async Task ProcessCanonicalForAsync(ParsingScript script, string forString)
{
string[] forTokens = forString.Split(Constants.END_STATEMENT);
if (forTokens.Length != 3)
{
throw new ArgumentException("Expecting: for(init; condition; loopStatement)");
}
int startForCondition = script.Pointer;
ParsingScript initScript = new ParsingScript(forTokens[0] + Constants.END_STATEMENT);
ParsingScript condScript = new ParsingScript(forTokens[1] + Constants.END_STATEMENT);
ParsingScript loopScript = new ParsingScript(forTokens[2] + Constants.END_STATEMENT);
initScript.ParentScript = script;
condScript.ParentScript = script;
loopScript.ParentScript = script;
await initScript.ExecuteFromAsync(0);
int cycles = 0;
bool stillValid = true;
while (stillValid)
{
Variable condResult = await condScript.ExecuteFromAsync(0);
stillValid = Convert.ToBoolean(condResult.Value);
if (!stillValid)
{
break;
}
if (MAX_LOOPS > 0 && ++cycles >= MAX_LOOPS)
{
throw new ArgumentException("Looks like an infinite loop after " +
cycles + " cycles.");
}
script.Pointer = startForCondition;
Variable result = await ProcessBlockAsync(script);
if (result.IsReturn || result.Type == Variable.VarType.BREAK)
{
//script.Pointer = startForCondition;
//SkipBlock(script);
//return;
break;
}
await loopScript.ExecuteFromAsync(0);
}
script.Pointer = startForCondition;
SkipBlock(script);
}
