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Alexis Pereda
2021-05-10 18:10:51 +02:00
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build/

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cmake_minimum_required(VERSION 3.0)
get_filename_component(project_name ${CMAKE_CURRENT_SOURCE_DIR} NAME)
project(${project_name})
set(EXTENSION "cpp")
set(CMAKE_C_STANDARD 99)
set(CMAKE_CXX_STANDARD 14)
set(GEN_BINARY OFF)
set(GEN_LIBRARY OFF)
set(LIB_TYPE STATIC) # NONE, STATIC, SHARED, MODULE
set(LIBS_TYPE NONE)
set(FLAGS_ANY "-Wall -Wextra -Winline")
set(FLAGS_DEBUG "-DDEBUG -Og -pg")
set(FLAGS_RELEASE "-DNDEBUG -O2")
set(SRCDIRS src)
set(LIBSDIRS src)
set(TESTSDIRS tests)
set(EXAMPLESDIRS )
set(MANDIRS )
set(INCLUDE_DIRS inc)
set(LIBRARIES "")
set(USER_LIBRARIES "")
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${FLAGS_ANY}")
set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${FLAGS_ANY} ${FLAGS_DEBUG}")
set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${FLAGS_ANY} ${FLAGS_RELEASE}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${FLAGS_ANY}")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${FLAGS_ANY} ${FLAGS_DEBUG}")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${FLAGS_ANY} ${FLAGS_RELEASE}")
## Libraries
if(NOT ${LIB_TYPE} MATCHES "^NONE$")
# Project library
if(GEN_LIBRARY)
set(lib_src "")
foreach(srcdir ${SRCDIRS})
set(srcpath ${CMAKE_CURRENT_SOURCE_DIR}/${srcdir})
file(GLOB_RECURSE tmpsrc ${srcpath}/*.${EXTENSION})
list(APPEND lib_src ${tmpsrc})
endforeach()
set(lib ${PROJECT_NAME})
if(lib_src)
message(STATUS "+ Library: ${lib}")
add_library(${lib} ${LIB_TYPE} ${lib_src})
target_include_directories(${lib} PUBLIC ${INCLUDE_DIRS})
target_link_libraries(${lib} ${LIBRARIES})
list(APPEND USER_LIBRARIES ${lib})
else()
message(WARNING "! Library ${lib}: no sources")
endif()
endif()
endif()
## Other libraries
if(NOT ${LIBS_TYPE} MATCHES "^NONE$")
foreach(libsdir ${LIBSDIRS})
set(libspath ${CMAKE_CURRENT_SOURCE_DIR}/${libsdir})
file(GLOB libs RELATIVE ${libspath} ${libspath}/*)
if(libs)
foreach(child ${libs})
set(lib "")
if(IS_DIRECTORY ${libspath}/${child})
set(lib ${child})
file(GLOB_RECURSE lib_src ${libspath}/${child}/*.${EXTENSION})
else()
message(WARNING "! Ignoring file: ${libsdir}/${child}")
endif()
if(lib)
if(lib_src)
message(STATUS "+ Library: ${lib}")
add_library(${lib} ${LIBS_TYPE} ${lib_src})
target_include_directories(${lib} PUBLIC ${INCLUDE_DIRS})
target_link_libraries(${lib} ${LIBRARIES})
list(APPEND USER_LIBRARIES ${lib})
else()
message(WARNING "! Library ${lib}: no sources")
endif()
endif()
endforeach()
endif()
endforeach()
endif()
## Binary
if(GEN_BINARY)
set(src "")
foreach(srcdir ${SRCDIRS})
set(srcpath ${CMAKE_CURRENT_SOURCE_DIR}/${srcdir})
file(GLOB_RECURSE tmpsrc ${srcpath}/*.${EXTENSION})
list(APPEND src ${tmpsrc})
endforeach()
set(bin ${PROJECT_NAME})
if(src)
if(GEN_LIBRARY)
set(bin ${bin}.bin)
endif()
message(STATUS "+ Binary: ${bin}")
add_executable(${bin} ${src})
target_include_directories(${bin} PUBLIC ${LIBSDIRS} ${INCLUDE_DIRS})
target_link_libraries(${bin} ${LIBRARIES} ${USER_LIBRARIES})
else()
message(WARNING "! Binary ${bin}: no sources")
endif()
endif()
## Tests
foreach(testsdir ${TESTSDIRS})
set(testspath ${CMAKE_CURRENT_SOURCE_DIR}/${testsdir})
file(GLOB_RECURSE tests_src ${testspath}/*.${EXTENSION})
if(tests_src)
set(tests ${testsdir}_${PROJECT_NAME})
message(STATUS "+ Tests: ${tests}")
add_executable(${tests} ${tests_src})
target_compile_options(${tests} PUBLIC ${${testsdir}_FLAGS})
target_include_directories(${tests} PUBLIC ${SRCDIRS} ${LIBSDIRS} ${INCLUDE_DIRS} ${${testsdir}_INCLUDE_DIRS})
target_link_libraries(${tests} ${LIBRARIES} ${USER_LIBRARIES} ${${testsdir}_LIBRARIES})
endif()
endforeach()
## Examples
foreach(examplesdir ${EXAMPLESDIRS})
set(examplespath ${CMAKE_CURRENT_SOURCE_DIR}/${examplesdir})
file(GLOB examples RELATIVE ${examplespath} ${examplespath}/*)
if(examples)
foreach(child ${examples})
set(example_bin_filename "")
set(example "")
if(IS_DIRECTORY ${examplespath}/${child})
set(example_bin_filename ${child})
set(example ${examplesdir}_${example_bin_filename})
file(GLOB_RECURSE example_src ${examplespath}/${child}/*.${EXTENSION})
else()
get_filename_component(extension ${child} EXT)
if(${extension} MATCHES "^.${EXTENSION}$")
get_filename_component(example_name ${child} NAME_WE)
set(example_bin_filename ${example_name})
set(example ${examplesdir}_${example_bin_filename})
set(example_src ${examplespath}/${child})
endif()
endif()
if(example)
if(example_src)
message(STATUS "+ Example: ${examplesdir}/${example}")
add_executable(${example} ${example_src})
target_include_directories(${example} PUBLIC ${SRCDIRS} ${LIBSDIRS} ${INCLUDE_DIRS})
target_link_libraries(${example} ${LIBRARIES} ${USER_LIBRARIES})
set_target_properties(${example} PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/${examplesdir})
set_target_properties(${example} PROPERTIES OUTPUT_NAME ${example_bin_filename})
else()
message(WARNING "! Example ${example}: no sources")
endif()
endif()
endforeach()
endif()
endforeach()
## Man pages
foreach(mandir ${MANDIRS})
set(MANPATH ${CMAKE_CURRENT_SOURCE_DIR}/${mandir})
set(MAN_OUTPATH ${CMAKE_BINARY_DIR}/deb/usr/share/man)
file(GLOB_RECURSE man_src RELATIVE ${MANPATH} ${MANPATH}/*)
if(man_src)
set(man_outfiles "")
foreach(man_file IN LISTS man_src)
set(man_outfile ${MAN_OUTPATH}/${man_file}.gz)
get_filename_component(man_outdir ${man_outfile} DIRECTORY)
list(APPEND man_outfiles ${man_outfile})
message(STATUS "+ manpage: ${man_file}")
add_custom_command(OUTPUT ${man_outfile}
COMMAND ${CMAKE_COMMAND} -E make_directory ${man_outdir}
COMMAND ${CMAKE_COMMAND} -E copy ${MANPATH}/${man_file} ${MAN_OUTPATH}/${man_file}
COMMAND gzip -f ${MAN_OUTPATH}/${man_file}
DEPENDS ${MANPATH}/${man_file})
endforeach()
add_custom_target(man ALL DEPENDS ${man_outfiles})
endif()
endforeach()

