Asked if missing (), then asks about an anonymous function. Also added test.

This commit is contained in:
Davis Silverman 2014-03-16 16:46:02 -04:00
parent b4d324334c
commit 8b6592ef1a
2 changed files with 38 additions and 2 deletions

View File

@ -2317,11 +2317,13 @@ fn check_expr_with_unifier(fcx: @FnCtxt,
fcx.type_error_message(
expr.span,
|actual| {
format!("attempted to take value of method `{}` on type `{}` \
(try writing an anonymous function)",
format!("attempted to take value of method `{}` on type `{}`",
token::get_name(field), actual)
},
expr_t, None);
tcx.sess.span_note(expr.span,
"maybe a missing `()` to call it? If not, try an anonymous function.");
}
None => {

View File

@ -0,0 +1,34 @@
// Copyright 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.
// Tests to make sure that parens are needed for method calls without arguments.
// outputs text to make sure either an anonymous function is provided or
// open-close '()' parens are given
struct Point {
x: int,
y: int
}
impl Point {
fn new() -> Point {
Point{x:0, y:0}
}
fn get_x(&self) -> int {
self.x
}
}
fn main() {
let point: Point = Point::new();
let px: int = point.get_x;//~ ERROR attempted to take value of method `get_x` on type `Point`
//~^ NOTE maybe a missing `()` to call it? If not, try an anonymous function.
}