ce70207250
looks like some mix of #18653 and `projection_must_outlive`, but that needs to be investigated further (crater run?)
53 lines
1.3 KiB
Rust
53 lines
1.3 KiB
Rust
// Copyright 2015 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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// Regression test for #22040.
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use std::fmt::Debug;
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trait Expr: Debug + PartialEq {
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fn print_element_count(&self);
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}
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//#[derive(PartialEq)]
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#[derive(Debug)]
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struct SExpr<'x> {
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elements: Vec<Box<Expr+ 'x>>,
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//~^ ERROR E0038
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}
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impl<'x> PartialEq for SExpr<'x> {
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fn eq(&self, other:&SExpr<'x>) -> bool {
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println!("L1: {} L2: {}", self.elements.len(), other.elements.len());
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let result = self.elements.len() == other.elements.len();
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println!("Got compare {}", result);
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return result;
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}
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}
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impl <'x> SExpr<'x> {
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fn new() -> SExpr<'x> { return SExpr{elements: Vec::new(),}; }
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}
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impl <'x> Expr for SExpr<'x> {
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fn print_element_count(&self) {
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println!("element count: {}", self.elements.len());
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}
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}
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fn main() {
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let a: Box<Expr> = Box::new(SExpr::new());
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let b: Box<Expr> = Box::new(SExpr::new());
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// assert_eq!(a , b);
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}
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