This removes the assertions that checked plugin devs didn't do anything
overly bad in favour of using mypy to ensure appropriate type-checking.
It also moves the ProgressCallback typing information to constants in
order to avoid circular imports (since constants doesn't import
anything).
Relented on the strict import of direct objects/classes for the typing
module only. Typing module components can be directly imported because
it makes the code really painful to read and write otherwise.
This is still in-line with the python style guide adopted from Google at
http://google.github.io/styleguide/pyguide.html section 2.2.
The introduction of symbol resolution required subresolving "unnamed"
(symbol named) types. The resolution system was changed to pass
constructed objects rather than names, which prevented the referencing
from working properly. This commit changes that bit back and creates a
temporary *type* in the _resolved list for the symbol, then restores
whatever was there before.
We restore it so that people don't get used to looking up symbols using
get_type (we may revisit this decision).
They weren't consistent and they show just remind me how slowly
I've been getting vol 3 written! 5:S
There's git commits to track all of that stuff if we need it.
This allows NativeSymbolTables to be appended to symbol_spaces and
uses this to let automagic modules (which have no existing symbol table
to rely on) to load natives for reading format data.
This template type allows objects that have not been able to be resolved
to exist within the symbol system. It emits a debug message on creation
so that intermediate format developers can identify potential issues,
but does not raise an exception so as to allow partial tables to be
used.
If the UnresolvedTemplate is called (to create an object) before the
symbol has been added to the symbolspace, it will fail with a
SymbolError (as thrown by the individual SymbolTable). For this reason,
the class has been made private to the SymbolSpace class to prevent
unexpected use.
Mike Auty