public Expr Multiply(MultiplyExpr multi)
{
var tail = multi.Tail();
var expr1 = Builder.Multiply(multi.Args.First().Visit(this), tail);
var expr2 = Builder.Multiply(multi.Args.First(), tail.Visit(this));
return Builder.Add(expr1, expr2);
}
protected IType CheckExpr(MultiplyExpr expr)
{
IType a = CheckExpr(expr.Expr1);
IType b = CheckExpr(expr.Expr2);
if (!(a is NumericType) || !a.CompatibleWith(b))
{
AddError(String.Format("Multiplication not possible. Incompatible types: '{0}', '{1}'. Only numeric types are supported.",
a.ToString(), b.ToString()), true, expr.SourcePosition);
return NumericType.Instance;
}
return (a is RealType || b is RealType) ? (IType)RealType.Instance : (IType)IntType.Instance;
}
public Number Multiply(MultiplyExpr multi)
{
return EvaluateMulti(multi, (x1, x2) => x1 * x2);
}
