Type Operations

The type operations allow you to test or query the value type of control data as shown in Table 1. For the corresponding type constants, see the table Type values for control data in Control Types and Constants.

Table 1: Type operations

Operation	Meaning	HALCON operator
b := is_handle	test for handle values	tuple_is_handle
b := is_int(t)	test for integer values	tuple_is_int
b := is_mixed(t)	test for mixed values	tuple_is_mixed
b := is_number(t)	test for numerical values	tuple_is_number
b := is_real(t)	test for real values	tuple_is_real
b := is_string(t)	test for string values	tuple_is_string
b := is_valid_handle(t)	test for valid handles	tuple_is_valid_handle
s := sem_type(t)	get semantic type	tuple_sem_type
i := type(t)	get type value	tuple_type

There are also corresponding operations that test each element of the input tuple as shown in Table 2.

Table 2: Elementwise type operations

Operation	Meaning	HALCON operator
t := is_handle_elem	elementwise test for handle values	tuple_is_handle_elem
t := is_int_elem(t)	elementwise test for integer values	tuple_is_int_elem
t := is_nan_elem(t)	elementwise test for NaNs	tuple_is_nan_elem
t := is_real_elem(t)	elementwise test for real values	tuple_is_real_elem
t := is_string_elem(t)	elementwise test for string values	tuple_is_string_elem
t := sem_type_elem(t)	get semantic type elementwise	tuple_sem_type_elem
t := type_elem(t)	get type value elementwise	tuple_type_elem