tuple_is_mixed — Test whether a tuple is of type mixed.
tuple_is_mixed tests the input tuple T. If the type is mixed, the value 1 (true) is returned in IsMixed, else 0 (false) is returned. If a tuple consists of elements with equal data types only, IsMixed can nevertheless be 1 in case the internal representation is H_TYPE_MIXED; see tuple_type for details.
If the type of the tuple is mixed and you need all elements of the tuple T to be of one data type only, you can explicitly convert the tuple to a better fitting representation by using tuple_int, tuple_real or tuple_string with Format='s'. This improves processing speed for the converted tuple which is especially useful if the tuple is used many times afterwards.
If the input tuple is empty, the operator returns 1.
HDevelop provides an in-line operation for tuple_is_mixed, which can be used in an expression in the following syntax:
IsMixed := is_mixed(T)
Is the input tuple of type mixed?
tuple_is_mixed ([3.1416,'pi',3], IsMixedA) * IsMixedA = true tuple_is_mixed (['a','b','111'], IsMixedB) * IsMixedB = false tuple_is_mixed (, IsMixedC) * IsMixedC = true
If the parameters are valid, the operator tuple_is_mixed returns the value 2 (H_MSG_TRUE).