| // 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. |
| |
| #![allow(unused_variables)] |
| #![allow(non_camel_case_types)] |
| #![deny(dead_code)] |
| |
| struct Foo { |
| x: usize, |
| b: bool, //~ ERROR: field is never used |
| } |
| |
| fn field_read(f: Foo) -> usize { |
| f.x.pow(2) |
| } |
| |
| enum XYZ { |
| X, //~ ERROR variant is never constructed |
| Y { //~ ERROR variant is never constructed |
| a: String, |
| b: i32, |
| c: i32, |
| }, |
| Z |
| } |
| |
| enum ABC { //~ ERROR enum is never used |
| A, |
| B { |
| a: String, |
| b: i32, |
| c: i32, |
| }, |
| C |
| } |
| |
| // ensure struct variants get warning for their fields |
| enum IJK { |
| I, //~ ERROR variant is never constructed |
| J { |
| a: String, |
| b: i32, //~ ERROR field is never used |
| c: i32, //~ ERROR field is never used |
| }, |
| K //~ ERROR variant is never constructed |
| |
| } |
| |
| fn struct_variant_partial_use(b: IJK) -> String { |
| match b { |
| IJK::J { a, b: _, .. } => a, |
| _ => "".to_string() |
| } |
| } |
| |
| fn field_match_in_patterns(b: XYZ) -> String { |
| match b { |
| XYZ::Y { a, b: _, .. } => a, |
| _ => "".to_string() |
| } |
| } |
| |
| struct Bar { |
| x: usize, //~ ERROR: field is never used |
| b: bool, |
| c: bool, //~ ERROR: field is never used |
| _guard: () |
| } |
| |
| #[repr(C)] |
| struct Baz { |
| x: u32, |
| } |
| |
| fn field_match_in_let(f: Bar) -> bool { |
| let Bar { b, c: _, .. } = f; |
| b |
| } |
| |
| fn main() { |
| field_read(Foo { x: 1, b: false }); |
| field_match_in_patterns(XYZ::Z); |
| struct_variant_partial_use(IJK::J { a: "".into(), b: 1, c: -1 }); |
| field_match_in_let(Bar { x: 42, b: true, c: false, _guard: () }); |
| let _ = Baz { x: 0 }; |
| } |