674
LICENSE Normal file
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GNU GENERAL PUBLIC LICENSE
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A patent license is "discriminatory" if it does not include within
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for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all. For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
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License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
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to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
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IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
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PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
pfor
Copyright (C) 2021 phd / dev
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) 2021 phd / dev
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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# About
This template metaprogramming library is part of my Ph.D. thesis work and is used in main
projects.
## Organisation
Main directories:
- `src`: the library sources.
## Usage
To produce the `Makefile` and build the project:
```bash
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make
```
To run unit testing:
```bash
./build/tests_pfor
```

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#ifndef TMP_ALGORITHM_H
#define TMP_ALGORITHM_H
#include "packalgo.h"
#include "treealgo.h"
#endif

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#ifndef TMP_BIND_H
#define TMP_BIND_H
#include "packalgo.h"
namespace tmp {
template<template<typename...> class TT, typename C>
struct Bind2nd {
template<typename T, typename... Ts>
using F = TT<T, C>;
};
template<typename ValueType, template<typename, ValueType, typename...> class TT, ValueType V>
struct Bind2ndV {
template<typename T, typename... Ts>
using F = TT<T, V>;
};
}
#endif

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#ifndef TMP_DEBUG_H
#define TMP_DEBUG_H
/**
* @file tmp/debug.h
* @brief compile-time typename to string resolution
*
* see: https://stackoverflow.com/questions/81870/is-it-possible-to-print-a-variables-type-in-standard-c
* see: https://stackoverflow.com/a/20170989
*
* Adapted, minimal C++ version supported is C++14
*/
#include <cstdio>
#include "stringview.h"
namespace tmp {
namespace detail {
constexpr unsigned strlen(char const*str) {
unsigned l = 0;
while(*str++) ++l;
return l;
}
}
/**
* @brief compile-time typename to string resolution
*
* @param[in] T type to resolve
*
* @return constexpr string_view containing the typename
*
* TODO this function has not been tested for Windows
*/
template<typename T>
constexpr string_view typeName() {
#if defined(__clang__)
string_view p = __PRETTY_FUNCTION__;
constexpr auto leftDummy = detail::strlen("tmp::string_view tmp::typeName() [T = ");
constexpr auto rightDummy = detail::strlen("]");
#elif defined(__GNUC__)
string_view p = __PRETTY_FUNCTION__;
constexpr auto leftDummy = detail::strlen("constexpr tmp::string_view tmp::typeName() [with T = ");
constexpr auto rightDummy = detail::strlen("]");
#elif defined(_MSC_VER)
string_view p = __FUNCSIG__;
constexpr auto leftDummy = detail::strlen("");
constexpr auto rightDummy = detail::strlen("");
#else
return {"[err: tmp::typeNameF is not implemented for your compiler]"};
#endif
#if defined(__clang__) || defined(__GNUC__) || defined(__MSC_VER)
return string_view(p.data() + leftDummy, p.size() - leftDummy - rightDummy);
#endif
}
template<typename... As, typename... Ts>
std::string strTypes(Ts...) {
using Fold = int[];
std::string result;
static_cast<void>(Fold{(result += std::string{typeName<As>()} + ", ", 0)...});
static_cast<void>(Fold{(result += std::string{typeName<Ts>()} + ", ", 0)...});
if(result.empty()) return "";
else return result.substr(0, result.size()-2);
}
template<typename... As, typename... Ts>
void printTypes(Ts...) {
std::puts(strTypes<As..., Ts...>().c_str());
}
}
#endif

