Bad Rust codegen on when using type aliases to primitive types

[brendanzab]

Offset32 = u32be;

MyStruct = {
    offset: Offset32;
}

Will try cause the following rustc error:

error[E0599]: no function or associated item named `read` found for type `u32` in the current scope
   --> /Users/brendan/...
    |
480 |         let offset = Offset32::read(reader)?;
    |                      ^^^^^^^^^^^^^^ function or associated item not found in `u32`
    |
    = note: the method `read` exists but the following trait bounds were not satisfied:
            `&mut u32 : std::io::Read`

We might need to keep track of a context during compilation to allow us to lookup whether a type is an alias or something else, and what that alias points to...

[brendanzab]

This relates to the first attempt at the DDL which is now obsolete, so closing this.