looking good to me. @cyberthirst can you take a look?

bit unrelated, but if an interface implements other interface and doesn't implement all the methods, we get the following exception:

vyper.exceptions.InterfaceViolation: Contract does not implement all interface functions: foobar()

Contract does not implement.. although it can be triggered via eg vyper -f abi i.vyi

-f interface doesn't include Flags. is it intended?

-f interface doesn't include Flags. is it intended?

Not intended. May be the order in which we merged flag and -f interfave PRs

shouldn't -f interface be basically an identity when called on interface files?

import ITest2

implements: ITest2

def bar() -> uint256:
    ...

def foo() -> uint8:
    ...


def foobar() -> uint8:
    ...

outputs:

# Functions

@external
def bar() -> uint256:
    ...


@external
def foo() -> uint8:
    ...


@external
def foobar() -> uint8:
    ...

ie implements is lost in the translation

shouldn't -f interface be basically an identity when called on interface files?

import ITest2

implements: ITest2

def bar() -> uint256:
    ...

def foo() -> uint8:
    ...


def foobar() -> uint8:
    ...

outputs:

# Functions

@external
def bar() -> uint256:
    ...


@external
def foo() -> uint8:
    ...


@external
def foobar() -> uint8:
    ...

ie implements is lost in the translation

also, if ITest2.vyi contains a struct (or flag), then those don't propagate for -f interface - not sure whether that's intentional

 vyper -f external_interface tests/custom/ITest.vyi

# External Interfaces
interface Itest:
    def bar() -> uint256: nonpayable
    def foo() -> uint8: nonpayable
    def foobar() -> uint8: nonpayable

name discrepancy - Itest vs ITest