/// <summary>
/// Executes the chunk
/// </summary>
/// <param name="isBreak">whether to break execution</param>
/// <returns></returns>
public LuaValue Execute(out bool isBreak)
{
foreach (Statement statement in Statements)
{
ReturnStmt returnStmt = statement as ReturnStmt;
if (returnStmt != null)
{
isBreak = false;
return(LuaMultiValue.WrapLuaValues(returnStmt.ExprList.ConvertAll(expr => expr.Evaluate(this.Enviroment)).ToArray()));
}
else if (statement is BreakStmt)
{
isBreak = true;
return(null);
}
else
{
var returnValue = statement.Execute(this.Enviroment, out isBreak);
if (returnValue != null || isBreak == true)
{
return(returnValue);
}
}
}
isBreak = false;
return(null);
}
private ReturnStmt ParseReturnStmt(out bool success)
{
var reskey = new Tuple<int, string>(position, "ReturnStmt");
if (ParsingResults.ContainsKey(reskey))
{
var parsingResult = ParsingResults[reskey];
success = parsingResult.Item2;
position = parsingResult.Item3;
return parsingResult.Item1 as ReturnStmt;
}
int errorCount = Errors.Count;
ReturnStmt returnStmt = new ReturnStmt();
int start_position = position;
MatchTerminalString("return", out success);
if (!success)
{
position = start_position;
ParsingResults[reskey] = new Tuple<object, bool, int>(returnStmt, success, position);return returnStmt;
}
ParseSpReq(out success);
if (!success)
{
Error("Failed to parse SpReq of ReturnStmt.");
position = start_position;
ParsingResults[reskey] = new Tuple<object, bool, int>(returnStmt, success, position);return returnStmt;
}
returnStmt.ExprList = ParseExprList(out success);
success = true;
ParsingResults[reskey] = new Tuple<object, bool, int>(returnStmt, success, position);
return returnStmt;
}