Sunil_Srivastava added a comment.
Please see the comment about getAllDiagnostics
================
Comment at: lib/Basic/Diagnostic.cpp:251-257
@@ -250,2 +250,9 @@
SourceLocation Loc) {
+ // Special handling for pragma clang diagnostic ... "-Weverything"
+ // There is no formal group named "everything", so there has to be a special
+ // case for it.
+ if (Group == "everything") {
+ setSeverityForAll(Flavor, Map, Loc);
+ return false;
+ }
// Get the diagnostics in this group.
----------------
rsmith wrote:
> If you want to handle this at the `DiagnosticsEngine` level, please do so
> consistently: teach `getDiagnosticsInGroup` about this special case too, and
> remove the now-redundant code in `clang::ProcessWarningOptions`.
>
> This is not currently setting the `EnableAllWarnings` flag correctly on the
> `DiagnosticsEngine`.
Hi Richard, There is a problem in teaching getDiagnosticsInGroup this special
case.
getDiagnosticsInGroup can get the list from getAllDiagnostics, but that list
will contain disgnostics that can not be downgraded (or those for which
isBuiltinWarningOrExtension() is false).
Back in setSeverityForGroup, it is safe to call setSeverityForAll, because it
checks isBuiltinWarningOrExtension before calling setSeverity, but the loop in
setSeverityForGroup itself does not have this check. So a simplistic
getAllDiagnostics for "everything" leads to an assertion failure "Cannot map
errors into warnings!" in setSeverity.
In fact, ProcessWarningOptions has the same issue because it also calls
setSeverityForGroup.
So the options are:
1) add isBuiltinWarning... test in the loop in setSeverityForGroup, similar to
setSeverityForAll
2) have some variant of getAllDiagnostics that returns a trimmed down list.
Please advise.
The other point about EnableAllWarnings: I agree.
================
Comment at: test/Frontend/Peverything.cpp:1
@@ +1,2 @@
+// RUN: %clang_cc1 %s -fsyntax-only -verify
+#pragma clang diagnostic error "-Weverything"
----------------
rsmith wrote:
> This test belongs in **test/Preprocessor/pragma_diagnostic.c**.
OK. And I will add push pop tests as well
http://reviews.llvm.org/D15095
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