fn foo() {
    let _ = true;
    let _ = false;
    let _ = 1;
    let _ = 2.0;
    let _ = b'a';
    let _ = 'b';
    let _ = "c";
    let _ = r"d";
    let _ = b"e";
    let _ = br"f";
    let _ = c"g";
    let _ = cr"h";
}
