/**
* Constructor for function definition in natural math language,
* for instance providing on string "f(x,y) = sin(x) + cos(x)"
* is enough to define function "f" with parameters "x and y"
* and function body "sin(x) + cos(x)".
*
* @param functionDefinitionString Function definition in the form
* of one String, ie "f(x,y) = sin(x) + cos(x)"
* @param elements Optional elements list (variadic - comma separated)
* of types: Argument, Constant, Function
*
* @see PrimitiveElement
*
*/
public Function(String functionDefinitionString, params PrimitiveElement[] elements)
: base(Function.TYPE_ID)
{
parametersNumber = 0;
if (mXparser.regexMatch(functionDefinitionString, ParserSymbol.functionDefStrRegExp)) {
HeadEqBody headEqBody = new HeadEqBody(functionDefinitionString);
this.functionName = headEqBody.headTokens[0].tokenStr;
functionExpression = new Expression(headEqBody.bodyStr, elements);
functionExpression.setDescription(headEqBody.headStr);
if (headEqBody.headTokens.Count > 1)
{
Token t;
for (int i = 1; i < headEqBody.headTokens.Count; i++)
{
t = headEqBody.headTokens[i];
if (t.tokenTypeId != ParserSymbol.TYPE_ID)
functionExpression.addArguments(new Argument(t.tokenStr));
}
}
parametersNumber = functionExpression.getArgumentsNumber() - countRecursiveArguments();
description = "";
addFunctions(this);
}
else {
functionExpression = new Expression();
functionExpression.setDescription(functionDefinitionString);
String errorMessage = ""; errorMessage = errorMessage + "\n [" + functionDefinitionString + "] " + "--> pattern not mathes: f(x1,...,xn) = ... reg exp: " + ParserSymbol.functionDefStrRegExp;
functionExpression.setSyntaxStatus(Expression.SYNTAX_ERROR_OR_STATUS_UNKNOWN, errorMessage);
}
}