.TH "std::__detail::_Hashtable_traits< _Cache_hash_code, _Constant_iterators, _Unique_keys >" 3cxx "libstdc++" \" -*- nroff -*-
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.SH NAME
std::__detail::_Hashtable_traits< _Cache_hash_code, _Constant_iterators, _Unique_keys >
.SH SYNOPSIS
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.PP
.PP
\fC#include <hashtable_policy\&.h>\fP
.SS "Public Types"

.in +1c
.ti -1c
.RI "\fBusing\fP \fB__constant_iterators\fP = \fB__bool_constant\fP< \fB_Constant_iterators\fP >"
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.ti -1c
.RI "\fBusing\fP \fB__hash_cached\fP = \fB__bool_constant\fP< \fB_Cache_hash_code\fP >"
.br
.ti -1c
.RI "\fBusing\fP \fB__unique_keys\fP = \fB__bool_constant\fP< \fB_Unique_keys\fP >"
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.in -1c
.SH "Detailed Description"
.PP 

.SS "template<bool _Cache_hash_code, bool _Constant_iterators, bool _Unique_keys>
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struct std::__detail::_Hashtable_traits< _Cache_hash_code, _Constant_iterators, _Unique_keys >"struct _Hashtable_traits
.PP
Important traits for hash tables\&.
.PP
\fBTemplate Parameters\fP
.RS 4
\fI_Cache_hash_code\fP Boolean value\&. True if the value of the hash function is stored along with the value\&. This is a time-space tradeoff\&. Storing it may improve lookup speed by reducing the number of times we need to call the _Equal function\&.
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\fI_Constant_iterators\fP Boolean value\&. True if iterator and const_iterator are both constant iterator types\&. This is true for unordered_set and unordered_multiset, false for unordered_map and unordered_multimap\&.
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\fI_Unique_keys\fP Boolean value\&. True if the return value of _Hashtable::count(k) is always at most one, false if it may be an arbitrary number\&. This is true for unordered_set and unordered_map, false for unordered_multiset and unordered_multimap\&. 
.RE
.PP

.PP
Definition at line \fB199\fP of file \fBhashtable_policy\&.h\fP\&.
.SH "Member Typedef Documentation"
.PP 
.SS "template<bool _Cache_hash_code, bool _Constant_iterators, bool _Unique_keys> \fBusing\fP \fBstd::__detail::_Hashtable_traits\fP< \fB_Cache_hash_code\fP, \fB_Constant_iterators\fP, \fB_Unique_keys\fP >::__constant_iterators =  \fB__bool_constant\fP<\fB_Constant_iterators\fP>"

.PP
Definition at line \fB202\fP of file \fBhashtable_policy\&.h\fP\&.
.SS "template<bool _Cache_hash_code, bool _Constant_iterators, bool _Unique_keys> \fBusing\fP \fBstd::__detail::_Hashtable_traits\fP< \fB_Cache_hash_code\fP, \fB_Constant_iterators\fP, \fB_Unique_keys\fP >::__hash_cached =  \fB__bool_constant\fP<\fB_Cache_hash_code\fP>"

.PP
Definition at line \fB201\fP of file \fBhashtable_policy\&.h\fP\&.
.SS "template<bool _Cache_hash_code, bool _Constant_iterators, bool _Unique_keys> \fBusing\fP \fBstd::__detail::_Hashtable_traits\fP< \fB_Cache_hash_code\fP, \fB_Constant_iterators\fP, \fB_Unique_keys\fP >::__unique_keys =  \fB__bool_constant\fP<\fB_Unique_keys\fP>"

.PP
Definition at line \fB203\fP of file \fBhashtable_policy\&.h\fP\&.

.SH "Author"
.PP 
Generated automatically by Doxygen for libstdc++ from the source code\&.