Re: [Boost-users] mpl documentation question

AMDG On 04/07/2012 10:47 AM, Robert Ramey wrote:

Vicente J. Botet Escriba wrote:

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Le 07/04/12 09:13, Robert Ramey a écrit :

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Documentation for mpl::less<T> has the following section:

typedef less r; // a

Return type:Integral Constant. Semantics:Equivalent to struct r : less::type {}; //b

if //a is used then the following yields bool_<true>

is_same< less, r>

if // b is used then the following yields bool_<false>

is_same< less, r>

So in what sense are //a and // b equivalent?

<snip> So you agree that the statement above (which appears in the documentation)

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typedef less r; // a

Return type:Integral Constant. Semantics:Equivalent to struct r : less::type {}; //b

is incorrect and misleading?

I'm thinking that it shouldn't even be in the documentation as written. This raises the question as to what the documentation should say about the type "less" ?

is_same doesn't work, but what you can use is mpl::equal_to. mpl::equal_to compares integral constants for equality without requiring the types to match exactly: equal_to, r> -> mpl::true_ In Christ, Steven Watanabe