[jira] [Created] (MATH-945) add log10 to RealFieldElement interface

["Luc Maisonobe (JIRA)" <ji...@apache.org>]

Luc Maisonobe created MATH-945:
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             Summary: add log10 to RealFieldElement interface
                 Key: MATH-945
                 URL: https://issues.apache.org/jira/browse/MATH-945
             Project: Commons Math
          Issue Type: Improvement
    Affects Versions: 3.2
            Reporter: Luc Maisonobe
            Priority: Trivial
             Fix For: 4.0


When the RealFieldElement interface has been set up for 3.2, it appeared the log10 method could not be declared properly. Its return type should have been T (the parameter type for the interface), and indeed this is what Decimal64.log10() and DerivativeStructure.log10() return. However, the Dfp class already had a log10 method that returned an int and not a Dfp.

So declaring this method at the interface level would have lead to change the return type for the Dfp.log10() method from int to Dfp, and this was an incompatible change, which could not be done in a minor release like 3.2. It had to wait until 4.0.

Everything is already in place in the classes, with TODO comments and commented out code.

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