Static MISSING_ABI

pub static MISSING_ABI: &'static Lint

The missing_abi lint detects cases where the ABI is omitted from extern declarations.

Example

#![deny(missing_abi)]

extern fn foo() {}

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Explanation

For historic reasons, Rust implicitly selects C as the default ABI for extern declarations. Other ABIs like C-unwind and system have been added since then, and especially with their addition seeing the ABI easily makes code review easier.