1561 lines
63 KiB
C++
1561 lines
63 KiB
C++
// Copyright (c) 2017-2022, University of Cincinnati, developed by Henry Schreiner
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// under NSF AWARD 1414736 and by the respective contributors.
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// All rights reserved.
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//
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// SPDX-License-Identifier: BSD-3-Clause
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#pragma once
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// [CLI11:public_includes:set]
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#include <cstdint>
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#include <exception>
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#include <limits>
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#include <memory>
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#include <string>
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#include <type_traits>
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#include <utility>
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#include <vector>
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// [CLI11:public_includes:end]
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#include "StringTools.hpp"
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namespace CLI {
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// [CLI11:type_tools_hpp:verbatim]
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// Type tools
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// Utilities for type enabling
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namespace detail {
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// Based generally on https://rmf.io/cxx11/almost-static-if
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/// Simple empty scoped class
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enum class enabler {};
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/// An instance to use in EnableIf
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constexpr enabler dummy = {};
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} // namespace detail
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/// A copy of enable_if_t from C++14, compatible with C++11.
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///
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/// We could check to see if C++14 is being used, but it does not hurt to redefine this
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/// (even Google does this: https://github.com/google/skia/blob/main/include/private/SkTLogic.h)
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/// It is not in the std namespace anyway, so no harm done.
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template <bool B, class T = void> using enable_if_t = typename std::enable_if<B, T>::type;
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/// A copy of std::void_t from C++17 (helper for C++11 and C++14)
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template <typename... Ts> struct make_void { using type = void; };
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/// A copy of std::void_t from C++17 - same reasoning as enable_if_t, it does not hurt to redefine
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template <typename... Ts> using void_t = typename make_void<Ts...>::type;
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/// A copy of std::conditional_t from C++14 - same reasoning as enable_if_t, it does not hurt to redefine
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template <bool B, class T, class F> using conditional_t = typename std::conditional<B, T, F>::type;
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/// Check to see if something is bool (fail check by default)
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template <typename T> struct is_bool : std::false_type {};
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/// Check to see if something is bool (true if actually a bool)
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template <> struct is_bool<bool> : std::true_type {};
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/// Check to see if something is a shared pointer
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template <typename T> struct is_shared_ptr : std::false_type {};
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/// Check to see if something is a shared pointer (True if really a shared pointer)
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template <typename T> struct is_shared_ptr<std::shared_ptr<T>> : std::true_type {};
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/// Check to see if something is a shared pointer (True if really a shared pointer)
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template <typename T> struct is_shared_ptr<const std::shared_ptr<T>> : std::true_type {};
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/// Check to see if something is copyable pointer
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template <typename T> struct is_copyable_ptr {
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static bool const value = is_shared_ptr<T>::value || std::is_pointer<T>::value;
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};
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/// This can be specialized to override the type deduction for IsMember.
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template <typename T> struct IsMemberType { using type = T; };
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/// The main custom type needed here is const char * should be a string.
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template <> struct IsMemberType<const char *> { using type = std::string; };
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namespace detail {
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// These are utilities for IsMember and other transforming objects
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/// Handy helper to access the element_type generically. This is not part of is_copyable_ptr because it requires that
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/// pointer_traits<T> be valid.
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/// not a pointer
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template <typename T, typename Enable = void> struct element_type { using type = T; };
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template <typename T> struct element_type<T, typename std::enable_if<is_copyable_ptr<T>::value>::type> {
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using type = typename std::pointer_traits<T>::element_type;
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};
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/// Combination of the element type and value type - remove pointer (including smart pointers) and get the value_type of
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/// the container
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template <typename T> struct element_value_type { using type = typename element_type<T>::type::value_type; };
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/// Adaptor for set-like structure: This just wraps a normal container in a few utilities that do almost nothing.
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template <typename T, typename _ = void> struct pair_adaptor : std::false_type {
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using value_type = typename T::value_type;
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using first_type = typename std::remove_const<value_type>::type;
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using second_type = typename std::remove_const<value_type>::type;
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/// Get the first value (really just the underlying value)
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template <typename Q> static auto first(Q &&pair_value) -> decltype(std::forward<Q>(pair_value)) {
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return std::forward<Q>(pair_value);
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}
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/// Get the second value (really just the underlying value)
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template <typename Q> static auto second(Q &&pair_value) -> decltype(std::forward<Q>(pair_value)) {
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return std::forward<Q>(pair_value);
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}
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};
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/// Adaptor for map-like structure (true version, must have key_type and mapped_type).
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/// This wraps a mapped container in a few utilities access it in a general way.
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template <typename T>
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struct pair_adaptor<
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T,
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conditional_t<false, void_t<typename T::value_type::first_type, typename T::value_type::second_type>, void>>
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: std::true_type {
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using value_type = typename T::value_type;
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using first_type = typename std::remove_const<typename value_type::first_type>::type;
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using second_type = typename std::remove_const<typename value_type::second_type>::type;
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/// Get the first value (really just the underlying value)
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template <typename Q> static auto first(Q &&pair_value) -> decltype(std::get<0>(std::forward<Q>(pair_value))) {
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return std::get<0>(std::forward<Q>(pair_value));
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}
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/// Get the second value (really just the underlying value)
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template <typename Q> static auto second(Q &&pair_value) -> decltype(std::get<1>(std::forward<Q>(pair_value))) {
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return std::get<1>(std::forward<Q>(pair_value));
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}
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};
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// Warning is suppressed due to "bug" in gcc<5.0 and gcc 7.0 with c++17 enabled that generates a Wnarrowing warning
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// in the unevaluated context even if the function that was using this wasn't used. The standard says narrowing in
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// brace initialization shouldn't be allowed but for backwards compatibility gcc allows it in some contexts. It is a
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// little fuzzy what happens in template constructs and I think that was something GCC took a little while to work out.
