rust-clippy/tests/ui/no_mangle_with_rust_abi.rs

//@no-rustfix: overlapping suggestions
#![allow(unused)]
#![warn(clippy::no_mangle_with_rust_abi)]

#[unsafe(no_mangle)]
fn rust_abi_fn_one(arg_one: u32, arg_two: usize) {}
//~^ ERROR: `#[unsafe(no_mangle)]` set on a function with the default (`Rust`) ABI
//~| NOTE: `-D clippy::no-mangle-with-rust-abi` implied by `-D warnings`

#[unsafe(no_mangle)]
pub fn rust_abi_fn_two(arg_one: u32, arg_two: usize) {}
//~^ ERROR: `#[unsafe(no_mangle)]` set on a function with the default (`Rust`) ABI

/// # Safety
/// This function shouldn't be called unless the horsemen are ready
#[unsafe(no_mangle)]
pub unsafe fn rust_abi_fn_three(arg_one: u32, arg_two: usize) {}
//~^ ERROR: `#[unsafe(no_mangle)]` set on a function with the default (`Rust`) ABI

/// # Safety
/// This function shouldn't be called unless the horsemen are ready
#[unsafe(no_mangle)]
unsafe fn rust_abi_fn_four(arg_one: u32, arg_two: usize) {}
//~^ ERROR: `#[unsafe(no_mangle)]` set on a function with the default (`Rust`) ABI

#[unsafe(no_mangle)]
fn rust_abi_multiline_function_really_long_name_to_overflow_args_to_multiple_lines(
    //~^ ERROR: `#[unsafe(no_mangle)]` set on a function with the default (`Rust`) ABI
    arg_one: u32,
    arg_two: usize,
) -> u32 {
    0
}

// Must not run on functions that explicitly opt in to using the Rust ABI with `extern "Rust"`
#[unsafe(no_mangle)]
#[rustfmt::skip]
extern "Rust" fn rust_abi_fn_explicit_opt_in(arg_one: u32, arg_two: usize) {}

fn rust_abi_fn_again(arg_one: u32, arg_two: usize) {}

#[unsafe(no_mangle)]
extern "C" fn c_abi_fn(arg_one: u32, arg_two: usize) {}

extern "C" fn c_abi_fn_again(arg_one: u32, arg_two: usize) {}

extern "C" {
    fn c_abi_in_block(arg_one: u32, arg_two: usize);
}

fn main() {
    // test code goes here
}