[Users] output parameter format

[Erik Schnetter]

The official syntax for variable names is to use the implementation
name for public groups and the thorn name for private groups. Not all
errors are detected. I assume that the special code that handles
vector indices for variable names doesn't allow using a thorn name for
a public variable.

You could open a Trac ticket for this.

-erik

On Fri, Nov 4, 2011 at 4:10 AM, Luca Baiotti <baiotti at ile.osaka-u.ac.jp> wrote:
> Hello,
>
> the request for output of a variable in Carpet (CarpetIOBasic,
> CarpetIOScalar, CarpetIOASCII) can be done in a parfile as, e.g.,
>
> IOASCII::out1D_vars  = "THORN_NAME::VARIABLE_GROUP_NAME"
>
> or
>
> IOASCII::out1D_vars  = "IMPLEMENTATION_NAME::VARIABLE_GROUP_NAME"
>
> or
>
> IOASCII::out1D_vars  = "THORN_NAME::VARIABLE_NAME"
>
> or
>
> IOASCII::out1D_vars  = "IMPLEMENTATION_NAME::VARIABLE_NAME"
>
> Any of the above should work (correct me if I am wrong), but I found an
> exception:
>
> When requesting output as
>
> IOASCII::out1D_vars  = "TestOutput::testoutput"
>
> for a *public:* or *protected:* variable group of the type:
>
> CCTK_REAL testoutput[nvar] type=GF TimeLevels=1 Dim=3
> {
>  output
> } ""
>
> where nvar is an integer parameter and the thorn name is TestOutput and
> differs from the implementation name, Carpet complains that
>
> WARNING[L1,P0] (Cactus): CCTK_TraverseString: invalid group/variable name
> 'TestOutput::testoutput' in traversed string 'TestOutput::testoutput'
> WARNING level 0 in thorn IOUtil processor 0 host mbaiotti2-2.local
>  (line 140 of
> /Users/baiotti/Cactus.fresh-checkout/arrangements/CactusBase/IOUtil/src/Utils.c):
>  -> error while parsing parameter 'IOBasic::outInfo_vars'
>
> For *private:* arrays of variables it works.
>
> I attach an example thorn and parfile.
>
> Comments?
>
> Luca
>
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-- 
Erik Schnetter <schnetter at cct.lsu.edu>   http://www.cct.lsu.edu/~eschnett/