Expose signals Activity::on_suspend and Activity::on_resume in s4u

[simgrid.git] / include / xbt / string.hpp

diff --git a/include/xbt/string.hpp b/include/xbt/string.hpp
index 0a50fb6..a462448 100644 (file)
--- a/include/xbt/string.hpp
+++ b/include/xbt/string.hpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2015-2020. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2015-2022. The SimGrid Team. All rights reserved.          */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
@@ -31,13 +31,13 @@ namespace xbt {
  *
  * @ingroup XBT_str
  */
-XBT_PUBLIC std::string string_printf(const char* fmt, ...);
+XBT_PUBLIC std::string string_printf(const char* fmt, ...) XBT_ATTRIB_PRINTF(1, 2);
 
 /** Create a C++ string from a C-style format
  *
  * @ingroup XBT_str
  */
-XBT_PUBLIC std::string string_vprintf(const char* fmt, va_list ap);
+XBT_PUBLIC std::string string_vprintf(const char* fmt, va_list ap) XBT_ATTRIB_PRINTF(1, 0);
 
 #if SIMGRID_HAVE_MC
 
@@ -145,7 +145,7 @@ public:
   // Capacity
   size_t size() const { return str.len; }
   size_t length() const { return str.len; }
-  bool empty() const { return str.len != 0; }
+  bool empty() const { return str.len == 0; }
   void shrink_to_fit() { /* Being there, but doing nothing */}
 
   // Element access
@@ -174,7 +174,7 @@ public:
     return data()[i];
   }
   // Conversion
-  static string_data& to_string_data(string& s) { return s.str; }
+  static const string_data& to_string_data(const string& s) { return s.str; }
   operator std::string() const { return std::string(this->c_str(), this->size()); }
 
   // Iterators