lint ImproperCTypes: add test to cover all ty_kinds

rust-lang · Dec 23, 2024 · 5764b36 · 5764b36
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diff --git a/tests/ui/lint/lint-ctypes-tykind-fuzz.rs b/tests/ui/lint/lint-ctypes-tykind-fuzz.rs
@@ -0,0 +1,311 @@
+// Trying to cover as many ty_kinds as possible in the code for ImproperCTypes lint
+//@ edition:2018
+
+#![allow(dead_code,unused_variables)]
+#![deny(improper_ctypes,improper_ctypes_definitions)]
+
+// we want ALL the ty_kinds, including the feature-gated ones
+#![feature(extern_types)]
+#![feature(never_type)]
+#![feature(inherent_associated_types)] //~ WARN: is incomplete
+#![feature(async_trait_bounds)]
+#![feature(pattern_types, rustc_attrs)]
+#![feature(pattern_type_macro)]
+
+// ty_kinds not found so far:
+// Placeholder, Bound, Infer, Error,
+// Alias<Weak|Inherent>
+// FnDef, Closure, Coroutine, ClosureCoroutine, CoroutineWitness,
+
+use std::ptr::from_ref;
+use std::ptr::NonNull;
+use std::mem::{MaybeUninit, size_of};
+use std::num::NonZero;
+use std::pat::pattern_type;
+
+#[repr(C)]
+struct SomeStruct{
+  a: u8,
+  b: i32,
+}
+impl SomeStruct{
+  extern "C" fn klol(
+      // Ref[Struct]
+      &self
+  ){}
+}
+
+#[repr(C)]
+#[derive(Clone,Copy)]
+struct TemplateStruct<T> where T: std::ops::Add+Copy {
+   one: T,
+   two: T,
+}
+impl<T: std::ops::Add+Copy> TemplateStruct<T> {
+    type Out = <T as std::ops::Add>::Output;
+}
+
+extern "C" fn tstruct_sum<T: std::ops::Add+Copy>(
+    // Ref[Struct]
+    slf: &TemplateStruct<T>
+    // Alias<Projection>   ...not Inherent. dangit
+) -> TemplateStruct<T>::Out {
+    slf.one + slf.two
+}
+
+#[repr(C)]
+union SomeUnion{
+   sz: u8,
+   us: i8,
+}
+#[repr(C)]
+enum SomeEnum{
+   Everything=42,
+   NotAU8=256,
+   SomePrimeNumber=23,
+}
+
+pub trait TimesTwo: std::ops::Add<Self> + Sized + Clone
+   where for<'a> &'a Self: std::ops::Add<&'a Self>,
+         *const Self: std::ops::Add<*const Self>,
+         Box<Self>: std::ops::Add<Box<Self>>,
+{
+   extern "C" fn t2_own(
+       // Param
+       self
+       // Alias<Projection>
+   ) -> <Self as std::ops::Add<Self>>::Output {
+       self.clone() + self
+   }
+   // it ICEs (https://github.com/rust-lang/rust/issues/134587) :(
+   //extern "C" fn t2_ptr(
+   //    // Ref[Param]
+   //    slf: *const Self
+   //    // Alias<Projection>
+   //) -> <*const Self as std::ops::Add<*const Self>>::Output {
+   //    slf + slf
+   //}
+   extern "C" fn t2_box(
+       // Box[Param]
+       self: Box<Self>
+       // Alias<Projection>
+   ) -> <Box<Self> as std::ops::Add<Box<Self>>>::Output {
+       self.clone() + self
+   }
+   extern "C" fn t2_ref(
+       // Ref[Param]
+       &self
+       // Alias<Projection>
+       ) -> <&Self as std::ops::Add<&Self>>::Output {
+       self + self
+   }
+}
+
+extern "C" {type ExtType;}
+
+#[repr(C)]
+pub struct StructWithDyn(dyn std::fmt::Debug);
+
+extern "C" {
+  // variadic args aren't listed as args in a way that allows type checking.