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#ifndef TMP_PACK_H
#define TMP_PACK_H
#include "utility.h"
namespace tmp {
/**
* Pack
*/
template<typename... Ts> struct Pack {
static constexpr Size size = sizeof...(Ts);
};
/**
* PackHead
*/
template<typename> struct PackHeadImpl;
template<typename T, typename... Ts>
struct PackHeadImpl<Pack<T, Ts...>> {
using type = T;
};
template<typename T>
using PackHead = typename PackHeadImpl<T>::type;
/**
* PackTrail
*/
template<typename> struct PackTrailImpl;
template<typename T, typename... Ts>
struct PackTrailImpl<Pack<T, Ts...>> {
using type = Pack<Ts...>;
};
template<typename T>
using PackTrail = typename PackTrailImpl<T>::type;
/**
* PackGet
*/
template<typename, Size> struct PackGetImpl;
template<typename T, typename... Ts, Size I>
struct PackGetImpl<Pack<T, Ts...>, I> {
using type = typename PackGetImpl<Pack<Ts...>, I-1>::type;
};
template<typename T, typename... Ts>
struct PackGetImpl<Pack<T, Ts...>, 0> {
using type = T;
};
template<typename T, Size I>
using PackGet = typename PackGetImpl<T, I>::type;
/**
* PackPushFront
*/
template<typename, typename> struct PackPushFrontImpl;
template<typename... Ts, typename T>
struct PackPushFrontImpl<Pack<Ts...>, T> {
using type = Pack<T, Ts...>;
};
template<typename P, typename T>
using PackPushFront = typename PackPushFrontImpl<P, T>::type;
/**
* PackPushBack
*/
template<typename, typename> struct PackPushBackImpl;
template<typename... Ts, typename T>
struct PackPushBackImpl<Pack<Ts...>, T> {
using type = Pack<Ts..., T>;
};
template<typename P, typename T>
using PackPushBack = typename PackPushBackImpl<P, T>::type;
/**
* PackCat
*/
template<typename...> struct PackCatImpl;
template<typename... Ts, typename... Us, typename... Packs>
struct PackCatImpl<Pack<Ts...>, Pack<Us...>, Packs...> {
using type = typename PackCatImpl<Pack<Ts..., Us...>, Packs...>::type;
};
template<typename... Ts>
struct PackCatImpl<Pack<Ts...>> {
using type = Pack<Ts...>;
};
template<>
struct PackCatImpl<> {
using type = Pack<>;
};
template<typename... Packs>
using PackCat = typename PackCatImpl<Packs...>::type;
/**
* PackReverse
*/
template<typename> struct PackReverseImpl;
template<typename T, typename... Ts>
struct PackReverseImpl<Pack<T, Ts...>> {
using type = PackPushBack<typename PackReverseImpl<Pack<Ts...>>::type, T>;
};
template<>
struct PackReverseImpl<Pack<>> {
using type = Pack<>;
};
template<typename P>
using PackReverse = typename PackReverseImpl<P>::type;
/**
* PackReplace
*/
template<typename, typename, typename> struct PackReplaceImpl;
template<typename Before, typename After, typename Current, typename... Ts>
struct PackReplaceImpl<Pack<Current, Ts...>, Before, After> {
using type = PackCat<Pack<Current>, typename PackReplaceImpl<Pack<Ts...>, Before, After>::type>;
};
template<typename Before, typename After, typename... Ts>
struct PackReplaceImpl<Pack<Before, Ts...>, Before, After> {
using type = PackCat<Pack<After>, typename PackReplaceImpl<Pack<Ts...>, Before, After>::type>;
};
template<typename Before, typename After>
struct PackReplaceImpl<Pack<>, Before, After> {
using type = Pack<>;
};
template<typename P, typename Before, typename After>
using PackReplace = typename PackReplaceImpl<P, Before, After>::type;
/**
* Repack
*/
template<template<typename...> class, typename> struct RepackImpl;
template<template<typename...> class Out, template<typename...> class In, typename... Ts>
struct RepackImpl<Out, In<Ts...>> {
using type = Out<Ts...>;
};
template<template<typename...> class Out, typename In>
using Repack = typename RepackImpl<Out, In>::type;
/**
* AsPack
*/
template<typename T>
using AsPack = Repack<Pack, T>;
}
#endif

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#ifndef TMP_PACKALGO_H
#define TMP_PACKALGO_H
#include "pack.h"
#include "traits.h"
namespace tmp {
/**
* Transform
*/
template<typename T, template<typename...> class> struct TransformImpl;
template<typename T, typename... Ts, template<typename...> class F>
struct TransformImpl<Pack<T, Ts...>, F> {
using type = PackPushFront<typename TransformImpl<Pack<Ts...>, F>::type, F<T>>;
};
template<template<typename...> class F>
struct TransformImpl<Pack<>, F> {
using type = Pack<>;
};
template<typename P, template<typename...> class F>
using Transform = typename TransformImpl<P, F>::type;
/**
* Accumulate
*/
template<typename T, template<typename...> class, typename> struct AccumulateImpl;
template<typename T, typename... Ts, template<typename...> class F, typename A>
struct AccumulateImpl<Pack<T, Ts...>, F, A> {
using type = typename AccumulateImpl<Pack<Ts...>, F, F<A, T>>::type;
};
template<template<typename...> class F, typename A>
struct AccumulateImpl<Pack<>, F, A> {
using type = A;
};
template<typename P, template<typename...> class F, typename A>
using Accumulate = typename AccumulateImpl<P, F, A>::type;
/**
* Filter
*/
template<typename T, template<typename...> class> struct FilterImpl;
template<typename T, typename... Ts, template<typename...> class F>
struct FilterImpl<Pack<T, Ts...>, F> {
using next = typename FilterImpl<Pack<Ts...>, F>::type;
using type = std::conditional_t<F<T>::value, PackPushFront<next, T>, next>;
};
template<template<typename...> class F>
struct FilterImpl<Pack<>, F> {
using type = Pack<>;
};
template<typename P, template<typename...> class F>
using Filter = typename FilterImpl<P, F>::type;
/**
* Cut
*/
template<typename T, typename, template<typename...> class> struct CutImpl;
template<typename R, typename... Rs, typename... Ls, template<typename...> class F>
struct CutImpl<Pack<Ls...>, Pack<R, Rs...>, F> {
using next = typename CutImpl<Pack<Ls..., R>, Pack<Rs...>, F>::type;
using type = std::conditional_t<F<R>::value, next, Pack<Pack<Ls...>, Pack<R, Rs...>>>;
};
template<typename... Ls, template<typename...> class F>
struct CutImpl<Pack<Ls...>, Pack<>, F> {
using type = Pack<Pack<Ls...>, Pack<>>;
};
template<template<typename...> class F>
struct CutImpl<Pack<>, Pack<>, F> {
using type = Pack<Pack<>, Pack<>>;
};
template<typename P, template<typename...> class F>
using Cut = typename CutImpl<Pack<>, P, F>::type;
/**
* Reverse
*/
template<typename> struct ReverseImpl;
template<typename T, typename... Ts>
struct ReverseImpl<Pack<T, Ts...>> {
using type = PackPushBack<typename ReverseImpl<Pack<Ts...>>::type, T>;
};
template<>
struct ReverseImpl<Pack<>> {
using type = Pack<>;
};
template<typename T>
using Reverse = typename ReverseImpl<T>::type;
}
#endif

