Added TryConvert for NonZero types

src/try_convert.rs

@@ -1,5 +1,6 @@
 //! Traits for converting from Ruby [`Value`]s to Rust types.
 
+use std::num::NonZero;
 use std::path::PathBuf;
 
 use rb_sys::{rb_get_path, rb_num2dbl};
@@ -134,6 +135,32 @@ impl TryConvert for usize {
 }
 unsafe impl TryConvertOwned for usize {}
 
+macro_rules! impl_non_zero_try_convert {
+    ($type:ty) => {
+        impl TryConvert for NonZero<$type> {
+            #[inline]
+            fn try_convert(val: Value) -> Result<Self, Error> {
+                NonZero::<$type>::new(<$type>::try_convert(val)?).ok_or(Error::new(
+                    Ruby::get_with(val).exception_arg_error(),
+                    "value must be non-zero",
+                ))
+            }
+        }
+        unsafe impl TryConvertOwned for NonZero<$type> {}
+    };
+}
+
+impl_non_zero_try_convert!(i8);
+impl_non_zero_try_convert!(i16);
+impl_non_zero_try_convert!(i32);
+impl_non_zero_try_convert!(i64);
+impl_non_zero_try_convert!(isize);
+impl_non_zero_try_convert!(u8);
+impl_non_zero_try_convert!(u16);
+impl_non_zero_try_convert!(u32);
+impl_non_zero_try_convert!(u64);
+impl_non_zero_try_convert!(usize);
+
 impl TryConvert for f32 {
     #[inline]
     fn try_convert(val: Value) -> Result<Self, Error> {