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Diffstat (limited to 'libbutl/multi-index.mxx')
-rw-r--r-- | libbutl/multi-index.mxx | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/libbutl/multi-index.mxx b/libbutl/multi-index.mxx deleted file mode 100644 index d51bdfc..0000000 --- a/libbutl/multi-index.mxx +++ /dev/null @@ -1,72 +0,0 @@ -// file : libbutl/multi-index.mxx -*- C++ -*- -// license : MIT; see accompanying LICENSE file - -#ifndef __cpp_modules_ts -#pragma once -#endif - -// C includes. - -#ifndef __cpp_lib_modules_ts -#include <utility> // declval() -#include <functional> // hash -#endif - -// Other includes. - -#ifdef __cpp_modules_ts -export module butl.multi_index; -#ifdef __cpp_lib_modules_ts -import std.core; -#endif -#endif - -#include <libbutl/export.hxx> - -LIBBUTL_MODEXPORT namespace butl -{ - // Google the "Emulating Boost.MultiIndex with Standard Containers" blog - // post for details. - // - - template <typename T> - struct map_key - { - mutable const T* p; - - map_key (const T* v = 0): p (v) {} - bool operator< (const map_key& x) const {return *p < *x.p;} - bool operator== (const map_key& x) const {return *p == *x.p;} - }; - - template <typename I> - struct map_iterator_adapter: I - { - typedef const typename I::value_type::second_type value_type; - typedef value_type* pointer; - typedef value_type& reference; - - map_iterator_adapter () {} - map_iterator_adapter (I i): I (i) {} - - map_iterator_adapter& - operator= (I i) {static_cast<I&> (*this) = i; return *this;} - - reference operator* () const {return I::operator* ().second;} - pointer operator-> () const {return &I::operator-> ()->second;} - }; -} - -LIBBUTL_MODEXPORT namespace std -{ - template <typename T> - struct hash<butl::map_key<T>>: hash<T> - { - size_t - operator() (butl::map_key<T> x) const - noexcept (noexcept (declval<hash<T>> () (*x.p))) - { - return hash<T>::operator() (*x.p); - } - }; -} |