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//===- ListWarnings.h - diagtool tool for printing warning flags ----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file provides a diagtool tool that displays warning flags for
// diagnostics.
//
//===----------------------------------------------------------------------===//
#include "DiagTool.h"
#include "DiagnosticNames.h"
#include "clang/Basic/AllDiagnostics.h"
#include "clang/Basic/Diagnostic.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/Support/Format.h"
DEF_DIAGTOOL("list-warnings",
"List warnings and their corresponding flags",
ListWarnings)
using namespace clang;
using namespace diagtool;
namespace {
struct Entry {
llvm::StringRef DiagName;
llvm::StringRef Flag;
Entry(llvm::StringRef diagN, llvm::StringRef flag)
: DiagName(diagN), Flag(flag) {}
bool operator<(const Entry &x) const { return DiagName < x.DiagName; }
};
}
static void printEntries(std::vector<Entry> &entries, llvm::raw_ostream &out) {
for (const Entry &E : entries) {
out << " " << E.DiagName;
if (!E.Flag.empty())
out << " [-W" << E.Flag << "]";
out << '\n';
}
}
int ListWarnings::run(unsigned int argc, char **argv, llvm::raw_ostream &out) {
std::vector<Entry> Flagged, Unflagged;
llvm::StringMap<std::vector<unsigned> > flagHistogram;
for (const DiagnosticRecord &DR : getBuiltinDiagnosticsByName()) {
const unsigned diagID = DR.DiagID;
if (DiagnosticIDs::isBuiltinNote(diagID))
continue;
if (!DiagnosticIDs::isBuiltinWarningOrExtension(diagID))
continue;
Entry entry(DR.getName(), DiagnosticIDs::getWarningOptionForDiag(diagID));
if (entry.Flag.empty())
Unflagged.push_back(entry);
else {
Flagged.push_back(entry);
flagHistogram[entry.Flag].push_back(diagID);
}
}
out << "Warnings with flags (" << Flagged.size() << "):\n";
printEntries(Flagged, out);
out << "Warnings without flags (" << Unflagged.size() << "):\n";
printEntries(Unflagged, out);
out << "\nSTATISTICS:\n\n";
double percentFlagged =
((double)Flagged.size()) / (Flagged.size() + Unflagged.size()) * 100.0;
out << " Percentage of warnings with flags: "
<< llvm::format("%.4g", percentFlagged) << "%\n";
out << " Number of unique flags: "
<< flagHistogram.size() << '\n';
double avgDiagsPerFlag = (double) Flagged.size() / flagHistogram.size();
out << " Average number of diagnostics per flag: "
<< llvm::format("%.4g", avgDiagsPerFlag) << '\n';
out << " Number in -Wpedantic (not covered by other -W flags): "
<< flagHistogram["pedantic"].size() << '\n';
out << '\n';
return 0;
}
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