codon/stdlib/internal/sort.codon

# (c) 2022 Exaloop Inc. All rights reserved.

from algorithms.pdqsort import pdq_sort_inplace
from algorithms.insertionsort import insertion_sort_inplace
from algorithms.heapsort import heap_sort_inplace
from algorithms.qsort import qsort_inplace


def sorted(
    v: Generator[T],
    key=Optional[int](),
    algorithm: Optional[str] = None,
    reverse: bool = False,
    T: type,
) -> List[T]:
    """
    Return a sorted list of the elements in v
    """
    newlist = [a for a in v]
    if not isinstance(key, Optional):
        newlist.sort(key, algorithm, reverse)
    else:
        newlist.sort(algorithm=algorithm, reverse=reverse)
    return newlist


def _sort_list(
    self: List[T], key: Callable[[T], S], algorithm: str, T: type, S: type
) -> void:
    if algorithm == "pdq":
        pdq_sort_inplace(self, key)
    elif algorithm == "insertion":
        insertion_sort_inplace(self, key)
    elif algorithm == "heap":
        heap_sort_inplace(self, key)
    elif algorithm == "quick":
        qsort_inplace(self, key)
    else:
        raise ValueError("Algorithm '" + algorithm + "' does not exist")


@extend
class List:
    def sort(
        self,
        key=Optional[int](),
        algorithm: Optional[str] = None,
        reverse: bool = False,
    ) -> void:
        alg = ~algorithm if algorithm else "pdq"
        if isinstance(key, Optional):
            _sort_list(self, lambda x: x, alg)
        else:
            _sort_list(self, key, alg)
        if reverse:
            self.reverse()