tuple_typetuple_typeTupleTypeTupleTypetuple_type (Operator)

Name

tuple_typetuple_typeTupleTypeTupleTypetuple_type — Return the type of a tuple.

Signature

Description

tuple_typetuple_typeTupleTypeTupleTypetuple_type returns the type of the input tuple TTTtt. The type is returned as an integer value in the output parameter TypeTypeTypetypetype. In HDevelop corresponding constants are defined:

• H_TYPE_INT (1).

• H_TYPE_REAL (2).

• H_TYPE_STRING (4).

• H_TYPE_MIXED (8).

• H_TYPE_HANDLE (16).

• H_TYPE_ANY (31).

H_TYPE_MIXED is returned in the following two cases:

• some elements of the tuple have different data types, e.g., real and integer.

• the tuple TTTtt has undergone operations which modified the data type of single elements. Such tuples will generally not be optimized automatically (because of runtime reasons) even if the data types of all elements become equal in subsequent operations. See tuple_is_mixedtuple_is_mixedTupleIsMixedTupleIsMixedtuple_is_mixed and the following example on how to optimize such tuples.

Exception: Empty input tuple

If the input tuple is empty, the operator returns 31 (H_TYPE_ANY).

HDevelop In-line Operation

HDevelop provides an in-line operation for tuple_typetuple_typeTupleTypeTupleTypetuple_type, which can be used in an expression in the following syntax:

Type := type(T)

Attention

tuple_typetuple_typeTupleTypeTupleTypetuple_type returns the internal data type of the tuple. In contrast to tuple_is_numbertuple_is_numberTupleIsNumberTupleIsNumbertuple_is_number it does not return whether a tuple could be represented as a tuple of a certain type.

Execution Information

• Multithreading type: independent (runs in parallel even with exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Processed without parallelization.

Parameters

Example (HDevelop)

tuple_type ([3.1416,'pi',3], TypeA)
* TypeA = H_TYPE_MIXED
tuple_type (['a','b','111'], TypeB)
* TypeB = H_TYPE_STRING
tuple_type ([], TypeC)
* TypeC = H_TYPE_ANY
tuple_type (HNULL, TypeD)
* TypeD = H_TYPE_HANDLE

TupleInt := [1,2,3,4]
TupleReal := [42.0]
TupleConcat := [TupleInt, TupleReal]
tuple_type (TupleConcat, TypeConcat)
* TypeConcat = H_TYPE_MIXED
* Now set 42.0 to 42
TupleConcat[4] := 42
tuple_type (TupleConcat, TypeConcat2)
* TypeConcat2 = H_TYPE_MIXED
* TupleConcat now consists of integers only, but the
* internal representation hasn't been updated. Optimize
* it by converting the tuple explicitly to an integer
* tuple.
tuple_int (TupleConcat, TupleConcatInt)
tuple_type (TupleConcatInt, TypeConcatInt)
* TypeConcatInt = H_TYPE_INT

Result

If the parameters are valid, the operator tuple_typetuple_typeTupleTypeTupleTypetuple_type returns the value 2 ( H_MSG_TRUE) .

Alternatives

tuple_is_inttuple_is_intTupleIsIntTupleIsInttuple_is_int, tuple_is_numbertuple_is_numberTupleIsNumberTupleIsNumbertuple_is_number, tuple_is_realtuple_is_realTupleIsRealTupleIsRealtuple_is_real, tuple_is_stringtuple_is_stringTupleIsStringTupleIsStringtuple_is_string, tuple_sem_typetuple_sem_typeTupleSemTypeTupleSemTypetuple_sem_type

See also

get_obj_classget_obj_classGetObjClassGetObjClassget_obj_class

Module

Foundation