Use declarations are now grouped into 4 groups:
- Declarations from the standard library
- Declarations from external crates
- Declarations from other crates in this project
- Declarations from within this module
Furthermore, all use declarations are grouped together to enhance
readability. super::super is also replaced by an equivalent crate::
declaration.
There have been multiple instances where I had the need to iterate over
type variables, only to discover that the traversal order is arbitrary.
This commit fixes that by adding SortedMapping, which utilizes BTreeMap
internally to guarantee a traversal order. All instances of VarMap are
now refactored to use this to ensure that type variables are iterated in
the order of its variable ID, which should be monotonically incremented
by the unifier.
1. Function type variables should not include class type variables,
because they are not bound to the function.
2. Defer type variable constraint evaluation until we get all fields
definition.
- Added `Exception` primitive type and some builtin exception types.
Note that all exception types share the same layout, and should
inherit from the base `Exception` type. There are some hacks in the
toplevel module for handling exception types, we should revisit and
fix them later.
- Added new primitive types to concrete type module, otherwise there
would be some weird type errors.
- Changed the representation of strings to CSlice<u8>, instead of
CString.
Add `TypeVar` and `virtual` support for Symbol Resolver in nac3artiq and nac3standalone
Reviewed-on: M-Labs/nac3#99
Co-authored-by: ychenfo <yc@m-labs.hk>
Co-committed-by: ychenfo <yc@m-labs.hk>
