nushell/crates/nu-json/src/forward.rs

#[macro_export]
/// Create a function to forward a specific serialize call to the generic deserialize
macro_rules! forward_to_deserialize {
    ($(
        $name:ident ( $( $arg:ident : $ty:ty ),* );
    )*) => {
        $(
            forward_to_deserialize!{
                func: $name ( $( $arg: $ty ),* );
            }
        )*
    };

    (func: deserialize_enum ( $( $arg:ident : $ty:ty ),* );) => {
        fn deserialize_enum<V>(
            &mut self,
            $(_: $ty,)*
            _visitor: V,
        ) -> ::std::result::Result<V::Value, Self::Error>
            where V: ::serde::de::EnumVisitor
        {
            Err(::serde::de::Error::invalid_type(::serde::de::Type::Enum))
        }
    };

    (func: $name:ident ( $( $arg:ident : $ty:ty ),* );) => {
        #[inline]
        fn $name<V>(
            &mut self,
            $(_: $ty,)*
            visitor: V,
        ) -> ::std::result::Result<V::Value, Self::Error>
            where V: ::serde::de::Visitor
        {
            self.deserialize(visitor)
        }
    };
}