Add informational log output to simple_file_parser

include/cppast/diagnostic.hpp

@@ -86,6 +86,7 @@ namespace cppast
     enum class severity
     {
         debug,    //< A debug diagnostic that is just for debugging purposes.
+        info,     //< An informational message.
         warning,  //< A warning that doesn't impact AST generation.
         error,    //< A non-critical error that does impact AST generation but not critically.
         critical, //< A critical error where AST generation isn't possible.
@@ -99,6 +100,8 @@ namespace cppast
         {
         case severity::debug:
             return "debug";
+        case severity::info:
+            return "info";
         case severity::warning:
             return "warning";
         case severity::error:

include/cppast/parser.hpp

@@ -11,6 +11,7 @@
 #include <cppast/cpp_file.hpp>
 #include <cppast/cpp_preprocessor.hpp>
 #include <cppast/diagnostic_logger.hpp>
+#include <cppast/diagnostic.hpp>
 
 namespace cppast
 {
@@ -54,6 +55,12 @@ namespace cppast
             error_ = false;
         }
 
+        /// \returns A reference to the logger used.
+        const diagnostic_logger& logger() const noexcept
+        {
+            return *logger_;
+        }
+
     protected:
         /// \effects Creates it giving it a reference to the logger it uses.
         explicit parser(type_safe::object_ref<const diagnostic_logger> logger)
@@ -61,12 +68,6 @@ namespace cppast
         {
         }
 
-        /// \returns A reference to the logger used.
-        const diagnostic_logger& logger() const noexcept
-        {
-            return *logger_;
-        }
-
         /// \effects Sets the error state.
         /// This must be called when an error or critical diagnostic is logged and the AST is incomplete.
         void set_error() const noexcept
@@ -111,6 +112,9 @@ namespace cppast
         /// \returns The parsed file or an empty optional, if a fatal error occurred.
         type_safe::optional_ref<const cpp_file> parse(std::string path, const config& c)
         {
+            parser_.logger().log("simple file parser",
+                                 diagnostic{"parsing file '" + path + "'", source_location(),
+                                            severity::info});
             auto file = parser_.parse(*idx_, std::move(path), c);
             auto ptr  = file.get();
             if (file)