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NSLogicalTest Class Reference

Overview

Instances of this class perform logical operations of AND, OR, and NOT on Boolean expressions represented by NSSpecifierTest objects. These operators are equivalent to “&&”, “||”, and “!” in the C language.

For AND and OR operations, an NSLogicalTest object is typically initialized with an array containing two or more NSSpecifierTest objects. isTrue—inherited from NSScriptWhoseTest—evaluates the array in a manner appropriate to the logical operation. For NOT operations, an NSLogicalTest object is initialized with only one NSSpecifierTest object; it simply reverses the Boolean outcome of the isTrue method.

You don’t normally subclass NSLogicalTest.

Tasks

Initializing a Logical Test

• – initAndTestWithTests:
• – initNotTestWithTest:
• – initOrTestWithTests:

Instance Methods

initAndTestWithTests:

Returns an NSLogicalTest object initialized to perform an AND operation with the NSSpecifierTest objects in a given array.

- (id)initAndTestWithTests:(NSArray *)subTests

Parameters

subTests

An array of NSSpecifierTest objects representing Boolean expressions.

Return Value

An NSLogicalTest object initialized to perform an AND operation with the NSSpecifierTest objects in subTests.

Availability

• Available in Mac OS X v10.0 and later.

Declared In

NSScriptWhoseTests.h

initNotTestWithTest:

Returns an NSLogicalTest object initialized to perform a NOT operation on the given NSScriptWhoseTest object.

- (id)initNotTestWithTest:(NSScriptWhoseTest *)subTest

Parameters

subTest

The NSScriptWhoseTest object to invert.

Return Value

An NSLogicalTest object initialized to perform a NOT operation on subTest.

Availability

• Available in Mac OS X v10.0 and later.

Declared In

NSScriptWhoseTests.h

initOrTestWithTests:

Returns an NSLogicalTest object initialized to perform an OR operation with the NSSpecifierTest objects in a given array.

- (id)initOrTestWithTests:(NSArray *)subTests

Parameters

subTests

An array of NSSpecifierTest objects representing Boolean expressions.

Return Value

An NSLogicalTest object initialized to perform an OR operation with the NSSpecifierTest objects in subTests.

Availability

• Available in Mac OS X v10.0 and later.

Declared In

NSScriptWhoseTests.h

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