Simple class with an automatic printing issue

-----Original Message-----
From: r-devel-bounces at r-project.org 
[mailto:r-devel-bounces at r-project.org] On Behalf Of Tom Short
Sent: Sunday, April 12, 2009 4:00 PM
To: r-devel at r-project.org
Subject: [Rd] Simple class with an automatic printing issue

I don't understand the following behavior for a simple S3 class. The
auto-printing at the command line
doesn't behave as I expect. I'm probably missing something, 
but it might be
a bug.

print.testClass <- function(x, ...) cat("Class:", class(x), 

":", x, "\n")

structure(1, class = "testClass")

Class: testClass : 1

print(1 * structure(1, class = "testClass"))

Class: testClass : 1

1 * structure(1, class = "testClass") # why doesn't 

auto-printing call
print.testClass here?
[1] 1
attr(,"class")
[1] "testClass"

structure(1, class = "testClass") * 1

Class: testClass : 1


platform       i386-pc-mingw32
arch           i386
os             mingw32
system         i386, mingw32
status         RC
major          2
minor          9.0
year           2009
month          04
day            10
svn rev        48318
language       R
version.string R version 2.9.0 RC (2009-04-10 r48318)

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