rust/src/test/compile-fail/lint-dead-code-4.rs

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// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
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#![allow(unused_variables)]
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#![allow(non_camel_case_types)]
#![deny(dead_code)]
extern crate libc;
use std::num;
struct Foo {
x: uint,
b: bool, //~ ERROR: struct field is never used
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marker: std::kinds::marker::NoCopy
}
fn field_read(f: Foo) -> uint {
num::pow(f.x, 2)
}
enum XYZ {
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X, //~ ERROR variant is never used
Y { //~ ERROR variant is never used
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a: String,
b: int //~ ERROR: struct field is never used
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},
Z
}
fn field_match_in_patterns(b: XYZ) -> String {
match b {
Y { a, .. } => a,
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_ => "".to_string()
}
}
struct Bar {
x: uint, //~ ERROR: struct field is never used
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b: bool,
_guard: ()
}
#[repr(C)]
struct Baz {
x: libc::c_uint
}
fn field_match_in_let(f: Bar) -> bool {
let Bar { b, .. } = f;
b
}
fn main() {
field_read(Foo { x: 1, b: false, marker: std::kinds::marker::NoCopy });
field_match_in_patterns(Z);
field_match_in_let(Bar { x: 42u, b: true, _guard: () });
let _ = Baz { x: 0 };
}