Demangle Rust symbols by default

crates/cli-support/src/js.rs

@@ -1171,7 +1171,7 @@ impl<'a> Context<'a> {
         let module = mem::replace(self.module, Module::default());
         let wasm_bytes = parity_wasm::serialize(module).unwrap();
         let bytes = wasm_gc::Config::new()
-            .demangle(false)
+            .demangle(self.config.demangle)
             .gc(&wasm_bytes)
             .unwrap();
         *self.module = deserialize_buffer(&bytes).unwrap();

crates/cli-support/src/lib.rs

@@ -19,6 +19,7 @@ pub struct Bindgen {
     browser: bool,
     debug: bool,
     typescript: bool,
+    demangle: bool,
 }
 
 #[derive(Debug)]
@@ -38,6 +39,7 @@ impl Bindgen {
             browser: false,
             debug: false,
             typescript: false,
+            demangle: true,
         }
     }
 
@@ -66,6 +68,11 @@ impl Bindgen {
         self
     }
 
+    pub fn demangle(&mut self, demangle: bool) -> &mut Bindgen {
+        self.demangle = demangle;
+        self
+    }
+
     pub fn generate<P: AsRef<Path>>(&mut self, path: P) -> Result<(), Error> {
         self._generate(path.as_ref())
     }

crates/cli/src/bin/wasm-bindgen.rs

@@ -24,6 +24,7 @@ Options:
     --browser                Generate output that only works in a browser
     --typescript             Output a TypeScript definition file
     --debug                  Include otherwise-extraneous debug checks in output
+    --no-demangle            Don't demangle Rust symbol names
     -V --version             Print the version number of wasm-bindgen
 ";
 
@@ -35,6 +36,7 @@ struct Args {
     flag_out_dir: Option<PathBuf>,
     flag_debug: bool,
     flag_version: bool,
+    flag_no_demangle: bool,
     arg_input: Option<PathBuf>,
 }
 
@@ -58,6 +60,7 @@ fn main() {
      .nodejs(args.flag_nodejs)
      .browser(args.flag_browser)
      .debug(args.flag_debug)
+     .demangle(!args.flag_no_demangle)
      .typescript(args.flag_typescript);
 
     let out_dir = match args.flag_out_dir {