schemars compatibility

Cargo.toml

@@ -13,11 +13,13 @@ keywords = ["currency", "iso", "iso-4217", "iso4217"]
 
 [features]
 default = []
-with-serde = ["serde"]
-iterator = ["strum"]
+with-serde = ["dep:serde"]
+iterator = ["dep:strum"]
+with-schemars = ["dep:schemars", "with-serde"]
 
 [dependencies]
 iso_country = "0.1.4"
+schemars = { version = "0.8.16", optional = true }
 serde = { version = "1.0.127", optional = true, features = ["derive"] }
 strum = {version = "0.26.1", optional = true, features = ["derive"] }
 

README.md

@@ -19,6 +19,7 @@ The crate has only two optional features:
 
 - `with-serde`
 - `iterator`
+- `with-schemars`
 
 ### with-serde
 
@@ -35,6 +36,12 @@ use iso_currency::IntoEnumIterator;
 let mut iter = Currency::iter();
 ```
 
+### with-schemars
+
+If you need to generate a JSON schema for your project, you can use the `with-schemars` feature. This will derive [`schemars's`](https://crates.io/crates/schemars) `JsonSchema` trait on `Currency`.
+
+**NOTE**: This feature enables `with-serde` as well.
+
 ## Examples
 
 ```rust

build.rs

@@ -77,6 +77,7 @@ fn write_enum(file: &mut BufWriter<File>, data: &[IsoData]) {
     let outline = quote! {
         #[cfg_attr(feature = "with-serde", derive(Serialize, Deserialize))]
         #[cfg_attr(feature = "iterator", derive(EnumIter))]
+        #[cfg_attr(feature = "with-schemars", derive(JsonSchema))]
         #[derive(Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
         pub enum Currency {
             #body

src/lib.rs

@@ -33,6 +33,8 @@ pub use iso_country::Country;
 #[cfg_attr(docsrs, doc(cfg(feature = "with-serde")))]
 use serde::{Deserialize, Serialize};
 
+#[cfg(feature = "with-schemars")]
+use schemars::JsonSchema;
 #[cfg(feature = "iterator")]
 #[cfg_attr(docsrs, doc(cfg(feature = "iterator")))]
 use strum::EnumIter;