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// But regardless some versions of gcc generate a warning when they shouldn't from the following code so that should be
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// suppressed
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#ifdef __GNUC__
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wnarrowing"
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#endif
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// check for constructibility from a specific type and copy assignable used in the parse detection
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template <typename T, typename C> class is_direct_constructible {
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template <typename TT, typename CC>
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static auto test(int, std::true_type) -> decltype(
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// NVCC warns about narrowing conversions here
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#ifdef __CUDACC__
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#pragma diag_suppress 2361
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#endif
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TT{std::declval<CC>()}
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#ifdef __CUDACC__
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#pragma diag_default 2361
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#endif
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,
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std::is_move_assignable<TT>());
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template <typename TT, typename CC> static auto test(int, std::false_type) -> std::false_type;
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template <typename, typename> static auto test(...) -> std::false_type;
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public:
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static constexpr bool value = decltype(test<T, C>(0, typename std::is_constructible<T, C>::type()))::value;
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};
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#ifdef __GNUC__
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#pragma GCC diagnostic pop
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#endif
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// Check for output streamability
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// Based on https://stackoverflow.com/questions/22758291/how-can-i-detect-if-a-type-can-be-streamed-to-an-stdostream
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template <typename T, typename S = std::ostringstream> class is_ostreamable {
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template <typename TT, typename SS>
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static auto test(int) -> decltype(std::declval<SS &>() << std::declval<TT>(), std::true_type());
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template <typename, typename> static auto test(...) -> std::false_type;
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public:
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static constexpr bool value = decltype(test<T, S>(0))::value;
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};
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/// Check for input streamability
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template <typename T, typename S = std::istringstream> class is_istreamable {
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template <typename TT, typename SS>
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static auto test(int) -> decltype(std::declval<SS &>() >> std::declval<TT &>(), std::true_type());
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template <typename, typename> static auto test(...) -> std::false_type;
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public:
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static constexpr bool value = decltype(test<T, S>(0))::value;
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};
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/// Check for complex
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template <typename T> class is_complex {
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template <typename TT>
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static auto test(int) -> decltype(std::declval<TT>().real(), std::declval<TT>().imag(), std::true_type());
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template <typename> static auto test(...) -> std::false_type;
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public:
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static constexpr bool value = decltype(test<T>(0))::value;
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};
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/// Templated operation to get a value from a stream
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template <typename T, enable_if_t<is_istreamable<T>::value, detail::enabler> = detail::dummy>
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bool from_stream(const std::string &istring, T &obj) {
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std::istringstream is;
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is.str(istring);
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is >> obj;
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return !is.fail() && !is.rdbuf()->in_avail();
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}
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template <typename T, enable_if_t<!is_istreamable<T>::value, detail::enabler> = detail::dummy>
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bool from_stream(const std::string & /*istring*/, T & /*obj*/) {
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return false;
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}
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// check to see if an object is a mutable container (fail by default)
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template <typename T, typename _ = void> struct is_mutable_container : std::false_type {};
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/// type trait to test if a type is a mutable container meaning it has a value_type, it has an iterator, a clear, and
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/// end methods and an insert function. And for our purposes we exclude std::string and types that can be constructed
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/// from a std::string
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template <typename T>
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struct is_mutable_container<
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T,
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conditional_t<false,
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void_t<typename T::value_type,
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decltype(std::declval<T>().end()),
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decltype(std::declval<T>().clear()),
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decltype(std::declval<T>().insert(std::declval<decltype(std::declval<T>().end())>(),
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std::declval<const typename T::value_type &>()))>,
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void>>
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: public conditional_t<std::is_constructible<T, std::string>::value, std::false_type, std::true_type> {};
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// check to see if an object is a mutable container (fail by default)
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template <typename T, typename _ = void> struct is_readable_container : std::false_type {};
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/// type trait to test if a type is a container meaning it has a value_type, it has an iterator, a clear, and an end
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/// methods and an insert function. And for our purposes we exclude std::string and types that can be constructed from
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/// a std::string
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template <typename T>
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struct is_readable_container<
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T,
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conditional_t<false, void_t<decltype(std::declval<T>().end()), decltype(std::declval<T>().begin())>, void>>
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: public std::true_type {};
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// check to see if an object is a wrapper (fail by default)
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template <typename T, typename _ = void> struct is_wrapper : std::false_type {};
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// check if an object is a wrapper (it has a value_type defined)
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template <typename T>
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struct is_wrapper<T, conditional_t<false, void_t<typename T::value_type>, void>> : public std::true_type {};
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// Check for tuple like types, as in classes with a tuple_size type trait
