protected override Expression VisitChildren(ExpressionVisitor visitor)
{
Expression newContext = visitor.Visit(_newContext);
Expression body = visitor.Visit(_body);
if (newContext == _newContext && body == _body)
{
return(this);
}
return(Utils.CodeContextScope(body, newContext));
}
private Expression MakeBody()
{
Expression body = _body;
// wrap a CodeContext scope if needed
if (!_global && !DoNotAddContext)
{
var vars = new List <ParameterExpression>(_visibleVars.Count);
foreach (var v in _visibleVars)
{
if (EmitDictionary || v.Value)
{
vars.Add(v.Key);
}
}
if (vars.Count > 0)
{
body = Utils.CodeContextScope(
body,
Expression.Call(
typeof(RuntimeHelpers).GetMethod("CreateNestedCodeContext"),
Utils.VariableDictionary(vars),
Utils.CodeContext(),
Expression.Constant(_visible)
)
);
}
}
// wrap a scope if needed
if (_locals != null && _locals.Count > 0)
{
body = Expression.Block(new ReadOnlyCollection <ParameterExpression>(_locals.ToArray()), body);
}
return(body);
}
