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Work around a libclang bug / limitation.
For references, libclang returns the size and align of the pointee. This actually matches how C++'s sizeof() and alignof() works, for some reason, though in this case we really want to know the pointer's layout. Anyhow, we know the target pointer size, so manually handle this case. Filed https://bugs.llvm.org/show_bug.cgi?id=40975 for this.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| /* automatically generated by rust-bindgen */ | ||
|
|
||
| #![allow( | ||
| dead_code, | ||
| non_snake_case, | ||
| non_camel_case_types, | ||
| non_upper_case_globals | ||
| )] | ||
|
|
||
| #[repr(C)] | ||
| #[derive(Debug, Copy, Clone)] | ||
| pub struct Foo { | ||
| _unused: [u8; 0], | ||
| } | ||
| #[repr(C)] | ||
| #[derive(Debug, Copy, Clone)] | ||
| pub struct Bar { | ||
| pub f: *const Foo, | ||
| pub m: ::std::os::raw::c_uint, | ||
| } | ||
| #[test] | ||
| fn bindgen_test_layout_Bar() { | ||
| assert_eq!( | ||
| ::std::mem::size_of::<Bar>(), | ||
| 16usize, | ||
| concat!("Size of: ", stringify!(Bar)) | ||
| ); | ||
| assert_eq!( | ||
| ::std::mem::align_of::<Bar>(), | ||
| 8usize, | ||
| concat!("Alignment of ", stringify!(Bar)) | ||
| ); | ||
| assert_eq!( | ||
| unsafe { &(*(::std::ptr::null::<Bar>())).f as *const _ as usize }, | ||
| 0usize, | ||
| concat!("Offset of field: ", stringify!(Bar), "::", stringify!(f)) | ||
| ); | ||
| assert_eq!( | ||
| unsafe { &(*(::std::ptr::null::<Bar>())).m as *const _ as usize }, | ||
| 8usize, | ||
| concat!("Offset of field: ", stringify!(Bar), "::", stringify!(m)) | ||
| ); | ||
| } | ||
| impl Default for Bar { | ||
| fn default() -> Self { | ||
| unsafe { ::std::mem::zeroed() } | ||
| } | ||
| } | ||
| #[repr(C)] | ||
| #[derive(Debug, Copy, Clone)] | ||
| pub struct Baz { | ||
| pub f: *mut Foo, | ||
| pub m: ::std::os::raw::c_uint, | ||
| } | ||
| #[test] | ||
| fn bindgen_test_layout_Baz() { | ||
| assert_eq!( | ||
| ::std::mem::size_of::<Baz>(), | ||
| 16usize, | ||
| concat!("Size of: ", stringify!(Baz)) | ||
| ); | ||
| assert_eq!( | ||
| ::std::mem::align_of::<Baz>(), | ||
| 8usize, | ||
| concat!("Alignment of ", stringify!(Baz)) | ||
| ); | ||
| assert_eq!( | ||
| unsafe { &(*(::std::ptr::null::<Baz>())).f as *const _ as usize }, | ||
| 0usize, | ||
| concat!("Offset of field: ", stringify!(Baz), "::", stringify!(f)) | ||
| ); | ||
| assert_eq!( | ||
| unsafe { &(*(::std::ptr::null::<Baz>())).m as *const _ as usize }, | ||
| 8usize, | ||
| concat!("Offset of field: ", stringify!(Baz), "::", stringify!(m)) | ||
| ); | ||
| } | ||
| impl Default for Baz { | ||
| fn default() -> Self { | ||
| unsafe { ::std::mem::zeroed() } | ||
| } | ||
| } | ||
| #[repr(C)] | ||
| #[derive(Debug, Copy, Clone)] | ||
| pub struct Tar { | ||
| pub f: *const Foo, | ||
| pub m: ::std::os::raw::c_uint, | ||
| } | ||
| #[test] | ||
| fn bindgen_test_layout_Tar() { | ||
| assert_eq!( | ||
| ::std::mem::size_of::<Tar>(), | ||
| 16usize, | ||
| concat!("Size of: ", stringify!(Tar)) | ||
| ); | ||
| assert_eq!( | ||
| ::std::mem::align_of::<Tar>(), | ||
| 8usize, | ||
| concat!("Alignment of ", stringify!(Tar)) | ||
| ); | ||
| assert_eq!( | ||
| unsafe { &(*(::std::ptr::null::<Tar>())).f as *const _ as usize }, | ||
| 0usize, | ||
| concat!("Offset of field: ", stringify!(Tar), "::", stringify!(f)) | ||
| ); | ||
| assert_eq!( | ||
| unsafe { &(*(::std::ptr::null::<Tar>())).m as *const _ as usize }, | ||
| 8usize, | ||
| concat!("Offset of field: ", stringify!(Tar), "::", stringify!(m)) | ||
| ); | ||
| } | ||
| impl Default for Tar { | ||
| fn default() -> Self { | ||
| unsafe { ::std::mem::zeroed() } | ||
| } | ||
| } | ||
| #[repr(C)] | ||
| #[derive(Debug, Copy, Clone)] | ||
| pub struct Taz { | ||
| pub f: *mut Foo, | ||
| pub m: ::std::os::raw::c_uint, | ||
| } | ||
| #[test] | ||
| fn bindgen_test_layout_Taz() { | ||
| assert_eq!( | ||
| ::std::mem::size_of::<Taz>(), | ||
| 16usize, | ||
| concat!("Size of: ", stringify!(Taz)) | ||
| ); | ||
| assert_eq!( | ||
| ::std::mem::align_of::<Taz>(), | ||
| 8usize, | ||
| concat!("Alignment of ", stringify!(Taz)) | ||
| ); | ||
| assert_eq!( | ||
| unsafe { &(*(::std::ptr::null::<Taz>())).f as *const _ as usize }, | ||
| 0usize, | ||
| concat!("Offset of field: ", stringify!(Taz), "::", stringify!(f)) | ||
| ); | ||
| assert_eq!( | ||
| unsafe { &(*(::std::ptr::null::<Taz>())).m as *const _ as usize }, | ||
| 8usize, | ||
| concat!("Offset of field: ", stringify!(Taz), "::", stringify!(m)) | ||
| ); | ||
| } | ||
| impl Default for Taz { | ||
| fn default() -> Self { | ||
| unsafe { ::std::mem::zeroed() } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| struct Foo; | ||
|
|
||
| struct Bar { | ||
| const Foo& f; | ||
| unsigned m; | ||
| }; | ||
|
|
||
| struct Baz { | ||
| Foo& f; | ||
| unsigned m; | ||
| }; | ||
|
|
||
| struct Tar { | ||
| const Foo&& f; | ||
| unsigned m; | ||
| }; | ||
|
|
||
| struct Taz { | ||
| Foo&& f; | ||
| unsigned m; | ||
| }; |