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# check that we can do certain things without allocating heap memory
import micropython
# Check for stackless build, which can't call functions without
# allocating a frame on heap.
try:
def stackless():
pass
micropython.heap_lock()
stackless()
micropython.heap_unlock()
except RuntimeError:
print("SKIP")
raise SystemExit
def f1(a):
print(a)
def f2(a, b=2):
print(a, b)
def f3(a, b, c, d):
x1 = x2 = a
x3 = x4 = b
x5 = x6 = c
x7 = x8 = d
print(x1, x3, x5, x7, x2 + x4 + x6 + x8)
def f4():
return True, b"bytes", ()
global_var = 1
def test():
global global_var, global_exc
global_var = 2 # set an existing global variable
for i in range(2): # for loop
f1(i) # function call
f1(i * 2 + 1) # binary operation with small ints
f1(a=i) # keyword arguments
f2(i) # default arg (second one)
f2(i, i) # 2 args
f1((1, "two", (b"three",))) # use a constant tuple
f3(1, 2, 3, 4) # function with lots of local state
for i in 1, "two": # iterate over constant tuple
print(i)
print(f4()) # returns a constant tuple
# call test() with heap allocation disabled
micropython.heap_lock()
test()
micropython.heap_unlock()
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