/// <summary>
/// Called when the item is a table item.
/// </summary>
/// <param name="target">The object that was passed to IParseItem.Visit.</param>
/// <returns>The passed target or a modification of it.</returns>
/// <exception cref="System.ArgumentNullException">If target is null.</exception>
public IParseItem Visit(TableItem target)
{
if (target == null)
throw new ArgumentNullException("target");
var gen = compiler.CurrentGenerator;
var loc = compiler.CreateTemporary(typeof(ILuaValue));
// loc = E.Runtime.CreateTable();
gen.Emit(OpCodes.Ldarg_1);
gen.Emit(OpCodes.Callvirt, typeof(ILuaEnvironment).GetMethod("get_Runtime"));
gen.Emit(OpCodes.Callvirt, typeof(ILuaRuntime).GetMethod("CreateTable"));
gen.Emit(OpCodes.Stloc, loc);
foreach (var item in target.Fields)
{
// Does not need to use SetItemRaw becuase there is no Metatable.
// loc.SetIndex({item.Item1}, {item.Item2});
gen.Emit(OpCodes.Ldloc, loc);
item.Key.Accept(this);
item.Value.Accept(this);
gen.Emit(OpCodes.Callvirt, typeof(ILuaValue).GetMethod("SetIndex"));
}
//! push loc;
gen.Emit(OpCodes.Ldloc, loc);
compiler.RemoveTemporary(loc);
return target;
}
/// <summary>
/// Called when the item is a table item.
/// </summary>
/// <param name="target">The object that was passed to IParseItem.Visit.</param>
/// <returns>The passed target or a modification of it.</returns>
/// <exception cref="System.ArgumentNullException">If target is null.</exception>
public IParseItem Visit(TableItem target)
{
if (target == null)
throw new ArgumentNullException("target");
foreach (var item in target.Fields)
{
item.Key.Accept(this);
item.Value.Accept(this);
}
return target;
}
/// <summary>
/// Reads a table from the input. Input must be either on the starting '{'.
/// </summary>
/// <param name="input">Where to read input from.</param>
/// <param name="token">The token to append the read Tokenm to.</param>
/// <returns>The table that was read.</returns>
protected virtual TableItem ReadTable(ITokenizer input, ref Token token)
{
Token debug = input.Read();
if (debug.Value != "{")
throw new SyntaxException(
string.Format(Resources.TokenInvalidExpecting, debug.Value, "table", "{"),
input.Name, debug);
TableItem ret = new TableItem();
Token last = input.Peek();
while (last.Value != "}")
{
if (last.Value == "[")
{
Read(input, ref debug); // read the "["
var temp = ReadExp(input, ref debug);
if (temp == null)
throw new SyntaxException(string.Format(Resources.InvalidDefinition, "table"),
input.Name, debug);
// read ']'
last = Read(input, ref debug);
if (last.Value != "]")
throw new SyntaxException(
string.Format(Resources.TokenInvalidExpecting, last.Value, "table", "]"),
input.Name, last);
// read '='
last = Read(input, ref debug);
if (last.Value != "=")
throw new SyntaxException(
string.Format(Resources.TokenInvalidExpecting, last.Value, "table", "="),
input.Name, last);
// read the expression
var val = ReadExp(input, ref debug);
if (val == null)
throw new SyntaxException(string.Format(Resources.InvalidDefinition, "table"),
input.Name, debug);
ret.AddItem(temp, val);
}
else
{
var val = ReadExp(input, ref debug);
if (input.Peek().Value == "=")
{
Read(input, ref debug); // read '='
NameItem name = val as NameItem;
if (name == null)
throw new SyntaxException(string.Format(Resources.InvalidDefinition, "table"),
input.Name, debug);
// read the expression
var exp = ReadExp(input, ref debug);
ret.AddItem(new LiteralItem(name.Name), exp);
}
else
{
ret.AddItem(null, val);
}
}
if (input.Peek().Value != "," && input.Peek().Value != ";")
break;
else
Read(input, ref debug);
last = input.Peek();
} // end While
Token end = Read(input, ref debug); // read the "}"
if (end.Value != "}")
throw new SyntaxException(
string.Format(Resources.TokenInvalidExpecting, end.Value, "table", "}"),
input.Name, end);
ret.Debug = debug;
token.Append(debug);
return ret;
}