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      std::numeric_limits<T>::is_exact

      From cppreference.com
      <cpp‎ |types‎ |numeric limits
       
       
      Utilities library
       
       
      std::numeric_limits
      Static constants
      numeric_limits::is_exact
      Static member functions
      Helper types
       
      staticconstbool is_exact;
      (until C++11)
      staticconstexprbool is_exact;
      (since C++11)

      The value ofstd::numeric_limits<T>::is_exact istrue for all arithmetic typesT that use exact representation.

      [edit]Standard specializations

      T value ofstd::numeric_limits<T>::is_exact
      /* non-specialized */false
      booltrue
      chartrue
      signedchartrue
      unsignedchartrue
      wchar_ttrue
      char8_t(since C++20)true
      char16_t(since C++11)true
      char32_t(since C++11)true
      shorttrue
      unsignedshorttrue
      inttrue
      unsignedinttrue
      longtrue
      unsignedlongtrue
      longlong(since C++11)true
      unsignedlonglong(since C++11)true
      floatfalse
      doublefalse
      longdoublefalse

      [edit]Notes

      While all fundamental typesT for whichstd::numeric_limits<T>::is_exact==true are integer types, a library may define exact types that are not integers, e.g. a rational arithmetic type representing fractions.

      [edit]See also

      [static]
      identifies integer types
      (public static member constant)[edit]
      [static]
      identifies signed types
      (public static member constant)[edit]
      [static]
      identifies types that represent a finite set of values
      (public static member constant)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/types/numeric_limits/is_exact&oldid=149086"

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