John Chambers wrote:
> A recent revision (svn version 39077) has introduced an internal flag (a
> bit in the C structure) that is turned on by the code that generates
> objects from an S4 class.
>
> There are corresponding tests for an S4 object, isS4() in R and
> IS_S4_OBJECT() in C. These
A recent revision (svn version 39077) has introduced an internal flag (a
bit in the C structure) that is turned on by the code that generates
objects from an S4 class.
There are corresponding tests for an S4 object, isS4() in R and
IS_S4_OBJECT() in C. These are fast and reliable, and should r
