910f579403
In @micropython.native code the types of variables and expressions are always Python objects, so they can be initialised as such. This prevents problems with compiling optimised code like while-loops where a local may be referenced before it is assigned to. Signed-off-by: Damien George <damien@micropython.org>
41 lines
810 B
Python
41 lines
810 B
Python
(x := 4)
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print(x)
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if x := 2:
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print(True)
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print(x)
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print(4, x := 5)
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print(x)
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x = 1
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print(x, x := 5, x)
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print(x)
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# Test "while" with assignment expression as conditional, assigning to a new local.
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# The while conditional is compiled after the while body, so this tests how the
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# compiler handles the case of an unbound local being compiled before it is assigned.
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def f():
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l = [0, 1]
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while local := len(l):
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print(local, l.pop())
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f()
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def foo():
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print("any", any((hit := i) % 5 == 3 and (hit % 2) == 0 for i in range(10)))
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return hit
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hit = 123
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print(foo())
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print(hit) # shouldn't be changed by foo
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print("any", any((hit := i) % 5 == 3 and (hit % 2) == 0 for i in range(10)))
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print(hit) # should be changed by above
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print([((m := k + 1), k * m) for k in range(4)])
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print(m)
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