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__gnu_parallel::_LoserTreeTraits< _Tp >(3cxx) __gnu_parallel::_LoserTreeTraits< _Tp >(3cxx)

NAME

__gnu_parallel::_LoserTreeTraits< _Tp > - Traits for determining whether the loser tree should use pointers or copies.

SYNOPSIS

Static Public Attributes


static const bool _M_use_pointer
True iff to use pointers instead of values in loser trees.

Detailed Description

template<typename _Tp>

struct __gnu_parallel::_LoserTreeTraits< _Tp >" Traits for determining whether the loser tree should use pointers or copies.

The field '_M_use_pointer' is used to determine whether to use pointers in he loser trees or whether to copy the values into the loser tree.

The default behavior is to use pointers if the data type is 4 times as big as the pointer to it.

Specialize for your data type to customize the behavior.

Example:

template<> struct _LoserTreeTraits<int> { static const bool _M_use_pointer = false; };

template<> struct _LoserTreeTraits<heavyweight_type> { static const bool _M_use_pointer = true; };

Parameters

_Tp type to give the loser tree traits for.

Definition at line 731 of file multiway_merge.h.

Member Data Documentation

template<typename _Tp > const bool __gnu_parallel::_LoserTreeTraits< _Tp >::_M_use_pointer [static]

True iff to use pointers instead of values in loser trees. The default behavior is to use pointers if the data type is four times as big as the pointer to it.

Definition at line 739 of file multiway_merge.h.

Author

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Mon Jul 13 2020 libstdc++