/// <summary>
/// Creates an expression quadruple.
/// </summary>
/// <param name="operators">Operators.</param>
private static void CreateExpressionQuadruple(
Operators[] operators)
{
// Get index of fake bottom
int index = (hierarchyStack.Count > 0) ? hierarchyStack.Peek() : 0;
if (operatorStack.Count > index &&
operators.Contains(operatorStack.Peek()))
{
// Pop types
GraphicFooType t2 = typeStack.Pop();
GraphicFooType t1 = typeStack.Pop();
if (t1 != GraphicFooType.Invalid &&
t2 != GraphicFooType.Invalid)
{
// Pop operands
string id2 = operandStack.Pop();
string id1 = operandStack.Pop();
// Find variables
Variable v1 = ProgramMemory.FindVariable(scope, id1);
Variable v2 = ProgramMemory.FindVariable(scope, id2);
// Pop operator
Operators op = operatorStack.Pop();
// Check association rules
GraphicFooType resultingType =
AssociationRules.GetOperationType(op, t1, t2);
// Create new temporary variable
Variable temp;
if (scope == null)
{
temp = ProgramMemory.AddGlobalTemporary(resultingType);
}
else
{
temp = scope.AddTemporaryVariable(resultingType);
}
// Push temp
operandStack.Push(temp.name);
typeStack.Push(temp.type);
// Create quadruple
Quadruple qudruple = new Quadruple(
op,
v1,
v2,
temp
);
PushQuadruple(qudruple);
}
}
}
/// <summary>
/// Initialize this instance.
/// </summary>
public static void Initialize()
{
// Stacks
operandStack = new Stack <string> ();
typeStack = new Stack <GraphicFooType> ();
operatorStack = new Stack <Operators> ();
hierarchyStack = new Stack <int> ();
jumpStack = new Stack <int> ();
quadruples = new Dictionary <int, Quadruple> ();
AssociationRules.Initialize();
}
