Boost C++ Libraries

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Function template callable

boost::yap::callable

// In header: <boost/yap/algorithm.hpp>


template<typename Expr> constexpr decltype(auto) callable(Expr && expr);

Returns the callable in a call expression.

Equivalent to get(expr, 0).

	Note
	`callable()` is only valid if Expr is an `expr_kind::call` expression.