From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 12 Oct 2020 00:15:49 +0000 (+0100)
Subject: require Copy
X-Git-Tag: otter-0.2.0~664
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=25abad0675de9f3e85e6abad3706e7c6ee2f1cd4;p=otter.git

require Copy

Avoids us impl'd for nontrivial types

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/wasm/wasm.rs b/wasm/wasm.rs
index 7bea8ecf..650cbf6d 100644
--- a/wasm/wasm.rs
+++ b/wasm/wasm.rs
@@ -15,7 +15,7 @@ trait WasmError {
   fn e(self) -> JsValue;
 }
 
-impl<E> WasmError for E where E: Display {
+impl<E> WasmError for E where E: Display+Copy {
   fn e(self) -> JsValue {
     let s = format!("{}", self);
     JsValue::from_str(&s)
@@ -26,7 +26,7 @@ trait WasmResult<V> {
   fn e(self) -> Result<V,JsValue>;
 }
 
-impl<E:Display, V> WasmResult<V> for Result<V, E> {
+impl<E:Display+Copy, V> WasmResult<V> for Result<V, E> {
   fn e(self) -> Result<V, JsValue> { self.map_err(WasmError::e) }
 }