compris 0.0.11

Composite Primitive Schema (CPS) for Rust
Documentation 
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/// Traverse a variant by calling [Variant::get](super::super::Variant::get) recursively.
///
/// The first argument is the starting [Variant](super::super::Variant). The following
/// arguments are a sequence of keys, which will be tried one at a time. Any non-collection or
/// missing key will cause the macro to stop and return [None].
///
/// The keys are either [Variant](super::super::Variant) or anything that implements
/// [Into]<[Variant](super::super::Variant)>, which includes all the supported primitive
/// types.
#[macro_export]
macro_rules! traverse {
    ( $value:expr $(,)? ) => ( ::std::option::Option::<&$crate::normal::Variant>::Some(&$value) );

    ( $value:expr, $key:expr $(,)? ) => ( $value.into_get($key) );

    ( $value:expr, $key:expr, $( $next_key:expr ),+ $(,)? ) => (
        match $crate::traverse!( $value, $key ) {
            ::std::option::Option::Some(value) => $crate::traverse!( value $( , $next_key )+ ),
            ::std::option::Option::None => ::std::option::Option::None,
        }
    );
}

/// Traverse a value by calling [Variant::get_mut](super::super::Variant::get_mut)
/// recursively.
///
/// The first argument is the starting [Variant](super::super::Variant). The following
/// arguments are a sequence of keys, which will be tried one at a time. Any non-collection or
/// missing key will cause the macro to stop and return [None].
///
/// The keys are either [Variant](super::super::Variant) or anything that implements
/// [Into]<[Variant](super::super::Variant)>, which includes all the supported primitive
/// types.
#[macro_export]
macro_rules! traverse_mut {
    ( $value:expr $(,)? ) => ( ::std::option::Option::<&mut $crate::normal::Variant>::Some($value) );

    ( $value:expr, $key:expr $(,)? ) => ( $value.into_get_mut($key) );

    ( $value:expr, $key:expr, $( $next_key:expr ),+ $( , )? ) => (
        match $crate::traverse_mut!( $value, $key ) {
            ::std::option::Option::Some(value) => $crate::traverse_mut!( value $( , $next_key )+ ),
            ::std::option::Option::None => ::std::option::Option::None,
        }
    );
}

#[allow(unused_imports)]
pub use {traverse, traverse_mut};