I sometimes need to make approximate string matching, i.e. to know whether to strings are close, without being identical. There are methods to do that, see "Approximate String Matching", Levenshtein's algorithm for strings distance, ASM, Ukkonen, Boyer-Moore algorithms, etc... I would like to know if there is a plan to provide this kind of feature in Boost, maybe with the regular expression library or the string algorithms. Thanks !

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I would like to ask if there is a way to evaluate, in compile time, the existence of a specific constructor, except from the constructor default and copy constructor (I know the functions has_trivial_constructor and has_trivial_copy from the type_traits library). For example in the following code, I would like to evaluate the existence of both "A(const Config& config)"

You can do something like this with is_convertible

Thank you Dave, it works perfect. If the constructor takes one paramater it can be used , but in the case of two or more parameters?? Is it possible to evaluate, in compile time, the existence of a certain member function in a class? Thank you in advance, Yutaka Leon Suematsu

"Yutaka Leon Suematsu" writes:

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I would like to ask if there is a way to evaluate, in compile time, the existence of a specific constructor, except from the constructor default and copy constructor (I know the functions has_trivial_constructor and has_trivial_copy from the type_traits library). For example in the following code, I would like to evaluate the existence of both "A(const Config& config)"

You can do something like this with is_convertible

Thank you Dave, it works perfect.

If the constructor takes one paramater it can be used , but in the case of two or more parameters??

Your out of luck.

Is it possible to evaluate, in compile time, the existence of a certain member function in a class?

Yep. If you know both the name and exact signature, you use SFINAE with the member function pointer. -- Dave Abrahams Boost Consulting www.boost-consulting.com

Noel Yap writes:

David Abrahams wrote:

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"Yutaka Leon Suematsu" writes:

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Is it possible to evaluate, in compile time, the existence of a certain member function in a class? Yep. If you know both the name and exact signature, you use SFINAE with the member function pointer.

Could you give or point us to an example, please?

There are a couple here: http://tinyurl.com/4g5ce -- Dave Abrahams Boost Consulting www.boost-consulting.com