NaN"   => return Ok(-core::$t::NAN),
                     _       => {},
                 }