2 files changed, 30 insertions, 0 deletions
diff --git a/vendor/wasm-bindgen-macro/src/lib.rs b/vendor/wasm-bindgen-macro/src/lib.rs
index c677aaf24..fbae81875 100644
--- a/vendor/wasm-bindgen-macro/src/lib.rs
+++ b/vendor/wasm-bindgen-macro/src/lib.rs
@@ -18,6 +18,35 @@ pub fn wasm_bindgen(attr: TokenStream, input: TokenStream) -> TokenStream {
     }
 }
 
+/// This macro takes a JS module as input and returns a URL that can be used to
+/// access it at runtime.
+///
+/// The module can be specified in a few ways:
+/// - You can use `inline_js = "..."` to create an inline JS file.
+/// - You can use `module = "/foo/bar"` to reference a file relative to the
+/// root of the crate the macro is invoked in.
+///
+/// The returned URL can be used for things like creating workers/worklets:
+/// ```no_run
+/// use web_sys::Worker;
+/// let worker = Worker::new(&wasm_bindgen::link_to!(module = "/src/worker.js"));
+/// ```
+#[proc_macro]
+pub fn link_to(input: TokenStream) -> TokenStream {
+    match wasm_bindgen_macro_support::expand_link_to(input.into()) {
+        Ok(tokens) => {
+            if cfg!(feature = "xxx_debug_only_print_generated_code") {
+                println!("{}", tokens);
+            }
+            tokens.into()
+        }
+        // This `String::clone` is here so that IDEs know this is supposed to be a
+        // `String` and can keep type-checking the rest of the program even if the macro
+        // fails.
+        Err(diagnostic) => (quote! { String::clone(#diagnostic) }).into(),
+    }
+}
+
 #[proc_macro_attribute]
 pub fn __wasm_bindgen_class_marker(attr: TokenStream, input: TokenStream) -> TokenStream {
     match wasm_bindgen_macro_support::expand_class_marker(attr.into(), input.into()) {
diff --git a/vendor/wasm-bindgen-macro/src/worker.js b/vendor/wasm-bindgen-macro/src/worker.js
new file mode 100644
index 000000000..360d4d429
--- /dev/null
+++ b/vendor/wasm-bindgen-macro/src/worker.js
@@ -0,0 +1 @@
+// This file is needed for the doctest of `crate::link_to`.