src/test/ui/lint/lint-ctypes.rs

   1 #![feature(rustc_private)]
   2
   3 #![allow(private_in_public)]
   4 #![deny(improper_ctypes)]
   5
   6 extern crate libc;
   7
   8 use std::cell::UnsafeCell;
   9 use std::marker::PhantomData;
  10
  11 trait Bar { }
  12 trait Mirror { type It: ?Sized; }
  13 impl<T: ?Sized> Mirror for T { type It = Self; }
  14 #[repr(C)]
  15 pub struct StructWithProjection(*mut <StructWithProjection as Mirror>::It);
  16 #[repr(C)]
  17 pub struct StructWithProjectionAndLifetime<'a>(
  18     &'a mut <StructWithProjectionAndLifetime<'a> as Mirror>::It
  19 );
  20 pub type I32Pair = (i32, i32);
  21 #[repr(C)]
  22 pub struct ZeroSize;
  23 pub type RustFn = fn();
  24 pub type RustBadRet = extern "C" fn() -> Box<u32>;
  25 pub type CVoidRet = ();
  26 pub struct Foo;
  27 #[repr(transparent)]
  28 pub struct TransparentI128(i128);
  29 #[repr(transparent)]
  30 pub struct TransparentStr(&'static str);
  31 #[repr(transparent)]
  32 pub struct TransparentBadFn(RustBadRet);
  33 #[repr(transparent)]
  34 pub struct TransparentInt(u32);
  35 #[repr(transparent)]
  36 pub struct TransparentRef<'a>(&'a TransparentInt);
  37 #[repr(transparent)]
  38 pub struct TransparentLifetime<'a>(*const u8, PhantomData<&'a ()>);
  39 #[repr(transparent)]
  40 pub struct TransparentUnit<U>(f32, PhantomData<U>);
  41 #[repr(transparent)]
  42 pub struct TransparentCustomZst(i32, ZeroSize);
  43
  44 #[repr(C)]
  45 pub struct ZeroSizeWithPhantomData(::std::marker::PhantomData<i32>);
  46
  47 extern "C" {
  48     pub fn ptr_type1(size: *const Foo); //~ ERROR: uses type `Foo`
  49     pub fn ptr_type2(size: *const Foo); //~ ERROR: uses type `Foo`
  50     pub fn slice_type(p: &[u32]); //~ ERROR: uses type `[u32]`
  51     pub fn str_type(p: &str); //~ ERROR: uses type `str`
  52     pub fn box_type(p: Box<u32>); //~ ERROR uses type `Box<u32>`
  53     pub fn opt_box_type(p: Option<Box<u32>>);
  54     //~^ ERROR uses type `Option<Box<u32>>`
  55     pub fn char_type(p: char); //~ ERROR uses type `char`
  56     pub fn i128_type(p: i128); //~ ERROR uses type `i128`
  57     pub fn u128_type(p: u128); //~ ERROR uses type `u128`
  58     pub fn trait_type(p: &dyn Bar); //~ ERROR uses type `dyn Bar`
  59     pub fn tuple_type(p: (i32, i32)); //~ ERROR uses type `(i32, i32)`
  60     pub fn tuple_type2(p: I32Pair); //~ ERROR uses type `(i32, i32)`
  61     pub fn zero_size(p: ZeroSize); //~ ERROR uses type `ZeroSize`
  62     pub fn zero_size_phantom(p: ZeroSizeWithPhantomData);
  63     //~^ ERROR uses type `ZeroSizeWithPhantomData`
  64     pub fn zero_size_phantom_toplevel()
  65         -> ::std::marker::PhantomData<bool>; //~ ERROR uses type `PhantomData<bool>`
  66     pub fn fn_type(p: RustFn); //~ ERROR uses type `fn()`
  67     pub fn fn_type2(p: fn()); //~ ERROR uses type `fn()`
  68     pub fn fn_contained(p: RustBadRet); //~ ERROR: uses type `Box<u32>`
  69     pub fn transparent_i128(p: TransparentI128); //~ ERROR: uses type `i128`
  70     pub fn transparent_str(p: TransparentStr); //~ ERROR: uses type `str`
  71     pub fn transparent_fn(p: TransparentBadFn); //~ ERROR: uses type `Box<u32>`
  72     pub fn raw_array(arr: [u8; 8]); //~ ERROR: uses type `[u8; 8]`
  73
  74     pub fn no_niche_a(a: Option<UnsafeCell<extern fn()>>);
  75     //~^ ERROR: uses type `Option<UnsafeCell<extern "C" fn()>>`
  76     pub fn no_niche_b(b: Option<UnsafeCell<&i32>>);
  77     //~^ ERROR: uses type `Option<UnsafeCell<&i32>>`
  78
  79     pub static static_u128_type: u128; //~ ERROR: uses type `u128`
  80     pub static static_u128_array_type: [u128; 16]; //~ ERROR: uses type `u128`
  81
  82     pub fn good3(fptr: Option<extern "C" fn()>);
  83     pub fn good4(aptr: &[u8; 4 as usize]);
  84     pub fn good5(s: StructWithProjection);
  85     pub fn good6(s: StructWithProjectionAndLifetime);
  86     pub fn good7(fptr: extern "C" fn() -> ());
  87     pub fn good8(fptr: extern "C" fn() -> !);
  88     pub fn good9() -> ();
  89     pub fn good10() -> CVoidRet;
  90     pub fn good11(size: isize);
  91     pub fn good12(size: usize);
  92     pub fn good13(n: TransparentInt);
  93     pub fn good14(p: TransparentRef);
  94     pub fn good15(p: TransparentLifetime);
  95     pub fn good16(p: TransparentUnit<ZeroSize>);
  96     pub fn good17(p: TransparentCustomZst);
  97     #[allow(improper_ctypes)]
  98     pub fn good18(_: &String);
  99     pub fn good20(arr: *const [u8; 8]);
 100     pub static good21: [u8; 8];
 101
 102 }
 103
 104 #[allow(improper_ctypes)]
 105 extern "C" {
 106     pub fn good19(_: &String);
 107 }
 108
 109 #[cfg(not(target_arch = "wasm32"))]
 110 extern "C" {
 111     pub fn good1(size: *const libc::c_int);
 112     pub fn good2(size: *const libc::c_uint);
 113 }
 114
 115 fn main() {
 116 }