org.matheclipse.core.builtin.function

Class ValueQ

java.lang.Object

org.matheclipse.core.eval.interfaces.AbstractCoreFunctionEvaluator

org.matheclipse.core.builtin.function.ValueQ

All Implemented Interfaces:

Predicate<IExpr>, ICoreFunctionEvaluator, IFunctionEvaluator, IEvaluator

public class ValueQ
extends AbstractCoreFunctionEvaluator
implements Predicate<IExpr>

Returns True, if the given expression is bound to a value.

Field Summary

Fields

Modifier and Type	Field and Description
static ValueQ	CONST Constructor for the unary predicate

Constructor Summary

Constructors

Constructor and Description
ValueQ()

Method Summary

Modifier and Type	Method and Description
boolean	apply(IExpr expr) Returns the result of applying this predicate to input.
IExpr	evaluate(IAST ast) Returns True if the 1st argument is an atomic object; False otherwise
IExpr	numericEval(IAST ast) Numeric evaluation of a function.

Methods inherited from class org.matheclipse.core.eval.interfaces.AbstractCoreFunctionEvaluator

setUp

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.google.common.base.Predicate

equals

Field Detail

CONST

public static final ValueQ CONST

Constructor for the unary predicate

Constructor Detail

ValueQ

public ValueQ()

Method Detail

evaluate

public IExpr evaluate(IAST ast)

Returns True if the 1st argument is an atomic object; False otherwise

Specified by:

evaluate in interface IFunctionEvaluator

Specified by:

evaluate in class AbstractCoreFunctionEvaluator

Parameters:

ast - the abstract syntax tree (AST) which should be evaluated

Returns:

the evaluated object or null, if evaluation isn't possible

See Also:

Validate

apply

public boolean apply(IExpr expr)

Description copied from interface: Predicate

Returns the result of applying this predicate to input. This method is generally expected, but not absolutely required, to have the following properties:

• Its execution does not cause any observable side effects.
• The computation is consistent with equals; that is, Objects.equal(a, b) implies that predicate.apply(a) == predicate.apply(b)).

Specified by:

apply in interface Predicate<IExpr>

numericEval

public IExpr numericEval(IAST ast)

Description copied from class: AbstractCoreFunctionEvaluator

Numeric evaluation of a function. ast.get(0) contains the head (i.e. the function symbol) of this abstract syntax tree (AST). ast.get(1) to ast.get(n) contains the first to n-th argument of the function.
If necessary use the methods from the Validate class to check the number or types of arguments in the evaluate method.

Specified by:

numericEval in interface IFunctionEvaluator

Overrides:

numericEval in class AbstractCoreFunctionEvaluator

Parameters:

ast - the abstract syntax tree (AST) which should be evaluated

Returns:

the evaluated object or null, if evaluation isn't possible

See Also:

Validate