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#ifndef TMP_STRINGVIEW_H
#define TMP_STRINGVIEW_H
/**
* @file tmp/stringview.h"
* @brief partial implementation of C++17 std::string_view
*
* see: https://stackoverflow.com/questions/81870/is-it-possible-to-print-a-variables-type-in-standard-c
* see: https://stackoverflow.com/a/20170989
* string_view is from "static_string" class
* to be replaced by std::string_view as soon as possible
*
* Adapted, minimal C++ version supported now C++11
*/
#include <stdexcept>
namespace tmp {
class string_view {
char const* const _p;
std::size_t const _sz;
public:
using const_iterator = char const*;
template<std::size_t N>
constexpr string_view(char const(&a)[N]) noexcept: _p(a), _sz(N-1) {}
constexpr string_view(char const*p, std::size_t N) noexcept: _p(p), _sz(N) {}
constexpr char const*data() const noexcept {return _p;}
constexpr std::size_t size() const noexcept {return _sz;}
constexpr const_iterator begin() const noexcept {return _p;}
constexpr const_iterator end() const noexcept {return _p + _sz;}
constexpr char operator[](std::size_t n) const {
return n < _sz? _p[n] : throw std::out_of_range("string_view");
}
explicit operator std::string() const { return {_p, _sz}; }
};
template<typename Ostream>
inline Ostream&operator<<(Ostream &os, string_view const&s) {
os.write(s.data(), s.size());
return os;
}
}
#endif

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#ifndef TMP_TRAITS_H
#define TMP_TRAITS_H
#include <type_traits>
#include "pack.h"
namespace tmp {
/**
* void_t
*
* as of C++17, use std::void_t instead
*/
template<typename...> using void_t = void;
/**
* Void
*
* use to replace `void` when an instance is required
*/
struct Void {};
// TODO: remove it?
template<typename Ostream>
Ostream &operator<<(Ostream &os, Void const&) {
return os << "Void{}";
}
/**
* dependentFalse
*/
template<typename...>
constexpr bool dependentFalse = false;
/**
* ReturnType
*/
template<typename> struct ReturnTypeImpl;
template<typename R, typename... Ts>
struct ReturnTypeImpl<R(Ts...)> {
using type = R;
};
template<typename T>
using ReturnType = typename ReturnTypeImpl<T>::type;
/**
* Parameters
*/
template<typename> struct ParametersImpl;
template<typename R, typename... Ps>
struct ParametersImpl<R(Ps...)> {
using type = Pack<Ps...>;
};
template<typename T>
using Parameters = typename ParametersImpl<T>::type;
/**
* invoke_result
* as of C++17, use std::invoke_result instead
*/
template<typename F, typename... Args>
using invoke_result = std::result_of<F(Args...)>;
template<typename F, typename... Args>
using invoke_result_t = typename invoke_result<F, Args...>::type;
/**
* FunctionCat
*/
template<typename, typename> struct FunctionCatImpl;
template<typename Ret, typename... Ts, typename... Us>
struct FunctionCatImpl<Ret(Ts...), Ret(Us...)> {
using type = Ret(Ts..., Us...);
};
template<typename F1, typename F2>
using FunctionCat = typename FunctionCatImpl<F1, F2>::type;
}
#endif

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#ifndef TMP_TREE_H
#define TMP_TREE_H
#include "bind.h"
#include "pack.h"
#include "packalgo.h"
#include "utility.h"
namespace tmp {
/**
* Tree
*/
template<typename...> struct Tree;
template<typename N, typename... Cs>
struct Tree<N, Cs...> {
using node = N;
using children = Pack<Cs...>;
};
template<>
struct Tree<> {};
/**
* TreeNode
*
* for use in flat tree representations
*/
enum class TreeNodeType { Branch, Leaf };
template<Depth D, typename T, TreeNodeType N>
struct TreeNode {
static constexpr Depth depth = D;
using type = T;
static constexpr TreeNodeType nodeType = N;
};
template<typename T, TreeNodeType NT = TreeNodeType::Branch>
using TreeRoot = TreeNode<0, T, NT>;
template<Depth D, typename T>
using TreeBranch = TreeNode<D, T, TreeNodeType::Branch>;
template<Depth D, typename T>
using TreeLeaf = TreeNode<D, T, TreeNodeType::Leaf>;
/**
* TreeIsLeaf
*/
template<typename> struct TreeIsLeafImpl: std::true_type {};
template<typename... Ts>
struct TreeIsLeafImpl<Tree<Ts...>>: std::false_type {};
template<typename T>
constexpr bool TreeIsLeaf = TreeIsLeafImpl<T>::value;
/**
* PackFromTreeNLR
*
* creates a pack from a tree using NLR
* tree traversal algorithm
*/
template<typename, Depth=0> struct PackFromTreeNLRImpl;
template<typename N, typename... LRs, Depth D>
struct PackFromTreeNLRImpl<Tree<N, LRs...>, D> {
using type = PackPushFront<
PackCat<typename PackFromTreeNLRImpl<LRs, D+1>::type...>,
TreeBranch<D, N>
>;
};
template<typename N, Depth D>
struct PackFromTreeNLRImpl<Tree<N>, D> {
using type = Pack<TreeLeaf<D, N>>;
};
template<Depth D>
struct PackFromTreeNLRImpl<Tree<>, D> {
using type = Pack<>;
};
template<typename T, Depth D = 0>
using PackFromTreeNLR = typename PackFromTreeNLRImpl<T, D>::type;
/**
* TreeFromPackNLR
*
* creates a tree from a pack
* reverses PackFromTreeNLR
*/
namespace detail {
template<Depth D, typename T>
using PartialTree = Pack<std::integral_constant<decltype(D), D>, T>;
template<Depth LIM>
struct GreaterThan {
template<typename T, typename=void> struct CmpImpl;
template<Depth D, typename T>
struct CmpImpl<PartialTree<D, T>>: std::integral_constant<bool, (D > LIM)> {};
template<typename T>
struct CmpImpl<T>: std::true_type {};
template<typename T>
using Cmp = CmpImpl<T>;
};
}
/* property:
* one block either groups future blocks or
* has a bigger or equal depth than following
*
* property:
* the list of depths when building is always
* decreasing (quite easy to demonstrate)
*/
template<typename, typename=void> struct TreeFromPackNLRImpl;
template<Depth D, typename T, typename... Ns>
struct TreeFromPackNLRImpl<Pack<TreeBranch<D, T>, Ns...>, std::enable_if_t<D != 0>> {
using next = typename TreeFromPackNLRImpl<Pack<Ns...>>::subtree;
using cutd = Cut<next, detail::GreaterThan<D>::template Cmp>;
using children = Transform<PackGet<cutd, 0>, Bind2ndV<Size, PackGet, 1>::template F>;
using siblings = PackGet<cutd, 1>;
using part = detail::PartialTree<D, Repack<Tree, PackPushFront<children, T>>>;
using subtree = PackPushFront<siblings, part>;
using type = Repack<Tree, subtree>;
};
template<typename T, TreeNodeType NT, typename... Ns>
struct TreeFromPackNLRImpl<Pack<TreeRoot<T, NT>, Ns...>> {
using next = typename TreeFromPackNLRImpl<Pack<Ns...>>::subtree;
using children = Transform<next, Bind2ndV<Size, PackGet, 1>::template F>;
using subtree = PackPushFront<children, T>;
using type = Repack<Tree, subtree>;
};
template<Depth D, typename T, typename... Ns>
struct TreeFromPackNLRImpl<Pack<TreeLeaf<D, T>, Ns...>, std::enable_if_t<D != 0>> {
using part = detail::PartialTree<D, Tree<T>>;
using subtree = PackPushFront<typename TreeFromPackNLRImpl<Pack<Ns...>>::subtree, part>;
using type = Repack<Tree, subtree>;
};
template<>
struct TreeFromPackNLRImpl<Pack<>> {
using subtree = Pack<>;
using type = Repack<Tree, subtree>;
};
template<typename P>
using TreeFromPackNLR = typename TreeFromPackNLRImpl<P>::type;
}
#endif

