From c212ef1a70b69cf83c57f1bd09829d327a769667 Mon Sep 17 00:00:00 2001
From: Jisan Halder <official.jisanhalder@gmail.com>
Date: Sun, 18 Oct 2026 22:24:23 +0530
Subject: [PATCH] Allow fast-math builds by conditionally avoiding
 std::numeric_limits<T>::infinity() (fixes #397)

Authored and verified with ByteAsk (https://byteask.com).
---
 include/fast_float/parse_number.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/fast_float/parse_number.h b/include/fast_float/parse_number.h
index d12a442..cb4b94a 100644
--- a/include/fast_float/parse_number.h
+++ b/include/fast_float/parse_number.h
@@ -61,8 +61,13 @@ from_chars_result_t<UC>
       } else {
         answer.ptr = first + 3;
       }
+#if defined(__FAST_MATH__) || defined(FASTFLOAT_FAST_MATH)
+      value = minusSign ? -std::numeric_limits<T>::max()
+                        : std::numeric_limits<T>::max();
+#else
       value = minusSign ? -std::numeric_limits<T>::infinity()
                         : std::numeric_limits<T>::infinity();
+#endif
       return answer;
     }
   }