circuitpython/tests/micropython/viper_misc.py

import micropython

# viper function taking and returning ints
@micropython.viper
def viper_int(x: int, y: int) -> int:
    return x + y + 3


print(viper_int(1, 2))

# viper function taking and returning objects
@micropython.viper
def viper_object(x: object, y: object) -> object:
    return x + y


print(viper_object(1, 2))

# return None as non-object (should return 0)
@micropython.viper
def viper_ret_none() -> int:
    return None


print(viper_ret_none())

# return Ellipsis as object
@micropython.viper
def viper_ret_ellipsis() -> object:
    return ...


print(viper_ret_ellipsis())

# 3 args
@micropython.viper
def viper_3args(a: int, b: int, c: int) -> int:
    return a + b + c


print(viper_3args(1, 2, 3))

# 4 args
@micropython.viper
def viper_4args(a: int, b: int, c: int, d: int) -> int:
    return a + b + c + d


# viper call with 4 args not yet supported
# print(viper_4args(1, 2, 3, 4))

# a local (should have automatic type int)
@micropython.viper
def viper_local(x: int) -> int:
    y = 4
    return x + y


print(viper_local(3))

# without type annotation, types should default to object
@micropython.viper
def viper_no_annotation(x, y):
    return x * y


print(viper_no_annotation(4, 5))

# a for loop
@micropython.viper
def viper_for(a: int, b: int) -> int:
    total = 0
    for x in range(a, b):
        total += x
    return total


print(viper_for(10, 10000))

# accessing a global
@micropython.viper
def viper_access_global():
    global gl
    gl = 1
    return gl


print(viper_access_global(), gl)

# calling print with object and int types
@micropython.viper
def viper_print(x, y: int):
    print(x, y + 1)


viper_print(1, 2)

# convert constants to objects in tuple
@micropython.viper
def viper_tuple_consts(x):
    return (x, 1, False, True)


print(viper_tuple_consts(0))

# making a tuple from an object and an int
@micropython.viper
def viper_tuple(x, y: int):
    return (x, y + 1)


print(viper_tuple(1, 2))

# making a list from an object and an int
@micropython.viper
def viper_list(x, y: int):
    return [x, y + 1]


print(viper_list(1, 2))

# making a set from an object and an int
@micropython.viper
def viper_set(x, y: int):
    return {x, y + 1}


print(sorted(list(viper_set(1, 2))))

# raising an exception
@micropython.viper
def viper_raise(x: int):
    raise OSError(x)


try:
    viper_raise(1)
except OSError as e:
    print(repr(e))

# calling GC after defining the function
@micropython.viper
def viper_gc() -> int:
    return 1


print(viper_gc())
import gc

gc.collect()
print(viper_gc())