rust/tests/ui/borrowck/suggest-assign-rvalue.rs

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#![allow(dead_code)]
#![feature(never_type)]
#[derive(Debug, Default)]
struct Demo {}
#[derive(Debug)]
struct DemoNoDef {}
fn apple(_: u32) {}
fn banana() {
let chaenomeles;
apple(chaenomeles);
//~^ ERROR used binding `chaenomeles` isn't initialized [E0381]
}
fn main() {
let my_bool: bool = bool::default();
println!("my_bool: {}", my_bool);
let my_float: f32;
println!("my_float: {}", my_float);
//~^ ERROR used binding `my_float` isn't initialized
let demo: Demo;
println!("demo: {:?}", demo);
//~^ ERROR used binding `demo` isn't initialized
let demo_no: DemoNoDef;
println!("demo_no: {:?}", demo_no);
//~^ ERROR used binding `demo_no` isn't initialized
let arr: [i32; 5];
println!("arr: {:?}", arr);
//~^ ERROR used binding `arr` isn't initialized
let foo: Vec<&str>;
println!("foo: {:?}", foo);
//~^ ERROR used binding `foo` isn't initialized
let my_string: String;
println!("my_string: {}", my_string);
//~^ ERROR used binding `my_string` isn't initialized
let my_int: &i32;
println!("my_int: {}", *my_int);
//~^ ERROR used binding `my_int` isn't initialized
let hello: &str;
println!("hello: {}", hello);
//~^ ERROR used binding `hello` isn't initialized
let never: !;
println!("never: {}", never);
//~^ ERROR used binding `never` isn't initialized [E0381]
banana();
}