Keep cxx.h up to date

Bug: 528225104
Change-Id: I0fb75053057ac7b01d4973b5f49379166a6a6964
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/23880
Reviewed-by: Takuto Ikuta <tikuta@google.com>
Commit-Queue: Matt Stark <msta@google.com>

src/gn/ffi/update_bridge.sh

diff --git a/src/gn/ffi/update_bridge.sh b/src/gn/ffi/update_bridge.sh
index 818fd10..181f947 100755
--- a/src/gn/ffi/update_bridge.sh
+++ b/src/gn/ffi/update_bridge.sh
@@ -28,6 +28,12 @@
 
 (
   echo "// This file is generated by src/gn/ffi/update_bridge.sh. Do not edit manually."
+  echo "// Source: cxxbridge --header"
+  "${LOCAL_BIN_DIR}/bin/cxxbridge" --header
+) > "${SCRIPT_DIR}/../starlark/vendor/cxx/include/cxx.h"
+
+(
+  echo "// This file is generated by src/gn/ffi/update_bridge.sh. Do not edit manually."
   echo "// Source: src/gn/ffi/starlark/crates/ffi/src/bridge.rs"
   "${LOCAL_BIN_DIR}/bin/cxxbridge" "${SCRIPT_DIR}/../starlark/crates/ffi/src/bridge.rs" --header
 ) > "${SCRIPT_DIR}/bridge.h"

src/gn/starlark/vendor/cxx/include/cxx.h

diff --git a/src/gn/starlark/vendor/cxx/include/cxx.h b/src/gn/starlark/vendor/cxx/include/cxx.h
index 1c97580..7e07004 100644
--- a/src/gn/starlark/vendor/cxx/include/cxx.h
+++ b/src/gn/starlark/vendor/cxx/include/cxx.h
@@ -1,3 +1,5 @@
+// This file is generated by src/gn/ffi/update_bridge.sh. Do not edit manually.
+// Source: cxxbridge --header
 #pragma once
 #include <algorithm>
 #include <array>
@@ -168,6 +170,13 @@
 
   std::array<std::uintptr_t, 2> repr;
 };
+
+#if __cplusplus >= 201703L
+inline Str cxx_to_rust(std::string_view view) { return Str(view); }
+#endif
+
+inline Str cxx_to_rust(const std::string &s) { return Str(s); }
+
 #endif // CXXBRIDGE1_RUST_STR
 
 #ifndef CXXBRIDGE1_RUST_SLICE
@@ -528,7 +537,7 @@
 #ifndef CXXBRIDGE1_PANIC
 #define CXXBRIDGE1_PANIC
 template <typename Exception>
-void panic [[noreturn]] (const char *msg);
+void panic [[noreturn]](const char *msg);
 #endif // CXXBRIDGE1_PANIC
 
 #ifndef CXXBRIDGE1_RUST_FN