#12112 closed Bugs (fixed)

cpp_dec_float: assigning double(-infinity) drops the negative

Reported by: Jason Rhinelander <jason@…> Owned by: johnmaddock
Milestone: To Be Determined Component: multiprecision
Version: Boost 1.60.0 Severity: Problem
Keywords: Cc:


Initializing (or assigning) negative infinity to a cpp_dec_float assigns positive infinity instead of negative infinity.

The problem seems to be that cpp_dec_float.hpp, in operator=(long double a), does:

      return *this = inf();

but I think that should instead be (I have not tested this):

    if((boost::math::isinf)(a)) {
       *this = inf();
       if (a < 0) negate();
       return *this;

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Change History (1)

comment:1 Changed 15 months ago by johnmaddock

  • Resolution set to fixed
  • Status changed from new to closed

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