2D Unconstrained Nx1 Array

Question

I\'m trying to create a flexible array of constants. I want to use a 2D array which may sometimes be for example a 2x1, 2x2, 3x2 array etc. For example:

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Answer 1

The LRM (section 9.3.3 Aggregates) states:

Aggregates containing a single element association shall always be specified using named association in order to distinguish them from parenthesized expressions.

So, this is OK:

constant n : int_1d_array(0 downto 0) := ( 0 => 1 );

and this is not:

constant n : int_1d_array(0 downto 0) := ( 1 );

http://www.edaplayground.com/x/6a4

Answer 2

I managed to compile the first example in the following ugly way:

type int_2d_array is array (integer range<>, integer range<>) of integer;
  constant M : positive := 2;
  constant nMax : positive := 1;
  constant n : int_2d_array(M - 1 downto 0, nMax - 1 downto 0) := ( (others => 1) , (others => 2) ); 

Strange behavior, indeed.