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template <typename S> class is_tuple_like {
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template <typename SS>
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// static auto test(int)
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// -> decltype(std::conditional<(std::tuple_size<SS>::value > 0), std::true_type, std::false_type>::type());
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static auto test(int) -> decltype(std::tuple_size<typename std::decay<SS>::type>::value, std::true_type{});
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template <typename> static auto test(...) -> std::false_type;
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public:
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static constexpr bool value = decltype(test<S>(0))::value;
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};
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/// Convert an object to a string (directly forward if this can become a string)
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template <typename T, enable_if_t<std::is_convertible<T, std::string>::value, detail::enabler> = detail::dummy>
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auto to_string(T &&value) -> decltype(std::forward<T>(value)) {
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return std::forward<T>(value);
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}
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/// Construct a string from the object
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template <typename T,
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enable_if_t<std::is_constructible<std::string, T>::value && !std::is_convertible<T, std::string>::value,
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detail::enabler> = detail::dummy>
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std::string to_string(const T &value) {
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return std::string(value); // NOLINT(google-readability-casting)
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}
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/// Convert an object to a string (streaming must be supported for that type)
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template <typename T,
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enable_if_t<!std::is_convertible<std::string, T>::value && !std::is_constructible<std::string, T>::value &&
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is_ostreamable<T>::value,
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detail::enabler> = detail::dummy>
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std::string to_string(T &&value) {
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std::stringstream stream;
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stream << value;
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return stream.str();
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}
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/// If conversion is not supported, return an empty string (streaming is not supported for that type)
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template <typename T,
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enable_if_t<!std::is_constructible<std::string, T>::value && !is_ostreamable<T>::value &&
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!is_readable_container<typename std::remove_const<T>::type>::value,
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detail::enabler> = detail::dummy>
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std::string to_string(T &&) {
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return {};
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}
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/// convert a readable container to a string
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template <typename T,
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enable_if_t<!std::is_constructible<std::string, T>::value && !is_ostreamable<T>::value &&
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is_readable_container<T>::value,
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detail::enabler> = detail::dummy>
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std::string to_string(T &&variable) {
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auto cval = variable.begin();
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auto end = variable.end();
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if(cval == end) {
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return {"{}"};
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}
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std::vector<std::string> defaults;
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while(cval != end) {
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defaults.emplace_back(CLI::detail::to_string(*cval));
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++cval;
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}
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return {"[" + detail::join(defaults) + "]"};
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}
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/// special template overload
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template <typename T1,
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typename T2,
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typename T,
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enable_if_t<std::is_same<T1, T2>::value, detail::enabler> = detail::dummy>
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auto checked_to_string(T &&value) -> decltype(to_string(std::forward<T>(value))) {
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return to_string(std::forward<T>(value));
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}
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/// special template overload
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template <typename T1,
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typename T2,
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typename T,
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enable_if_t<!std::is_same<T1, T2>::value, detail::enabler> = detail::dummy>
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std::string checked_to_string(T &&) {
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return std::string{};
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}
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/// get a string as a convertible value for arithmetic types
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template <typename T, enable_if_t<std::is_arithmetic<T>::value, detail::enabler> = detail::dummy>
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std::string value_string(const T &value) {
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return std::to_string(value);
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}
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/// get a string as a convertible value for enumerations
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template <typename T, enable_if_t<std::is_enum<T>::value, detail::enabler> = detail::dummy>
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std::string value_string(const T &value) {
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return std::to_string(static_cast<typename std::underlying_type<T>::type>(value));
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}
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/// for other types just use the regular to_string function
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template <typename T,
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enable_if_t<!std::is_enum<T>::value && !std::is_arithmetic<T>::value, detail::enabler> = detail::dummy>
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auto value_string(const T &value) -> decltype(to_string(value)) {
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return to_string(value);
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}
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/// template to get the underlying value type if it exists or use a default
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template <typename T, typename def, typename Enable = void> struct wrapped_type { using type = def; };
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/// Type size for regular object types that do not look like a tuple
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template <typename T, typename def> struct wrapped_type<T, def, typename std::enable_if<is_wrapper<T>::value>::type> {
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using type = typename T::value_type;
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};
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/// This will only trigger for actual void type
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template <typename T, typename Enable = void> struct type_count_base { static const int value{0}; };
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/// Type size for regular object types that do not look like a tuple
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template <typename T>
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struct type_count_base<T,
