auto merge of #13713 : edwardw/rust/methodcall-span, r=alexcrichton

Specifically, the method parameter cardinality mismatch or missing
method error message span now gets method itself exactly. It was the
whole expression.

Closes #9390
Closes #13684
Closes #13709

1 files changed, 30 insertions, 0 deletions

diff --git a/src/test/compile-fail/method-call-err-msg.rs b/src/test/compile-fail/method-call-err-msg.rs
new file mode 100644
index 00000000000..3610a0e2e9d
--- /dev/null
+++ b/src/test/compile-fail/method-call-err-msg.rs
@@ -0,0 +1,30 @@
+// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Test that parameter cardinality or missing method error gets span exactly.
+
+pub struct Foo;
+impl Foo {
+    fn zero(self) -> Foo { self }
+    fn one(self, _: int) -> Foo { self }
+    fn two(self, _: int, _: int) -> Foo { self }
+}
+
+fn main() {
+    let x = Foo;
+    x.zero(0)   //~ ERROR this function takes 0 parameters but 1 parameter was supplied
+     .one()     //~ ERROR this function takes 1 parameter but 0 parameters were supplied
+     .two(0);   //~ ERROR this function takes 2 parameters but 1 parameter was supplied
+
+    let y = Foo;
+    y.zero()
+     .take()    //~ ERROR type `Foo` does not implement any method in scope named `take`
+     .one(0);
+}