Algebraic Data Types in Python
import adt
class MyADT(adt.ADT):
foo: ()
bar: (int,)
baz: (int, bool, str, None)
@adt.fieldmethod
def double_first(field, basecls) -> "MyADT":
if isinstance(field, basecls.foo):
raise TypeError(
f"{basecls.foo.__qualname__} does not support doubling"
)
field_type = type(field)
first, *rem = field
return field_type(first * 2, *rem)
foo = MyADT.foo()
bar = MyADT.bar(4)
baz = MyADT.baz(3, False, "hi", None)
for val in [foo, bar, baz]:
print(val)
try:
doubled = val.double_first()
print("Doubled:", doubled)
except TypeError:
print("Failed to double")
print()
See examples/, adt/example.py and tests/test.py.
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Release files for adt 0.0.2
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Source distribution (sdist)
| File | Size | Uploaded | |
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| adt-0.0.2.tar.gz | 8.5 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| adt-0.0.2-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 13.5 kB
Release files / adt-0.0.2.tar.gz
| Download URL | adt-0.0.2.tar.gz |
|---|---|
| Size | 8.5 kB |
| Tags | Source |
|
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Release files / adt-0.0.2-py3-none-any.whl
| Download URL | adt-0.0.2-py3-none-any.whl |
|---|---|
| Size | 5.0 kB |
| Tags | Python 3 |
|
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