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40 lines
1.2 KiB
ReStructuredText
40 lines
1.2 KiB
ReStructuredText
resolve
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=======
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utility to pick overloaded C++ function calls
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---------------------------------------------
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.. code-block:: cpp
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:caption: function: resolve C++ overload
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template <typename... Args, typename F>
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auto resolve( F f );
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``resolve`` is a function that is meant to help users pick a single function out of a group of overloaded functions in C++. You can use it to pick overloads by specifying the signature as the first template argument. Given a collection of overloaded functions:
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.. code-block:: cpp
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:linenos:
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int overloaded(int x);
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int overloaded(int x, int y);
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int overloaded(int x, int y, int z);
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You can disambiguate them using ``resolve``:
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.. code-block:: cpp
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:linenos:
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auto one_argument_func = resolve<int(int)>( overloaded );
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auto two_argument_func = resolve<int(int, int)>( overloaded );
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auto three_argument_func = resolve<int(int, int, int)>( overloaded );
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This resolution becomes useful when setting functions on a :doc:`table<table>` or :doc:`state_view<state>`:
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.. code-block:: cpp
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:linenos:
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sol::state lua;
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lua.set_function("a", resolve<int(int)>( overloaded ) );
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lua.set_function("b", resolve<int(int, int)>( overloaded ));
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lua.set_function("c", resolve<int(int, int, int)>( overloaded ));
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