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typename std::enable_if<!is_tuple_like<T>::value && !is_mutable_container<T>::value &&
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!std::is_void<T>::value>::type> {
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static constexpr int value{1};
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};
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/// the base tuple size
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template <typename T>
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struct type_count_base<T, typename std::enable_if<is_tuple_like<T>::value && !is_mutable_container<T>::value>::type> {
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static constexpr int value{std::tuple_size<T>::value};
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};
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/// Type count base for containers is the type_count_base of the individual element
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template <typename T> struct type_count_base<T, typename std::enable_if<is_mutable_container<T>::value>::type> {
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static constexpr int value{type_count_base<typename T::value_type>::value};
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};
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/// Set of overloads to get the type size of an object
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/// forward declare the subtype_count structure
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template <typename T> struct subtype_count;
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/// forward declare the subtype_count_min structure
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template <typename T> struct subtype_count_min;
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/// This will only trigger for actual void type
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template <typename T, typename Enable = void> struct type_count { static const int value{0}; };
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/// Type size for regular object types that do not look like a tuple
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template <typename T>
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struct type_count<T,
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typename std::enable_if<!is_wrapper<T>::value && !is_tuple_like<T>::value && !is_complex<T>::value &&
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!std::is_void<T>::value>::type> {
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static constexpr int value{1};
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};
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/// Type size for complex since it sometimes looks like a wrapper
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template <typename T> struct type_count<T, typename std::enable_if<is_complex<T>::value>::type> {
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static constexpr int value{2};
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};
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/// Type size of types that are wrappers,except complex and tuples(which can also be wrappers sometimes)
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template <typename T> struct type_count<T, typename std::enable_if<is_mutable_container<T>::value>::type> {
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static constexpr int value{subtype_count<typename T::value_type>::value};
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};
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/// Type size of types that are wrappers,except containers complex and tuples(which can also be wrappers sometimes)
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template <typename T>
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struct type_count<T,
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typename std::enable_if<is_wrapper<T>::value && !is_complex<T>::value && !is_tuple_like<T>::value &&
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!is_mutable_container<T>::value>::type> {
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static constexpr int value{type_count<typename T::value_type>::value};
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};
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/// 0 if the index > tuple size
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template <typename T, std::size_t I>
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constexpr typename std::enable_if<I == type_count_base<T>::value, int>::type tuple_type_size() {
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return 0;
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}
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/// Recursively generate the tuple type name
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template <typename T, std::size_t I>
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constexpr typename std::enable_if < I<type_count_base<T>::value, int>::type tuple_type_size() {
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return subtype_count<typename std::tuple_element<I, T>::type>::value + tuple_type_size<T, I + 1>();
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}
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/// Get the type size of the sum of type sizes for all the individual tuple types
|
|
template <typename T> struct type_count<T, typename std::enable_if<is_tuple_like<T>::value>::type> {
|
|
static constexpr int value{tuple_type_size<T, 0>()};
|
|
};
|
|
|
|
/// definition of subtype count
|
|
template <typename T> struct subtype_count {
|
|
static constexpr int value{is_mutable_container<T>::value ? expected_max_vector_size : type_count<T>::value};
|
|
};
|
|
|
|
/// This will only trigger for actual void type
|
|
template <typename T, typename Enable = void> struct type_count_min { static const int value{0}; };
|
|
|
|
/// Type size for regular object types that do not look like a tuple
|
|
template <typename T>
|
|
struct type_count_min<
|
|
T,
|
|
typename std::enable_if<!is_mutable_container<T>::value && !is_tuple_like<T>::value && !is_wrapper<T>::value &&
|
|
!is_complex<T>::value && !std::is_void<T>::value>::type> {
|
|
static constexpr int value{type_count<T>::value};
|
|
};
|
|
|
|
/// Type size for complex since it sometimes looks like a wrapper
|
|
template <typename T> struct type_count_min<T, typename std::enable_if<is_complex<T>::value>::type> {
|
|
static constexpr int value{1};
|
|
};
|
|
|
|
/// Type size min of types that are wrappers,except complex and tuples(which can also be wrappers sometimes)
|
|
template <typename T>
|
|
struct type_count_min<
|
|
T,
|
|
typename std::enable_if<is_wrapper<T>::value && !is_complex<T>::value && !is_tuple_like<T>::value>::type> {
|
|
static constexpr int value{subtype_count_min<typename T::value_type>::value};
|
|
};
|
|
|
|
/// 0 if the index > tuple size
|
|
template <typename T, std::size_t I>
|
|
constexpr typename std::enable_if<I == type_count_base<T>::value, int>::type tuple_type_size_min() {
|
|
return 0;
|
|
}
|
|
|
|
/// Recursively generate the tuple type name
|
|
template <typename T, std::size_t I>
|
|
constexpr typename std::enable_if < I<type_count_base<T>::value, int>::type tuple_type_size_min() {
|
|
return subtype_count_min<typename std::tuple_element<I, T>::type>::value + tuple_type_size_min<T, I + 1>();
|
|
}
|
|
|
|
/// Get the type size of the sum of type sizes for all the individual tuple types
|
|
template <typename T> struct type_count_min<T, typename std::enable_if<is_tuple_like<T>::value>::type> {
|
|
static constexpr int value{tuple_type_size_min<T, 0>()};
|
|
};
|
|
|
|
/// definition of subtype count
|
|
template <typename T> struct subtype_count_min {
|
|
static constexpr int value{is_mutable_container<T>::value
|
|
? ((type_count<T>::value < expected_max_vector_size) ? type_count<T>::value : 0)
|
|
: type_count_min<T>::value};
|
|
};
|
|
|
|
/// This will only trigger for actual void type
|
|
template <typename T, typename Enable = void> struct expected_count { static const int value{0}; };
|
|
|
|
/// For most types the number of expected items is 1
|
|
template <typename T>
|
|
struct expected_count<T,
|
|
typename std::enable_if<!is_mutable_container<T>::value && !is_wrapper<T>::value &&
|
|
!std::is_void<T>::value>::type> {
|
|
static constexpr int value{1};
|
|
};
|
|
/// number of expected items in a vector
|
|
template <typename T> struct expected_count<T, typename std::enable_if<is_mutable_container<T>::value>::type> {
|
|
static constexpr int value{expected_max_vector_size};
|
|
};
|
|
|
|
/// number of expected items in a vector
|
|
template <typename T>
|
|
struct expected_count<T, typename std::enable_if<!is_mutable_container<T>::value && is_wrapper<T>::value>::type> {
|
|
static constexpr int value{expected_count<typename T::value_type>::value};
|
|
};
|
|
|
|
// Enumeration of the different supported categorizations of objects
|
|
enum class object_category : int {
|
|
char_value = 1,
|
|
integral_value = 2,
|
|
unsigned_integral = 4,
|
|
enumeration = 6,
|
|
boolean_value = 8,
|
|
floating_point = 10,
|
|
number_constructible = 12,
|
|
double_constructible = 14,
|
|
integer_constructible = 16,
|
|
// string like types
|
|
string_assignable = 23,
|
|
string_constructible = 24,
|
|
other = 45,
|
|
// special wrapper or container types
|
|
wrapper_value = 50,
|
|
complex_number = 60,
|
|
