Type processors

[amitu]

Any record can declare they are "magical".

-- record foo:
$processor$: some-processor
caption name:

Once we have type alias feature implemented, there too we can specify the magic.

-- type size: decimal
$processor$: some-processor

Stuck On Type Processor

let mut i = ftd::interpret(name, source)?;
loop {
    ftd::Interpreter::StuckOnTypeProcessor { type, processor_name, p1_section, state: st } => {
       i = st.continue_after_type_processor(resolve_var(type, p1_section))
    }
}