CXX-2367 Apply clangd IWYU export pragmas to transitive includes (#1492)

Author: eramongodb

src/bsoncxx/include/bsoncxx/v1/array/value.hpp

@@ -14,16 +14,17 @@
 
 #pragma once
 
-#include <bsoncxx/v1/array/value-fwd.hpp>
+#include <bsoncxx/v1/array/value-fwd.hpp> // IWYU pragma: export
 
 //
 
 #include <bsoncxx/v1/detail/prelude.hpp>
 
-#include <bsoncxx/v1/array/view.hpp>
-#include <bsoncxx/v1/config/export.hpp>
-#include <bsoncxx/v1/document/value.hpp>
+#include <bsoncxx/v1/array/view.hpp> // IWYU pragma: export
+#include <bsoncxx/v1/detail/type_traits.hpp>
+#include <bsoncxx/v1/document/value.hpp> // IWYU pragma: export
 
+#include <cstddef>
 #include <cstdint>
 #include <type_traits>
 #include <utility>

src/bsoncxx/include/bsoncxx/v1/array/view.hpp

@@ -14,15 +14,15 @@
 
 #pragma once
 
-#include <bsoncxx/v1/array/view-fwd.hpp>
+#include <bsoncxx/v1/array/view-fwd.hpp> // IWYU pragma: export
 
 //
 
 #include <bsoncxx/v1/detail/prelude.hpp>
 
 #include <bsoncxx/v1/config/export.hpp>
-#include <bsoncxx/v1/document/view.hpp>
-#include <bsoncxx/v1/element/view.hpp>
+#include <bsoncxx/v1/document/view.hpp> // IWYU pragma: export
+#include <bsoncxx/v1/element/view.hpp>  // IWYU pragma: export
 
 #include <cstddef>
 #include <cstdint>

src/bsoncxx/include/bsoncxx/v1/decimal128.hpp

@@ -14,7 +14,7 @@
 
 #pragma once
 
-#include <bsoncxx/v1/decimal128-fwd.hpp>
+#include <bsoncxx/v1/decimal128-fwd.hpp> // IWYU pragma: export
 
 //
 
@@ -24,6 +24,7 @@
 #include <bsoncxx/v1/stdx/string_view.hpp>
 
 #include <cstdint>
+#include <string>
 #include <system_error>
 #include <type_traits>
 

src/bsoncxx/include/bsoncxx/v1/detail/bit.hpp

@@ -16,12 +16,12 @@
 
 #include <bsoncxx/v1/detail/prelude.hpp>
 
-#include <bsoncxx/v1/config/config.hpp>
-
 #if defined(__has_include)
 #if __has_include(<bit>) && (!defined(_MSVC_LANG) || _MSVC_LANG >= 202002L)
+
 // Prioritize using std::endian from C++20.
-#include <bit>
+#include <bit> // IWYU pragma: export
+
 #endif // __has_include(<bit>) && (!defined(_MSVC_LANG) || _MSVC_LANG >= 202002L)
 #elif defined(_WIN32)
 // Forward-compatibility with STL: https://github.com/microsoft/STL/blob/vs-2019-16.5/stl/inc/bit#L26

src/bsoncxx/include/bsoncxx/v1/detail/compare.hpp

@@ -20,8 +20,7 @@
 #include <bsoncxx/v1/detail/type_traits.hpp>
 
 #include <cstddef>
-#include <functional>
-#include <type_traits>
+#include <utility>
 
 namespace bsoncxx {
 namespace detail {

src/bsoncxx/include/bsoncxx/v1/detail/type_traits.hpp

@@ -18,7 +18,8 @@
 
 #include <bsoncxx/v1/detail/macros.hpp>
 
-#include <type_traits>
+#include <cstddef>
+#include <type_traits> // IWYU pragma: export
 #include <utility>
 
 namespace bsoncxx {

src/bsoncxx/include/bsoncxx/v1/document/value.hpp

@@ -14,18 +14,20 @@
 
 #pragma once
 
-#include <bsoncxx/v1/document/value-fwd.hpp>
+#include <bsoncxx/v1/document/value-fwd.hpp> // IWYU pragma: export
 
 //
 
 #include <bsoncxx/v1/detail/prelude.hpp>
 
 #include <bsoncxx/v1/config/export.hpp>
 #include <bsoncxx/v1/detail/type_traits.hpp>
-#include <bsoncxx/v1/document/view.hpp>
-#include <bsoncxx/v1/element/view.hpp>
+#include <bsoncxx/v1/document/view.hpp> // IWYU pragma: export
+#include <bsoncxx/v1/element/view.hpp>  // IWYU pragma: export
+#include <bsoncxx/v1/stdx/string_view.hpp>
 
 #include <cstddef>
+#include <cstdint>
 #include <cstring>
 #include <functional>
 #include <memory>

src/bsoncxx/include/bsoncxx/v1/document/view.hpp

@@ -14,15 +14,15 @@
 
 #pragma once
 
-#include <bsoncxx/v1/document/view-fwd.hpp>
+#include <bsoncxx/v1/document/view-fwd.hpp> // IWYU pragma: export
 
 //
 
 #include <bsoncxx/v1/detail/prelude.hpp>
 
 #include <bsoncxx/v1/config/export.hpp>
 #include <bsoncxx/v1/detail/bit.hpp>
-#include <bsoncxx/v1/element/view.hpp>
+#include <bsoncxx/v1/element/view.hpp> // IWYU pragma: export
 #include <bsoncxx/v1/stdx/string_view.hpp>
 
 #include <cstddef>

src/bsoncxx/include/bsoncxx/v1/element/view.hpp

@@ -14,7 +14,7 @@
 
 #pragma once
 
-#include <bsoncxx/v1/element/view-fwd.hpp>
+#include <bsoncxx/v1/element/view-fwd.hpp> // IWYU pragma: export
 
 //
 

src/bsoncxx/include/bsoncxx/v1/exception.hpp

@@ -14,7 +14,7 @@
 
 #pragma once
 
-#include <bsoncxx/v1/exception-fwd.hpp>
+#include <bsoncxx/v1/exception-fwd.hpp> // IWYU pragma: export
 
 //