rust/src/test/ui/parser/increment-notfixed.rs

struct Foo {
    bar: Bar,
}

struct Bar {
    qux: i32,
}

fn post_field() {
    let foo = Foo { bar: Bar { qux: 0 } };
    foo.bar.qux++;
    //~^ ERROR Rust has no postfix increment operator
    println!("{}", foo.bar.qux);
}

fn post_field_tmp() {
    struct S {
        tmp: i32
    }
    let s = S { tmp: 0 };
    s.tmp++;
    //~^ ERROR Rust has no postfix increment operator
    println!("{}", s.tmp);
}

fn pre_field() {
    let foo = Foo { bar: Bar { qux: 0 } };
    ++foo.bar.qux;
    //~^ ERROR Rust has no prefix increment operator
    println!("{}", foo.bar.qux);
}

fn main() {
    post_field();
    post_field_tmp();
    pre_field();
}