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authorGravatar Abseil Team <absl-team@google.com>2018-06-26 10:45:35 -0700
committerGravatar Alex Strelnikov <strel@google.com>2018-06-26 13:49:13 -0400
commit7efd8dc0f1075356e9c7caa950afd1ecf854e8b9 (patch)
tree71d6d8052d98170726835a682463876bcb33f51a /absl/strings/internal/str_split_internal.h
parent87a4c07856e7dc69958019d47b2f02ae47746ec0 (diff)
Export of internal Abseil changes.
-- 6bab63b2bcdbd768743c2ebcc4a8e19af20c5406 by Abseil Team <absl-team@google.com>: Reformats inlined_vector.h to match the current Google lint rules PiperOrigin-RevId: 202154101 -- 00cdeda6ea24591a9cb8ac8b3c2e2a042e1b15b1 by Gennadiy Rozental <rogeeff@google.com>: Improve SplitterIsConvertibleTo implementation. PiperOrigin-RevId: 202095009 -- 7c24071afac45a17c47e819896f844a36e239bda by Greg Falcon <gfalcon@google.com>: Internal change PiperOrigin-RevId: 201991288 GitOrigin-RevId: 6bab63b2bcdbd768743c2ebcc4a8e19af20c5406 Change-Id: Ic5a988ab39e78247285411f36287cd34d6f5afd3
Diffstat (limited to 'absl/strings/internal/str_split_internal.h')
-rw-r--r--absl/strings/internal/str_split_internal.h26
1 files changed, 22 insertions, 4 deletions
diff --git a/absl/strings/internal/str_split_internal.h b/absl/strings/internal/str_split_internal.h
index a1b10f3a..9cf0833f 100644
--- a/absl/strings/internal/str_split_internal.h
+++ b/absl/strings/internal/str_split_internal.h
@@ -228,14 +228,31 @@ struct IsInitializerList
// compiled in C++11 will get an error due to ambiguous conversion paths (in
// C++11 std::vector<T>::operator= is overloaded to take either a std::vector<T>
// or an std::initializer_list<T>).
+
+template <typename C, bool has_value_type, bool has_mapped_type>
+struct SplitterIsConvertibleToImpl : std::false_type {};
+
+template <typename C>
+struct SplitterIsConvertibleToImpl<C, true, false>
+ : std::is_constructible<typename C::value_type, absl::string_view> {};
+
+template <typename C>
+struct SplitterIsConvertibleToImpl<C, true, true>
+ : absl::conjunction<
+ std::is_constructible<typename C::key_type, absl::string_view>,
+ std::is_constructible<typename C::mapped_type, absl::string_view>> {};
+
template <typename C>
struct SplitterIsConvertibleTo
- : std::enable_if<
+ : SplitterIsConvertibleToImpl<
+ C,
#ifdef _GLIBCXX_DEBUG
!IsStrictlyBaseOfAndConvertibleToSTLContainer<C>::value &&
#endif // _GLIBCXX_DEBUG
- !IsInitializerList<C>::value && HasValueType<C>::value &&
- HasConstIterator<C>::value> {
+ !IsInitializerList<
+ typename std::remove_reference<C>::type>::value &&
+ HasValueType<C>::value && HasConstIterator<C>::value,
+ HasMappedType<C>::value> {
};
// This class implements the range that is returned by absl::StrSplit(). This
@@ -281,7 +298,8 @@ class Splitter {
// An implicit conversion operator that is restricted to only those containers
// that the splitter is convertible to.
template <typename Container,
- typename OnlyIf = typename SplitterIsConvertibleTo<Container>::type>
+ typename = typename std::enable_if<
+ SplitterIsConvertibleTo<Container>::value>::type>
operator Container() const { // NOLINT(runtime/explicit)
return ConvertToContainer<Container, typename Container::value_type,
HasMappedType<Container>::value>()(*this);