A function call calls a function which returns a value.

Syntax:

function_name [ ( [ parameter => ] expression, ... ) ]

Description:

The function parameters can be listed in both positional association and named association. Both methods can be mixed in one function call (although positional association must come before named association).

Named associated is advised to improve readability and reduce the risk of making mistakes.

Example:

A:= to_std_logic_vector (J, 4);
B:= "+"(L => M, R => N);          -- equivalent to B:= M + N

Notes:

• Operators can be called by writing the operator symbol between the operands (e.g. A + B) or by using the function call syntax (e.g. "+"(A, B)).

See also:

Function, Procedure, Procedure call