From 4f6aba105fb5b9670199594183185521f8ffe350 Mon Sep 17 00:00:00 2001
From: Adam Reichold <adam.reichold@t-online.de>
Date: Tue, 14 Sep 2021 21:26:55 +0200
Subject: [PATCH] Explain how to manually enable Serde support for num-rational
 and num-bigint.

---
 README.md  | 9 +++++++++
 src/lib.rs | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/README.md b/README.md
index 00380de3..0b924596 100644
--- a/README.md
+++ b/README.md
@@ -110,6 +110,15 @@ uom = {
  * `use_serde` -- Feature to enable support for serialization and deserialization of quantities
    with the [Serde][serde] crate. Disabled by default.
 
+   [Serde][serde] support for the `big*` and `rational*` underlying storage types requires manually
+   enabling the `serde` feature for the `num-rational` and `num-bigint` crates. To do so, you can
+   add one or both of the following lines to your `Cargo.toml`:
+
+   ```toml
+   num-rational = { version = "*", features = ["serde"] }
+   num-bigint = { version = "*", features = ["serde"] }
+   ```
+
 [si]: https://jcgm.bipm.org/vim/en/1.16.html
 [serde]: https://serde.rs/
 
diff --git a/src/lib.rs b/src/lib.rs
index 994f2d6b..be430b4a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -98,6 +98,15 @@
 //!  * `use_serde` -- Feature to enable support for serialization and deserialization of quantities
 //!    with the [Serde][serde] crate. Disabled by default.
 //!
+//!    [Serde][serde] support for the `big*` and `rational*` underlying storage types requires
+//!    manually enabling the `serde` feature for the `num-rational` and `num-bigint` crates. To do
+//!    so, you can add one or both of the following lines to your `Cargo.toml`:
+//!
+//!    ```toml
+//!    num-rational = { version = "*", features = ["serde"] }
+//!    num-bigint = { version = "*", features = ["serde"] }
+//!    ```
+//!
 //! [si]: https://jcgm.bipm.org/vim/en/1.16.html
 //! [serde]: https://serde.rs/
 //!