numbat 1.23.0

A statically typed programming language for scientific computations with first class support for physical dimensions and units.
Documentation 
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//! Some macros for writing FFI functions

macro_rules! arg {
    ($args:ident) => {
        $args.pop_front().unwrap().value
    };
}
pub(crate) use arg;

macro_rules! quantity_arg {
    ($args:ident) => {
        arg!($args).unsafe_as_quantity()
    };
}
pub(crate) use quantity_arg;

macro_rules! scalar_arg {
    ($args:ident) => {
        quantity_arg!($args).as_scalar().unwrap()
    };
}
pub(crate) use scalar_arg;

macro_rules! list_arg {
    ($args:ident) => {
        arg!($args).unsafe_as_list()
    };
}
pub(crate) use list_arg;

macro_rules! string_arg {
    ($args:ident) => {
        arg!($args).unsafe_as_string()
    };
}
pub(crate) use string_arg;

macro_rules! datetime_arg {
    ($args:ident) => {
        arg!($args).unsafe_as_datetime()
    };
}
pub(crate) use datetime_arg;

macro_rules! return_scalar {
    ( $value:expr) => {
        Ok(Value::Quantity(Quantity::from_scalar($value)))
    };
}
pub(crate) use return_scalar;

macro_rules! return_quantity {
    ($value:expr, $unit:expr) => {
        Ok(Value::Quantity(Quantity::new_f64($value, $unit)))
    };
}
pub(crate) use return_quantity;

macro_rules! return_boolean {
    ($value:expr) => {
        Ok(Value::Boolean($value))
    };
}
pub(crate) use return_boolean;

macro_rules! return_list {
    ($value:expr) => {
        Ok(Value::List($value.into()))
    };
}
pub(crate) use return_list;

macro_rules! return_string {
    (owned = $value:expr) => {
        Ok(Value::String($value))
    };
    (borrowed = $value:expr) => {
        Ok(Value::String(::compact_str::CompactString::new($value)))
    };
    (from = $value:expr) => {
        Ok(Value::String(
            ::compact_str::ToCompactString::to_compact_string($value),
        ))
    };
}
pub(crate) use return_string;

macro_rules! return_datetime {
    ($value:expr) => {
        Ok(Value::DateTime($value))
    };
}
pub(crate) use return_datetime;