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#ifndef TMP_TREEALGO_H
#define TMP_TREEALGO_H
#include "packalgo.h"
#include "tree.h"
#include "utility.h"
namespace tmp {
/**
* TreeTransform
*/
template<typename T, template<typename...> class> struct TreeTransformImpl;
template<typename T, typename... Ts, template<typename...> class F>
struct TreeTransformImpl<Tree<T, Ts...>, F> {
using type = Tree<F<T>, typename TreeTransformImpl<Ts, F>::type...>;
};
template<template<typename...> class F>
struct TreeTransformImpl<Tree<>, F> {
using type = Tree<>;
};
template<typename T, template<typename...> class F>
using TreeTransform = typename TreeTransformImpl<T, F>::type;
/**
* TreeAccumulate
*/
template<typename T, template<typename...> class, typename> struct TreeAccumulateImpl;
template<typename T, typename... Ts, template<typename...> class F, typename A>
struct TreeAccumulateImpl<Tree<T, Ts...>, F, A> {
using type = F<T, typename TreeAccumulateImpl<Ts, F, A>::type...>;
};
template<typename T, template<typename...> class F, typename A>
struct TreeAccumulateImpl<Tree<T>, F, A> {
using type = F<T, A>;
};
template<template<typename...> class F, typename A>
struct TreeAccumulateImpl<Tree<>, F, A> {
using type = A;
};
template<typename T, template<typename...> class F, typename A>
using TreeAccumulate = typename TreeAccumulateImpl<T, F, A>::type;
/**
* TreeNLRAccumulate
*/
template<typename T, template<typename, typename> class F, typename A>
using TreeNLRAccumulate = Accumulate<Transform<PackFromTreeNLR<T>, GetType>, F, A>;
/**
* TreeHeight
*/
template<typename T>
struct TreeHeightImpl {
template<typename, typename... Ts>
using CalcHeight = std::integral_constant<Depth, 1 + detail::Max<Ts::type::value...>>;
using CalcHeightDefault = std::integral_constant<Depth, -1>;
static constexpr Depth value = TreeAccumulate<T, CalcHeight, CalcHeightDefault>::value;
};
template<typename T>
constexpr Depth TreeHeight = TreeHeightImpl<T>::value;
/**
* TreeAllRTLPaths
*/
namespace detail {
template<typename T>
struct PackPushFronter {
template<typename P>
using Do = PackPushFront<P, T>;
};
}
template<typename> struct TreeAllRTLPathsImpl;
template<typename N, typename... Cs>
struct TreeAllRTLPathsImpl<Tree<N, Cs...>> {
using type = PackCat<Transform<typename TreeAllRTLPathsImpl<Cs>::type, Bind2nd<PackPushFront, N>::template F>...>;
};
template<typename N>
struct TreeAllRTLPathsImpl<Tree<N>> {
using type = Pack<Pack<N>>;
};
template<>
struct TreeAllRTLPathsImpl<Tree<>> {
using type = Pack<>;
};
template<typename T>
using TreeAllRTLPaths = typename TreeAllRTLPathsImpl<T>::type;
}
#endif

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#ifndef TMP_UTILITY_H
#define TMP_UTILITY_H
#include <type_traits>
namespace tmp {
using Size = decltype(sizeof 0);
using Depth = signed long long int;
template<typename T>
using GetType = typename T::type;
namespace detail {
template<Depth V, Depth... Vs>
struct MaxImpl: std::integral_constant<Depth, (V>MaxImpl<Vs...>::value? V:MaxImpl<Vs...>::value)> {};
template<Depth V>
struct MaxImpl<V>: std::integral_constant<decltype(V), V> {};
template<Depth... Vs>
constexpr Depth Max = MaxImpl<Vs...>::value;
}
}
#endif

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#include <catch.hpp>
#define REQUIRE_SAME(T0, T1) REQUIRE(std::is_same<T0, T1>{})

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#include "catch_tmp.h"
#include <debug.h>
using namespace tmp;
#if defined(__clang__)
TEST_CASE("typeName") {
REQUIRE("void" == std::string{typeName<void>()});
REQUIRE("int &" == std::string{typeName<int&>()});
REQUIRE("int *" == std::string{typeName<int*>()});
REQUIRE("const int" == std::string{typeName<int const>()});
REQUIRE("int *const &" == std::string{typeName<int* const&>()});
}
TEST_CASE("strTypes") {
REQUIRE("" == strTypes());
REQUIRE("int" == strTypes<int>());
REQUIRE("int" == strTypes<>(0));
REQUIRE("char, int" == strTypes<char>(0));
}
#elif defined(__GNUC__)
TEST_CASE("typeName") {
REQUIRE("void" == std::string{typeName<void>()});
REQUIRE("int&" == std::string{typeName<int&>()});
REQUIRE("int*" == std::string{typeName<int*>()});
REQUIRE("const int" == std::string{typeName<int const>()});
REQUIRE("int* const&" == std::string{typeName<int* const&>()});
}
TEST_CASE("strTypes") {
REQUIRE("" == strTypes());
REQUIRE("int" == strTypes<int>());
REQUIRE("int" == strTypes<>(0));
REQUIRE("char, int" == strTypes<char>(0));
}
#elif defined(__MSC_VER)
TEST_CASE("typeName") {}
TEST_CASE("strTypes") {}
#endif

