PlType Enumeration

Obtain the type of a term, which should be a term returned by one of the other interface predicates or passed as an argument. The function returns the type of the Prolog term. The type identifiers are listed below.

Declaration Syntax

Visual Basic

Visual C++

public enum PlType

Public Enumeration PlType

public enum class PlType

type PlType

Members

Member	Description
PlUnknown	0 - PL_UNKNOWN: Undefined
PlVariable	1 - PL_VARIABLE: An unbound variable. The value of term as such is a unique identifier for the variable.
PlAtom	2 - PL_ATOM: A Prolog atom.
PlInteger	3 - PL_INTEGER: A Prolog integer.
PlFloat	4 - PL_FLOAT: A Prolog floating point number.
PlString	5 - PL_STRING: A Prolog string.
PlTerm	6 - PL_TERM: A compound term. Note that a list is a compound term ./2.

Remarks

see PL_term_type(term_t) in the SWI-Prolog Manual.

Examples

In this sample a Prolog variable is created in PlTerm t and the PlType is checked by his integer representation and his name.

	Copy
PlTerm t = PlTerm.PlVar(); Assert.AreEqual(1, (int)t.PlType); Assert.AreEqual(PlType.PlVariable, t.PlType);