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clippy 0.0.155 - Docs.rs
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clippy 0.0.155

A bunch of helpful lints to avoid common pitfalls in Rust
Documentation 
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#![feature(plugin)]
#![plugin(clippy)]

#![warn(unit_cmp)]
#![allow(no_effect, unnecessary_operation)]

#[derive(PartialEq)]
pub struct ContainsUnit(()); // should be fine

fn main() {
    // this is fine
    if true == false {
    }

    // this warns
    if { true; } == { false; } {
    }

    if { true; } > { false; } {
    }
}