use hir::def::Def;
use hir::def_id::{DefId, LOCAL_CRATE};
use rustc::{infer, traits};
-use rustc::ty::{self, TyCtxt, LvaluePreference, Ty};
+use rustc::ty::{self, TyCtxt, TypeFoldable, LvaluePreference, Ty};
use rustc::ty::subst::Subst;
use rustc::ty::adjustment::{Adjustment, Adjust, AutoBorrow};
use syntax::abi;
}
}
}
- let mut err = if let Some(path) = unit_variant {
- let mut err = self.type_error_struct(call_expr.span, |_| {
- format!("`{}` is being called, but it is not a function", path)
- }, callee_ty);
+ let mut err = type_error_struct!(self.tcx.sess, call_expr.span, callee_ty, E0618,
+ "expected function, found `{}`",
+ if let Some(ref path) = unit_variant {
+ path.to_string()
+ } else {
+ callee_ty.to_string()
+ });
+ if let Some(path) = unit_variant {
err.help(&format!("did you mean to write `{}`?", path));
- err
- } else {
- self.type_error_struct(call_expr.span, |actual| {
- format!("expected function, found `{}`", actual)
- }, callee_ty)
- };
+ }
if let hir::ExprCall(ref expr, _) = call_expr.node {
let def = if let hir::ExprPath(ref qpath) = expr.node {
https://doc.rust-lang.org/book/
"##,
+E0618: r##"
+Attempted to call something which isn't a function nor a method.
+
+Erroneous code examples:
+
+```compile_fail,E0618
+enum X {
+ Entry,
+}
+
+X::Entry(); // error: expected function, found `X::Entry`
+
+// Or even simpler:
+let x = 0i32;
+x(); // error: expected function, found `i32`
+```
+
+Only functions and methods can be called using `()`. Example:
+
+```
+// We declare a function:
+fn i_am_a_function() {}
+
+// And we call it:
+i_am_a_function();
+```
+"##,
+
}
register_diagnostics! {
--- /dev/null
+// Copyright 2017 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.
+
+enum X {
+ Entry,
+}
+
+fn main() {
+ X::Entry(); //~ ERROR expected function, found `X::Entry` [E0618]
+ //~| HELP did you mean to write `X::Entry`?
+ let x = 0i32;
+ x(); //~ ERROR expected function, found `i32` [E0618]
+}
fn main() {
let e2 = Empty2(); //~ ERROR expected function, found `Empty2`
let e4 = E::Empty4();
- //~^ ERROR `E::Empty4` is being called, but it is not a function
+ //~^ ERROR expected function, found `E::Empty4` [E0618]
//~| HELP did you mean to write `E::Empty4`?
let xe2 = XEmpty2(); //~ ERROR expected function, found `empty_struct::XEmpty2`
let xe4 = XE::XEmpty4();
- //~^ ERROR `XE::XEmpty4` is being called, but it is not a function
+ //~^ ERROR expected function, found `XE::XEmpty4` [E0618]
//~| HELP did you mean to write `XE::XEmpty4`?
}