tuple_value = 70,
|
|
container_value = 80,
|
|
|
|
};
|
|
|
|
/// Set of overloads to classify an object according to type
|
|
|
|
/// some type that is not otherwise recognized
|
|
template <typename T, typename Enable = void> struct classify_object {
|
|
static constexpr object_category value{object_category::other};
|
|
};
|
|
|
|
/// Signed integers
|
|
template <typename T>
|
|
struct classify_object<
|
|
T,
|
|
typename std::enable_if<std::is_integral<T>::value && !std::is_same<T, char>::value && std::is_signed<T>::value &&
|
|
!is_bool<T>::value && !std::is_enum<T>::value>::type> {
|
|
static constexpr object_category value{object_category::integral_value};
|
|
};
|
|
|
|
/// Unsigned integers
|
|
template <typename T>
|
|
struct classify_object<T,
|
|
typename std::enable_if<std::is_integral<T>::value && std::is_unsigned<T>::value &&
|
|
!std::is_same<T, char>::value && !is_bool<T>::value>::type> {
|
|
static constexpr object_category value{object_category::unsigned_integral};
|
|
};
|
|
|
|
/// single character values
|
|
template <typename T>
|
|
struct classify_object<T, typename std::enable_if<std::is_same<T, char>::value && !std::is_enum<T>::value>::type> {
|
|
static constexpr object_category value{object_category::char_value};
|
|
};
|
|
|
|
/// Boolean values
|
|
template <typename T> struct classify_object<T, typename std::enable_if<is_bool<T>::value>::type> {
|
|
static constexpr object_category value{object_category::boolean_value};
|
|
};
|
|
|
|
/// Floats
|
|
template <typename T> struct classify_object<T, typename std::enable_if<std::is_floating_point<T>::value>::type> {
|
|
static constexpr object_category value{object_category::floating_point};
|
|
};
|
|
|
|
/// String and similar direct assignment
|
|
template <typename T>
|
|
struct classify_object<T,
|
|
typename std::enable_if<!std::is_floating_point<T>::value && !std::is_integral<T>::value &&
|
|
std::is_assignable<T &, std::string>::value>::type> {
|
|
static constexpr object_category value{object_category::string_assignable};
|
|
};
|
|
|
|
/// String and similar constructible and copy assignment
|
|
template <typename T>
|
|
struct classify_object<
|
|
T,
|
|
typename std::enable_if<!std::is_floating_point<T>::value && !std::is_integral<T>::value &&
|
|
!std::is_assignable<T &, std::string>::value && (type_count<T>::value == 1) &&
|
|
std::is_constructible<T, std::string>::value>::type> {
|
|
static constexpr object_category value{object_category::string_constructible};
|
|
};
|
|
|
|
/// Enumerations
|
|
template <typename T> struct classify_object<T, typename std::enable_if<std::is_enum<T>::value>::type> {
|
|
static constexpr object_category value{object_category::enumeration};
|
|
};
|
|
|
|
template <typename T> struct classify_object<T, typename std::enable_if<is_complex<T>::value>::type> {
|
|
static constexpr object_category value{object_category::complex_number};
|
|
};
|
|
|
|
/// Handy helper to contain a bunch of checks that rule out many common types (integers, string like, floating point,
|
|
/// vectors, and enumerations
|
|
template <typename T> struct uncommon_type {
|
|
using type = typename std::conditional<!std::is_floating_point<T>::value && !std::is_integral<T>::value &&
|
|
!std::is_assignable<T &, std::string>::value &&
|
|
!std::is_constructible<T, std::string>::value && !is_complex<T>::value &&
|
|
!is_mutable_container<T>::value && !std::is_enum<T>::value,
|
|
std::true_type,
|
|
std::false_type>::type;
|
|
static constexpr bool value = type::value;
|
|
};
|
|
|
|
/// wrapper type
|
|
template <typename T>
|
|
struct classify_object<T,
|
|
typename std::enable_if<(!is_mutable_container<T>::value && is_wrapper<T>::value &&
|
|
!is_tuple_like<T>::value && uncommon_type<T>::value)>::type> {
|
|
static constexpr object_category value{object_category::wrapper_value};
|
|
};
|
|
|
|
/// Assignable from double or int
|
|
template <typename T>
|
|
struct classify_object<T,
|
|
typename std::enable_if<uncommon_type<T>::value && type_count<T>::value == 1 &&
|
|
!is_wrapper<T>::value && is_direct_constructible<T, double>::value &&
|
|
is_direct_constructible<T, int>::value>::type> {
|
|
static constexpr object_category value{object_category::number_constructible};
|
|
};
|
|
|
|
/// Assignable from int
|
|
template <typename T>
|
|
struct classify_object<T,
|
|
typename std::enable_if<uncommon_type<T>::value && type_count<T>::value == 1 &&
|
|
!is_wrapper<T>::value && !is_direct_constructible<T, double>::value &&
|
|
is_direct_constructible<T, int>::value>::type> {
|
|
static constexpr object_category value{object_category::integer_constructible};
|
|
};
|
|
|
|
/// Assignable from double
|
|
template <typename T>
|
|
struct classify_object<T,
|
|
typename std::enable_if<uncommon_type<T>::value && type_count<T>::value == 1 &&
|
|
!is_wrapper<T>::value && is_direct_constructible<T, double>::value &&
|
|
!is_direct_constructible<T, int>::value>::type> {
|
|
static constexpr object_category value{object_category::double_constructible};
|
|
};
|
|
|
|
/// Tuple type
|
|
template <typename T>
|
|
struct classify_object<
|
|
T,
|
|
typename std::enable_if<is_tuple_like<T>::value &&
|
|
((type_count<T>::value >= 2 && !is_wrapper<T>::value) ||
|
|
(uncommon_type<T>::value && !is_direct_constructible<T, double>::value &&
|
|
!is_direct_constructible<T, int>::value) ||
|
|
(uncommon_type<T>::value && type_count<T>::value >= 2))>::type> {
|
|
static constexpr object_category value{object_category::tuple_value};
|
|
// the condition on this class requires it be like a tuple, but on some compilers (like Xcode) tuples can be
|
|
// constructed from just the first element so tuples of <string, int,int> can be constructed from a string, which
|
|
// could lead to issues so there are two variants of the condition, the first isolates things with a type size >=2
|
|
// mainly to get tuples on Xcode with the exception of wrappers, the second is the main one and just separating out
|
|
// those cases that are caught by other object classifications
|
|
};
|
|
|
|
/// container type
|
|
template <typename T> struct classify_object<T, typename std::enable_if<is_mutable_container<T>::value>::type> {
|
|
static constexpr object_category value{object_category::container_value};
|
|
};
|
|
|
|
// Type name print
|
|
|
|
/// Was going to be based on
|
|
/// http://stackoverflow.com/questions/1055452/c-get-name-of-type-in-template
|
|
/// But this is cleaner and works better in this case
|
|
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::char_value, detail::enabler> = detail::dummy>
|
|
constexpr const char *type_name() {
|
|
return "CHAR";
|
|
}
|
|
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::integral_value ||
|
|
classify_object<T>::value == object_category::integer_constructible,
|
|
detail::enabler> = detail::dummy>
|
|
constexpr const char *type_name() {
|
|
return "INT";
|
|
}
|
|
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::unsigned_integral, detail::enabler> = detail::dummy>
|
|
constexpr const char *type_name() {
|
|
return "UINT";
|
|
}
|
|
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::floating_point ||
|
|
classify_object<T>::value == object_category::number_constructible ||
|
|
classify_object<T>::value == object_category::double_constructible,
|
|
detail::enabler> = detail::dummy>
|
|
constexpr const char *type_name() {
|
|
return "FLOAT";
|
|
}
|
|
|
|
/// Print name for enumeration types
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::enumeration, detail::enabler> = detail::dummy>
|
|
constexpr const char *type_name() {
|
|
return "ENUM";
|
|
}
|
|
|
|
/// Print name for enumeration types
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::boolean_value, detail::enabler> = detail::dummy>
|
|
constexpr const char *type_name() {
|
|
return "BOOLEAN";
|
|
}
|
|
|
|
/// Print name for enumeration types
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::complex_number, detail::enabler> = detail::dummy>
|
|
constexpr const char *type_name() {
|
|
return "COMPLEX";
|
|
}
|
|
|
|
/// Print for all other types
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value >= object_category::string_assignable &&
|
|
classify_object<T>::value <= object_category::other,
|
|
detail::enabler> = detail::dummy>
|
|
constexpr const char *type_name() {
|
|
return "TEXT";
|
|
}
|
|
/// typename for tuple value
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::tuple_value && type_count_base<T>::value >= 2,
|
|
detail::enabler> = detail::dummy>
|
|
std::string type_name(); // forward declaration
|
|
|
|
/// Generate type name for a wrapper or container value
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::container_value ||
|
|
classify_object<T>::value == object_category::wrapper_value,
|
|
detail::enabler> = detail::dummy>
|
|
std::string type_name(); // forward declaration
|
|
|
|
/// Print name for single element tuple types
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::tuple_value && type_count_base<T>::value == 1,
|
|
detail::enabler> = detail::dummy>
|
|
inline std::string type_name() {
|
|
return type_name<typename std::decay<typename std::tuple_element<0, T>::type>::type>();
|
|
}
|
|
|
|
/// Empty string if the index > tuple size
|
|
template <typename T, std::size_t I>
|
|
inline typename std::enable_if<I == type_count_base<T>::value, std::string>::type tuple_name() {
|
|
return std::string{};
|
|
}
|
|
|
|
/// Recursively generate the tuple type name
|
|
template <typename T, std::size_t I>
|
|
inline typename std::enable_if<(I < type_count_base<T>::value), std::string>::type tuple_name() {