+  // this is fine (TM)
+  fn variadic_function(e: ...);
+}
+
+extern "C" fn all_ty_kinds<'a,const N:usize,T>(
+  // UInt, Int, Float, Bool
+  u:u8, i:i8, f:f64, b:bool,
+  // Struct
+  s:String, //~ ERROR: uses type `String`
+  // Ref[Str]
+  s2:&str, //~ ERROR: uses type `&str`
+  // Char
+  c: char,  //~ ERROR: uses type `char`
+  // Ref[Slice]
+  s3:&[u8], //~ ERROR: uses type `&[u8]`
+  // Array (this gets caught outside of the code we want to test)
+  s4:[u8;N], //~ ERROR: uses type `[u8; N]`
+  // Tuple
+  p:(u8, u8), //~ ERROR: uses type `(u8, u8)`
+  // also Tuple
+  (p2, p3):(u8, u8), //~ ERROR: uses type `(u8, u8)`
+  // Pat
+  nz: pattern_type!(u32 is 1..), //~ ERROR: uses type `(u32) is 1..=`
+  // Struct
+  SomeStruct{b:p4,..}: SomeStruct,
+  // Union
+  u2: SomeUnion,
+  // Enum,
+  e: SomeEnum,
+  // Param
+  d: impl Clone,
+  // Param
+  t: T,
+  // Ptr[Foreign]
+  e2: *mut ExtType,
+  // Ref[Struct]
+  e3: &StructWithDyn, //~ ERROR: uses type `&StructWithDyn`
+  // Never
+  x:!,
+  //r1: &u8, r2: *const u8, r3: Box<u8>,
+  // FnPtr
+  f2: fn(u8)->u8, //~ ERROR: uses type `fn(u8) -> u8`
+  // Ref[Dynamic]
+  f3: &'a dyn Fn(u8)->u8, //~ ERROR: uses type `&dyn Fn(u8) -> u8`
+  // Ref[Dynamic]
+  d2: &dyn std::cmp::PartialOrd<u8>, //~ ERROR: uses type `&dyn PartialOrd<u8>`
+  // Param,
+  a: impl async Fn(u8)->u8,  //FIXME: eventually, be able to peer into type params
+  // Alias<Opaque> (this gets caught outside of the code we want to test)
+) -> impl std::fmt::Debug { //~ ERROR: uses type `impl Debug`
+    3_usize
+}
+
+extern "C" {
+fn all_ty_kinds_in_ptr(
+  // Ptr[UInt], Ptr[Int], Ptr[Float], Ptr[Bool]
+  u: *const u8, i: *const i8, f: *const f64, b: *const bool,
+  // Ptr[Struct]
+  s: *const String,  //~ ERROR: uses type `String`
+  // Ptr[Str]
+  s2: *const str, //~ ERROR: uses type `*const str`
+  // Ptr[Char]
+  c: *const  char, //~ ERROR: uses type `char`
+  // Ptr[Slice]
+  s3: *const [u8], //~ ERROR: uses type `*const [u8]`
+  // deactivated here, because this is a function *declaration* (param N unacceptable)
+  // s4: *const [u8;N],
+  // Ptr[Tuple]
+  p: *const (u8,u8), //~ ERROR: uses type `(u8, u8)`
+  // deactivated here, because this is a function *declaration* (pattern unacceptable)
+  // (p2, p3):(*const u8, *const u8),
+  // Pat
+  nz: *const pattern_type!(u32 is 1..), //~ ERROR: uses type `(u32) is 1..=`
+  // deactivated here, because this is a function *declaration* (pattern unacceptable)
+  //SomeStruct{b: ref p4,..}: & SomeStruct,
+  // Ptr[Union]
+  u2: *const SomeUnion,
+  // Ptr[Enum],
+  e: *const SomeEnum,
+  // deactivated here, because this is a function *declaration* (impl type unacceptable)
+  //d: *const impl Clone,
+  // deactivated here, because this is a function *declaration* (type param unacceptable)
+  //t: *const T,
+  // Ptr[Foreign]
+  e2: *mut ExtType,
+  // Ptr[Struct]
+  e3: *const StructWithDyn, //~ ERROR: uses type `*const StructWithDyn`
+  // Ptr[Never]
+  x: *const !,
+  //r1: &u8, r2: *const u8, r3: Box<u8>,
+  // Ptr[FnPtr]
+  f2: *const fn(u8)->u8, //~ ERROR: uses type `fn(u8) -> u8`
+  // Ptr[Dynamic]
+  f3: *const dyn Fn(u8)->u8, //~ ERROR: uses type `*const dyn Fn(u8) -> u8`
+  // Ptr[Dynamic]
