addCommandLineParam<MooseEnum> doesn't work as intended

[pak1sol]

Bug Description

When a MooseEnum type variable is used in params.addCommandLineParam<MooseEnum>, it seems that the command line argument cannot be properly recognized; always the default value is used no matter what value is typed in via the command line argument. Only params.addCommandLineParam<std::string> works as intended.

Steps to Reproduce

For a code snippet below,

params.addCommandLineParam<MooseEnum>("mooseenum_test", "--mooseenum-test", mooseenumTest(), "description");
...
MooseEnum test = getParam<MooseEnum>("mooseenum_test");

where

MooseEnum
mooseenumTest()
{
  return MooseEnum("a b c", "a");
}

Running below gives me a in the test variable. No matter what value is given in the command argument, always the default value is written to test.

xxx-opt --mooseenum-test b

The way to get it to work as intended is to accept the variable using the string as below.

params.addCommandLineParam<std::string>("mooseenum_test", "--mooseenum-test", mooseenumTest(), "description");
...
std::string test = getParam<std::string>("mooseenum_test");

[pak1sol]

@YaqiWang @permcody

[lindsayad]

@pak1sol can you see whether #26764 takes care of your needs?

[pak1sol]

@pak1sol can you see whether #26764 takes care of your needs?

Yes, it does! Thank you!