Is it possible to have a type say: struct A{B} field::NTuple{N, Int} end Say B is always a number so A{5}, A{7} and so on. Is it possible to specify in the type definition that N depends on B, in some manner e.g: struct A{B} field::NTuple{(B / 64), UInt64} end The above doesn’t work, but hopefu…

As @mauro3 pointed out, that is not possible. But you are able to enforce that by defining a inner constructor: julia> struct A{B,N} field::NTuple{N,Int} function A{B}(x) where {B} N = B÷64 N == length(x) || throw(ArgumentError("Tuple of incorrect length")) …

NTuple length dependent on parameter of type

General Usage

mauro3 November 27, 2017, 3:44pm 2

No, that is not possible. See Algebraic constraints for type parameters.

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NTuple length dependent on parameter of type

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