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[#structboost_1_1geometry_1_1index_1_1equal__to]
[section boost::geometry::index::equal_to]

'''<indexterm><primary>boost</primary></indexterm><indexterm><primary>geometry</primary></indexterm><indexterm><primary>index</primary></indexterm><indexterm><primary>equal_to</primary></indexterm>'''
The function object comparing Values. 

[heading Description]
The default version handles Values which are Indexables, std::pair<T1, T2>, boost::tuple<...> and std::tuple<...> if STD tuples and variadic templates are supported. All members are compared from left to right, Geometries using boost::geometry::equals() function, other types using operator==.

[heading Header]
`#include <boost/geometry/index/equal_to.hpp>`

[heading Synopsis]
[pre
`template<``typename Value``>`
`struct equal_to`
`{`
`  // ...`
`};`
]

[heading Template parameter(s)]
[table
[[Parameter] [Description]]
[[`Value`][The type of objects which are compared by this function object. ]]
]

[heading Typedef(s)]
[table
[[Type] [Description]]
[[[#structboost_1_1geometry_1_1index_1_1equal__to_1ae6a986988e380c2ba4afa646294cfd93] `result_type`][The type of result returned by function object. ]]
]

[heading Member(s)]
[table
[[Modifier][Function][Description]]
[[ `const`][[link structboost_1_1geometry_1_1index_1_1equal__to_1adb497915885d69df9aff938d16922ff3 `operator()(Value const &, Value const &)`]][Compare Values. ]]
]

[#structboost_1_1geometry_1_1index_1_1equal__to_1adb497915885d69df9aff938d16922ff3]
[section operator()(Value const &, Value const &)]
'''<indexterm><primary>operator()</primary></indexterm>'''
Compare Values. 

[heading Synopsis]
[pre

`bool` `operator()``(``Value const &` `l``,` `Value const &` `r``)`
]

[heading Modifier(s)]
``const ``[heading Parameter(s)]
[table 
[[Type][Name][Description]]
[[`Value const &`][ `l` ][First value. ]]
[[`Value const &`][ `r` ][Second value. ]]
]
[heading Returns]
true if Values are equal. 
[endsect]

[endsect]

