File Coverage

/usr/local/lib/perl5/site_perl/5.26.1/x86_64-linux/CPP/panda/lib.x/i/panda/optional.h

Criterion	Covered	Total	%
statement	3	5	60.0
branch	0	2	0.0
condition			n/a
subroutine			n/a
pod			n/a
total	3	7	42.8

#pragma once

#if __cpp_lib_optional >= 201603L
#  include
namespace panda {
  template
  using optional = std::optional;
}
#else

namespace panda {
  template
  struct optional {
    optional() : exists(false) {}
    optional(const T& val) :val(val), exists(true) {}

    T value() const {
      return val;
    }

    T value_or(const T& def) const {
      return exists ? val : def;
    }

    explicit operator bool() const {
      return exists;
    }

    T val;
    bool exists;
  };

  template
  struct optional_tools {
      using type = optional;
      static type default_value() {return type{};}
  };

  template <>
  struct optional_tools {
      static void default_value(){}
      using type = void;
  };
}

#endif