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OpenCMISS / iron

Source code repository for OpenCMISS-Iron
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Use of Fortran 2008 Features #59

Open chrispbradley opened 7 years ago

chrispbradley commented 7 years ago

Issue for the discussion of what Fortran 2008 features can be used in OpenCMISS. In general, the use of language features depends on performance implications and the support of that feature by the various Fortran compilers. A useful summary of Fortran language features that have been implemented by the various compilers can be found here:

http://fortranwiki.org/fortran/show/Fortran+2008+status

beauof commented 7 years ago

I would vote for using the Fortran 2008 feature NEWUNIT to obtain and open a file unit which is unused. It is supported by all major compilers.

Syntax: OPEN(NEWUNIT=NodeFileUnit, FILE=CHAR(VFilename)//".NODE", ACTION="read")

chrispbradley commented 7 years ago

I have no issue with allowing the use of NEWUNIT. The GNU, Intel, Cray, NAG and PGI compilers support this (which is pretty much all the ones we might care about). I'm not aware of any performance implications with this. Anybody else have any objections?