1 files changed, 27 insertions, 0 deletions
diff --git a/src/test/ui/proc-macro/auxiliary/hygiene_example_codegen.rs b/src/test/ui/proc-macro/auxiliary/hygiene_example_codegen.rs
new file mode 100644
index 000000000..2bd4d3336
--- /dev/null
+++ b/src/test/ui/proc-macro/auxiliary/hygiene_example_codegen.rs
@@ -0,0 +1,27 @@
+// force-host
+// no-prefer-dynamic
+
+#![feature(proc_macro_quote)]
+#![crate_type = "proc-macro"]
+
+extern crate proc_macro as proc_macro_renamed; // This does not break `quote!`
+
+use proc_macro_renamed::{TokenStream, quote};
+
+#[proc_macro]
+pub fn hello(input: TokenStream) -> TokenStream {
+    quote!(hello_helper!($input))
+    //^ `hello_helper!` always resolves to the following proc macro,
+    //| no matter where `hello!` is used.
+}
+
+#[proc_macro]
+pub fn hello_helper(input: TokenStream) -> TokenStream {
+    quote! {
+        extern crate hygiene_example; // This is never a conflict error
+        let string = format!("hello {}", $input);
+        //^ `format!` always resolves to the prelude macro,
+        //| even if a different `format!` is in scope where `hello!` is used.
+        hygiene_example::print(&string)
+    }
+}