1 files changed, 89 insertions, 0 deletions
diff --git a/tests/ui/macros/macro-comma-behavior.rs b/tests/ui/macros/macro-comma-behavior.rs
new file mode 100644
index 00000000000..27d50ff3d57
--- /dev/null
+++ b/tests/ui/macros/macro-comma-behavior.rs
@@ -0,0 +1,89 @@
+// Companion test to the similarly-named file in run-pass.
+
+// compile-flags: -C debug_assertions=yes
+// revisions: std core
+
+#![feature(lang_items)]
+#![cfg_attr(core, no_std)]
+
+#[cfg(std)] use std::fmt;
+#[cfg(core)] use core::fmt;
+#[cfg(core)] #[lang = "eh_personality"] fn eh_personality() {}
+#[cfg(core)] #[lang = "eh_catch_typeinfo"] static EH_CATCH_TYPEINFO: u8 = 0;
+#[cfg(core)] #[lang = "panic_impl"] fn panic_impl(panic: &core::panic::PanicInfo) -> ! { loop {} }
+
+// (see documentation of the similarly-named test in run-pass)
+fn to_format_or_not_to_format() {
+    let falsum = || false;
+
+    // assert!(true, "{}",); // see run-pass
+
+    assert_eq!(1, 1, "{}",);
+    //[core]~^ ERROR no arguments
+    //[std]~^^ ERROR no arguments
+    assert_ne!(1, 2, "{}",);
+    //[core]~^ ERROR no arguments
+    //[std]~^^ ERROR no arguments
+
+    // debug_assert!(true, "{}",); // see run-pass
+
+    debug_assert_eq!(1, 1, "{}",);
+    //[core]~^ ERROR no arguments
+    //[std]~^^ ERROR no arguments
+    debug_assert_ne!(1, 2, "{}",);
+    //[core]~^ ERROR no arguments
+    //[std]~^^ ERROR no arguments
+
+    #[cfg(std)] {
+        eprint!("{}",);
+        //[std]~^ ERROR no arguments
+    }
+
+    #[cfg(std)] {
+        eprintln!("{}",);
+        //[std]~^ ERROR no arguments
+    }
+
+    #[cfg(std)] {
+        format!("{}",);
+        //[std]~^ ERROR no arguments
+    }
+
+    format_args!("{}",);
+    //[core]~^ ERROR no arguments
+    //[std]~^^ ERROR no arguments
+
+    // if falsum() { panic!("{}",); } // see run-pass
+
+    #[cfg(std)] {
+        print!("{}",);
+        //[std]~^ ERROR no arguments
+    }
+
+    #[cfg(std)] {
+        println!("{}",);
+        //[std]~^ ERROR no arguments
+    }
+
+    unimplemented!("{}",);
+    //[core]~^ ERROR no arguments
+    //[std]~^^ ERROR no arguments
+
+    // if falsum() { unreachable!("{}",); } // see run-pass
+
+    struct S;
+    impl fmt::Display for S {
+        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+            write!(f, "{}",)?;
+            //[core]~^ ERROR no arguments
+            //[std]~^^ ERROR no arguments
+
+            writeln!(f, "{}",)?;
+            //[core]~^ ERROR no arguments
+            //[std]~^^ ERROR no arguments
+            Ok(())
+        }
+    }
+}
+
+fn main() {}