felipecrv commented on code in PR #38192:
URL: https://github.com/apache/arrow/pull/38192#discussion_r1355070993
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cpp/thirdparty/flatbuffers/README.md:
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@@ -75,48 +117,229 @@ index fccce42f6..a00d5b0fd 100644
#if (!defined(_MSC_VER) || _MSC_VER > 1600) && \
(!defined(__GNUC__) || (__GNUC__ * 100 + __GNUC_MINOR__ >= 407)) || \
-@@ -201,16 +211,20 @@ namespace flatbuffers {
- // Check for std::string_view (in c++17)
- #if __has_include(<string_view>) && (__cplusplus >= 201606 ||
(defined(_HAS_CXX17) && _HAS_CXX17))
- #include <string_view>
-+ namespace arrow_vendored_private {
- namespace flatbuffers {
- typedef std::string_view string_view;
- }
-+ }
- #define FLATBUFFERS_HAS_STRING_VIEW 1
- // Check for std::experimental::string_view (in c++14, compiler-dependent)
- #elif __has_include(<experimental/string_view>) && (__cplusplus >= 201411)
- #include <experimental/string_view>
-+ namespace arrow_vendored_private {
- namespace flatbuffers {
- typedef std::experimental::string_view string_view;
- }
-+ }
- #define FLATBUFFERS_HAS_STRING_VIEW 1
- #endif
- #endif // __has_include
-@@ -278,6 +292,7 @@ template<typename T> FLATBUFFERS_CONSTEXPR inline bool
IsConstTrue(T t) {
+@@ -216,37 +227,13 @@ namespace flatbuffers {
+ #endif
+
+ #ifndef FLATBUFFERS_HAS_STRING_VIEW
+- // Only provide flatbuffers::string_view if __has_include can be used
+- // to detect a header that provides an implementation
+- #if defined(__has_include)
+- // Check for std::string_view (in c++17)
+- #if __has_include(<string_view>) && (__cplusplus >= 201606 ||
(defined(_HAS_CXX17) && _HAS_CXX17))
+- #include <string_view>
+- namespace flatbuffers {
+- typedef std::string_view string_view;
+- }
+- #define FLATBUFFERS_HAS_STRING_VIEW 1
+- // Check for std::experimental::string_view (in c++14, compiler-dependent)
+- #elif __has_include(<experimental/string_view>) && (__cplusplus >= 201411)
+- #include <experimental/string_view>
+- namespace flatbuffers {
+- typedef std::experimental::string_view string_view;
+- }
+- #define FLATBUFFERS_HAS_STRING_VIEW 1
+- // Check for absl::string_view
+- #elif __has_include("absl/strings/string_view.h") && \
+- __has_include("absl/base/config.h") && \
+- (__cplusplus >= 201411)
+- #include "absl/base/config.h"
+- #if !defined(ABSL_USES_STD_STRING_VIEW)
+- #include "absl/strings/string_view.h"
+- namespace flatbuffers {
+- typedef absl::string_view string_view;
+- }
+- #define FLATBUFFERS_HAS_STRING_VIEW 1
+- #endif
+- #endif
+- #endif // __has_include
++ #include <string_view>
Review Comment:
You're right. Since this version doesn't check for `absl::string_view`
first, we don't need it.
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