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Derive Debug is not generated for structs with large array fields (len() > 32) (need to add new rustc target) #1977
Description
Hi! If my struct contains large arrays, then Debug is not being generated. However if I add Debug manually, it compiles and runs just fine.
Input C/C++ Header
typedef struct {
char f[33];
} A;Bindgen Invocation
$ bindgen input.h
Actual Results
/* automatically generated by rust-bindgen 0.56.0 */
#[repr(C)]
#[derive(Copy, Clone)]
pub struct A {
pub f: [::std::os::raw::c_char; 33usize],
}
...Expected Results
#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct A {
pub f: [::std::os::raw::c_char; 33usize],
}Reacted by Jonas Platte
Activity
jplatte commentedon Jan 26, 2021
Arrays with more than 32 elements only implement
Debugsince 1.47.jplatte commentedon Jan 26, 2021
The latest
--rust-targetsupported being1.47apart fromnightly, I guess this won't be supported even with--rust-target nightly.emilio commentedon Jan 29, 2021
If Rust supports this now we should add a new rustc version to the code and restrict the limitations to older versions of rust.
[-]Derive `Debug` is not generated for structs with large array fields (len() > 32)[/-][+]Derive `Debug` is not generated for structs with large array fields (len() > 32) (need to add new rustc target)[/+]jplatte commentedon Jan 29, 2021
I've already done the first part, I'll try to get to the latter soon or post a WIP PR with some notes if I don't find the time to finish it (or somebody else is eager to work on this 🙂).
Let Rust derive everything but Default for large arrays in 1.47 and l…