pw_span: Switch from pw::span to std::span

Replace pw::span with std::span and "pw_span/span.h" with <span>
throughout the codebase.

Change-Id: Ib1fa873168b6093794e861611d750fcad6285d6c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/12801
Commit-Queue: Wyatt Hepler <hepler@google.com>
Reviewed-by: Rob Mohr <mohrr@google.com>
Reviewed-by: Keir Mierle <keir@google.com>

2 files changed, 7 insertions, 7 deletions

diff --git a/pw_sys_io/public/pw_sys_io/sys_io.h b/pw_sys_io/public/pw_sys_io/sys_io.h
index 3010de1ff..5f545b316 100644
--- a/pw_sys_io/public/pw_sys_io/sys_io.h
+++ b/pw_sys_io/public/pw_sys_io/sys_io.h
@@ -37,9 +37,9 @@
 
 #include <cstddef>
 #include <cstring>
+#include <span>
 #include <string_view>
 
-#include "pw_span/span.h"
 #include "pw_status/status.h"
 #include "pw_status/status_with_size.h"
 
@@ -75,7 +75,7 @@ Status WriteByte(std::byte b);
 // are returned as part of the StatusWithSize.
 StatusWithSize WriteLine(const std::string_view& s);
 
-// Fill a byte span from the sys io backend using ReadByte().
+// Fill a byte std::span from the sys io backend using ReadByte().
 // Implemented by: Facade
 //
 // This function is implemented by this facade and simply uses ReadByte() to
@@ -87,9 +87,9 @@ StatusWithSize WriteLine(const std::string_view& s);
 // Return status is Status::OK if the destination span was successfully filled.
 // In all cases, the number of bytes successuflly read to the destination span
 // are returned as part of the StatusWithSize.
-StatusWithSize ReadBytes(span<std::byte> dest);
+StatusWithSize ReadBytes(std::span<std::byte> dest);
 
-// Write span of bytes out the sys io backend using WriteByte().
+// Write std::span of bytes out the sys io backend using WriteByte().
 // Implemented by: Facade
 //
 // This function is implemented by this facade and simply writes the source
@@ -101,6 +101,6 @@ StatusWithSize ReadBytes(span<std::byte> dest);
 // Return status is Status::OK if all the bytes from the source span were
 // successfully written. In all cases, the number of bytes successfully written
 // are returned as part of the StatusWithSize.
-StatusWithSize WriteBytes(span<const std::byte> src);
+StatusWithSize WriteBytes(std::span<const std::byte> src);
 
 }  // namespace pw::sys_io
diff --git a/pw_sys_io/sys_io.cc b/pw_sys_io/sys_io.cc
index ed0ab5c5a..8e013c3b2 100644
--- a/pw_sys_io/sys_io.cc
+++ b/pw_sys_io/sys_io.cc
@@ -16,7 +16,7 @@
 
 namespace pw::sys_io {
 
-StatusWithSize ReadBytes(span<std::byte> dest) {
+StatusWithSize ReadBytes(std::span<std::byte> dest) {
   for (size_t i = 0; i < dest.size_bytes(); ++i) {
     Status result = ReadByte(&dest[i]);
     if (!result.ok()) {
@@ -26,7 +26,7 @@ StatusWithSize ReadBytes(span<std::byte> dest) {
   return StatusWithSize(dest.size_bytes());
 }
 
-StatusWithSize WriteBytes(span<const std::byte> src) {
+StatusWithSize WriteBytes(std::span<const std::byte> src) {
   for (size_t i = 0; i < src.size_bytes(); ++i) {
     Status result = WriteByte(src[i]);
     if (!result.ok()) {