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Bof Function (RT)

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cls Function (RT)

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Cos Function (RT)

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CSend Function (RT)

CToD Function (RT)

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VoDbRecno Function (RT)

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XSharpLoadLibrary Function (RT)

Year Function (RT)

CheckInstanceOf Function

Determine if an object is an instance of a particular class.

Namespace: XSharp.RT
Assembly: XSharp.RT (in XSharp.RT.dll) Version: 2.19

Syntax

Copy

 FUNCTION CheckInstanceOf(
	oObject AS Object,
	symClassName AS STRING
) AS LOGIC

public static bool CheckInstanceOf(
	Object oObject,
	string symClassName
)

Request Example View Source

Parameters

oObject: Type: Object
The object to check for.
symClassName: Type: String
The class that oObject may be an instance of.

Return Value

Type: Logic
TRUE if oObject is an instance of symClassName; otherwise, an error is generated. FALSE is returned if you choose to ignore the error. If oObject is a NULL_OBJECT, a FALSE is returned but no error is generated.

Remarks

An instance of an inherited class is also an instance of the original (super) class. However, an instance of a super class is not an instance of any of its inherited classes. CheckInstanceOf() is similar to IsInstanceOf(), except that it also generates an error message if the specified object is not an instance of the specified class.

Examples

These examples illustrate CheckInstanceOf() on inherited classes:

Copy

 1CLASS Person
 2    EXPORT name, sign
 3CONSTRUCTOR(tName, tSign)
 4    name := tName
 5    sign := tSign
 6END CLASS
 7CLASS Male INHERIT Person
 8    EXPORT prefers
 9END CLASS
10FUNCTION CheckArgument()
11    LOCAL x, y AS OBJECT
12    x := Person{"Dude", "president"}
13    y := Male{"Charlie", "VP"}
14    ? CheckInstanceOf(x, #Person)        // TRUE
15    ? CheckInstanceOf(x, #Male)        // FALSE
16    ? CheckInstanceOf(y, #Person)        // TRUE
17    ? CheckInstanceOf(y, #Male)        // TRUE

Reference

Functions, Globals and Defines

XSharp.RT Namespace

ClassName(Object)

CreateInstance(Usual, Usual)

IsInstanceOfUsual(Usual, String)

IsMethodUsual(Usual, String)