Log: C++ exception support

src/Log.hxx

@@ -23,6 +23,10 @@
 #include "LogLevel.hxx"
 #include "Compiler.h"
 
+namespace std {
+	class exception;
+}
+
 class Error;
 class Domain;
 
@@ -79,6 +83,12 @@ LogError(const Domain &domain, const char *msg)
 	Log(domain, LogLevel::ERROR, msg);
 }
 
+void
+LogError(const std::exception &e);
+
+void
+LogError(const std::exception &e, const char *msg);
+
 gcc_printf(2,3)
 void
 FormatError(const Domain &domain, const char *fmt, ...);