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#define CATCH_CONFIG_MAIN
#include <catch.hpp>

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#include "catch_tmp.h"
#include <pack.h>
using namespace tmp;
template<typename...> struct MyPack {};
TEST_CASE("PackHead") {
using P = Pack<void>;
REQUIRE_SAME(void, PackHead<P>);
}
TEST_CASE("PackTrail") {
SECTION("empty trail") {
using P = Pack<void>;
REQUIRE_SAME(Pack<>, PackTrail<P>);
}
SECTION("general case") {
using P = Pack<void, bool, char, int>;
using Expected = Pack<bool, char, int>;
REQUIRE_SAME(Expected, PackTrail<P>);
}
}
TEST_CASE("PackGet") {
using P = Pack<void, bool, char, int>;
using P0 = PackGet<P, 0>;
using P1 = PackGet<P, 1>;
using P2 = PackGet<P, 2>;
using P3 = PackGet<P, 3>;
REQUIRE_SAME(void, P0);
REQUIRE_SAME(bool, P1);
REQUIRE_SAME(char, P2);
REQUIRE_SAME(int, P3);
}
TEST_CASE("PackPushFront") {
SECTION("empty pack") {
using Result = PackPushFront<Pack<>, void>;
REQUIRE_SAME(Pack<void>, Result);
}
SECTION("general case") {
using Input = Pack<bool, char>;
using Result = PackPushFront<Input, void>;
using Expected = Pack<void, bool, char>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("PackPushBack") {
SECTION("empty pack") {
using Result = PackPushBack<Pack<>, void>;
REQUIRE_SAME(Pack<void>, Result);
}
SECTION("general case") {
using Input = Pack<bool, char>;
using Result = PackPushBack<Input, void>;
using Expected = Pack<bool, char, void>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("PackCat") {
SECTION("empty input") {
using Result = PackCat<Pack<>, Pack<>>;
REQUIRE_SAME(Pack<>, Result);
}
SECTION("empty lhs") {
using Result = PackCat<Pack<>, Pack<void>>;
REQUIRE_SAME(Pack<void>, Result);
}
SECTION("empty rhs") {
using Result = PackCat<Pack<void>, Pack<>>;
REQUIRE_SAME(Pack<void>, Result);
}
SECTION("general case") {
using Result = PackCat<Pack<void, char>, Pack<int, int, int>>;
using Expected = Pack<void, char, int, int, int>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("PackReverse") {
SECTION("empty input") {
using Result = PackReverse<Pack<>>;
REQUIRE_SAME(Pack<>, Result);
}
SECTION("one element") {
using Result = PackReverse<Pack<void>>;
REQUIRE_SAME(Pack<void>, Result);
}
SECTION("general case") {
using Result = PackReverse<Pack<void, char, int, int, int>>;
using Expected = Pack<int, int, int, char, void>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("PackReplace") {
SECTION("empty pack") {
using Result = PackReplace<Pack<>, void, bool>;
REQUIRE_SAME(Pack<>, Result);
}
SECTION("general case") {
using Input = Pack<void, bool, char, void, char, void>;
using Result = PackReplace<Input, void, bool>;
using Expected = Pack<bool, bool, char, bool, char, bool>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("Repack") {
SECTION("empty pack") {
using Result = Repack<MyPack, Pack<>>;
REQUIRE_SAME(MyPack<>, Result);
}
SECTION("general case") {
using Input = Pack<void, void, void>;
using Result = Repack<MyPack, Input>;
using Expected = MyPack<void, void, void>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("AsPack") {
SECTION("empty pack") {
using Result = Repack<Pack, MyPack<>>;
REQUIRE_SAME(Pack<>, Result);
}
SECTION("general case") {
using Input = MyPack<void, void, void>;
using Result = Repack<Pack, Input>;
using Expected = Pack<void, void, void>;
REQUIRE_SAME(Expected, Result);
}
}

