rust/tests/ui/floating_point_abs.rs

#![feature(const_fn_floating_point_arithmetic)]
#![warn(clippy::suboptimal_flops)]

/// Allow suboptimal ops in constant context
pub const fn in_const_context(num: f64) -> f64 {
    if num >= 0.0 { num } else { -num }
}

struct A {
    a: f64,
    b: f64,
}

fn fake_abs1(num: f64) -> f64 {
    if num >= 0.0 { num } else { -num }
}

fn fake_abs2(num: f64) -> f64 {
    if 0.0 < num { num } else { -num }
}

fn fake_abs3(a: A) -> f64 {
    if a.a > 0.0 { a.a } else { -a.a }
}

fn fake_abs4(num: f64) -> f64 {
    if 0.0 >= num { -num } else { num }
}

fn fake_abs5(a: A) -> f64 {
    if a.a < 0.0 { -a.a } else { a.a }
}

fn fake_nabs1(num: f64) -> f64 {
    if num < 0.0 { num } else { -num }
}

fn fake_nabs2(num: f64) -> f64 {
    if 0.0 >= num { num } else { -num }
}

fn fake_nabs3(a: A) -> A {
    A {
        a: if a.a >= 0.0 { -a.a } else { a.a },
        b: a.b,
    }
}

fn not_fake_abs1(num: f64) -> f64 {
    if num > 0.0 { num } else { -num - 1f64 }
}

fn not_fake_abs2(num: f64) -> f64 {
    if num > 0.0 { num + 1.0 } else { -(num + 1.0) }
}

fn not_fake_abs3(num1: f64, num2: f64) -> f64 {
    if num1 > 0.0 { num2 } else { -num2 }
}

fn not_fake_abs4(a: A) -> f64 {
    if a.a > 0.0 { a.b } else { -a.b }
}

fn not_fake_abs5(a: A) -> f64 {
    if a.a > 0.0 { a.a } else { -a.b }
}

fn main() {
    fake_abs1(5.0);
    fake_abs2(5.0);
    fake_abs3(A { a: 5.0, b: 5.0 });
    fake_abs4(5.0);
    fake_abs5(A { a: 5.0, b: 5.0 });
    fake_nabs1(5.0);
    fake_nabs2(5.0);
    fake_nabs3(A { a: 5.0, b: 5.0 });
    not_fake_abs1(5.0);
    not_fake_abs2(5.0);
    not_fake_abs3(5.0, 5.0);
    not_fake_abs4(A { a: 5.0, b: 5.0 });
    not_fake_abs5(A { a: 5.0, b: 5.0 });
}