On 2008 May 10, at 21:46, John M. Dlugosz wrote:
In S06, what is the difference between "is ref" and "is rw"? The
text says that the rw may be converted to an lvalue, and that ref
must already be. But what is that supposed to mean?
At a guess, "is rw" makes a parameter variable into a local read/write
variable initialized with the parameter value. Changes to it are not
reflected in the caller.
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] [EMAIL PROTECTED]
system administrator [openafs,heimdal,too many hats] [EMAIL PROTECTED]
electrical and computer engineering, carnegie mellon university KF8NH