+  d2: *const dyn std::cmp::PartialOrd<u8>, //~ ERROR: uses type `*const dyn PartialOrd<u8>`
+  // deactivated here, because this is a function *declaration*  (impl type unacceptable)
+  //a: *const impl async Fn(u8)->u8,
+  // Alias<Opaque> (this gets caught outside of the code we want to test)
+) -> *const dyn std::fmt::Debug; //~ ERROR: uses type `*const dyn Debug`
+}
+
+extern "C" fn all_ty_kinds_in_ref<'a, const N:usize,T>(
+  // Ref[UInt], Ref[Int], Ref[Float], Ref[Bool]
+  u: &u8, i: &'a i8, f: &f64, b: &bool,
+  // Ref[Struct]
+  s: &String,
+  // Ref[Str]
+  s2: &str, //~ ERROR: uses type `&str`
+  // Ref[Char]
+  c: &char,
+  // Ref[Slice]
+  s3: &[u8], //~ ERROR: uses type `&[u8]`
+  // Ref[Array] (this gets caught outside of the code we want to test)
+  s4: &[u8;N],
+  // Ref[Tuple]
+  p: &(u8, u8),
+  // also Tuple
+  (p2, p3):(&u8, &u8), //~ ERROR: uses type `(&u8, &u8)`
+  // Pat
+  nz: &pattern_type!(u32 is 1..),
+  // Ref[Struct]
+  SomeStruct{b: ref p4,..}: &SomeStruct,
+  // Ref[Union]
+  u2:  &SomeUnion,
+  // Ref[Enum],
+  e:  &SomeEnum,
+  // Ref[Param]
+  d:  &impl Clone,
+  // Ref[Param]
+  t:  &T,
+  // Ref[Foreign]
+  e2: &ExtType,
+  // Ref[Struct]
+  e3: &StructWithDyn, //~ ERROR: uses type `&StructWithDyn`
+  // Ref[Never]
+  x: &!,
+  //r1: &u8, r2:  &u8, r3: Box<u8>,
+  // Ref[FnPtr]
+  f2: &fn(u8)->u8,
+  // Ref[Dynamic]
+  f3: &dyn Fn(u8)->u8, //~ ERROR: uses type `&dyn Fn(u8) -> u8`
+  // Ref[Dynamic]
+  d2: &dyn std::cmp::PartialOrd<u8>, //~ ERROR: uses type `&dyn PartialOrd<u8>`
+  // Ref[Param],
+  a: &impl async Fn(u8)->u8,
+  // Ref[Dynamic] (this gets caught outside of the code we want to test)
+) -> &'a dyn std::fmt::Debug { //~ ERROR: uses type `&dyn Debug`
+    i
+}
+
+extern "C" fn all_ty_kinds_in_box<const N:usize,T>(
+  // Box[UInt], Box[Int], Box[Float], Box[Bool]
+  u: Box<u8>, i: Box<i8>, f: Box<f64>, b: Box<bool>,
+  // Box[Struct]
+  s: Box<String>,
+  // Box[Str]
+  s2: Box<str>, //~ ERROR: uses type `Box<str>`
+  // Box[Char]
+  c: Box<char>,
+  // Box[Slice]
+  s3: Box<[u8]>, //~ ERROR: uses type `Box<[u8]>`
+  // Box[Array] (this gets caught outside of the code we want to test)
+  s4: Box<[u8;N]>,
+  // Box[Tuple]
+  p: Box<(u8,u8)>,
+  // also Tuple
+  (p2,p3):(Box<u8>, Box<u8>), //~ ERROR: uses type `(Box<u8>, Box<u8>)`
+  // Pat
+  nz: Box<pattern_type!(u32 is 1..)>,
+  // Ref[Struct]
+  SomeStruct{b: ref p4,..}: &SomeStruct,
+  // Box[Union]
+  u2:  Box<SomeUnion>,
+  // Box[Enum],
+  e:  Box<SomeEnum>,
+  // Box[Param]
+  d:  Box<impl Clone>,
+  // Box[Param]
+  t:  Box<T>,
+  // Box[Foreign]
+  e2: Box<ExtType>,
+  // Box[Struct]
+  e3: Box<StructWithDyn>, //~ ERROR: uses type `Box<StructWithDyn>`
+  // Box[Never]
+  x: Box<!>,
+  //r1: Box<u8, r2:  Box<u8, r3: Box<u8>,
+  // Box[FnPtr]
+  f2: Box<fn(u8)->u8>,
+  // Box[Dynamic]
+  f3: Box<dyn Fn(u8)->u8>,  //~ ERROR: uses type `Box<dyn Fn(u8) -> u8>`
+  // Box[Dynamic]
+  d2: Box<dyn std::cmp::PartialOrd<u8>>, //~ ERROR: uses type `Box<dyn PartialOrd<u8>>`
+  // Box[Param],
+  a: Box<impl async Fn(u8)->u8>,
+  // Box[Dynamic] (this gets caught outside of the code we want to test)
+) -> Box<dyn std::fmt::Debug> { //~ ERROR: uses type `Box<dyn Debug>`
+    i
+}
+
+fn main() {}