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-rw-r--r--absl/types/BUILD.bazel7
-rw-r--r--absl/types/CMakeLists.txt2
-rw-r--r--absl/types/internal/span.h126
-rw-r--r--absl/types/span.h100
4 files changed, 136 insertions, 99 deletions
diff --git a/absl/types/BUILD.bazel b/absl/types/BUILD.bazel
index a62522e4..feac34b1 100644
--- a/absl/types/BUILD.bazel
+++ b/absl/types/BUILD.bazel
@@ -117,7 +117,12 @@ cc_test(
cc_library(
name = "span",
- hdrs = ["span.h"],
+ srcs = [
+ "internal/span.h",
+ ],
+ hdrs = [
+ "span.h",
+ ],
copts = ABSL_DEFAULT_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
deps = [
diff --git a/absl/types/CMakeLists.txt b/absl/types/CMakeLists.txt
index 910c099a..56f9fffd 100644
--- a/absl/types/CMakeLists.txt
+++ b/absl/types/CMakeLists.txt
@@ -114,6 +114,8 @@ absl_cc_library(
span
HDRS
"span.h"
+ SRCS
+ "internal/span.h"
COPTS
${ABSL_DEFAULT_COPTS}
DEPS
diff --git a/absl/types/internal/span.h b/absl/types/internal/span.h
new file mode 100644
index 00000000..d203aad5
--- /dev/null
+++ b/absl/types/internal/span.h
@@ -0,0 +1,126 @@
+//
+// Copyright 2019 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#ifndef ABSL_TYPES_INTERNAL_SPAN_H_
+#define ABSL_TYPES_INTERNAL_SPAN_H_
+
+#include <algorithm>
+#include <cstddef>
+#include <string>
+#include <type_traits>
+
+#include "absl/algorithm/algorithm.h"
+#include "absl/base/internal/throw_delegate.h"
+#include "absl/meta/type_traits.h"
+
+namespace absl {
+
+namespace span_internal {
+// A constexpr min function
+constexpr size_t Min(size_t a, size_t b) noexcept { return a < b ? a : b; }
+
+// Wrappers for access to container data pointers.
+template <typename C>
+constexpr auto GetDataImpl(C& c, char) noexcept // NOLINT(runtime/references)
+ -> decltype(c.data()) {
+ return c.data();
+}
+
+// Before C++17, std::string::data returns a const char* in all cases.
+inline char* GetDataImpl(std::string& s, // NOLINT(runtime/references)
+ int) noexcept {
+ return &s[0];
+}
+
+template <typename C>
+constexpr auto GetData(C& c) noexcept // NOLINT(runtime/references)
+ -> decltype(GetDataImpl(c, 0)) {
+ return GetDataImpl(c, 0);
+}
+
+// Detection idioms for size() and data().
+template <typename C>
+using HasSize =
+ std::is_integral<absl::decay_t<decltype(std::declval<C&>().size())>>;
+
+// We want to enable conversion from vector<T*> to Span<const T* const> but
+// disable conversion from vector<Derived> to Span<Base>. Here we use
+// the fact that U** is convertible to Q* const* if and only if Q is the same
+// type or a more cv-qualified version of U. We also decay the result type of
+// data() to avoid problems with classes which have a member function data()
+// which returns a reference.
+template <typename T, typename C>
+using HasData =
+ std::is_convertible<absl::decay_t<decltype(GetData(std::declval<C&>()))>*,
+ T* const*>;
+
+// Extracts value type from a Container
+template <typename C>
+struct ElementType {
+ using type = typename absl::remove_reference_t<C>::value_type;
+};
+
+template <typename T, size_t N>
+struct ElementType<T (&)[N]> {
+ using type = T;
+};
+
+template <typename C>
+using ElementT = typename ElementType<C>::type;
+
+template <typename T>
+using EnableIfMutable =
+ typename std::enable_if<!std::is_const<T>::value, int>::type;
+
+template <template <typename> class SpanT, typename T>
+bool EqualImpl(SpanT<T> a, SpanT<T> b) {
+ static_assert(std::is_const<T>::value, "");
+ return absl::equal(a.begin(), a.end(), b.begin(), b.end());
+}
+
+template <template <typename> class SpanT, typename T>
+bool LessThanImpl(SpanT<T> a, SpanT<T> b) {
+ // We can't use value_type since that is remove_cv_t<T>, so we go the long way
+ // around.
+ static_assert(std::is_const<T>::value, "");
+ return std::lexicographical_compare(a.begin(), a.end(), b.begin(), b.end());
+}
+
+// The `IsConvertible` classes here are needed because of the
+// `std::is_convertible` bug in libcxx when compiled with GCC. This build
+// configuration is used by Android NDK toolchain. Reference link:
+// https://bugs.llvm.org/show_bug.cgi?id=27538.
