R-team, The $value element of the return value of *withVisible* does not agree with the return value of *eval* when *withVisible* is passed a variable (symbol) containing an expression object or anonymous code/expressions which generates an expression object when evaluated (such as calls to *parse* or * expression*).
I have attached a patch against the svn trunk which addresses this. Example (under devel r63577): > withVisible(parse(text="5+pi")) $value *expression(5+pi)* $visible [1] TRUE > eval(parse(text="5+pi")) *[1] 8.141593* With the attached patch this is no longer the case: > withVisible(parse(text="5+pi")) $value *[1] 8.141593* $visible [1] TRUE The patch changes only the withVisible function in eval.c. I'm happy to work with / at the direction of an R-core member to get the patch into an different form/coding style/fix strategy/etc if its current form is not acceptable. Thanks, ~G > sessionInfo() R Under development (unstable) (2013-08-14 r63577) Platform: x86_64-unknown-linux-gnu (64-bit) locale: [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 [5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 [7] LC_PAPER=en_US.UTF-8 LC_NAME=C [9] LC_ADDRESS=C LC_TELEPHONE=C [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base -- Gabriel Becker Graduate Student Statistics Department University of California, Davis
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