Function core::intrinsics::try

pub unsafe extern "rust-intrinsic" fn try(
    f: fn(_: *mut u8), 
    data: *mut u8, 
    local_ptr: *mut u8
) -> i32

🔬 This is a nightly-only experimental API. (core_intrinsics #0)

intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library

Rust's "try catch" construct which invokes the function pointer f with the data pointer data.

The third pointer is a target-specific data pointer which is filled in with the specifics of the exception that occurred. For examples on Unix platforms this is a *mut *mut T which is filled in by the compiler and on MSVC it's *mut [usize; 2]. For more information see the compiler's source as well as std's catch implementation.