+template <typename From, typename To>
+struct IsConvertibleHelper {
+ private:
+ static std::true_type testval(To);
+ static std::false_type testval(...);
+
+ public:
+ using type = decltype(testval(std::declval<From>()));
+};
+
+template <typename From, typename To>
+struct IsConvertible : IsConvertibleHelper<From, To>::type {};
+
+// TODO(zhangxy): replace `IsConvertible` with `std::is_convertible` once the
+// older version of libcxx is not supported.
+template <typename From, typename To>
+using EnableIfConvertibleTo =
+ typename std::enable_if<IsConvertible<From, To>::value>::type;
+} // namespace span_internal
+} // namespace absl
+
+#endif // ABSL_TYPES_INTERNAL_SPAN_H_
diff --git a/absl/types/span.h b/absl/types/span.h
index e5c4fe1e..b007fc1f 100644
--- a/absl/types/span.h
+++ b/absl/types/span.h
@@ -60,114 +60,18 @@
#include <cstddef>
#include <initializer_list>
#include <iterator>
-#include <string>
#include <type_traits>
#include <utility>
-#include "absl/algorithm/algorithm.h"
#include "absl/base/internal/throw_delegate.h"
#include "absl/base/macros.h"
#include "absl/base/optimization.h"
-#include "absl/base/port.h"
+#include "absl/base/port.h" // TODO(strel): remove this include
#include "absl/meta/type_traits.h"
+#include "absl/types/internal/span.h"
namespace absl {
-namespace span_internal {
-// A constexpr min function
-constexpr size_t Min(size_t a, size_t b) noexcept { return a < b ? a : b; }
-
-// Wrappers for access to container data pointers.
-template <typename C>
-constexpr auto GetDataImpl(C& c, char) noexcept // NOLINT(runtime/references)
- -> decltype(c.data()) {
- return c.data();
-}
-
-// Before C++17, std::string::data returns a const char* in all cases.
-inline char* GetDataImpl(std::string& s, // NOLINT(runtime/references)
- int) noexcept {
- return &s[0];
-}
-
-template <typename C>
-constexpr auto GetData(C& c) noexcept // NOLINT(runtime/references)
- -> decltype(GetDataImpl(c, 0)) {
- return GetDataImpl(c, 0);
-}
-
-// Detection idioms for size() and data().
-template <typename C>
-using HasSize =
- std::is_integral<absl::decay_t<decltype(std::declval<C&>().size())>>;
-
-// We want to enable conversion from vector<T*> to Span<const T* const> but
-// disable conversion from vector<Derived> to Span<Base>. Here we use
-// the fact that U** is convertible to Q* const* if and only if Q is the same
-// type or a more cv-qualified version of U. We also decay the result type of
-// data() to avoid problems with classes which have a member function data()
-// which returns a reference.
-template <typename T, typename C>
-using HasData =
- std::is_convertible<absl::decay_t<decltype(GetData(std::declval<C&>()))>*,
- T* const*>;
-
-// Extracts value type from a Container
-template <typename C>
-struct ElementType {
- using type = typename absl::remove_reference_t<C>::value_type;
-};
-
-template <typename T, size_t N>
-struct ElementType<T (&)[N]> {
- using type = T;
-};
-
-template <typename C>
-using ElementT = typename ElementType<C>::type;
-
-template <typename T>
-using EnableIfMutable =
- typename std::enable_if<!std::is_const<T>::value, int>::type;
-
-template <template <typename> class SpanT, typename T>
-bool EqualImpl(SpanT<T> a, SpanT<T> b) {
- static_assert(std::is_const<T>::value, "");
- return absl::equal(a.begin(), a.end(), b.begin(), b.end());
-}
-
-template <template <typename> class SpanT, typename T>
-bool LessThanImpl(SpanT<T> a, SpanT<T> b) {
- // We can't use value_type since that is remove_cv_t<T>, so we go the long way
- // around.
- static_assert(std::is_const<T>::value, "");
- return std::lexicographical_compare(a.begin(), a.end(), b.begin(), b.end());
-}
-
-// The `IsConvertible` classes here are needed because of the
-// `std::is_convertible` bug in libcxx when compiled with GCC. This build
-// configuration is used by Android NDK toolchain. Reference link:
-// https://bugs.llvm.org/show_bug.cgi?id=27538.
-template <typename From, typename To>
-struct IsConvertibleHelper {
- private:
- static std::true_type testval(To);
- static std::false_type testval(...);
-
- public:
- using type = decltype(testval(std::declval<From>()));
-};
-
-template <typename From, typename To>
-struct IsConvertible : IsConvertibleHelper<From, To>::type {};
-
-// TODO(zhangxy): replace `IsConvertible` with `std::is_convertible` once the
-// older version of libcxx is not supported.
-template <typename From, typename To>
-using EnableIfConvertibleTo =
- typename std::enable_if<IsConvertible<From, To>::value>::type;
-} // namespace span_internal
-
//------------------------------------------------------------------------------
// Span
//------------------------------------------------------------------------------
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-07 06:30:51 +0000