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51 lines
1.2 KiB
ReStructuredText
51 lines
1.2 KiB
ReStructuredText
as_args
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=======
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turn an iterable argument into multiple arguments
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-------------------------------------------------
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.. code-block:: cpp
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template <typename T>
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as_args_t { ... };
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template <typename T>
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as_args_t<T> as_args( T&& );
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``sol::as_args`` is a function that that takes an iterable and turns it into multiple arguments to a function call. It forwards its arguments, and is meant to be used as shown below:
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.. code-block:: cpp
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:caption: as_args.c++
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#define SOL_CHECK_ARGUMENTS
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#include <sol.hpp>
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#include <vector>
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#include <set>
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int main(int argc, const char* argv[]) {
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sol::state lua;
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lua.open_libraries();
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lua.script("function f (a, b, c, d) print(a, b, c, d) end");
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sol::function f = lua["f"];
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std::vector<int> v2{ 3, 4 };
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f(1, 2, sol::as_args(v2));
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std::set<int> v4{ 3, 1, 2, 4 };
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f(sol::as_args(v4));
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int v3[] = { 2, 3, 4 };
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f(1, sol::as_args(v3));
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return 0;
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}
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It is basically implemented as a `one-way customization point`_. For more information about customization points, see the :doc:`tutorial on how to customize Sol to work with your types<../tutorial/customization>`.
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.. _one-way customization point: https://github.com/ThePhD/sol2/blob/develop/sol/as_args.hpp
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