Implement FromStr for JsString and JsValue

Author: Jules-Bertholet

crates/js-sys/src/lib.rs

@@ -18,9 +18,11 @@
 
 #![doc(html_root_url = "https://docs.rs/js-sys/0.2")]
 
+use std::convert;
 use std::f64;
 use std::fmt;
 use std::mem;
+use std::str;
 
 use wasm_bindgen::prelude::*;
 use wasm_bindgen::JsCast;
@@ -4297,6 +4299,13 @@ impl fmt::Debug for JsString {
     }
 }
 
+impl str::FromStr for JsString {
+    type Err = convert::Infallible;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(JsString::from(s))
+    }
+}
+
 // Symbol
 #[wasm_bindgen]
 extern "C" {

src/lib.rs

@@ -10,10 +10,12 @@
 #![doc(html_root_url = "https://docs.rs/wasm-bindgen/0.2")]
 #![cfg_attr(feature = "nightly", feature(unsize))]
 
+use core::convert::Infallible;
 use core::fmt;
 use core::marker;
 use core::mem;
 use core::ops::{Deref, DerefMut};
+use core::str::FromStr;
 
 use crate::convert::{FromWasmAbi, WasmOptionalF64, WasmSlice};
 
@@ -395,6 +397,13 @@ impl<'a> From<&'a str> for JsValue {
     }
 }
 
+impl FromStr for JsValue {
+    type Err = Infallible;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(Self::from_str(s))
+    }
+}
+
 if_std! {
     impl<'a> From<&'a String> for JsValue {
         #[inline]