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#include "catch_tmp.h"
#include <algorithm.h>
using namespace tmp;
namespace {
template<unsigned N = 0> struct UInt { static constexpr unsigned value = N; };
template<typename T> struct IdentityImpl { using type = T; };
template<typename T> using Identity = typename IdentityImpl<T>::type;
template<typename> struct UnpackImpl;
template<typename T> struct UnpackImpl<Pack<T>> { using type = T; };
template<typename T> using Unpack = typename UnpackImpl<T>::type;
template<typename T> struct SizeofImpl { using type = UInt<sizeof(T)>; };
template<typename T> using Sizeof = typename SizeofImpl<T>::type;
template<typename P0, typename P1> using Merge = PackCat<P0, P1>;
template<typename U0, typename U1> struct USumImpl { using type = UInt<U0::value+U1::value>; };
template<typename U0, typename U1> using USum = typename USumImpl<U0, U1>::type;
template<typename T> struct IsEven: std::integral_constant<bool, not(T::value & 1)> {};
}
TEST_CASE("Transform") {
SECTION("empty input") {
using Result = Transform<Pack<>, Identity>;
REQUIRE_SAME(Pack<>, Result);
}
using Input0 = Pack<Pack<char>, Pack<float>, Pack<int>>;
using Input1 = Pack<bool, char, short, int, long, long long>;
SECTION("Identity") {
REQUIRE(std::is_same<Input0, Transform<Input0, Identity>>{});
REQUIRE(std::is_same<Input1, Transform<Input1, Identity>>{});
}
SECTION("Unpack") {
using Expected = Pack<char, float, int>;
using Result = Transform<Input0, Unpack>;
REQUIRE_SAME(Expected, Result);
}
SECTION("Sizeof") {
using Expected = Pack<UInt<sizeof(bool)>, UInt<sizeof(char)>, UInt<sizeof(short)>, UInt<sizeof(int)>, UInt<sizeof(long)>, UInt<sizeof(long long)>>;
using Result = Transform<Input1, Sizeof>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("Accumulate") {
SECTION("empty input") {
using Result = Accumulate<Pack<>, PackCat, void>;
REQUIRE_SAME(void, Result);
}
using Input0 = Pack<Pack<char>, Pack<float>, Pack<int>>;
using Input1 = Pack<bool, char, short, int, long, long long>;
SECTION("PackCat") {
using Expected = Pack<char, float, int>;
using Result = Accumulate<Input0, PackCat, Pack<>>;
REQUIRE_SAME(Expected, Result);
}
SECTION("USum") {
using Expected = UInt<sizeof(bool)+sizeof(char)+sizeof(short)+sizeof(int)+sizeof(long)+sizeof(long long)>;
using Result = Accumulate<Transform<Input1, Sizeof>, USum, UInt<>>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("Filter") {
SECTION("empty input") {
using Expected = Pack<>;
using Result = Filter<Pack<>, IsEven>;
REQUIRE_SAME(Expected, Result);
}
SECTION("empty output") {
using Input = Pack<UInt<1>, UInt<3>, UInt<3>, UInt<5>, UInt<5>, UInt<7>>;
using Expected = Pack<>;
using Result = Filter<Input, IsEven>;
REQUIRE_SAME(Expected, Result);
}
SECTION("general case") {
using Input = Pack<UInt<1>, UInt<2>, UInt<3>, UInt<4>, UInt<5>, UInt<6>>;
using Expected = Pack<UInt<2>, UInt<4>, UInt<6>>;
using Result = Filter<Input, IsEven>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("Cut") {
SECTION("empty input") {
using Expected = Pack<Pack<>, Pack<>>;
using Result = Cut<Pack<>, IsEven>;
REQUIRE_SAME(Expected, Result);
}
SECTION("empty left output") {
using Input = Pack<UInt<1>, UInt<3>, UInt<3>, UInt<5>, UInt<5>, UInt<7>>;
using Expected = Pack<Pack<>, Input>;
using Result = Cut<Input, IsEven>;
REQUIRE_SAME(Expected, Result);
}
SECTION("empty right output") {
using Input = Pack<UInt<2>, UInt<4>, UInt<4>, UInt<6>, UInt<6>, UInt<8>>;
using Expected = Pack<Input, Pack<>>;
using Result = Cut<Input, IsEven>;
REQUIRE_SAME(Expected, Result);
}
SECTION("general case") {
using Input = Pack<UInt<2>, UInt<2>, UInt<3>, UInt<3>, UInt<5>, UInt<7>>;
using Expected = Pack<Pack<UInt<2>, UInt<2>>, Pack<UInt<3>, UInt<3>, UInt<5>, UInt<7>>>;
using Result = Cut<Input, IsEven>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("Reverse") {
SECTION("empty input") {
REQUIRE_SAME(Pack<>, Reverse<Pack<>>);
}
SECTION("one element") {
REQUIRE_SAME(Pack<void>, Reverse<Pack<void>>);
}
SECTION("general case") {
using Input = Pack<bool, char, short, int, long>;
using Expected = Pack<long, int, short, char, bool>;
using Result = Reverse<Input>;
REQUIRE_SAME(Expected, Result);
}
}

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#include "catch_tmp.h"
#include <traits.h>
using namespace tmp;
TEST_CASE("void_t") {}
TEST_CASE("Void") {}
TEST_CASE("ReturnType") {
REQUIRE_SAME(void, ReturnType<void()>);
REQUIRE_SAME(void, ReturnType<void(int)>);
REQUIRE_SAME(bool, ReturnType<bool()>);
REQUIRE_SAME(bool&, ReturnType<bool&()>);
REQUIRE_SAME(bool const&, ReturnType<bool const&()>);
REQUIRE_SAME(void*, ReturnType<void*()>);
REQUIRE_SAME(void const*, ReturnType<void const*()>);
REQUIRE_SAME(void const*&, ReturnType<void const*&()>);
REQUIRE_SAME(void const* const&, ReturnType<void const* const&()>);
}
TEST_CASE("Parameters") {
REQUIRE_SAME(Pack<>, Parameters<void()>);
SECTION("single parameter") {
REQUIRE_SAME(Pack<int>, Parameters<void(int)>);
REQUIRE_SAME(Pack<int>, Parameters<void(int const)>);
REQUIRE_SAME(Pack<int&>, Parameters<void(int&)>);
REQUIRE_SAME(Pack<int const&>, Parameters<void(int const&)>);
REQUIRE_SAME(Pack<int*>, Parameters<void(int*)>);
REQUIRE_SAME(Pack<int const*>, Parameters<void(int const*)>);
}
SECTION("multiple parameters") {
using Input = void(void*, char, bool, int);
using Result = Parameters<Input>;
using Expected = Pack<void*, char, bool, int>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("invoke_result_t") {}
TEST_CASE("FunctionCat") {
SECTION("empty lhs and rhs") {
using Result = FunctionCat<void(), void()>;
using Expected = void();
REQUIRE_SAME(Expected, Result);
}
SECTION("empty lhs") {
using Result = FunctionCat<void(), void(char)>;
using Expected = void(char);
REQUIRE_SAME(Expected, Result);
}
SECTION("empty rhs") {
using Result = FunctionCat<void(char), void()>;
using Expected = void(char);
REQUIRE_SAME(Expected, Result);
}
SECTION("general case") {
using Result = FunctionCat<void(char, int), void(bool, char)>;
using Expected = void(char, int, bool, char);
REQUIRE_SAME(Expected, Result);
}
}

