Support converting arrays of integers to Rect via TryFrom

Author: lolbinarycat

src/sdl2/rect.rs

@@ -1,13 +1,14 @@
 //! Rectangles and points.
 
 use crate::sys;
-use std::convert::{AsMut, AsRef};
+use std::convert::{AsMut, AsRef, TryFrom, TryInto};
 use std::hash::{Hash, Hasher};
 use std::mem;
 use std::ops::{
     Add, AddAssign, BitAnd, BitOr, Deref, DerefMut, Div, DivAssign, Mul, MulAssign, Neg, Sub,
     SubAssign,
 };
+use std::num::TryFromIntError;
 use std::ptr;
 
 /// The maximal integer value that can be used for rectangles.
@@ -698,6 +699,29 @@ impl From<(i32, i32, u32, u32)> for Rect {
     }
 }
 
+/// Try to convert an array of numbers to a rectangle
+///
+/// Example:
+/// ```rust
+/// use sdl2::rect::Rect;
+/// let rect1: Rect = [5_u8; 4].into().unwrap();
+/// let rect2: Rect = [5_u64; 4].into().unwrap();
+///
+/// assert_eq!(rect1, rect2);
+/// ```
+impl<T> TryFrom<[T; 4]> for Rect where
+	T: TryInto<u32> + TryInto<i32>,
+	// need to do this to support Infallible conversions
+	TryFromIntError: From<<T as TryInto<i32>>::Error>,
+	TryFromIntError: From<<T as TryInto<u32>>::Error>,
+{
+	type Error = TryFromIntError;
+	fn try_from([x, y, width, height]: [T; 4]) -> Result<Self, TryFromIntError> {
+		Ok(Rect::new(x.try_into()?, y.try_into()?,
+					 width.try_into()?, height.try_into()?))
+	}
+}
+
 impl AsRef<sys::SDL_Rect> for Rect {
     fn as_ref(&self) -> &sys::SDL_Rect {
         &self.raw