SmallString: Add span helpers

src/common/small_string.cpp

@@ -506,6 +506,26 @@ std::wstring SmallStringBase::wstring() const
 
 #endif
 
+std::span<const char> SmallStringBase::cspan() const
+{
+  return std::span<const char>(m_buffer, m_length);
+}
+
+std::span<char> SmallStringBase::span()
+{
+  return std::span<char>(m_buffer, m_length);
+}
+
+std::span<const u8> SmallStringBase::cbspan() const
+{
+  return std::span<const u8>(reinterpret_cast<const u8*>(m_buffer), m_length);
+}
+
+std::span<u8> SmallStringBase::bspan()
+{
+  return std::span<u8>(reinterpret_cast<u8*>(m_buffer), m_length);
+}
+
 void SmallStringBase::vformat(fmt::string_view fmt, fmt::format_args args)
 {
   clear();

src/common/small_string.h

@@ -12,6 +12,7 @@
 #include <cstring>
 #include <iterator>
 #include <limits>
+#include <span>
 #include <string>
 #include <string_view>
 
@@ -207,10 +208,18 @@ class SmallStringBase
   std::wstring wstring() const;
 #endif
 
+  // span creators
+  std::span<const char> cspan() const;
+  std::span<char> span();
+  std::span<const u8> cbspan() const;
+  std::span<u8> bspan();
+
   // accessor operators
   ALWAYS_INLINE operator const char*() const { return c_str(); }
   ALWAYS_INLINE operator char*() { return data(); }
   ALWAYS_INLINE operator std::string_view() const { return view(); }
+  ALWAYS_INLINE operator std::span<const char>() const { return cspan(); }
+  ALWAYS_INLINE operator std::span<char>() { return span(); }
 
   // comparative operators
   ALWAYS_INLINE bool operator==(const char* str) const { return equals(str); }