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#include "catch_tmp.h"
#include <tree.h>
using namespace tmp;
struct A {};
struct B {};
struct C {};
struct D {};
struct E {};
struct F {};
struct G {};
struct H {};
struct I {};
using T0 = Tree<>;
using T1 = Tree<A>;
using T2 = Tree<A, Tree<B>, Tree<C>>;
using T3 = Tree<A, Tree<B, Tree<C>, Tree<D>, Tree<E>>, Tree<F, Tree<G>>>;
using T4 = Tree<A,
Tree<B, Tree<C, Tree<D>, Tree<E>>>,
Tree<F, Tree<G, Tree<H>>>,
Tree<I>
>;
TEST_CASE("NLR") {
using P0 = Pack<>;
using P1 = Pack<TreeRoot<A, TreeNodeType::Leaf>>;
using P2 = Pack<TreeRoot<A>, TreeLeaf<1, B>, TreeLeaf<1, C>>;
using P3 = Pack<
TreeRoot<A>,
TreeBranch<1, B>, TreeLeaf<2, C>, TreeLeaf<2, D>, TreeLeaf<2, E>,
TreeBranch<1, F>, TreeLeaf<2, G>
>;
using P4 = Pack<
TreeRoot<A>,
TreeBranch<1, B>, TreeBranch<2, C>, TreeLeaf<3, D>, TreeLeaf<3, E>,
TreeBranch<1, F>, TreeBranch<2, G>, TreeLeaf<3, H>,
TreeLeaf<1, I>
>;
SECTION("PackFromTree") {
REQUIRE_SAME(P0, PackFromTreeNLR<T0>);
REQUIRE_SAME(P1, PackFromTreeNLR<T1>);
REQUIRE_SAME(P2, PackFromTreeNLR<T2>);
REQUIRE_SAME(P3, PackFromTreeNLR<T3>);
REQUIRE_SAME(P4, PackFromTreeNLR<T4>);
}
SECTION("TreeFromPack") {
REQUIRE_SAME(T0, TreeFromPackNLR<P0>);
REQUIRE_SAME(T1, TreeFromPackNLR<P1>);
REQUIRE_SAME(T2, TreeFromPackNLR<P2>);
REQUIRE_SAME(T3, TreeFromPackNLR<P3>);
REQUIRE_SAME(T4, TreeFromPackNLR<P4>);
}
}

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#include "catch_tmp.h"
#include <treealgo.h>
using namespace tmp;
namespace {
template<typename T> struct IdentityImpl { using type = T; };
template<typename T> using Identity = typename IdentityImpl<T>::type;
template<typename> struct UnpackImpl;
template<typename T> struct UnpackImpl<Pack<T>> { using type = T; };
template<typename T> using Unpack = typename UnpackImpl<T>::type;
template<unsigned...> struct Unsigneds;
template<typename, typename> struct MakeSizeListImpl;
template<unsigned... Us, typename T> struct MakeSizeListImpl<Unsigneds<Us...>, T> { using type = Unsigneds<Us..., sizeof(T)>; };
template<typename U, typename T> using MakeSizeList = typename MakeSizeListImpl<U, T>::type;
template<typename, typename... Ts>
using CalcHeight = std::integral_constant<Depth, 1 + detail::Max<Ts::type::value...>>;
struct A {};
struct B {};
struct C {};
struct D {};
struct E {};
struct F {};
struct G {};
struct H {};
struct I {};
using T0 = Tree<>;
using T1 = Tree<A>;
using T2 = Tree<A, Tree<B>, Tree<C>>;
using T3 = Tree<A, Tree<B, Tree<C>, Tree<D>, Tree<E>>, Tree<F, Tree<G>>>;
using T4 = Tree<A,
Tree<B, Tree<C, Tree<D>, Tree<E>>>,
Tree<F, Tree<G, Tree<H>>>,
Tree<I>
>;
}
TEST_CASE("TreeTransform") {
SECTION("empty input") {
using Result = TreeTransform<Tree<>, Identity>;
REQUIRE_SAME(Tree<>, Result);
}
using Input1 = Tree<Pack<char>>;
using Input2 = Tree<Pack<bool>, Tree<Pack<char>, Tree<Pack<int>>>, Tree<Pack<long>>>;
SECTION("Identity") {
REQUIRE(std::is_same<Input1, TreeTransform<Input1, Identity>>{});
REQUIRE(std::is_same<Input2, TreeTransform<Input2, Identity>>{});
}
SECTION("Unpack") {
using Expected = Tree<bool, Tree<char, Tree<int>>, Tree<long>>;
using Result = TreeTransform<Input2, Unpack>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("TreeAccumulate") {
using Default = std::integral_constant<Depth, -1>;
SECTION("empty input") {
using Result = TreeAccumulate<Tree<>, CalcHeight, Default>;
REQUIRE_SAME(Default, Result);
}
SECTION("Unpack") {
REQUIRE(0 == TreeAccumulate<T1, CalcHeight, Default>::value);
REQUIRE(1 == TreeAccumulate<T2, CalcHeight, Default>::value);
REQUIRE(1 == TreeAccumulate<Tree<Tree<T1>, T1, T1>, CalcHeight, Default>::value);
REQUIRE(2 == TreeAccumulate<T3, CalcHeight, Default>::value);
}
}
TEST_CASE("TreeNLRAccumulate") {
SECTION("empty input") {
using Result = TreeNLRAccumulate<Tree<>, MakeSizeList, void>;
REQUIRE_SAME(void, Result);
}
SECTION("MakeSizeList") {
using Input = Tree<char, Tree<int, Tree<long long>>, Tree<float>, Tree<double>>;
using Expected = Unsigneds<sizeof(char), sizeof(int), sizeof(long long), sizeof(float), sizeof(double)>;
using Result = TreeNLRAccumulate<Input, MakeSizeList, Unsigneds<>>;
REQUIRE_SAME(Expected, Result);
}
}
TEST_CASE("TreeHeight") {
REQUIRE(-1 == TreeHeight<T0>);
REQUIRE(0 == TreeHeight<T1>);
REQUIRE(1 == TreeHeight<T2>);
REQUIRE(1 == TreeHeight<Tree<Tree<T1>, T1, T1>>);
REQUIRE(2 == TreeHeight<T3>);
}
TEST_CASE("TreeAllRTLPaths") {
SECTION("empty input") {
using Result = TreeAllRTLPaths<T0>;
REQUIRE_SAME(Pack<>, Result);
}
SECTION("only root") {
using Expected = Pack<Pack<A>>;
using Result = TreeAllRTLPaths<T1>;
REQUIRE_SAME(Expected, Result);
}
SECTION("general case") {
using Expected = Pack<Pack<A,B,C,D>, Pack<A,B,C,E>, Pack<A,F,G,H>, Pack<A,I>>;
using Result = TreeAllRTLPaths<T4>;
REQUIRE_SAME(Expected, Result);
}
}