|
|
auto str = std::string{type_name<typename std::decay<typename std::tuple_element<I, T>::type>::type>()} + ',' +
|
|
tuple_name<T, I + 1>();
|
|
if(str.back() == ',')
|
|
str.pop_back();
|
|
return str;
|
|
}
|
|
|
|
/// Print type name for tuples with 2 or more elements
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::tuple_value && type_count_base<T>::value >= 2,
|
|
detail::enabler>>
|
|
inline std::string type_name() {
|
|
auto tname = std::string(1, '[') + tuple_name<T, 0>();
|
|
tname.push_back(']');
|
|
return tname;
|
|
}
|
|
|
|
/// get the type name for a type that has a value_type member
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::container_value ||
|
|
classify_object<T>::value == object_category::wrapper_value,
|
|
detail::enabler>>
|
|
inline std::string type_name() {
|
|
return type_name<typename T::value_type>();
|
|
}
|
|
|
|
// Lexical cast
|
|
|
|
/// Convert to an unsigned integral
|
|
template <typename T, enable_if_t<std::is_unsigned<T>::value, detail::enabler> = detail::dummy>
|
|
bool integral_conversion(const std::string &input, T &output) noexcept {
|
|
if(input.empty()) {
|
|
return false;
|
|
}
|
|
char *val = nullptr;
|
|
std::uint64_t output_ll = std::strtoull(input.c_str(), &val, 0);
|
|
output = static_cast<T>(output_ll);
|
|
if(val == (input.c_str() + input.size()) && static_cast<std::uint64_t>(output) == output_ll) {
|
|
return true;
|
|
}
|
|
val = nullptr;
|
|
std::int64_t output_sll = std::strtoll(input.c_str(), &val, 0);
|
|
if(val == (input.c_str() + input.size())) {
|
|
output = (output_sll < 0) ? static_cast<T>(0) : static_cast<T>(output_sll);
|
|
return (static_cast<std::int64_t>(output) == output_sll);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// Convert to a signed integral
|
|
template <typename T, enable_if_t<std::is_signed<T>::value, detail::enabler> = detail::dummy>
|
|
bool integral_conversion(const std::string &input, T &output) noexcept {
|
|
if(input.empty()) {
|
|
return false;
|
|
}
|
|
char *val = nullptr;
|
|
std::int64_t output_ll = std::strtoll(input.c_str(), &val, 0);
|
|
output = static_cast<T>(output_ll);
|
|
if(val == (input.c_str() + input.size()) && static_cast<std::int64_t>(output) == output_ll) {
|
|
return true;
|
|
}
|
|
if(input == "true") {
|
|
// this is to deal with a few oddities with flags and wrapper int types
|
|
output = static_cast<T>(1);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// Convert a flag into an integer value typically binary flags
|
|
inline std::int64_t to_flag_value(std::string val) {
|
|
static const std::string trueString("true");
|
|
static const std::string falseString("false");
|
|
if(val == trueString) {
|
|
return 1;
|
|
}
|
|
if(val == falseString) {
|
|
return -1;
|
|
}
|
|
val = detail::to_lower(val);
|
|
std::int64_t ret = 0;
|
|
if(val.size() == 1) {
|
|
if(val[0] >= '1' && val[0] <= '9') {
|
|
return (static_cast<std::int64_t>(val[0]) - '0');
|
|
}
|
|
switch(val[0]) {
|
|
case '0':
|
|
case 'f':
|
|
case 'n':
|
|
case '-':
|
|
ret = -1;
|
|
break;
|
|
case 't':
|
|
case 'y':
|
|
case '+':
|
|
ret = 1;
|
|
break;
|
|
default:
|
|
throw std::invalid_argument("unrecognized character");
|
|
}
|
|
return ret;
|
|
}
|
|
if(val == trueString || val == "on" || val == "yes" || val == "enable") {
|
|
ret = 1;
|
|
} else if(val == falseString || val == "off" || val == "no" || val == "disable") {
|
|
ret = -1;
|
|
} else {
|
|
ret = std::stoll(val);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/// Integer conversion
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::integral_value ||
|
|
classify_object<T>::value == object_category::unsigned_integral,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
return integral_conversion(input, output);
|
|
}
|
|
|
|
/// char values
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::char_value, detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
if(input.size() == 1) {
|
|
output = static_cast<T>(input[0]);
|
|
return true;
|
|
}
|
|
return integral_conversion(input, output);
|
|
}
|
|
|
|
/// Boolean values
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::boolean_value, detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
try {
|
|
auto out = to_flag_value(input);
|
|
output = (out > 0);
|
|
return true;
|
|
} catch(const std::invalid_argument &) {
|
|
return false;
|
|
} catch(const std::out_of_range &) {
|
|
// if the number is out of the range of a 64 bit value then it is still a number and for this purpose is still
|
|
// valid all we care about the sign
|
|
output = (input[0] != '-');
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/// Floats
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::floating_point, detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
if(input.empty()) {
|
|
return false;
|
|
}
|
|
char *val = nullptr;
|
|
auto output_ld = std::strtold(input.c_str(), &val);
|
|
output = static_cast<T>(output_ld);
|
|
return val == (input.c_str() + input.size());
|
|
}
|
|
|
|
/// complex
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::complex_number, detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
using XC = typename wrapped_type<T, double>::type;
|
|
XC x{0.0}, y{0.0};
|
|
auto str1 = input;
|
|
bool worked = false;
|
|
auto nloc = str1.find_last_of("+-");
|
|
if(nloc != std::string::npos && nloc > 0) {
|
|
worked = detail::lexical_cast(str1.substr(0, nloc), x);
|
|
str1 = str1.substr(nloc);
|
|
if(str1.back() == 'i' || str1.back() == 'j')
|
|
str1.pop_back();
|
|
worked = worked && detail::lexical_cast(str1, y);
|
|
} else {
|
|
if(str1.back() == 'i' || str1.back() == 'j') {
|
|
str1.pop_back();
|
|
worked = detail::lexical_cast(str1, y);
|
|
x = XC{0};
|
|
} else {
|
|
worked = detail::lexical_cast(str1, x);
|
|
y = XC{0};
|
|
}
|
|
}
|
|
if(worked) {
|
|
output = T{x, y};
|
|
return worked;
|
|
}
|
|
return from_stream(input, output);
|
|
}
|
|
|
|
/// String and similar direct assignment
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::string_assignable, detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
output = input;
|
|
return true;
|
|
}
|
|
|
|
/// String and similar constructible and copy assignment
|
|
template <
|
|
typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::string_constructible, detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
output = T(input);
|
|
return true;
|
|
}
|
|
|
|
/// Enumerations
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::enumeration, detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
typename std::underlying_type<T>::type val;
|
|
if(!integral_conversion(input, val)) {
|
|
return false;
|
|
}
|
|
output = static_cast<T>(val);
|
|
return true;
|
|
}
|
|
|
|
/// wrapper types
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::wrapper_value &&
|
|
std::is_assignable<T &, typename T::value_type>::value,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
typename T::value_type val;
|
|
if(lexical_cast(input, val)) {
|
|
output = val;
|
|
return true;
|
|
}
|
|
return from_stream(input, output);
|
|
}
|
|
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::wrapper_value &&
|
|
!std::is_assignable<T &, typename T::value_type>::value && std::is_assignable<T &, T>::value,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
typename T::value_type val;
|
|
if(lexical_cast(input, val)) {
|
|
output = T{val};
|
|
return true;
|
|
}
|
|
return from_stream(input, output);
|
|
}
|
|
|
|
/// Assignable from double or int
|
|
template <
|
|
typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::number_constructible, detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
int val = 0;
|
|
if(integral_conversion(input, val)) {
|
|
output = T(val);
|
|
return true;
|
|
}
|
|
|
|
double dval = 0.0;
|
|
if(lexical_cast(input, dval)) {
|
|
output = T{dval};
|
|
return true;
|
|
}
|
|
|
|
return from_stream(input, output);
|
|
}
|
|
|
|
/// Assignable from int
|
|
template <
|
|
typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::integer_constructible, detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
int val = 0;
|
|
if(integral_conversion(input, val)) {
|
|
output = T(val);
|
|
return true;
|
|
}
|
|
return from_stream(input, output);
|
|
}
|
|
|
|
/// Assignable from double
|
|
template <
|
|
typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::double_constructible, detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
double val = 0.0;
|
|
if(lexical_cast(input, val)) {
|
|
output = T{val};
|
|
return true;
|
|
}
|
|
return from_stream(input, output);
|
|
}
|
|
|
|
/// Non-string convertible from an int
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::other && std::is_assignable<T &, int>::value,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
int val = 0;
|
|
if(integral_conversion(input, val)) {
|
|
#ifdef _MSC_VER
|
|
#pragma warning(push)
|
|
#pragma warning(disable : 4800)
|
|
#endif
|
|
// with Atomic<XX> this could produce a warning due to the conversion but if atomic gets here it is an old style
|
|
// so will most likely still work
|
|
output = val;
|
|
#ifdef _MSC_VER
|
|
#pragma warning(pop)
|
|
#endif
|
|
return true;
|
|
}
|
|
// LCOV_EXCL_START
|
|
// This version of cast is only used for odd cases in an older compilers the fail over
|
|
// from_stream is tested elsewhere an not relevant for coverage here
|
|
return from_stream(input, output);
|
|
// LCOV_EXCL_STOP
|
|
}
|
|
|
|
/// Non-string parsable by a stream
|
|
template <typename T,
|
|
