Macro elrond::std_val

macro_rules! std_val {
    (
        @PLATFORM
        @ID: $identifier: ident;
        @INTO_FROM: $($kind: ty),*;
        @READER: $reader:ident => $new_sym: ident;
    ) => { ... };
    (
        @ID: $identifier: ident; $internal: ty;
        @INTO_FROM: $($kind: ty),*;
        @READER: $reader:ident => $new_sym: ident;
    ) => { ... };
}