Fix parsing some Rust keywords in attributes

Closes #193

crates/backend/src/ast.rs

@@ -908,7 +908,7 @@ impl syn::synom::Synom for BindgenAttr {
             call!(term, "getter") >>
             val: option!(do_parse!(
                 punct!(=) >>
-                s: syn!(syn::Ident) >>
+                s: call!(term2ident) >>
                 (s)
             )) >>
             (val)
@@ -918,7 +918,7 @@ impl syn::synom::Synom for BindgenAttr {
             call!(term, "setter") >>
             val: option!(do_parse!(
                 punct!(=) >>
-                s: syn!(syn::Ident) >>
+                s: call!(term2ident) >>
                 (s)
             )) >>
             (val)
@@ -931,7 +931,7 @@ impl syn::synom::Synom for BindgenAttr {
         do_parse!(
             call!(term, "js_namespace") >>
             punct!(=) >>
-            ns: syn!(syn::Ident) >>
+            ns: call!(term2ident) >>
             (ns)
         )=> { BindgenAttr::JsNamespace }
         |
@@ -952,7 +952,7 @@ impl syn::synom::Synom for BindgenAttr {
         do_parse!(
             call!(term, "js_name") >>
             punct!(=) >>
-            ns: syn!(syn::Ident) >>
+            ns: call!(term2ident) >>
             (ns)
         )=> { BindgenAttr::JsName }
     ));
@@ -995,6 +995,19 @@ fn term<'a>(cursor: syn::buffer::Cursor<'a>, name: &str) -> syn::synom::PResult<
     syn::parse_error()
 }
 
+fn term2ident<'a>(cursor: syn::buffer::Cursor<'a>)
+    -> syn::synom::PResult<'a, syn::Ident>
+{
+    if let Some((term, next)) = cursor.term() {
+        let n = term.to_string();
+        if !n.starts_with("'") {
+            let i = syn::Ident::new(&n, term.span());
+            return Ok((i, next));
+        }
+    }
+    syn::parse_error()
+}
+
 fn assert_no_lifetimes(decl: &mut syn::FnDecl) {
     struct Walk;
 

tests/all/imports.rs

@@ -429,3 +429,38 @@ fn versions() {
         "#)
         .test();
 }
+
+#[test]
+fn rust_keyword() {
+    project()
+        .file("src/lib.rs", r#"
+            #![feature(proc_macro, wasm_custom_section, wasm_import_module)]
+
+            extern crate wasm_bindgen;
+
+            use wasm_bindgen::prelude::*;
+
+            #[wasm_bindgen(module = "./test")]
+            extern {
+                #[wasm_bindgen(js_name = self)]
+                fn foo() -> u32;
+            }
+
+            #[wasm_bindgen]
+            pub fn run() {
+                assert_eq!(foo(), 2);
+            }
+        "#)
+        .file("test.ts", r#"
+            import { run } from "./out";
+
+            export function self() {
+                return 2;
+            }
+
+            export function test() {
+                run();
+            }
+        "#)
+        .test();
+}