// return type of the function
// todo:
public void AddFirstParameter(ExpressionBase exprParameter)
{
ListExprParameters.Insert(0, exprParameter);
}
/// <summary>
/// start the execution, analyze and return the list of variables to create.
/// todo: recréer un syntax tree, avec des valeurs!
///
/// -->Doit renvoyer comme résultat un objet de type ExprValueXXX, non?? (si pas d'erreur).
/// </summary>
/// <returns></returns>
private bool ExecExpression(ExecResult exprExecResult, ExpressionBase expr, out ExpressionExecBase exprExecBase)
{
exprExecBase = null;
//----is it a final operand (value, var or call function)?
ExprFinalOperand finalOperand = expr as ExprFinalOperand;
if (finalOperand != null)
{
return(ExecExpressionFinalOperand(exprExecResult, finalOperand, out exprExecBase));
}
//----is it a comparison expression?
ExprComparison exprComparison = expr as ExprComparison;
if (exprComparison != null)
{
// execute the expression, execute the right part, execute the left part, then exec the expr (as 2 value operands)
return(ExecExpressionComparison(exprExecResult, exprComparison, out exprExecBase));
}
//----is it a logical expression (bin/2 operands)?
ExprLogical exprLogical = expr as ExprLogical;
if (exprLogical != null)
{
return(ExecExpressionLogical(exprExecResult, exprLogical, out exprExecBase));
}
//----is it a NOT logical expression?
ExprLogicalNot exprLogicalNot = expr as ExprLogicalNot;
if (exprLogicalNot != null)
{
return(ExecExpressionLogicalNot(exprExecResult, exprLogicalNot, out exprExecBase));
}
//----is it a calculation expression?
ExprCalculation exprCalculation = expr as ExprCalculation;
if (exprCalculation != null)
{
// execute the expression, execute the right part, execute the left part, then exec the expr (as 2 value operands)
return(ExecExpressionCalculation(exprExecResult, exprCalculation, out exprExecBase));
}
//----is it function call?
ExprFunctionCall exprFunctionCall = expr as ExprFunctionCall;
if (exprFunctionCall != null)
{
return(ExecExpressionFunctionCall(exprExecResult, exprFunctionCall, out exprExecBase));
}
//----is it a setValue expression?
// todo: future
// todo: error, expression not yet implemented!!
exprExecResult.AddErrorExec(ErrorCode.ExpressionTypeNotYetImplemented, "Expr", expr.GetType().ToString());
return(false);
}
