1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 pub enum Expr<'var, VAR> {
12 Let(Box<Expr<'var, VAR>>,
13 Box<for<'v> Fn(Expr<'v, VAR>) -> Expr<'v, VAR> + 'var>)
17 (a: Expr<'var, VAR>, b: Expr<'var, VAR>) -> Expr<'var, VAR> {
21 pub fn let_<'var, VAR, F: for<'v> Fn(Expr<'v, VAR>) -> Expr<'v, VAR>>
22 (a: Expr<'var, VAR>, b: F) -> Expr<'var, VAR> {
27 let ex = |x| { //~ ERROR type annotations needed
29 let_(add(x, x), |x|x)})};