Cannot import contract/interface that uses constants

[xrchz]

Version Information

• vyper Version (output of vyper --version): 0.3.7+commit.6020b8b
• OS: GNU/Linux
• Python Version (output of python --version): Python 3.10.9

What's your issue about?

> cat error5.vy
MAX: constant(uint256) = 9

@external
@view
def foo(y: DynArray[uint256, MAX]) -> uint256:
  return y[1]

> cat error6.vy
MAX: constant(uint256) = 9 # this line can be included or excluded, the error is the same
import error5 as E5

> vyper error5.vy
# ... outputs bytecode, no error

> vyper error6.vy
Error compiling: error6.vy
vyper.exceptions.StructureException: DynArray must be defined with base type and max length, e.g. DynArray[bool, 5]
  contract "E5:5", function "foo", line 5:11
       4 @view
  ---> 5 def foo(y: DynArray[uint256, MAX]) -> uint256:
  ------------------^
       6   return y[1]

How can this contract be imported?

[trocher]

The issue is probably due to the fact that imported contracts are only parsed to AST and not to folded AST:

vyper/vyper/semantics/analysis/module.py

Line 340 in a71d604

interface_ast = vy_ast.parse_to_ast(interface_codes[name]["code"], contract_name=name)

[charles-cooper]

related: #2670

[charles-cooper]

implemented in #3663