Handle inf and nan in parameter file parser

[Erik Schnetter]

The test case in CactusTest/TestPar fails because inf is not recognised as number.

Keyword:

[Roland Haas]

@Steven R. Brandt maybe revisit this for piraha?

[Roland Haas]

This would be suitable for an easy (prior Perl knowledge) / medium (no Perl knowledge) hackathon task.

[Steven R. Brandt]

I don’t see a test failure. Maybe something changed?

[Roland Haas]

Not sure if that test ever actually tested for NaNs. At least `git log -G [Nn][Aa][Nn]' does not find anything. There is a test in NaNChecker that had to use some extra code to produce NaNs for it to find in git hash 837d426 "NaNChecker: use internally generated NaNs in test case" of cactusutils .

Should be enough to have a regex looking for nan and [+-]inf where the current regex expects the numeric part I suspect and (possibly) some extra code in the C++ code to convert those to NaN and inf, if that is not automatically done by the routine used to convert real number strings to double values.

[Steven R. Brandt]

So TestPar.par does contain a test with an inf and call.cc does check for inf and nan. The test passes. As near as I can tell, this ticket ought to be closed.

[Roland Haas]

Sure. Steve pointed out (offline communication) that expressions.par in TestPar does indeed contain nan . Somehow git log -G 'nan' does not find it. Closing the ticket since it has already been fixed.

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