/// <summary>
/// Rule: PowExpr -> UnaryExpr (POW UnaryExpr )* ;
/// </summary>
protected override object EvalPowExpr(ParseTree tree, params object[] paramlist)
{
if (GetNode(TokenType.POW) == null)
{
return((ExpressionBase)GetNode(TokenType.UnaryExpr).Eval(tree));
}
var expressions = new Stack <ExpressionBase>(nodes.OfTokenType(TokenType.UnaryExpr).Select(n => n.Eval(tree)).Cast <ExpressionBase>().Reverse());
var operations = new Stack <string>(nodes.OfTokenType(TokenType.POW).Select(x => x.Token.Text).Reverse());
while (expressions.Count > 1)
{
var leftExpr = expressions.Pop();
var rightExpr = expressions.Pop();
var newExpr = new MultPowExpr
{
First = leftExpr,
Second = rightExpr,
Node = this,
OperationText = operations.Pop()
};
expressions.Push(newExpr);
}
return(expressions.First());
}
public dynamic Visit(MultPowExpr expr)
{
var left = _codeGen.Local(Visit((dynamic)expr.First)) as Operand;
var right = _codeGen.Local(Visit((dynamic)expr.Second)) as Operand;
switch (expr.Type)
{
case MultPowDivType.Mult:
return(left * right);
case MultPowDivType.Div:
var d = _assemblyGen.StaticFactory.Invoke(typeof(Convert), "ToDouble", left);
return(d / right);
case MultPowDivType.IntDiv:
var res = left / right;
return(_assemblyGen.StaticFactory.Invoke(typeof(Convert), "ToInt32", res));
case MultPowDivType.Mod:
return(left.Modulus(right));
case MultPowDivType.Pow:
return(_assemblyGen.StaticFactory.Invoke(typeof(Math), "Pow", left, right));
default:
throw new ArgumentOutOfRangeException();
}
}
public dynamic Visit(MultPowExpr expr)
{
var node = Visit((ExpressionBase)expr);
node.Text = expr.Type.ToString();
return(node);
}
public dynamic Visit(MultPowExpr expr)
{
Visit((ExpressionBase)expr);
if (OptimizeMode.ExpressionSimplify)
{
var left = expr.First as LiteralExpr;
var right = expr.Second as LiteralExpr;
if (left != null && right != null)
{
var literal = new LiteralExpr {
Namespace = expr.Namespace, Node = expr.Node, SymbolType = expr.GetExprType()
};
dynamic result;
switch (expr.Type)
{
case MultPowDivType.Mult:
result = left.Value * right.Value;
break;
case MultPowDivType.Div:
result = (double)left.Value / right.Value;
break;
case MultPowDivType.IntDiv:
result = left.Value / right.Value;
break;
case MultPowDivType.Mod:
result = left.Value % right.Value;
break;
case MultPowDivType.Pow:
result = Math.Pow(left.Value, right.Value);
break;
default:
throw new ArgumentOutOfRangeException();
}
if (literal.SymbolType == SymbolType.Integer)
{
result = Convert.ToInt32(result);
}
literal.Value = result;
return(literal);
}
}
return(expr);
}
public dynamic Visit(MultPowExpr expr)
{
if (expr.Types.Contains(SymbolType.Bool) || expr.Types.Contains(SymbolType.String))
{
throw new ParseException(
$"Невозможно произвести операцию между типами {expr.FirstType} и {expr.SecondType}",
expr.Node);
}
if (expr.Type == MultPowDivType.Div)
{
return(SymbolType.Double);
}
if (expr.Type == MultPowDivType.IntDiv)
{
return(SymbolType.Integer);
}
if (expr.Types.Contains(SymbolType.Double))
{
return(SymbolType.Double);
}
return(SymbolType.Integer);
}
public dynamic Visit(MultPowExpr expr)
{
Visit((ExpressionBase)expr);
return(null);
}
