92 lines
3.1 KiB
Rust
92 lines
3.1 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(core)]
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use std::boxed::FnBox;
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struct FuncContainer {
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f1: fn(data: u8),
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f2: extern "C" fn(data: u8),
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f3: unsafe fn(data: u8),
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}
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struct FuncContainerOuter {
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container: Box<FuncContainer>
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}
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struct Obj<F> where F: FnOnce() -> u32 {
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closure: F,
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not_closure: usize,
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}
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struct BoxedObj {
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boxed_closure: Box<FnBox() -> u32>,
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}
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struct Wrapper<F> where F: FnMut() -> u32 {
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wrap: Obj<F>,
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}
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fn func() -> u32 {
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0
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}
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fn check_expression() -> Obj<Box<FnBox() -> u32>> {
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Obj { closure: Box::new(|| 42_u32) as Box<FnBox() -> u32>, not_closure: 42 }
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}
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fn main() {
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// test variations of function
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let o_closure = Obj { closure: || 42, not_closure: 42 };
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o_closure.closure(); //~ ERROR no method named `closure` found
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//~^ NOTE use `(o_closure.closure)(...)` if you meant to call the function stored
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o_closure.not_closure(); //~ ERROR no method named `not_closure` found
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//~^ NOTE did you mean to write `o_closure.not_closure`?
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let o_func = Obj { closure: func, not_closure: 5 };
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o_func.closure(); //~ ERROR no method named `closure` found
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//~^ NOTE use `(o_func.closure)(...)` if you meant to call the function stored
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let boxed_fn = BoxedObj { boxed_closure: Box::new(func) };
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boxed_fn.boxed_closure();//~ ERROR no method named `boxed_closure` found
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//~^ NOTE use `(boxed_fn.boxed_closure)(...)` if you meant to call the function stored
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let boxed_closure = BoxedObj { boxed_closure: Box::new(|| 42_u32) as Box<FnBox() -> u32> };
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boxed_closure.boxed_closure();//~ ERROR no method named `boxed_closure` found
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//~^ NOTE use `(boxed_closure.boxed_closure)(...)` if you meant to call the function stored
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// test expression writing in the notes
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let w = Wrapper { wrap: o_func };
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w.wrap.closure();//~ ERROR no method named `closure` found
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//~^ NOTE use `(w.wrap.closure)(...)` if you meant to call the function stored
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w.wrap.not_closure();//~ ERROR no method named `not_closure` found
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//~^ NOTE did you mean to write `w.wrap.not_closure`?
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check_expression().closure();//~ ERROR no method named `closure` found
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//~^ NOTE use `(check_expression().closure)(...)` if you meant to call the function stored
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}
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impl FuncContainerOuter {
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fn run(&self) {
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unsafe {
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(*self.container).f1(1); //~ ERROR no method named `f1` found
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//~^ NOTE use `((*self.container).f1)(...)`
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(*self.container).f2(1); //~ ERROR no method named `f2` found
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//~^ NOTE use `((*self.container).f2)(...)`
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(*self.container).f3(1); //~ ERROR no method named `f3` found
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//~^ NOTE use `((*self.container).f3)(...)`
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}
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}
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}
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