/// <summary>
/// Check that all found variables in the expression are defined/ created with a value.
/// </summary>
/// <returns></returns>
private bool CheckVariables()
{
bool errVarCreated = true;
// scan each defined var by the parser
foreach (ExprObjectUsedBase objectName in _expressionData.ExprParseResult.ListExprVarUsed)
{
ExprVariableBase variable = _expressionData.ExprExecResult.ListExprVariable.Find(v => v.Name.Equals(objectName.Name, StringComparison.InvariantCultureIgnoreCase));
if (variable == null)
{
// the variable is not created! no type and no value
_expressionData.ExprExecResult.AddErrorExec(ErrorCode.VariableNotDefined, "VarName", objectName.Name);
errVarCreated = false;
}
}
return(errVarCreated);
}
private bool ExecExpressionFinalOperand(ExecResult exprExecResult, ExprFinalOperand finalOperand, out ExpressionExecBase exprExecBase)
{
// is the operand a variable or a call function?
if (finalOperand.ContentType == OperandType.ObjectName)
{
// is it a variable?
ExprVariableBase exprVariableBase = _expressionData.ExprExecResult.ListExprVariable.Find(v => v.Name.Equals(finalOperand.Operand, StringComparison.InvariantCultureIgnoreCase));
if (exprVariableBase != null)
{
// the operand is a string variable?
ExprVariableString exprVariableString = exprVariableBase as ExprVariableString;
if (exprVariableString != null)
{
// create a var instance, depending on the type
ExprExecVarString exprExecVar = new ExprExecVarString();
exprExecVar.ExprVariableString = exprVariableString;
exprExecVar.Expr = finalOperand;
// set the value
exprExecVar.Value = exprVariableString.Value;
exprExecBase = exprExecVar;
return(true);
}
// the operand is an int variable?
ExprVariableInt exprVariableInt = exprVariableBase as ExprVariableInt;
if (exprVariableInt != null)
{
// create a var instance, depending on the type
ExprExecVarInt exprExecVar = new ExprExecVarInt();
exprExecVar.ExprVariableInt = exprVariableInt;
exprExecVar.Expr = finalOperand;
// set the value
exprExecVar.Value = exprVariableInt.Value;
exprExecBase = exprExecVar;
return(true);
}
// the operand is a double variable?
ExprVariableDouble exprVariableDouble = exprVariableBase as ExprVariableDouble;
if (exprVariableDouble != null)
{
// create a var instance, depending on the type
ExprExecVarDouble exprExecVar = new ExprExecVarDouble();
exprExecVar.ExprVariableDouble = exprVariableDouble;
exprExecVar.Expr = finalOperand;
// set the value
exprExecVar.Value = exprVariableDouble.Value;
exprExecBase = exprExecVar;
return(true);
}
// the operand is a bool variable?
ExprVariableBool exprVariableBool = exprVariableBase as ExprVariableBool;
if (exprVariableBool != null)
{
// create a var instance, depending on the type
ExprExecVarBool exprExecVar = new ExprExecVarBool();
exprExecVar.ExprVariableBool = exprVariableBool;
exprExecVar.Expr = finalOperand;
// set the value
exprExecVar.Value = exprVariableBool.Value;
exprExecBase = exprExecVar;
return(true);
}
// todo; create an error
throw new Exception("The operand variable type is not yet implemented!");
}
// so its a function call
// todo: rechercher dans la liste des fonctions?
throw new Exception("The function call is not yet implemented!");
}
// is the operand a string value (a const string value)?
if (finalOperand.ContentType == OperandType.ValueString)
{
ExprExecValueString exprValueString = new ExprExecValueString();
exprValueString.Value = finalOperand.Operand;
exprExecBase = exprValueString;
exprValueString.Expr = finalOperand;
return(true);
}
// is the operand an int value?
if (finalOperand.ContentType == OperandType.ValueInt)
{
ExprExecValueInt exprValueInt = new ExprExecValueInt();
exprValueInt.Expr = finalOperand;
exprValueInt.Value = finalOperand.ValueInt;
exprExecBase = exprValueInt;
return(true);
}
// is the operand a double value?
if (finalOperand.ContentType == OperandType.ValueDouble)
{
ExprExecValueDouble exprValueDouble = new ExprExecValueDouble();
exprValueDouble.Expr = finalOperand;
exprValueDouble.Value = finalOperand.ValueDouble;
exprExecBase = exprValueDouble;
return(true);
}
// is the operand a bool value?
if (finalOperand.ContentType == OperandType.ValueBool)
{
ExprExecValueBool exprValueBool = new ExprExecValueBool();
exprValueBool.Expr = finalOperand;
exprValueBool.Value = finalOperand.ValueBool;
exprExecBase = exprValueBool;
return(true);
}
// todo: create an error
throw new Exception("The operand const value is not yet implemented!");
}