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|
//@ revisions: stable2021 classic2021 structural2021 classic2024 structural2024
//@[stable2021] edition: 2021
//@[classic2021] edition: 2021
//@[structural2021] edition: 2021
//@[classic2024] edition: 2024
//@[structural2024] edition: 2024
//@ dont-require-annotations: NOTE
//! Test cases for poorly-typed patterns in edition 2024 which are caught by HIR typeck. These must
//! be separate from cases caught by MIR borrowck or the latter errors may not be emitted.
#![allow(incomplete_features)]
#![cfg_attr(any(classic2021, classic2024), feature(ref_pat_eat_one_layer_2024))]
#![cfg_attr(any(structural2021, structural2024), feature(ref_pat_eat_one_layer_2024_structural))]
pub fn main() {
if let Some(&mut x) = &Some(&mut 0) {
//[classic2024]~^ ERROR: mismatched types
//[classic2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(any(stable2021, classic2021, structural2021))] let _: u32 = x;
#[cfg(structural2024)] let _: &u32 = x;
}
if let Some(&mut Some(&x)) = &Some(&mut Some(0)) {
//[stable2021,classic2021,structural2021,classic2024]~^ ERROR: mismatched types
//[stable2021,classic2021,structural2021]~| NOTE expected integer, found `&_`
//[classic2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(structural2024)] let _: u32 = x;
}
if let Some(Some(&mut x)) = &Some(Some(&mut 0)) {
//[classic2024]~^ ERROR: mismatched types
//[classic2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(any(stable2021, classic2021, structural2021))] let _: u32 = x;
#[cfg(structural2024)] let _: &u32 = x;
}
if let Some(&mut Some(&_)) = &Some(&Some(0)) {
//~^ ERROR: mismatched types
//[stable2021,classic2021,structural2021]~| NOTE types differ in mutability
//[classic2024,structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
}
if let Some(&Some(&mut x)) = &Some(&mut Some(0)) {
//[stable2021,classic2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE types differ in mutability
//[classic2021,structural2021]~| NOTE expected integer, found `&mut _`
//[structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(classic2024)] let _: u32 = x;
}
if let Some(&Some(&mut _)) = &mut Some(&Some(0)) {
//~^ ERROR: mismatched types
//[stable2021,classic2021,structural2021]~| NOTE expected integer, found `&mut _`
//[classic2024,structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
}
if let Some(&Some(Some(&mut x))) = &Some(Some(&mut Some(0))) {
//[stable2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE expected `Option<&mut Option<{integer}>>`, found `&_`
//[structural2021,structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(any(classic2021, classic2024))] let _: u32 = x;
}
if let Some(&mut Some(x)) = &Some(Some(0)) {
//~^ ERROR: mismatched types
//[stable2021]~| NOTE expected `Option<{integer}>`, found `&mut _`
//[classic2021,structural2021,classic2024,structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
}
}
fn structural_errors_0() {
let &[&mut x] = &&mut [0];
//[stable2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE expected integer, found `&mut _`
//[structural2021,structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(any(classic2021, classic2024))] let _: u32 = x;
let &[&mut x] = &mut &mut [0];
//[stable2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE types differ in mutability
//[structural2021,structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(any(classic2021, classic2024))] let _: u32 = x;
let &[&mut ref x] = &&mut [0];
//[stable2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE expected integer, found `&mut _`
//[structural2021,structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(any(classic2021, classic2024))] let _: &u32 = x;
let &[&mut ref x] = &mut &mut [0];
//[stable2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE types differ in mutability
//[structural2021,structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(any(classic2021, classic2024))] let _: &u32 = x;
let &[&mut mut x] = &&mut [0];
//[stable2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE expected integer, found `&mut _`
//[structural2021,structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(any(classic2021, classic2024))] let _: u32 = x;
let &[&mut mut x] = &mut &mut [0];
//[stable2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE types differ in mutability
//[structural2021,structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(any(classic2021, classic2024))] let _: u32 = x;
}
fn structural_errors_1() {
let [&(mut x)] = &[&0];
//[structural2024]~^ ERROR: binding cannot be both mutable and by-reference
#[cfg(any(stable2021, classic2021, structural2021))] let _: u32 = x;
#[cfg(classic2024)] let _: &u32 = x;
let [&(mut x)] = &mut [&0];
//[structural2024]~^ ERROR: binding cannot be both mutable and by-reference
#[cfg(any(stable2021, classic2021, structural2021))] let _: u32 = x;
#[cfg(classic2024)] let _: &u32 = x;
}
fn structural_errors_2() {
let [&&mut x] = &[&mut 0];
//[stable2021,classic2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE types differ in mutability
//[classic2021,structural2021] NOTE expected integer, found `&mut _`
//[structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(classic2024)] let _: u32 = x;
let [&&mut x] = &mut [&mut 0];
//[stable2021,classic2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE types differ in mutability
//[classic2021,structural2021] NOTE expected integer, found `&mut _`
//[structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(classic2024)] let _: u32 = x;
let [&&mut ref x] = &[&mut 0];
//[stable2021,classic2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE types differ in mutability
//[classic2021,structural2021] NOTE expected integer, found `&mut _`
//[structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(classic2024)] let _: &u32 = x;
let [&&mut ref x] = &mut [&mut 0];
//[stable2021,classic2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE types differ in mutability
//[classic2021,structural2021] NOTE expected integer, found `&mut _`
//[structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(classic2024)] let _: &u32 = x;
let [&&mut mut x] = &[&mut 0];
//[stable2021,classic2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE types differ in mutability
//[classic2021,structural2021] NOTE expected integer, found `&mut _`
//[structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(classic2024)] let _: u32 = x;
let [&&mut mut x] = &mut [&mut 0];
//[stable2021,classic2021,structural2021,structural2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE types differ in mutability
//[classic2021,structural2021] NOTE expected integer, found `&mut _`
//[structural2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(classic2024)] let _: u32 = x;
}
fn classic_errors_0() {
let [&mut x] = &[&mut 0];
//[classic2024]~^ ERROR: mismatched types
//[classic2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(any(stable2021, classic2021, structural2021))] let _: u32 = x;
#[cfg(structural2024)] let _: &u32 = x;
let [&mut &x] = &[&mut 0];
//[stable2021,classic2021,structural2021,classic2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE expected integer, found `&_`
//[classic2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(structural2024)] let _: u32 = x;
let [&mut &ref x] = &[&mut 0];
//[stable2021,classic2021,structural2021,classic2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE expected integer, found `&_`
//[classic2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(structural2024)] let _: &u32 = x;
let [&mut &(mut x)] = &[&mut 0];
//[stable2021,classic2021,structural2021,classic2024]~^ ERROR: mismatched types
//[stable2021]~| NOTE expected integer, found `&_`
//[classic2024]~| NOTE cannot match inherited `&` with `&mut` pattern
#[cfg(structural2024)] let _: u32 = x;
}
|
