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from typing import TypeVar
import act4e_interfaces as I
from .maps_representation import MyFiniteMap
A = TypeVar("A")
B = TypeVar("B")
C = TypeVar("C")
class SolFiniteMapOperations(I.FiniteMapOperations):
def identity(self, s: I.Setoid[A]) -> I.Mapping[A, A]:
values = []
for a in s.elements():
values.append([a, a])
return MyFiniteMap(s, s, values)
def compose(self, f: I.FiniteMap[A, B], g: I.FiniteMap[B, C]) -> I.FiniteMap[A, C]:
values = []
for a in f.source().elements():
values.append([a, g(f(a))])
return MyFiniteMap(f.source(), g.target(), values)
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