Handle deprecated argument with warning — deprecate_arg • bsvarPost

Issues a deprecation warning when an old argument is used, and resolves which value to return (new takes precedence over old).

Usage

deprecate_arg(new_val, old_val, old_name, new_name, fn_name)

Arguments

new_val: Value provided for the new argument (may be NULL).
old_val: Value provided for the deprecated argument (may be NULL).
old_name: Name of the deprecated argument for the warning message.
new_name: Name of the replacement argument for the warning message.
fn_name: Name of the calling function for the warning message.

Value

new_val if not NULL; old_val otherwise.