cpplearner
diff --git a/‎source/diagnostics.tex‎
Lines changed: 7 additions & 5 deletions b/‎source/diagnostics.tex‎
Lines changed: 7 additions & 5 deletions
@@ -1046,11 +1046,13 @@
 pointer to the string \tcode{"system"}. The object's \tcode{default_error_condition}
 virtual function shall behave as follows:
 
-If the argument \tcode{ev} corresponds to a POSIX \tcode{errno} value \tcode{posv}, the
-function shall return \tcode{error_condition(posv, generic_category())}.
-Otherwise, the function shall return \tcode{error_condition(ev,
-system_category())}. What constitutes correspondence for any given operating
-system is unspecified.
+If the argument \tcode{ev} is equal to 0,
+the function returns \tcode{error_condition(0, generic_category())}.
+Otherwise,
+if \tcode{ev} corresponds to a POSIX \tcode{errno} value \tcode{pxv},
+the function returns \tcode{error_condition(pxv, generic_category())}.
+Otherwise, the function returns \tcode{error_condition(ev, system_category())}.
+What constitutes correspondence for any given operating system is unspecified.
 \begin{note}
 The number of potential system error codes is large
 and unbounded, and some might not correspond to any POSIX \tcode{errno} value. Thus