static DiagnosticMappingInfo GetDefaultDiagMappingInfo(unsigned DiagID) {
DiagnosticMappingInfo Info = DiagnosticMappingInfo::Make(
diag::MAP_FATAL, /*IsUser=*/false, /*IsPragma=*/false);
if (const StaticDiagInfoRec *StaticInfo = GetDiagInfo(DiagID)) {
Info.setMapping((diag::Mapping) StaticInfo->Mapping);
if (StaticInfo->WarnNoWerror) {
assert(Info.getMapping() == diag::MAP_WARNING &&
"Unexpected mapping with no-Werror bit!");
Info.setNoWarningAsError(true);
}
if (StaticInfo->WarnShowInSystemHeader) {
assert(Info.getMapping() == diag::MAP_WARNING &&
"Unexpected mapping with show-in-system-header bit!");
Info.setShowInSystemHeader(true);
}
}
return Info;
}
/// \brief This allows the client to specify that certain
/// warnings are ignored. Notes can never be mapped, errors can only be
/// mapped to fatal, and WARNINGs and EXTENSIONs can be mapped arbitrarily.
///
/// \param The source location that this change of diagnostic state should
/// take affect. It can be null if we are setting the latest state.
void DiagnosticsEngine::setDiagnosticMapping(diag::kind Diag, diag::Mapping Map,
SourceLocation L) {
assert(Diag < diag::DIAG_UPPER_LIMIT &&
"Can only map builtin diagnostics");
assert((Diags->isBuiltinWarningOrExtension(Diag) ||
(Map == diag::MAP_FATAL || Map == diag::MAP_ERROR)) &&
"Cannot map errors into warnings!");
assert(!DiagStatePoints.empty());
bool isPragma = L.isValid();
FullSourceLoc Loc(L, *SourceMgr);
FullSourceLoc LastStateChangePos = DiagStatePoints.back().Loc;
DiagnosticMappingInfo MappingInfo = DiagnosticMappingInfo::Make(
Map, /*IsUser=*/true, isPragma);
// If this is a pragma mapping, then set the diagnostic mapping flags so that
// we override command line options.
if (isPragma) {
MappingInfo.setNoWarningAsError(true);
MappingInfo.setNoErrorAsFatal(true);
}
// Common case; setting all the diagnostics of a group in one place.
if (Loc.isInvalid() || Loc == LastStateChangePos) {
GetCurDiagState()->setMappingInfo(Diag, MappingInfo);
return;
}
// Another common case; modifying diagnostic state in a source location
// after the previous one.
if ((Loc.isValid() && LastStateChangePos.isInvalid()) ||
LastStateChangePos.isBeforeInTranslationUnitThan(Loc)) {
// A diagnostic pragma occurred, create a new DiagState initialized with
// the current one and a new DiagStatePoint to record at which location
// the new state became active.
DiagStates.push_back(*GetCurDiagState());
PushDiagStatePoint(&DiagStates.back(), Loc);
GetCurDiagState()->setMappingInfo(Diag, MappingInfo);
return;
}
// We allow setting the diagnostic state in random source order for
// completeness but it should not be actually happening in normal practice.
DiagStatePointsTy::iterator Pos = GetDiagStatePointForLoc(Loc);
assert(Pos != DiagStatePoints.end());
// Update all diagnostic states that are active after the given location.
for (DiagStatePointsTy::iterator
I = Pos+1, E = DiagStatePoints.end(); I != E; ++I) {
GetCurDiagState()->setMappingInfo(Diag, MappingInfo);
}
// If the location corresponds to an existing point, just update its state.
if (Pos->Loc == Loc) {
GetCurDiagState()->setMappingInfo(Diag, MappingInfo);
return;
}
// Create a new state/point and fit it into the vector of DiagStatePoints
// so that the vector is always ordered according to location.
Pos->Loc.isBeforeInTranslationUnitThan(Loc);
DiagStates.push_back(*Pos->State);
DiagState *NewState = &DiagStates.back();
GetCurDiagState()->setMappingInfo(Diag, MappingInfo);
DiagStatePoints.insert(Pos+1, DiagStatePoint(NewState,
FullSourceLoc(Loc, *SourceMgr)));
}