Implement Error for wasi::io::error::Error (#86)

Author: lann

src/errors.rs

@@ -0,0 +1,8 @@
+impl core::fmt::Display for crate::io::error::Error {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        f.write_str(&self.to_debug_string())
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for crate::io::error::Error {}

src/lib.rs

@@ -179,6 +179,8 @@
 #[cfg(feature = "std")]
 extern crate std;
 
+mod errors;
+
 // These modules are all auto-generated by `./ci/regenerate.sh`
 mod bindings;
 #[allow(unused_imports)]