Class expression_function¶

`class` expression_function<Fn, Args> base ¶

template <typename Fn, typename... Args>
struct expression_function : expression_with_arguments<Args...>, expression_traits_defaults { … }

Expression that applies a callable to its arguments.

Template parameters
Fn	Callable type.
Args	Argument types.

`typedef` value_type ¶

using value_type =
    typename std::invoke_result_t<Fn,
                                  vec<typename expression_traits<Args>::value_type, 1>...>::value_type

Value type produced by the expression.

Fully qualified name: kfr::expression_function<Fn, Args>::value_type

Declared at base/expression.hpp:749

`variable` dims ¶

constexpr static size_t dims = std::max({ expression_traits<Args>::dims... })

Number of dimensions of the expression.

Fully qualified name: kfr::expression_function<Fn, Args>::dims

Declared at base/expression.hpp:753

`function` get_shape(const expression_function<Fn, Args...> &) ¶

constexpr static shape<dims> get_shape(const expression_function& self) { … }

Returns the shape of the expression instance.

Computes the common shape of all arguments at runtime.

Parameters
self	Expression instance.

Returns
	Common shape of the arguments.

Fully qualified name: kfr::expression_function<Fn, Args>::get_shape(const expression_function<Fn, Args...> &)

Declared at base/expression.hpp:800

`function` get_shape() ¶

constexpr static shape<dims> get_shape() { … }

Returns the static shape of the expression type.

Computes the common shape of all arguments at compile time.

Returns
	Common shape of the arguments.

Fully qualified name: kfr::expression_function<Fn, Args>::get_shape()

Declared at base/expression.hpp:815

`variable` random_access ¶

constexpr static inline bool random_access = (expression_traits<Args>::random_access && ...)

when all arguments support random access.

true

Fully qualified name: kfr::expression_function<Fn, Args>::random_access

Declared at base/expression.hpp:828

`variable` fn ¶

Fn fn

Callable applied to the arguments.

Fully qualified name: kfr::expression_function<Fn, Args>::fn

Declared at base/expression.hpp:831

`constructor` expression_function<Fn, Args...>(expression_with_arguments<Args...>, Fn &&) ¶

Constructs the expression from an argument holder and a callable.

Parameters
args	Argument holder.
fn	Callable to apply.

Fully qualified name: kfr::expression_function<Fn, Args>::expression_function<Fn, Args...>(expression_with_arguments<Args...>, Fn &&)

Declared at base/expression.hpp:838

`constructor` expression_function<Fn, Args...>(Fn &&, arg<Args &&>...) ¶

Constructs the expression from a callable and a pack of arguments.

Parameters
fn	Callable to apply.
args	Arguments to store.

Fully qualified name: kfr::expression_function<Fn, Args>::expression_function<Fn, Args...>(Fn &&, arg<Args &&>...)

Declared at base/expression.hpp:847

`constructor` expression_function<Fn, Args...>(arg<Args &&>...) ¶

Constructs the expression from a pack of arguments with a default-constructed callable.

Parameters
args	Arguments to store.

Fully qualified name: kfr::expression_function<Fn, Args>::expression_function<Fn, Args...>(arg<Args &&>...)

Declared at base/expression.hpp:856

`function` operator=(In &&) ¶

template <input_expression In>
expression_function& operator=(In&& in)

Processes an input expression into this output expression.

Parameters
in	Input expression to read from.

Returns
	Reference to `*this` .

Fully qualified name: kfr::expression_function<Fn, Args>::operator=(In &&)

Declared at base/expression.hpp:867

Fully qualified name: kfr::expression_function<Fn, Args>

Declared at base/expression.hpp:746

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Class expression_function¶