Fraction.__new__ now accepts anything with .as_integer_ratio() (#12994)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

Author: InSyncWithFoo

stdlib/fractions.pyi

@@ -2,7 +2,7 @@ import sys
 from collections.abc import Callable
 from decimal import Decimal
 from numbers import Integral, Rational, Real
-from typing import Any, Literal, SupportsIndex, overload
+from typing import Any, Literal, Protocol, SupportsIndex, overload
 from typing_extensions import Self, TypeAlias
 
 _ComparableNum: TypeAlias = int | float | Decimal | Real
@@ -20,11 +20,19 @@ else:
     @overload
     def gcd(a: Integral, b: Integral) -> Integral: ...
 
+class _ConvertibleToIntegerRatio(Protocol):
+    def as_integer_ratio(self) -> tuple[int | Rational, int | Rational]: ...
+
 class Fraction(Rational):
     @overload
     def __new__(cls, numerator: int | Rational = 0, denominator: int | Rational | None = None) -> Self: ...
     @overload
     def __new__(cls, value: float | Decimal | str, /) -> Self: ...
+
+    if sys.version_info >= (3, 14):
+        @overload
+        def __new__(cls, value: _ConvertibleToIntegerRatio) -> Self: ...
+
     @classmethod
     def from_float(cls, f: float) -> Self: ...
     @classmethod