/// <summary>Converts the parameters to a constant day expression </summary>
/// <param name="expr">The function call expressions</param>
public object ToRelativeDay(BindingCallExpr expr)
{
var day = Convert.ToInt32(expr.ParamList[0]);
var time = (string)expr.ParamList[1];
var token = expr.ParamList[2] as TokenData;
var dayName = _data.LookupDayName(day);
return Exprs.Day(dayName, time, token);
}
/// <summary>Converts the parameters to a constant date expression </summary>
/// <param name="expr">The function call expressions</param>
public object ToConstantDate(BindingCallExpr expr)
{
var month = Convert.ToInt32(expr.ParamList[0]);
var day = Convert.ToInt32(expr.ParamList[1]);
var year = Convert.ToInt32(expr.ParamList[2]);
var time = (string)expr.ParamList[3];
var token = expr.ParamList[4] as TokenData;
return Exprs.Date(month, day, year, time, token);
}
/// <summary>Converts the parameters to a constant date time token </summary>
/// <param name="expr">The function call expressions</param>
public object ToConstantDateTimeToken(BindingCallExpr expr)
{
var date = expr.ParamList[0] as TokenData;
var time = expr.ParamList[1] as TokenData;
var d = (DateTime)date.Token.Value;
var t = (TimeSpan)time.Token.Value;
var datetime = new DateTime(d.Year, d.Month, d.Day, t.Hours, t.Minutes, t.Seconds);
var text = date.Token.Text + " " + time.Token.Text;
var token = date.Token.Clone();
token.SetTextAndValue(text, datetime);
return token;
}
public static Expr BindingCall(string bindingName, string functionName, TokenData token)
{
var bexpr = new BindingCallExpr();
bexpr.Name = functionName;
bexpr.FullName = "sys." + bindingName + "." + functionName;
bexpr.ParamListExpressions = new List<Expr>();
bexpr.ParamList = new List<object>();
return bexpr;
}
/// <summary>
/// Executes a call to a language binding class.
/// </summary>
/// <param name="expr"></param>
/// <returns></returns>
public object VisitBindingCall(BindingCallExpr expr)
{
var method = expr.Name;
// 1. Resolve the parameters.
ParamHelper.ResolveParametersToHostLangValues(expr.ParamListExpressions, expr.ParamList, this);
// 2. Push call into stack
expr.Ctx.State.Stack.Push(expr.FullName, null);
// 3. Call language binding method/function.
var binding = new MetaCompiler();
binding.Ctx = expr.Ctx;
var result = binding.ExecuteFunction(method, new object[] { expr });
result = FunctionHelper.CheckConvert(result);
// 4. Pop the call stack
expr.Ctx.State.Stack.Pop();
return result;
}
/// <summary>Converts the parameters to a constant day expression </summary>
/// <param name="expr">The function call expressions</param>
public object ToRelativeDate(BindingCallExpr expr)
{
var relativeDay = (string)(expr.ParamList[0]);
var dayOfWeek = Convert.ToInt32(expr.ParamList[1]);
var month = Convert.ToInt32(expr.ParamList[2]);
var token = expr.ParamList[3] as TokenData;
return Exprs.DateRelative(relativeDay, dayOfWeek, month, token);
}
/// <summary>
/// Creates a constant string
/// </summary>
/// <param name="expr"></param>
/// <returns></returns>
public object ToConstantString(BindingCallExpr expr)
{
var text = expr.ParamList[0] as TokenData;
var token = expr.ParamList[1] as TokenData;
return Exprs.Const(new LString(text.Token.Text), token);
}
/// <summary>
/// Creates a constant number
/// </summary>
/// <param name="expr"></param>
/// <returns></returns>
public object ToConstantNumber(BindingCallExpr expr)
{
var num = Convert.ToDouble(expr.ParamList[0]);
var token = expr.ParamList[1] as TokenData;
return Exprs.Const(new LNumber(num), token);
}
public object ToTable(BindingCallExpr expr)
{
var fields = expr.ParamList[0] as List<object>;
var fieldNames = new List<string>();
foreach(var obj in fields)
{
fieldNames.Add(Convert.ToString(obj));
}
var start = expr.ParamList[1] as TokenData;
var exp = Exprs.Table(fieldNames, start);
return exp;
}
public object ToEnumerableLoop(BindingCallExpr expr)
{
var token = expr.ParamList[2] as TokenData;
var varname = (string)expr.ParamList[0];
var enableWith = (bool)expr.ParamList[1];
var collectionName = varname + "s";
var varExpr = Exprs.Ident(collectionName, token);
var loopexpr = Exprs.ForEach(varname, varExpr, token);
((BlockExpr)loopexpr).EnableAutoVariable = enableWith;
return loopexpr;
}
/// <summary>
/// Creates a constant string
/// </summary>
/// <param name="expr"></param>
/// <returns></returns>
public object ToListCheck(BindingCallExpr expr)
{
var name = expr.ParamList[0] as TokenData;
var token = expr.ParamList[1] as TokenData;
return Exprs.ListCheck(name, token);
}
/// <summary>Converts the parameters to a constant day expression </summary>
/// <param name="expr">The function call expressions</param>
public object ToDuration(BindingCallExpr expr)
{
var duration = (string)(expr.ParamList[0]);
var type = (string) expr.ParamList[1];
var token = expr.ParamList[2] as TokenData;
return Exprs.Duration(duration, type, token);
}
public object VisitBindingCall(BindingCallExpr expr)
{
return null;
}
