static LuaArguments EvalNumericFor(NumericFor stat, LuaContext Context, out LuaReturnStatus returned)
{
returned.broke = false;
returned.returned = false;
var varList = EvalExpression(stat.Var, Context);
var limitList = EvalExpression(stat.Limit, Context);
var stepList = EvalExpression(stat.Step, Context);
var var = LuaEvents.toNumber(varList[0]);
var limit = LuaEvents.toNumber(limitList[0]);
var step = LuaEvents.toNumber(stepList[0]);
if (!(var & limit & step).AsBool())
{
throw new LuaException("Error in for loop");
}
LuaContext ctx = new LuaContext(Context);
while ((step > 0 & var <= limit) | (step <= 0 & var >= limit))
{
ctx.SetLocal(stat.Variable, var);
LuaArguments obj = EvalBlock(stat.Block, ctx, out returned);
if (returned.broke)
{
break;
}
if (returned.returned)
{
return(obj);
}
var = var + step;
}
return(Lua.Return());
}
static LuaArguments EvalRepeat(RepeatStat stat, LuaContext Context, out LuaReturnStatus returned)
{
returned.returned = false;
returned.broke = false;
LuaContext ctx = new LuaContext(Context);
while (true)
{
LuaArguments obj = EvalBlock(stat.Block, ctx, out returned);
if (returned.broke)
{
break;
}
if (returned.returned)
{
return(obj);
}
LuaObject cond = EvalExpression(stat.Condition, ctx)[0];
if (cond)
{
break;
}
}
return(Lua.Return());
}
static LuaArguments EvalWhile(WhileStat stat, LuaContext Context, out LuaReturnStatus returned)
{
returned.returned = false;
returned.broke = false;
LuaObject cond = EvalExpression(stat.Condition, Context)[0];
LuaContext ctx = new LuaContext(Context);
while (cond.AsBool())
{
LuaArguments obj = EvalBlock(stat.Block, ctx, out returned);
if (returned.broke)
{
break;
}
if (returned.returned)
{
return(obj);
}
else
{
cond = EvalExpression(stat.Condition, Context)[0];
}
}
return(Lua.Return());
}
static LuaArguments EvalIf(IfStat stat, LuaContext Context, out LuaReturnStatus returned)
{
returned.broke = false;
returned.returned = false;
LuaArguments obj = new LuaObject[] { LuaObject.Nil };
if (EvalExpression(stat.Condition, Context)[0].AsBool())
{
LuaContext ctx = new LuaContext(Context);
obj = EvalBlock(stat.Block, ctx, out returned);
}
else
{
bool found = false;
foreach (IfStat branch in stat.ElseIfs)
{
if (EvalExpression(branch.Condition, Context)[0].AsBool())
{
LuaContext ctx = new LuaContext(Context);
obj = EvalBlock(stat.Block, ctx, out returned);
found = true;
break;
}
}
if (!found && stat.ElseBlock != null)
{
LuaContext ctx = new LuaContext(Context);
obj = EvalBlock(stat.ElseBlock, ctx, out returned);
}
}
return(obj);
}
static LuaArguments EvalGenericFor(GenericFor stat, LuaContext Context, out LuaReturnStatus returned)
{
returned.broke = false;
returned.returned = false;
LuaArguments args = null;
foreach (IExpression expr in stat.Expressions)
{
if (args == null)
{
args = EvalExpression(expr, Context);
}
else
{
args.Concat(EvalExpression(expr, Context));
}
}
LuaObject f = args[0], s = args[1], var = args[2];
LuaContext ctx = new LuaContext(Context);
while (true)
{
LuaArguments res = f.Call(s, var);
for (int i = 0; i < stat.Variables.Count; i++)
{
ctx.SetLocal(stat.Variables[i], res[i]);
}
if (res[0].IsNil)
{
break;
}
var = res[0];
LuaArguments obj = EvalBlock(stat.Block, ctx, out returned);
if (returned.broke)
{
break;
}
if (returned.returned)
{
return(obj);
}
}
return(Lua.Return());
}
internal static LuaArguments EvalBlock(Block Block, LuaContext Context, out LuaReturnStatus returned)
{
returned.broke = false;
returned.returned = false;
LuaArguments obj = new LuaObject[] { LuaObject.Nil };
foreach (IStatement stat in Block.Statements)
{
if (stat is Assignment)
{
Assignment assign = stat as Assignment;
LuaArguments values = null;
foreach (IExpression expr in assign.Expressions)
{
if (values == null)
{
values = EvalExpression(expr, Context);
}
else
{
values.Concat(EvalExpression(expr, Context));
}
}
for (int i = 0; i < assign.Variables.Count; i++)
{
SetAssignable(assign.Variables[i], values[i], Context);
}
}
else if (stat is LocalAssignment)
{
LocalAssignment assign = stat as LocalAssignment;
LuaArguments values = null;
foreach (IExpression expr in assign.Values)
{
if (values == null)
{
values = EvalExpression(expr, Context);
}
else
{
values.Concat(EvalExpression(expr, Context));
}
}
for (int i = 0; i < assign.Names.Count; i++)
{
Context.SetLocal(assign.Names[i], values[i]);
}
}
else if (stat is ReturnStat)
{
ReturnStat ret = stat as ReturnStat;
returned.returned = true;
List <LuaObject> values = new List <LuaObject>();
int i = 0;
foreach (IExpression expr in ret.Expressions)
{
if (i == ret.Expressions.Count - 1)
{
values.AddRange(EvalExpression(expr, Context));
}
else
{
values.Add(EvalExpression(expr, Context)[0]);
}
i++;
}
return(values.ToArray());
}
else if (stat is FunctionCall)
{
FunctionCall call = stat as FunctionCall;
EvalFunctionCall(call, Context);
}
else if (stat is Block)
{
Block block = stat as Block;
LuaContext ctx = new LuaContext(Context);
obj = EvalBlock(block, ctx, out returned);
if (returned.returned)
{
return(obj);
}
}
else if (stat is IfStat)
{
obj = EvalIf(stat as IfStat, Context, out returned);
if (returned.returned)
{
return(obj);
}
}
else if (stat is WhileStat)
{
obj = EvalWhile(stat as WhileStat, Context, out returned);
if (returned.returned)
{
return(obj);
}
}
else if (stat is RepeatStat)
{
obj = EvalRepeat(stat as RepeatStat, Context, out returned);
if (returned.returned)
{
return(obj);
}
}
else if (stat is BreakStat)
{
returned.returned = false;
returned.broke = true;
return(Lua.Return(LuaObject.Nil));
}
else if (stat is NumericFor)
{
obj = EvalNumericFor(stat as NumericFor, Context, out returned);
if (returned.returned)
{
return(obj);
}
}
else
{
obj = EvalGenericFor(stat as GenericFor, Context, out returned);
if (returned.returned)
{
return(obj);
}
}
}
return(obj);
}
