Fixed two major bugs in paxos.cc.

[invirt/third/libt4.git] / types.h

diff --git a/types.h b/types.h
index 9739a2a..0897649 100644 (file)
--- a/types.h
+++ b/types.h
@@ -48,8 +48,7 @@ using std::setfill;
 using std::setprecision;
 using std::ostream;
 using std::istream;
-using std::ostream_iterator;
-using std::istream_iterator;
+using std::ios;
 
 #include <limits>
 using std::numeric_limits;
@@ -77,6 +76,11 @@ using std::stoi;
 
 #include <thread>
 using std::thread;
+using std::call_once;
+using std::once_flag;
+namespace this_thread {
+    using namespace std::this_thread;
+}
 
 #include <tuple>
 using std::tuple;
@@ -92,22 +96,114 @@ using std::is_member_function_pointer;
 using std::is_same;
 using std::underlying_type;
 using std::enable_if;
+using std::remove_reference;
+using std::add_const;
 
 #include <utility>
 using std::pair;
 using std::declval;
+using std::forward;
 
 #include <vector>
 using std::vector;
 
+// type traits and manipulators
 
-template <class A, typename I=void> struct is_iterable : false_type {};
+template <class A, typename I=void> struct is_const_iterable : false_type {};
 
-template<class A> struct is_iterable<A,
+template<class A> struct is_const_iterable<A,
     decltype(declval<A&>().cbegin(), declval<A&>().cend(), void())
 > : true_type {};
 
+template <class A, typename I=void> struct supports_emplace_back : false_type {};
+
+template<class A> struct supports_emplace_back<A,
+    decltype(declval<A&>().emplace_back(declval<typename A::value_type>()), void())
+> : true_type {};
+
+template<typename E>
+using enum_type_t = typename enable_if<is_enum<E>::value, typename underlying_type<E>::type>::type;
+template<typename E> constexpr inline enum_type_t<E> from_enum(E e) noexcept { return (enum_type_t<E>)e; }
+template<typename E> constexpr inline E to_enum(enum_type_t<E> value) noexcept { return (E)value; }
+
+// string manipulation
+
+template <class C>
+inline typename enable_if<is_const_iterable<C>::value, string>::type
+implode(const C & v, string delim=" ") {
+    auto i=v.cbegin(), end=v.cend();
+    if (i == end)
+        return string();
+    ostringstream oss;
+    oss << *i++;
+    while (i != end)
+        oss << delim << *i++;
+    return oss.str();
+}
+
+inline vector<string> explode(const string &s, string delim=" ") {
+    vector<string> out;
+    size_t start = 0, end = 0;
+    while ((end = s.find(delim, start)) != string::npos) {
+        out.push_back(s.substr(start, end - start));
+        start = end + delim.size();
+    }
+    out.push_back(s.substr(start));
+    return out;
+}
+
 #include "lang/verify.h"
 #include "threaded_log.h"
 
+// struct tuple adapter, useful for marshalling
+// used like
+// struct foo {
+//     int a, b;
+//     MEMBERS(a, b)
+// };
+
+#define MEMBERS(...) \
+inline auto _tuple_() -> decltype(tie(__VA_ARGS__)) { return tie(__VA_ARGS__); } \
+inline auto _tuple_() const -> decltype(tie(__VA_ARGS__)) { return tie(__VA_ARGS__); }
+
+// struct ordering and comparison
+// used like
+// struct foo {
+//     int a, b;
+//     MEMBERS(a, b)
+// };
+// LEXICOGRAPHIC_COMPARISON(foo)
+
+#define LEXICOGRAPHIC_OPERATOR(_c_, _op_) \
+inline bool operator _op_(const _c_ &b) const { return _tuple_() _op_ b._tuple_(); }
+
+#define LEXICOGRAPHIC_COMPARISON(_c_) \
+LEXICOGRAPHIC_OPERATOR(_c_, <) LEXICOGRAPHIC_OPERATOR(_c_, <=) \
+LEXICOGRAPHIC_OPERATOR(_c_, >) LEXICOGRAPHIC_OPERATOR(_c_, >=) \
+LEXICOGRAPHIC_OPERATOR(_c_, ==) LEXICOGRAPHIC_OPERATOR(_c_, !=)
+
+// crucial tool for tuple indexing in variadic templates
+//
+// This implementation of tuple_indices is redistributed under the MIT
+// License as an insubstantial portion of the LLVM compiler infrastructure.
+
+template <size_t...> struct tuple_indices {};
+template <size_t S, class IntTuple, size_t E> struct make_indices_imp;
+template <size_t S, size_t... Indices, size_t E> struct make_indices_imp<S, tuple_indices<Indices...>, E> {
+    typedef typename make_indices_imp<S+1, tuple_indices<Indices..., S>, E>::type type;
+};
+template <size_t E, size_t... Indices> struct make_indices_imp<E, tuple_indices<Indices...>, E> {
+    typedef tuple_indices<Indices...> type;
+};
+template <size_t E, size_t S=0> struct make_tuple_indices {
+    typedef typename make_indices_imp<S, tuple_indices<>, E>::type type;
+};
+
+// Template parameter pack expansion is not allowed in certain contexts, but
+// brace initializers (for instance, calls to constructors of empty structs)
+// are fair game.  
+struct pass { template <typename... Args> inline pass(Args&&...) {} };
+
+#include "endian.h"
+
 #endif