1 files changed, 31 insertions, 0 deletions
diff --git a/tests/ui/proc-macro/signature-proc-macro.rs b/tests/ui/proc-macro/signature-proc-macro.rs
new file mode 100644
index 000000000..54770aacd
--- /dev/null
+++ b/tests/ui/proc-macro/signature-proc-macro.rs
@@ -0,0 +1,31 @@
+// force-host
+// no-prefer-dynamic
+
+#![crate_type = "proc-macro"]
+
+extern crate proc_macro;
+use proc_macro::TokenStream;
+
+#[proc_macro]
+pub fn bad_input(input: String) -> TokenStream {
+    //~^ ERROR mismatched function-like proc macro signature
+    ::proc_macro::TokenStream::new()
+}
+
+#[proc_macro]
+pub fn bad_output(input: TokenStream) -> String {
+    //~^ ERROR mismatched function-like proc macro signature
+    String::from("blah")
+}
+
+#[proc_macro]
+pub fn bad_everything(input: String) -> String {
+    //~^ ERROR mismatched function-like proc macro signature
+    //~| ERROR mismatched function-like proc macro signature
+    input
+}
+
+#[proc_macro]
+pub fn too_many(a: TokenStream, b: TokenStream, c: String) -> TokenStream {
+    //~^ ERROR mismatched function-like proc macro signature
+}