decimal-scaled 0.2.2

Const-generic base-10 fixed-point decimals (D9/D18/D38/D76/D153/D307) with integer-only transcendentals correctly rounded to within 0.5 ULP — exact at the type's last representable place. Deterministic across every platform; no_std-friendly.
Documentation 
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//! Coverage for the default-implemented methods on the `Decimal`
//! trait: `is_zero`, `is_one`, and `sum`. These are reachable only
//! through trait dispatch (the type's inherent `is_zero` etc. shadow
//! them), so tests must call them with explicit fully-qualified syntax.

use decimal_scaled::{D38s12, Decimal};

#[test]
fn decimal_trait_is_zero_default_impl() {
    assert!(<D38s12 as Decimal>::is_zero(D38s12::ZERO));
    assert!(!<D38s12 as Decimal>::is_zero(D38s12::ONE));
}

#[test]
fn decimal_trait_is_one_default_impl() {
    assert!(<D38s12 as Decimal>::is_one(D38s12::ONE));
    assert!(!<D38s12 as Decimal>::is_one(D38s12::ZERO));
}

#[test]
fn decimal_trait_sum_default_impl() {
    let vals = [D38s12::from_int(1), D38s12::from_int(2), D38s12::from_int(3)];
    let s: D38s12 = <D38s12 as Decimal>::sum(vals.iter().copied());
    assert_eq!(s, D38s12::from_int(6));
    // Empty iter → ZERO
    let s: D38s12 = <D38s12 as Decimal>::sum(core::iter::empty());
    assert_eq!(s, D38s12::ZERO);
}