Is there a good class of common goals for C ++?

Question

Every time I write another little toy of mine with C ++ toys, I am faced with the need for a small, user-friendly parameter / parameter class. Here is what he should do:

• accept at least ints, double, string parameters
• easy way to add new parameters
• portable, small and fast
• is free
• options for reading from a file and / or command line
• upper and lower bounds of parameters
• and all other useful things that I don’t think about right now.

What I want to do is pass a pointer to this class to the builder and all my strategy objects so that they can read the parameters of the algorithm that I run (for example, which algorithm, maximum number of iterations, etc.)

Can someone point me to an implementation that achieves at least some of these things?

Answer 1

Boost Program-Options is pretty smooth. I think that he does everything that is on your list, except, perhaps, checking the boundaries. But even then you can easily configure custom validators.

Update: . As @stefan rightly points out in the comment, this also fails on the “small”! It adds a pretty significant chunk to your binary if you statically link it.

Answer 2

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