librustc: Fix a couple of cases in which unboxed closure typechecking

code wasn't considering the zero-argument case.

Closes #16168.
This commit is contained in:
Patrick Walton 2014-08-20 13:37:00 -07:00
parent 43f040dac8
commit 7f4c5be81a
3 changed files with 27 additions and 2 deletions

View File

@ -563,7 +563,11 @@ pub fn trait_ref_for_unboxed_function<AC:AstConv,
.map(|input| {
ast_ty_to_ty(this, rscope, &*input.ty)
}).collect::<Vec<_>>();
let input_tuple = ty::mk_tup(this.tcx(), input_types);
let input_tuple = if input_types.len() == 0 {
ty::mk_nil()
} else {
ty::mk_tup(this.tcx(), input_types)
};
let output_type = ast_ty_to_ty(this,
rscope,
&*unboxed_function.decl.output);

View File

@ -2678,7 +2678,11 @@ fn check_expr_with_unifier(fcx: &FnCtxt,
// Tuple up the arguments and insert the resulting function type into
// the `unboxed_closures` table.
fn_ty.sig.inputs = vec![ty::mk_tup(fcx.tcx(), fn_ty.sig.inputs)];
fn_ty.sig.inputs = if fn_ty.sig.inputs.len() == 0 {
vec![ty::mk_nil()]
} else {
vec![ty::mk_tup(fcx.tcx(), fn_ty.sig.inputs)]
};
let kind = match kind {
ast::FnUnboxedClosureKind => ty::FnUnboxedClosureKind,

View File

@ -0,0 +1,17 @@
// 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.
#![feature(unboxed_closures)]
fn main() {
let mut zero = |&mut:| {};
zero.call_mut(());
}