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consider closures/ty-fn-defs when making trait selection keys
Fixes #42602.
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// Copyright 2016 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. | ||
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// Regression test for #42602. It used to be that we had | ||
// a dep-graph like | ||
// | ||
// typeck(foo) -> FnOnce -> typeck(bar) | ||
// | ||
// This was fixed by improving the resolution of the `FnOnce` trait | ||
// selection node. | ||
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// revisions:cfail1 | ||
// compile-flags:-Zquery-dep-graph | ||
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#![feature(rustc_attrs)] | ||
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fn main() { | ||
a::foo(); | ||
b::bar(); | ||
} | ||
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mod a { | ||
#[rustc_if_this_changed(HirBody)] | ||
pub fn foo() { | ||
let x = vec![1, 2, 3]; | ||
let v = || ::std::mem::drop(x); | ||
v(); | ||
} | ||
} | ||
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mod b { | ||
#[rustc_then_this_would_need(TypeckTables)] //[cfail1]~ ERROR no path | ||
pub fn bar() { | ||
let x = vec![1, 2, 3]; | ||
let v = || ::std::mem::drop(x); | ||
v(); | ||
} | ||
} |