additional stream tools

Signed-off-by: Jason Volk <jason@zemos.net>

src/core/result/into_is_ok.rs

@@ -0,0 +1,10 @@
+use super::Result;
+
+pub trait IntoIsOk<T, E> {
+	fn into_is_ok(self) -> bool;
+}
+
+impl<T, E> IntoIsOk<T, E> for Result<T, E> {
+	#[inline]
+	fn into_is_ok(self) -> bool { self.is_ok() }
+}