From 33bf18ce79c5e3b99a3058248102e63306a8759a Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 11 Oct 2020 23:23:54 +0100
Subject: [PATCH] this jsstring does not call the text*coder machinery

later note: but actually I'm not going to bother about this.
TextEncoder and TextDecoder are supported in everything other
than earlier versions of Edge which probably don't work anyway

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 wasm/wasm.rs | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/wasm/wasm.rs b/wasm/wasm.rs
index e6cf20da..2540a803 100644
--- a/wasm/wasm.rs
+++ b/wasm/wasm.rs
@@ -12,10 +12,16 @@ trait WasmError {
   fn e(self) -> JsValue;
 }
 
+fn mkstr(s: &str) -> JsValue {
+  let s : Vec<u16> = s.encode_utf16().collect();
+  let jss = js_sys::JsString::from_char_code(&s);
+  jss.into()
+}
+
 impl<E> WasmError for E where E: Display {
   fn e(self) -> JsValue {
     let s = format!("{}", self);
-    JsValue::from_str(&s)
+    mkstr(&s)
   }
 }
 
@@ -36,7 +42,14 @@ pub fn check(packed: &JsValue) {
   ZCoord::check_str(&s).ok_or(zcoord::ParseError).e()?;
 }
 
-const X : &'static str = "invalid value passed to wasm";
+#[wasm_bindgen]
+pub fn jsstring(x: u32) -> JsValue {
+  let s = format!("hi!{:?}",x);
+  //  JsValue::from_str(&s);
+  mkstr(&s)
+}
+
+//const X : &'static str = "invalid value passed to wasm";
 /*
 #[throws(JsValue)]
 #[wasm_bindgen]
-- 
2.30.2