[clang] [clang-tools-extra] [llvm] [clang] Introduce diagnostics suppression mappings (PR #112517)
Boaz Brickner via cfe-commits
cfe-commits at lists.llvm.org
Fri Oct 25 06:36:10 PDT 2024
================
@@ -477,6 +485,100 @@ void DiagnosticsEngine::setSeverityForAll(diag::Flavor Flavor,
setSeverity(Diag, Map, Loc);
}
+namespace {
+class WarningsSpecialCaseList : public llvm::SpecialCaseList {
+public:
+ static std::unique_ptr<WarningsSpecialCaseList>
+ create(const llvm::MemoryBuffer &MB, std::string &Err) {
+ auto SCL = std::make_unique<WarningsSpecialCaseList>();
+ if (SCL->createInternal(&MB, Err))
+ return SCL;
+ return nullptr;
+ }
+
+ // Section names refer to diagnostic groups, which cover multiple individual
+ // diagnostics. Expand diagnostic groups here to individual diagnostics.
+ // A diagnostic can have multiple diagnostic groups associated with it, we let
+ // the last section take precedence in such cases.
+ void processSections(DiagnosticsEngine &Diags) {
+ // Drop the default section introduced by special case list, we only support
+ // exact diagnostic group names.
+ Sections.erase("*");
+ // Make sure we iterate sections by their line numbers.
+ std::vector<std::pair<unsigned, const llvm::StringMapEntry<Section> *>>
+ LineAndSection;
+ for (const auto &Entry : Sections) {
+ LineAndSection.emplace_back(
+ Entry.second.SectionMatcher->Globs.at(Entry.first()).second, &Entry);
+ }
+ llvm::sort(LineAndSection);
+ static constexpr auto kFlavor = clang::diag::Flavor::WarningOrError;
+ for (const auto &[_, Entry] : LineAndSection) {
+ SmallVector<diag::kind, 256> GroupDiags;
+ if (Diags.getDiagnosticIDs()->getDiagnosticsInGroup(
+ kFlavor, Entry->first(), GroupDiags)) {
+ StringRef Suggestion =
+ DiagnosticIDs::getNearestOption(kFlavor, Entry->first());
+ Diags.Report(diag::warn_unknown_diag_option)
+ << static_cast<unsigned>(kFlavor) << Entry->first()
+ << !Suggestion.empty() << Suggestion;
+ continue;
+ }
+ for (auto D : GroupDiags)
----------------
bricknerb wrote:
Replacing auto with diag::kind seems more readable to me.
https://github.com/llvm/llvm-project/pull/112517
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