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//! All SI base units and more constants.

#![allow(non_upper_case_globals)]

/// Helper macro to generate two constants for every unit,
/// a unit const, and a value const in two different modules.
macro_rules! units_impl {
    ($(
        $(#[$attr:meta])*
        $name:ident => $unit:expr
    ),*$(,)?) => {
        /// All SI base units and more constants.
        pub mod units {
            use crate::Unit;

            const NONE: Unit = Unit {
                A: 0,
                K: 0,
                cd: 0,
                kg: 0,
                m: 0,
                mol: 0,
                s: 0,
            };

            $(
                $(#[$attr])*
                pub const $name: Unit = $unit;
            )*
        }

        /// All SI base units but wrapped in [`Quantity`](crate::Quantity`)
        /// with value `1.0`.
        pub mod values {
            use crate::Quantity;

            $(
                $(#[$attr])*
                pub const $name: Quantity<{ super::units::$name }> = Quantity::new(1.0);
            )*
        }
    };
}

units_impl! {
    /// Time in seconds
    s => Unit { s: 1, ..NONE },
    /// Length in metre
    m => Unit { m: 1, ..NONE },
    /// Mass in kilogram
    kg => Unit { kg: 1, ..NONE },
    /// Electric current in ampere
    A => Unit { A: 1, ..NONE },
    /// Temperature in kelvin
    K => Unit { K: 1, ..NONE },
    /// Amount of substance in mole
    mol => Unit { mol: 1, ..NONE },
    /// Luminous intensity in candela
    cd => Unit { cd: 1, ..NONE },
}