Bela Schaum schaumb
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/ is_constant_evaluated.cpp
Last active
May 17, 2023 10:56
>=gcc6.1 and >=c++11 is_constant_evaluated() function implementation with manual memory setting
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| #include <iostream> | |
| #include <type_traits> | |
| namespace { | |
| unsigned char v{}; | |
| constexpr bool is_constant_evaluated(const unsigned char* e = &v) { | |
| return e - 0x6017d2; // memory dependent constant value, check output first line | |
| } | |
| } |
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/ base of template callable traits.cpp
Last active
June 30, 2020 18:40
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| #include <iostream> | |
| #include <tuple> | |
| #include <boost/callable_traits.hpp> | |
| #include <boost/type_index/ctti_type_index.hpp> | |
| #include <boost/preprocessor/seq/for_each.hpp> | |
| #include <boost/preprocessor/variadic/to_seq.hpp> | |
| template<template <typename> typename Base, std::size_t ...Dependents> | |
| struct Depends : Base<Depends<Base, Dependents...>> { |
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/ collection.hpp
Last active
July 23, 2020 16:57
Create a function returnable range collection.
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| #include <boost/utility/base_from_member.hpp> | |
| #include <boost/range/any_range.hpp> | |
| #include <boost/iterator/iterator_traits.hpp> | |
| #include <any> | |
| #include <type_traits> | |
| template<typename T, typename Traversal = boost::forward_traversal_tag> | |
| struct collection : boost::base_from_member<std::any>, | |
| boost::base_from_member<std::function<boost::any_range<T, Traversal>(std::any&)>>, | |
| boost::any_range<T, Traversal> { |
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/ limit_iterator.hpp
Last active
July 28, 2020 21:00
limiting iterator maximum range. output_iterator too
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| #pragma once | |
| #include <boost/iterator/iterator_categories.hpp> | |
| #include <boost/iterator/iterator_adaptor.hpp> | |
| namespace bxlx { | |
| namespace detail { | |
| template<typename Proxy> | |
| struct enable_proxy { | |
| Proxy p; |
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| import streamlit as st | |
| import io | |
| import contextlib | |
| import sys | |
| import re | |
| import threading | |
| class _Redirect: | |
| class IOStuff(io.StringIO): |
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/ bxlx_memory.hpp
Created
April 20, 2022 16:05
make_temporary_for_overwrite, make_function_scoped_for_overwrite
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| #include <type_traits> | |
| #if __has_include(<alloca.h>) | |
| #include <alloca.h> | |
| #else | |
| #define alloca _alloca | |
| #endif | |
| namespace bxlx { |
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| #include <type_traits> | |
| #include <string_view> | |
| #include <iostream> | |
| #include <atomic> | |
| #include <utility> | |
| #include <tuple> | |
| #include <cassert> | |
| template<char... Chars> | |
| struct str { |
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/ long_type_traits.hpp
Created
April 26, 2022 17:11
add_long, remove_long, has_long type traits
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| #include <type_traits> | |
| namespace bxlx { | |
| namespace impl { | |
| template<typename T, typename = void> | |
| struct add_long { | |
| using type = T; | |
| }; | |
| template<> |
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/ lambda_traits.hpp
Created
May 2, 2022 20:19
lambda traits header only lib. min/max arity, has capture, is variadic etc
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| #include <tuple> | |
| #include <limits> | |
| #define BXLX_MAXIMUM_ARG_TEMPLATE_LAMBDA 100 | |
| namespace bxlx { | |
| namespace impl { | |
| template<std::size_t> | |
| struct arg { | |
| using type = arg; |
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/ get_member_name.hpp
Last active
May 14, 2024 18:58
c++ get member name from member pointer
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| // see at godbolt : https://godbolt.org/z/zMGEGs99v | |
| #include <string_view> | |
| template<auto V> | |
| constexpr static auto n() noexcept { | |
| #ifdef _MSC_VER | |
| std::string_view sv = __FUNCSIG__; | |
| auto to = sv.rfind('>')-1; | |
| for (std::size_t close = sv[to] == ')'; close > 0; ) { |
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