# TODO: dependent (static shaped)
.NDArray = 'ndarray': (T: Type) -> ClassType
.NDArray(T) <: Output T
.NDArray(_) <: Num
.NDArray.
    shape: [Nat; _]
    ndim: Nat
    dtype: Type
    size: Nat

.nan: Float
.Nan: Float

.abs: |T|(object: .NDArray(T),) -> .NDArray(T)
.add: |T|(object: .NDArray(T), other: .NDArray(T)) -> .NDArray(T)
.all: |T <: Num|(object: .NDArray(T),) -> Bool
.any: |T <: Num|(object: .NDArray(T),) -> Bool
.arange: |T <: Num|(start: T, stop := T, step := T) -> .NDArray(T)
.array: |T|(object: Iterable(T),) -> .NDArray(T)
.linspace: |T <: Num|(start: T, stop: T, num := Nat, endpoint := Bool, retstep := Bool, dtype := Type, axis := Nat) -> .NDArray(T)
.max: |T <: Num|(object: .NDArray(T),) -> T
.mean: |T <: Num|(object: .NDArray(T),) -> T
.min: |T <: Num|(object: .NDArray(T),) -> T
.ones: |T|(shape: Nat or [Nat; _], dtype := Type) -> .NDArray(T)
.reshapce: |T|(object: .NDArray(T), shape: [Nat; _]) -> .NDArray(T)
.std: |T <: Num|(object: .NDArray(T),) -> T
.sum: |T|(object: .NDArray(T),) -> T
.sqrt: |T|(object: .NDArray(T),) -> .NDArray(T)
.transpose: |T|(object: .NDArray(T), axes := [Nat; _]) -> .NDArray(T)