mirror of https://github.com/rust-lang/rust
91 lines
1.5 KiB
Rust
91 lines
1.5 KiB
Rust
#![allow(unused_variables)]
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#![allow(non_camel_case_types)]
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#![allow(clashing_extern_declarations)]
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#![deny(dead_code)]
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#![crate_type="lib"]
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pub use extern_foo as x;
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extern "C" {
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pub fn extern_foo();
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}
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struct Foo; //~ ERROR: struct `Foo` is never constructed
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impl Foo {
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fn foo(&self) { //~ ERROR: method `foo` is never used
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bar()
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}
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}
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fn bar() { //~ ERROR: function `bar` is never used
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fn baz() {}
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Foo.foo();
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baz();
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}
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// no warning
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struct Foo2;
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impl Foo2 { fn foo2(&self) { bar2() } }
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fn bar2() {
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fn baz2() {}
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Foo2.foo2();
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baz2();
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}
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pub fn pub_fn() {
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let foo2_struct = Foo2;
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foo2_struct.foo2();
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blah::baz();
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}
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mod blah {
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// not warned because it's used in the parameter of `free` and return of
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// `malloc` below, which are also used.
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enum c_void {}
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extern "C" {
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fn free(p: *const c_void);
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fn malloc(size: usize) -> *const c_void;
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}
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pub fn baz() {
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unsafe { free(malloc(4)); }
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}
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}
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enum c_void {} //~ ERROR: enum `c_void` is never used
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extern "C" {
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fn free(p: *const c_void); //~ ERROR: function `free` is never used
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}
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// Check provided method
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mod inner {
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pub trait Trait {
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fn f(&self) { f(); }
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}
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impl Trait for isize {}
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fn f() {}
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}
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fn anon_const() -> [(); {
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fn blah() {} //~ ERROR: function `blah` is never used
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1
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}] {
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[(); {
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fn blah() {} //~ ERROR: function `blah` is never used
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1
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}]
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}
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pub fn foo() {
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let a: &dyn inner::Trait = &1_isize;
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a.f();
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anon_const();
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}
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