private LNumber IncrementNumber(LNumber val)
{
this.DataType = typeof(double);
var inc = this.Increment == 0 ? 1 : this.Increment;
if (this.Expression != null)
{
var incval = this.Expression.Evaluate();
// TODO: Check if null and throw langexception?
inc = ((LNumber)incval).Value;
}
// 1. Calculate the unary value
val = EvalHelper.CalcUnary(val, Op, inc);
// 2. Set the value back into scope
this.Value = val;
this.Ctx.Memory.SetValue(this.Name, val);
return val;
}
/// <summary>
/// Evalulates a math expression of 2 numbers.
/// </summary>
/// <param name="node">The AST node the evaluation is a part of.</param>
/// <param name="lhs">The number on the left hand side</param>
/// <param name="rhs">The number on the right hand side</param>
/// <param name="op">The math operator.</param>
/// <returns></returns>
public static LNumber CalcNumbers(AstNode node, LNumber lhs, LNumber rhs, Operator op)
{
var left = lhs.Value;
var right = rhs.Value;
var result = 0.0;
if (op == Operator.Multiply)
{
result = left * right;
}
else if (op == Operator.Divide)
{
result = left / right;
}
else if (op == Operator.Add)
{
result = left + right;
}
else if (op == Operator.Subtract)
{
result = left - right;
}
else if (op == Operator.Modulus)
{
result = left % right;
}
return new LNumber(result);
}
/// <summary>
/// Increments the number supplied.
/// </summary>
/// <param name="num"></param>
/// <param name="op"></param>
/// <param name="increment"></param>
/// <returns></returns>
public static LNumber CalcUnary(LNumber num, Operator op, double increment)
{
var val = num.Value;
if (op == Operator.PlusPlus)
{
val++;
}
else if (op == Operator.MinusMinus)
{
val--;
}
else if (op == Operator.PlusEqual)
{
val = val + increment;
}
else if (op == Operator.MinusEqual)
{
val = val - increment;
}
else if (op == Operator.MultEqual)
{
val = val * increment;
}
else if (op == Operator.DivEqual)
{
val = val / increment;
}
return new LNumber(val);
}
/// <summary>
/// Evaluates a math expression of 2 time spans.
/// </summary>
/// <param name="node">The AST node the evaluation is a part of.</param>
/// <param name="lhs">The time on the left hand side</param>
/// <param name="rhs">The time on the right hand side</param>
/// <param name="op">The math operator.</param>
/// <returns></returns>
public static LBool CompareNumbers(AstNode node, LNumber lhs, LNumber rhs, Operator op)
{
var left = lhs.Value;
var right = rhs.Value;
var result = false;
if (op == Operator.LessThan) result = left < right;
else if (op == Operator.LessThanEqual) result = left <= right;
else if (op == Operator.MoreThan) result = left > right;
else if (op == Operator.MoreThanEqual) result = left >= right;
else if (op == Operator.EqualEqual) result = left == right;
else if (op == Operator.NotEqual) result = left != right;
return new LBool(result);
}
public static LNumber IncrementNumber(UnaryExpr expr, LNumber val, IAstVisitor visitor)
{
var inc = expr.Increment == 0 ? 1 : expr.Increment;
if (expr.Expression != null)
{
var incval = expr.Expression.Evaluate(visitor);
// TODO: Check if null and throw langexception?
inc = ((LNumber)incval).Value;
}
// 1. Calculate the unary value
val = ComLib.Lang.Runtime.EvalHelper.CalcUnary(val, expr.Op, inc);
// 2. Set the value back into scope
expr.Ctx.Memory.SetValue(expr.Name, val);
return val;
}
