} // ctor
public override DynamicMetaObject FallbackGetIndex(DynamicMetaObject target, DynamicMetaObject[] indexes, DynamicMetaObject errorSuggestion)
{
// Defer the parameters
if (!target.HasValue || indexes.Any(c => !c.HasValue))
{
return(Defer(target, indexes));
}
Expression expr;
if (target.Value == null)
{
if (errorSuggestion != null)
{
return(errorSuggestion);
}
expr = ThrowExpression(Properties.Resources.rsNullReference, ReturnType);
}
else
{
try
{
expr = Lua.EnsureType(LuaEmit.GetIndex(lua, target, indexes, mo => mo.Expression, mo => mo.LimitType, false), ReturnType);
}
catch (LuaEmitException e)
{
if (errorSuggestion != null)
{
return(errorSuggestion);
}
expr = ThrowExpression(e.Message, ReturnType);
}
}
return(new DynamicMetaObject(expr, GetMethodSignatureRestriction(target, indexes)));
} // func FallbackGetIndex
} // func MemberSetExpression
private static Expression IndexGetExpression(Scope scope, Token tStart, Expression instance, Expression[] indexes)
{
if (instance.Type == typeof(LuaTable))
{
if (indexes.Length == 1)
{
var arg = indexes[0];
if (LuaTable.IsIndexKey(arg.Type)) // integer access
{
return(MemberGetSandbox(
scope,
Expression.Call(instance, Lua.TableGetValueKeyIntMethodInfo,
ConvertExpression(scope.Runtime, tStart, arg, typeof(int)),
Expression.Constant(false)
),
instance, null
));
}
else if (arg.Type == typeof(string)) // member access
{
return(MemberGetSandbox(
scope,
Expression.Call(instance, Lua.TableGetValueKeyStringMethodInfo,
arg,
Expression.Constant(false),
Expression.Constant(false)
),
instance, null
));
}
else // key access
{
return(MemberGetSandbox(
scope,
Expression.Call(instance, Lua.TableGetValueKeyObjectMethodInfo,
ConvertObjectExpression(scope.Runtime, tStart, arg, true),
Expression.Constant(false)
),
instance, null
));
}
}
else
{
return(MemberGetSandbox(
scope,
Expression.Call(instance, Lua.TableGetValueKeyListMethodInfo,
Expression.NewArrayInit(typeof(object), from i in indexes select ConvertObjectExpression(scope.Runtime, tStart, i, true)),
Expression.Constant(false)
),
instance, null
));
}
}
else if (instance.Type == typeof(LuaResult) && indexes.Length == 1)
{
return(MemberGetSandbox(
scope,
Expression.MakeIndex(
instance,
Lua.ResultIndexPropertyInfo,
new Expression[] { ConvertExpression(scope.Runtime, tStart, indexes[0], typeof(int)) }
),
instance, null
));
}
else
{
return(MemberGetSandbox(scope, SafeExpression(() => LuaEmit.GetIndex(scope.Runtime, instance, indexes, getExpressionFunction, getExpressionTypeFunction, true), tStart), instance, null));
}
} // func IndexGetExpression
