rune 0.14.2

The Rune Language, an embeddable dynamic programming language for Rust.
Documentation 
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macro_rules! inline_macros {
    ($path:path) => {
        $path! {
            /// Coerce into [`Ordering`].
            Ordering(Ordering),
            as_ordering,
            as_ordering_mut,
        }

        $path! {
            /// Coerce into [`bool`].
            Bool(bool),
            as_bool,
            as_bool_mut,
        }

        $path! {
            /// Coerce into [`char`].
            Char(char),
            as_char,
            as_char_mut,
        }

        $path! {
            /// Coerce into [`u64`] unsigned integer.
            Unsigned(u64),
            as_unsigned,
            as_unsigned_mut,
        }

        $path! {
            /// Coerce into [`i64`] signed integer.
            Signed(i64),
            as_signed,
            as_signed_mut,
        }

        $path! {
            /// Coerce into [`f64`] float.
            Float(f64),
            as_float,
            as_float_mut,
        }

        $path! {
            /// Coerce into [`Type`].
            Type(Type),
            as_type,
            as_type_mut,
        }
    };
}

macro_rules! range_iter {
    ($range:ident, $name:ident<$ty:ident> $(, { $($item:tt)* })?) => {
        #[derive(Any)]
        #[rune(item = ::std::ops)]
        pub(crate) struct $name<$ty>
        where
            $ty: 'static + $crate::alloc::clone::TryClone,
            $ty: $crate::compile::Named,
            $ty: $crate::runtime::FromValue + $crate::runtime::ToValue,
            $ty: $crate::runtime::MaybeTypeOf + $crate::runtime::TypeOf,
        {
            iter: core::ops::$range<$ty>,
        }

        impl<$ty> $name<$ty>
        where
            $ty: 'static + $crate::alloc::clone::TryClone,
            $ty: $crate::compile::Named,
            $ty: $crate::runtime::FromValue + $crate::runtime::ToValue,
            $ty: $crate::runtime::MaybeTypeOf + $crate::runtime::TypeOf,
            core::ops::$range<$ty>: Iterator<Item = $ty>,
        {
            #[inline]
            pub(crate) fn new(iter: core::ops::$range<$ty>) -> Self {
                Self { iter }
            }

            #[rune::function(instance, keep, protocol = NEXT)]
            #[inline]
            pub(crate) fn next(&mut self) -> Option<$ty> {
                self.iter.next()
            }

            $($($item)*)*
        }

        impl<$ty> Iterator for $name<$ty>
        where
            $ty: 'static + $crate::alloc::clone::TryClone,
            $ty: $crate::compile::Named,
            $ty: $crate::runtime::FromValue + $crate::runtime::ToValue,
            $ty: $crate::runtime::MaybeTypeOf + $crate::runtime::TypeOf,
            core::ops::$range<$ty>: Iterator<Item = $ty>,
        {
            type Item = $ty;

            #[inline]
            fn next(&mut self) -> Option<Self::Item> {
                self.iter.next()
            }
        }
    };
}

macro_rules! double_ended_range_iter {
    ($range:ident, $name:ident<$ty:ident> $(, { $($item:tt)* })?) => {
        range_iter!($range, $name<$ty> $(, { $($item)* })*);

        impl<T> $name<T>
        where
            T: 'static + $crate::alloc::clone::TryClone,
            T: $crate::compile::Named,
            T: $crate::runtime::FromValue + $crate::runtime::ToValue,
            T: $crate::runtime::MaybeTypeOf + $crate::runtime::TypeOf,
            core::ops::$range<T>: DoubleEndedIterator<Item = T>,
        {
            #[rune::function(instance, keep, protocol = NEXT_BACK)]
            #[inline]
            pub(crate) fn next_back(&mut self) -> Option<T> {
                self.iter.next_back()
            }
        }

        impl<T> DoubleEndedIterator for $name<T>
        where
            T: 'static + $crate::alloc::clone::TryClone,
            T: $crate::compile::Named,
            T: $crate::runtime::FromValue + $crate::runtime::ToValue,
            T: $crate::runtime::MaybeTypeOf + $crate::runtime::TypeOf,
            core::ops::$range<T>: DoubleEndedIterator<Item = T>,
        {
            #[inline]
            fn next_back(&mut self) -> Option<Self::Item> {
                self.iter.next_back()
            }
        }
    };
}