public Expression ExpandConstant(string name)
{
if (EvaluatingConstants.Contains(name))
{
throw new CompilationException("Cycle in constants evaluation detected", name, 0);
}
EvaluatingConstants.Add(name);
Constants[name] = Constants[name].ExpandConstants(this);
EvaluatingConstants.Remove(name);
return(Constants[name]);
}
public void EvaluateAllExpressions()
{
var address = 0;
foreach (var constant in Constants.Keys.ToArray())
{
EvaluatingConstants.Clear();
ExpandConstant(constant);
}
foreach (var statement in Statements)
{
statement.FieldA = statement.FieldA.ExpandConstants(this);
statement.FieldB = statement.FieldB.ExpandConstants(this);
}
foreach (var statement in Statements)
{
statement.FieldA = new NumberExpression(ModularArith.Mod(statement.FieldA.Calculate(this, address)));
statement.FieldB = new NumberExpression(ModularArith.Mod(statement.FieldB.Calculate(this, address)));
address++;
}
if (StartAddressExpression == null)
{
StartAddress = 0;
}
else
{
StartAddressExpression = StartAddressExpression.ExpandConstants(this);
if (StartAddressExpression.GetType() == typeof(VariableExpression))
{
StartAddress = ModularArith.Mod(Statements.Count + StartAddressExpression.Calculate(this, Statements.Count));
}
else if (StartAddressExpression.GetType() == typeof(NumberExpression))
{
StartAddress = StartAddressExpression.Calculate(this, Statements.Count);
}
else
{
throw new CompilationException("END argument must be label, constant name or number", StartAddressExpression.ToString(), 0);
}
}
}