d00d4dfe0d
This CL makes a number of small changes to dyn compatibility errors: - "object safety" has been renamed to "dyn-compatibility" throughout - "Convert to enum" suggestions are no longer generated when there exists a type-generic impl of the trait or an impl for `dyn OtherTrait` - Several error messages are reorganized for user readability Additionally, the dyn compatibility error creation code has been split out into functions. cc #132713 cc #133267
45 lines
1009 B
Rust
45 lines
1009 B
Rust
// 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<dyn 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<dyn Expr> = Box::new(SExpr::new());
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//~^ ERROR: `Expr` is not dyn compatible
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let b: Box<dyn Expr> = Box::new(SExpr::new());
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//~^ ERROR: `Expr` is not dyn compatible
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// assert_eq!(a , b);
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}
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