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())

# 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))

# unsigned ints
@micropython.viper
def viper_uint() -> uint:
    return uint(-1)
import sys
print(viper_uint() == (sys.maxsize << 1 | 1))

# 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())