public class StringLength extends AbstractFunctionEvaluator
| Constructor and Description |
|---|
StringLength() |
| Modifier and Type | Method and Description |
|---|---|
IExpr |
evaluate(IAST ast,
EvalEngine engine)
Symbolic evaluation of a function.
|
void |
setUp(ISymbol symbol)
Evaluate built-in rules and define Attributes for a function.
|
createRuleFromMethod, getNormalizedNegativeExpression, getNormalizedNegativeExpression, getPeriodicParts, getPureImaginaryPart, getRuleAST, initSerializedRules, isNegativeExpressionnumericEvalpublic IExpr evaluate(IAST ast, EvalEngine engine)
AbstractFunctionEvaluatorast.get(0) (or alternatively ast.head()) contains the
head (i.e. the function symbol) of this abstract syntax tree (AST). ast.arg1() to ast.get(n) the ast contains the first to n-th argument of the
function (alternatively you get the first to fifth argument with the methods arg1(), arg2(),...
arg5()).Validate class to check the number or types of arguments in the evaluate
method.null value without throwing an exception!evaluate in interface IFunctionEvaluatorevaluate in class AbstractFunctionEvaluatorast - the abstract syntax tree (AST) which should be evaluatedengine - the users current evaluation enginenull, if evaluation isn't possibleValidate,
IExpr.head(),
IAST.arg1(),
IAST.arg2(),
IAST.arg3()public void setUp(ISymbol symbol)
AbstractFunctionEvaluatorsetUp in interface IEvaluatorsetUp in class AbstractFunctionEvaluatorsymbol - the symbol which should be set up