enable_if_t<classify_object<T>::value == object_category::other && !std::is_assignable<T &, int>::value,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_cast(const std::string &input, T &output) {
|
|
static_assert(is_istreamable<T>::value,
|
|
"option object type must have a lexical cast overload or streaming input operator(>>) defined, if it "
|
|
"is convertible from another type use the add_option<T, XC>(...) with XC being the known type");
|
|
return from_stream(input, output);
|
|
}
|
|
|
|
/// Assign a value through lexical cast operations
|
|
/// Strings can be empty so we need to do a little different
|
|
template <typename AssignTo,
|
|
typename ConvertTo,
|
|
enable_if_t<std::is_same<AssignTo, ConvertTo>::value &&
|
|
(classify_object<AssignTo>::value == object_category::string_assignable ||
|
|
classify_object<AssignTo>::value == object_category::string_constructible),
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_assign(const std::string &input, AssignTo &output) {
|
|
return lexical_cast(input, output);
|
|
}
|
|
|
|
/// Assign a value through lexical cast operations
|
|
template <typename AssignTo,
|
|
typename ConvertTo,
|
|
enable_if_t<std::is_same<AssignTo, ConvertTo>::value && std::is_assignable<AssignTo &, AssignTo>::value &&
|
|
classify_object<AssignTo>::value != object_category::string_assignable &&
|
|
classify_object<AssignTo>::value != object_category::string_constructible,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_assign(const std::string &input, AssignTo &output) {
|
|
if(input.empty()) {
|
|
output = AssignTo{};
|
|
return true;
|
|
}
|
|
|
|
return lexical_cast(input, output);
|
|
}
|
|
|
|
/// Assign a value through lexical cast operations
|
|
template <typename AssignTo,
|
|
typename ConvertTo,
|
|
enable_if_t<std::is_same<AssignTo, ConvertTo>::value && !std::is_assignable<AssignTo &, AssignTo>::value &&
|
|
classify_object<AssignTo>::value == object_category::wrapper_value,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_assign(const std::string &input, AssignTo &output) {
|
|
if(input.empty()) {
|
|
typename AssignTo::value_type emptyVal{};
|
|
output = emptyVal;
|
|
return true;
|
|
}
|
|
return lexical_cast(input, output);
|
|
}
|
|
|
|
/// Assign a value through lexical cast operations for int compatible values
|
|
/// mainly for atomic operations on some compilers
|
|
template <typename AssignTo,
|
|
typename ConvertTo,
|
|
enable_if_t<std::is_same<AssignTo, ConvertTo>::value && !std::is_assignable<AssignTo &, AssignTo>::value &&
|
|
classify_object<AssignTo>::value != object_category::wrapper_value &&
|
|
std::is_assignable<AssignTo &, int>::value,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_assign(const std::string &input, AssignTo &output) {
|
|
if(input.empty()) {
|
|
output = 0;
|
|
return true;
|
|
}
|
|
int val = 0;
|
|
if(lexical_cast(input, val)) {
|
|
output = val;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// Assign a value converted from a string in lexical cast to the output value directly
|
|
template <typename AssignTo,
|
|
typename ConvertTo,
|
|
enable_if_t<!std::is_same<AssignTo, ConvertTo>::value && std::is_assignable<AssignTo &, ConvertTo &>::value,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_assign(const std::string &input, AssignTo &output) {
|
|
ConvertTo val{};
|
|
bool parse_result = (!input.empty()) ? lexical_cast<ConvertTo>(input, val) : true;
|
|
if(parse_result) {
|
|
output = val;
|
|
}
|
|
return parse_result;
|
|
}
|
|
|
|
/// Assign a value from a lexical cast through constructing a value and move assigning it
|
|
template <
|
|
typename AssignTo,
|
|
typename ConvertTo,
|
|
enable_if_t<!std::is_same<AssignTo, ConvertTo>::value && !std::is_assignable<AssignTo &, ConvertTo &>::value &&
|
|
std::is_move_assignable<AssignTo>::value,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_assign(const std::string &input, AssignTo &output) {
|
|
ConvertTo val{};
|
|
bool parse_result = input.empty() ? true : lexical_cast<ConvertTo>(input, val);
|
|
if(parse_result) {
|
|
output = AssignTo(val); // use () form of constructor to allow some implicit conversions
|
|
}
|
|
return parse_result;
|
|
}
|
|
|
|
/// primary lexical conversion operation, 1 string to 1 type of some kind
|
|
template <typename AssignTo,
|
|
typename ConvertTo,
|
|
enable_if_t<classify_object<ConvertTo>::value <= object_category::other &&
|
|
classify_object<AssignTo>::value <= object_category::wrapper_value,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_conversion(const std::vector<std ::string> &strings, AssignTo &output) {
|
|
return lexical_assign<AssignTo, ConvertTo>(strings[0], output);
|
|
}
|
|
|
|
/// Lexical conversion if there is only one element but the conversion type is for two, then call a two element
|
|
/// constructor
|
|
template <typename AssignTo,
|
|
typename ConvertTo,
|
|
enable_if_t<(type_count<AssignTo>::value <= 2) && expected_count<AssignTo>::value == 1 &&
|
|
is_tuple_like<ConvertTo>::value && type_count_base<ConvertTo>::value == 2,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_conversion(const std::vector<std ::string> &strings, AssignTo &output) {
|
|
// the remove const is to handle pair types coming from a container
|
|
typename std::remove_const<typename std::tuple_element<0, ConvertTo>::type>::type v1;
|
|
typename std::tuple_element<1, ConvertTo>::type v2;
|
|
bool retval = lexical_assign<decltype(v1), decltype(v1)>(strings[0], v1);
|
|
if(strings.size() > 1) {
|
|
retval = retval && lexical_assign<decltype(v2), decltype(v2)>(strings[1], v2);
|
|
}
|
|
if(retval) {
|
|
output = AssignTo{v1, v2};
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/// Lexical conversion of a container types of single elements
|
|
template <class AssignTo,
|
|
class ConvertTo,
|
|
enable_if_t<is_mutable_container<AssignTo>::value && is_mutable_container<ConvertTo>::value &&
|
|
type_count<ConvertTo>::value == 1,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_conversion(const std::vector<std ::string> &strings, AssignTo &output) {
|
|
output.erase(output.begin(), output.end());
|
|
if(strings.size() == 1 && strings[0] == "{}") {
|
|
return true;
|
|
}
|
|
bool skip_remaining = false;
|
|
if(strings.size() == 2 && strings[0] == "{}" && is_separator(strings[1])) {
|
|
skip_remaining = true;
|
|
}
|
|
for(const auto &elem : strings) {
|
|
typename AssignTo::value_type out;
|
|
bool retval = lexical_assign<typename AssignTo::value_type, typename ConvertTo::value_type>(elem, out);
|
|
if(!retval) {
|
|
return false;
|
|
}
|
|
output.insert(output.end(), std::move(out));
|
|
if(skip_remaining) {
|
|
break;
|
|
}
|
|
}
|
|
return (!output.empty());
|
|
}
|
|
|
|
/// Lexical conversion for complex types
|
|
template <class AssignTo, class ConvertTo, enable_if_t<is_complex<ConvertTo>::value, detail::enabler> = detail::dummy>
|
|
bool lexical_conversion(const std::vector<std::string> &strings, AssignTo &output) {
|
|
|
|
if(strings.size() >= 2 && !strings[1].empty()) {
|
|
using XC2 = typename wrapped_type<ConvertTo, double>::type;
|
|
XC2 x{0.0}, y{0.0};
|
|
auto str1 = strings[1];
|
|
if(str1.back() == 'i' || str1.back() == 'j') {
|
|
str1.pop_back();
|
|
}
|
|
auto worked = detail::lexical_cast(strings[0], x) && detail::lexical_cast(str1, y);
|
|
if(worked) {
|
|
output = ConvertTo{x, y};
|
|
}
|
|
return worked;
|
|
}
|
|
return lexical_assign<AssignTo, ConvertTo>(strings[0], output);
|
|
}
|
|
|
|
/// Conversion to a vector type using a particular single type as the conversion type
|
|
template <class AssignTo,
|
|
class ConvertTo,
|
|
enable_if_t<is_mutable_container<AssignTo>::value && (expected_count<ConvertTo>::value == 1) &&
|
|
(type_count<ConvertTo>::value == 1),
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_conversion(const std::vector<std ::string> &strings, AssignTo &output) {
|
|
bool retval = true;
|
|
output.clear();
|
|
output.reserve(strings.size());
|
|
for(const auto &elem : strings) {
|
|
|
|
output.emplace_back();
|
|
retval = retval && lexical_assign<typename AssignTo::value_type, ConvertTo>(elem, output.back());
|
|
}
|
|
return (!output.empty()) && retval;
|
|
}
|
|
|
|
// forward declaration
|
|
|
|
/// Lexical conversion of a container types with conversion type of two elements
|
|
template <class AssignTo,
|
|
class ConvertTo,
|
|
enable_if_t<is_mutable_container<AssignTo>::value && is_mutable_container<ConvertTo>::value &&
|
|
type_count_base<ConvertTo>::value == 2,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_conversion(std::vector<std::string> strings, AssignTo &output);
|
|
|
|
/// Lexical conversion of a vector types with type_size >2 forward declaration
|
|
template <class AssignTo,
|
|
class ConvertTo,
|
|
enable_if_t<is_mutable_container<AssignTo>::value && is_mutable_container<ConvertTo>::value &&
|
|
type_count_base<ConvertTo>::value != 2 &&
|
|
((type_count<ConvertTo>::value > 2) ||
|
|
(type_count<ConvertTo>::value > type_count_base<ConvertTo>::value)),
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_conversion(const std::vector<std::string> &strings, AssignTo &output);
|
|
|
|
/// Conversion for tuples
|
|
template <class AssignTo,
|
|
class ConvertTo,
|
|
enable_if_t<is_tuple_like<AssignTo>::value && is_tuple_like<ConvertTo>::value &&
|
|
(type_count_base<ConvertTo>::value != type_count<ConvertTo>::value ||
|
|
type_count<ConvertTo>::value > 2),
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_conversion(const std::vector<std::string> &strings, AssignTo &output); // forward declaration
|
|
|
|
/// Conversion for operations where the assigned type is some class but the conversion is a mutable container or large
|
|
