From cba388b1dcdbb9696fcf07b5246ebad09979aea7 Mon Sep 17 00:00:00 2001
From: Daniel Lemire <daniel@lemire.me>
Date: Mon, 26 Aug 2024 10:47:39 -0400
Subject: [PATCH] Update README.md

---
 README.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/README.md b/README.md
index 0d0f0d3..b4df3ba 100644
--- a/README.md
+++ b/README.md
@@ -180,6 +180,15 @@ Hence, we have the following examples:
   // result == std::numeric_limits<double>::infinity()
 ```
 
+Users who wish for the value to be left unmodified given `std::errc::result_out_of_range` may do so by adding two lines of code:
+
+```cpp
+  double old_result = result; // make copy
+  auto r = fast_float::from_chars(start, end, result);
+  if(r.ec == std::errc::result_out_of_range) { result = old_result; }
+```
+
+
 ## C++20: compile-time evaluation (constexpr)
 
 In C++20, you may use `fast_float::from_chars` to parse strings