cli::conversion::Choice< T, Mapper > Struct Template Reference

Converts a string token to type T via a user-supplied mapper function. More...

#include <action.hh>

Public Types
template<class Input>
using	after_type = T
template<class Prev>
using	storage_type = void

Public Member Functions
auto	operator() (ActionCtx< void > ctx, ActionResult< std::string_view > input) const -> ActionResult< T >

Static Public Attributes
template<class Input>
static constexpr bool	accepts_input = Bool::template accepts_input<Input>

Detailed Description

template<class T, auto Mapper>
struct cli::conversion::Choice< T, Mapper >

Converts a string token to type T via a user-supplied mapper function.

Mapper must be a constexpr callable of the form (std::string_view) -> std::optional<T>. Returns ErrorCode::invalid_choice when the mapper returns std::nullopt.

Template Parameters

T	The target value type.
Mapper	A constexpr callable mapping strings to std::optional<T>.

Definition at line 895 of file action.hh.

Member Typedef Documentation

after_type

template<class T, auto Mapper>

template<class Input>

using cli::conversion::Choice< T, Mapper >::after_type = T

Definition at line 900 of file action.hh.

storage_type

template<class T, auto Mapper>

template<class Prev>

using cli::conversion::Choice< T, Mapper >::storage_type = void

Definition at line 903 of file action.hh.

Member Function Documentation

operator()()

template<class T, auto Mapper>

auto cli::conversion::Choice< T, Mapper >::operator() ( ActionCtx< void > ctx, ActionResult< std::string_view > input ) const -> ActionResult< T >

inline

Definition at line 905 of file action.hh.

Member Data Documentation

accepts_input

template<class T, auto Mapper>

template<class Input>

bool cli::conversion::Choice< T, Mapper >::accepts_input = Bool::template accepts_input<Input>

staticconstexpr

Definition at line 897 of file action.hh.

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The documentation for this struct was generated from the following file:

• include/cli/action.hh