/// tuple
|
|
template <typename AssignTo,
|
|
typename ConvertTo,
|
|
enable_if_t<!is_tuple_like<AssignTo>::value && !is_mutable_container<AssignTo>::value &&
|
|
classify_object<ConvertTo>::value != object_category::wrapper_value &&
|
|
(is_mutable_container<ConvertTo>::value || type_count<ConvertTo>::value > 2),
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_conversion(const std::vector<std ::string> &strings, AssignTo &output) {
|
|
|
|
if(strings.size() > 1 || (!strings.empty() && !(strings.front().empty()))) {
|
|
ConvertTo val;
|
|
auto retval = lexical_conversion<ConvertTo, ConvertTo>(strings, val);
|
|
output = AssignTo{val};
|
|
return retval;
|
|
}
|
|
output = AssignTo{};
|
|
return true;
|
|
}
|
|
|
|
/// function template for converting tuples if the static Index is greater than the tuple size
|
|
template <class AssignTo, class ConvertTo, std::size_t I>
|
|
inline typename std::enable_if<(I >= type_count_base<AssignTo>::value), bool>::type
|
|
tuple_conversion(const std::vector<std::string> &, AssignTo &) {
|
|
return true;
|
|
}
|
|
|
|
/// Conversion of a tuple element where the type size ==1 and not a mutable container
|
|
template <class AssignTo, class ConvertTo>
|
|
inline typename std::enable_if<!is_mutable_container<ConvertTo>::value && type_count<ConvertTo>::value == 1, bool>::type
|
|
tuple_type_conversion(std::vector<std::string> &strings, AssignTo &output) {
|
|
auto retval = lexical_assign<AssignTo, ConvertTo>(strings[0], output);
|
|
strings.erase(strings.begin());
|
|
return retval;
|
|
}
|
|
|
|
/// Conversion of a tuple element where the type size !=1 but the size is fixed and not a mutable container
|
|
template <class AssignTo, class ConvertTo>
|
|
inline typename std::enable_if<!is_mutable_container<ConvertTo>::value && (type_count<ConvertTo>::value > 1) &&
|
|
type_count<ConvertTo>::value == type_count_min<ConvertTo>::value,
|
|
bool>::type
|
|
tuple_type_conversion(std::vector<std::string> &strings, AssignTo &output) {
|
|
auto retval = lexical_conversion<AssignTo, ConvertTo>(strings, output);
|
|
strings.erase(strings.begin(), strings.begin() + type_count<ConvertTo>::value);
|
|
return retval;
|
|
}
|
|
|
|
/// Conversion of a tuple element where the type is a mutable container or a type with different min and max type sizes
|
|
template <class AssignTo, class ConvertTo>
|
|
inline typename std::enable_if<is_mutable_container<ConvertTo>::value ||
|
|
type_count<ConvertTo>::value != type_count_min<ConvertTo>::value,
|
|
bool>::type
|
|
tuple_type_conversion(std::vector<std::string> &strings, AssignTo &output) {
|
|
|
|
std::size_t index{subtype_count_min<ConvertTo>::value};
|
|
const std::size_t mx_count{subtype_count<ConvertTo>::value};
|
|
const std::size_t mx{(std::max)(mx_count, strings.size())};
|
|
|
|
while(index < mx) {
|
|
if(is_separator(strings[index])) {
|
|
break;
|
|
}
|
|
++index;
|
|
}
|
|
bool retval = lexical_conversion<AssignTo, ConvertTo>(
|
|
std::vector<std::string>(strings.begin(), strings.begin() + static_cast<std::ptrdiff_t>(index)), output);
|
|
strings.erase(strings.begin(), strings.begin() + static_cast<std::ptrdiff_t>(index) + 1);
|
|
return retval;
|
|
}
|
|
|
|
/// Tuple conversion operation
|
|
template <class AssignTo, class ConvertTo, std::size_t I>
|
|
inline typename std::enable_if<(I < type_count_base<AssignTo>::value), bool>::type
|
|
tuple_conversion(std::vector<std::string> strings, AssignTo &output) {
|
|
bool retval = true;
|
|
using ConvertToElement = typename std::
|
|
conditional<is_tuple_like<ConvertTo>::value, typename std::tuple_element<I, ConvertTo>::type, ConvertTo>::type;
|
|
if(!strings.empty()) {
|
|
retval = retval && tuple_type_conversion<typename std::tuple_element<I, AssignTo>::type, ConvertToElement>(
|
|
strings, std::get<I>(output));
|
|
}
|
|
retval = retval && tuple_conversion<AssignTo, ConvertTo, I + 1>(std::move(strings), output);
|
|
return retval;
|
|
}
|
|
|
|
/// Lexical conversion of a container types with tuple elements of size 2
|
|
template <class AssignTo,
|
|
class ConvertTo,
|
|
enable_if_t<is_mutable_container<AssignTo>::value && is_mutable_container<ConvertTo>::value &&
|
|
type_count_base<ConvertTo>::value == 2,
|
|
detail::enabler>>
|
|
bool lexical_conversion(std::vector<std::string> strings, AssignTo &output) {
|
|
output.clear();
|
|
while(!strings.empty()) {
|
|
|
|
typename std::remove_const<typename std::tuple_element<0, typename ConvertTo::value_type>::type>::type v1;
|
|
typename std::tuple_element<1, typename ConvertTo::value_type>::type v2;
|
|
bool retval = tuple_type_conversion<decltype(v1), decltype(v1)>(strings, v1);
|
|
if(!strings.empty()) {
|
|
retval = retval && tuple_type_conversion<decltype(v2), decltype(v2)>(strings, v2);
|
|
}
|
|
if(retval) {
|
|
output.insert(output.end(), typename AssignTo::value_type{v1, v2});
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
return (!output.empty());
|
|
}
|
|
|
|
/// lexical conversion of tuples with type count>2 or tuples of types of some element with a type size>=2
|
|
template <class AssignTo,
|
|
class ConvertTo,
|
|
enable_if_t<is_tuple_like<AssignTo>::value && is_tuple_like<ConvertTo>::value &&
|
|
(type_count_base<ConvertTo>::value != type_count<ConvertTo>::value ||
|
|
type_count<ConvertTo>::value > 2),
|
|
detail::enabler>>
|
|
bool lexical_conversion(const std::vector<std ::string> &strings, AssignTo &output) {
|
|
static_assert(
|
|
!is_tuple_like<ConvertTo>::value || type_count_base<AssignTo>::value == type_count_base<ConvertTo>::value,
|
|
"if the conversion type is defined as a tuple it must be the same size as the type you are converting to");
|
|
return tuple_conversion<AssignTo, ConvertTo, 0>(strings, output);
|
|
}
|
|
|
|
/// Lexical conversion of a vector types for everything but tuples of two elements and types of size 1
|
|
template <class AssignTo,
|
|
class ConvertTo,
|
|
enable_if_t<is_mutable_container<AssignTo>::value && is_mutable_container<ConvertTo>::value &&
|
|
type_count_base<ConvertTo>::value != 2 &&
|
|
((type_count<ConvertTo>::value > 2) ||
|
|
(type_count<ConvertTo>::value > type_count_base<ConvertTo>::value)),
|
|
detail::enabler>>
|
|
bool lexical_conversion(const std::vector<std ::string> &strings, AssignTo &output) {
|
|
bool retval = true;
|
|
output.clear();
|
|
std::vector<std::string> temp;
|
|
std::size_t ii{0};
|
|
std::size_t icount{0};
|
|
std::size_t xcm{type_count<ConvertTo>::value};
|
|
auto ii_max = strings.size();
|
|
while(ii < ii_max) {
|
|
temp.push_back(strings[ii]);
|
|
++ii;
|
|
++icount;
|
|
if(icount == xcm || is_separator(temp.back()) || ii == ii_max) {
|
|
if(static_cast<int>(xcm) > type_count_min<ConvertTo>::value && is_separator(temp.back())) {
|
|
temp.pop_back();
|
|
}
|
|
typename AssignTo::value_type temp_out;
|
|
retval = retval &&
|
|
lexical_conversion<typename AssignTo::value_type, typename ConvertTo::value_type>(temp, temp_out);
|
|
temp.clear();
|
|
if(!retval) {
|
|
return false;
|
|
}
|
|
output.insert(output.end(), std::move(temp_out));
|
|
icount = 0;
|
|
}
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/// conversion for wrapper types
|
|
template <typename AssignTo,
|
|
class ConvertTo,
|
|
enable_if_t<classify_object<ConvertTo>::value == object_category::wrapper_value &&
|
|
std::is_assignable<ConvertTo &, ConvertTo>::value,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_conversion(const std::vector<std::string> &strings, AssignTo &output) {
|
|
if(strings.empty() || strings.front().empty()) {
|
|
output = ConvertTo{};
|
|
return true;
|
|
}
|
|
typename ConvertTo::value_type val;
|
|
if(lexical_conversion<typename ConvertTo::value_type, typename ConvertTo::value_type>(strings, val)) {
|
|
output = ConvertTo{val};
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// conversion for wrapper types
|
|
template <typename AssignTo,
|
|
class ConvertTo,
|
|
enable_if_t<classify_object<ConvertTo>::value == object_category::wrapper_value &&
|
|
!std::is_assignable<AssignTo &, ConvertTo>::value,
|
|
detail::enabler> = detail::dummy>
|
|
bool lexical_conversion(const std::vector<std::string> &strings, AssignTo &output) {
|
|
using ConvertType = typename ConvertTo::value_type;
|
|
if(strings.empty() || strings.front().empty()) {
|
|
output = ConvertType{};
|
|
return true;
|
|
}
|
|
ConvertType val;
|
|
if(lexical_conversion<typename ConvertTo::value_type, typename ConvertTo::value_type>(strings, val)) {
|
|
output = val;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// Sum a vector of strings
|
|
inline std::string sum_string_vector(const std::vector<std::string> &values) {
|
|
double val{0.0};
|
|
bool fail{false};
|
|
std::string output;
|
|
for(const auto &arg : values) {
|
|
double tv{0.0};
|
|
auto comp = detail::lexical_cast<double>(arg, tv);
|
|
if(!comp) {
|
|
try {
|
|
tv = static_cast<double>(detail::to_flag_value(arg));
|
|
} catch(const std::exception &) {
|
|
fail = true;
|
|
break;
|
|
}
|
|
}
|
|
val += tv;
|
|
}
|
|
if(fail) {
|
|
for(const auto &arg : values) {
|
|
output.append(arg);
|
|
}
|
|
} else {
|
|
if(val <= static_cast<double>((std::numeric_limits<std::int64_t>::min)()) ||
|
|
val >= static_cast<double>((std::numeric_limits<std::int64_t>::max)()) ||
|
|
// NOLINTNEXTLINE(clang-diagnostic-float-equal,bugprone-narrowing-conversions)
|
|
val == static_cast<std::int64_t>(val)) {
|
|
output = detail::value_string(static_cast<int64_t>(val));
|
|
} else {
|
|
output = detail::value_string(val);
|
|
}
|
|
}
|
|
return output;
|
|
}
|
|
|
|
} // namespace detail
|
|
// [CLI11:type_tools_hpp:end]
|
|
} // namespace CLI
|