CommandLineParser: How to catch invalid input to numeric parameter

CommandLineParser

asked 2016-03-11 12:01:38 -0600

Is there a way to know if a user passes invalid input to a numeric argument with CommandLineParser? e.g. if this is my command line:

./app -s=sss

then this code:

markerSize = parser.get<float>("s");

returns 0 and an error message is printed to the console. I need to know the difference between 0 and invalid input. It doesn't throw an exception so I can't use try … catch.

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Comments

did you setup a meaningful default value ? like:

String keys=
    "{fps            | -1.0f | fps for output video }"
    "{s              | -1.0f | marker size            }";
CommandLineParser cmd(argc,argv,keys);

berak ( 2016-03-12 01:49:06 -0600 )edit

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CommandLineParser: How to catch invalid input to numeric parameter

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