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//===--- QueryCheck.cpp - clang-tidy --------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "QueryCheck.h"
#include "../../clang-query/Query.h"
#include "../../clang-query/QueryParser.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/ASTMatchers/Dynamic/VariantValue.h"
#include "clang/Basic/DiagnosticIDs.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include <string>
using namespace clang::ast_matchers;
namespace clang::tidy::custom {
static void emitConfigurationDiag(ClangTidyContext *Context, StringRef Message,
StringRef CheckName) {
Context->configurationDiag("%0 in '%1'", DiagnosticIDs::Warning)
<< Message << CheckName;
}
static SmallVector<ast_matchers::dynamic::DynTypedMatcher>
parseQuery(const ClangTidyOptions::CustomCheckValue &V,
ClangTidyContext *Context) {
SmallVector<ast_matchers::dynamic::DynTypedMatcher> Matchers{};
clang::query::QuerySession QS({});
llvm::StringRef QueryStringRef{V.Query};
while (!QueryStringRef.empty()) {
query::QueryRef Q = query::QueryParser::parse(QueryStringRef, QS);
switch (Q->Kind) {
case query::QK_Match: {
const auto &MatchQuery = llvm::cast<query::MatchQuery>(*Q);
Matchers.push_back(MatchQuery.Matcher);
break;
}
case query::QK_Let: {
const auto &LetQuery = llvm::cast<query::LetQuery>(*Q);
LetQuery.run(llvm::errs(), QS);
break;
}
case query::QK_NoOp: {
const auto &NoOpQuery = llvm::cast<query::NoOpQuery>(*Q);
NoOpQuery.run(llvm::errs(), QS);
break;
}
case query::QK_Invalid: {
const auto &InvalidQuery = llvm::cast<query::InvalidQuery>(*Q);
emitConfigurationDiag(Context, InvalidQuery.ErrStr, V.Name);
return {};
}
// FIXME: TODO
case query::QK_File: {
emitConfigurationDiag(Context, "unsupported query kind 'File'", V.Name);
return {};
}
case query::QK_DisableOutputKind: {
emitConfigurationDiag(
Context, "unsupported query kind 'DisableOutputKind'", V.Name);
return {};
}
case query::QK_EnableOutputKind: {
emitConfigurationDiag(
Context, "unsupported query kind 'EnableOutputKind'", V.Name);
return {};
}
case query::QK_SetOutputKind: {
emitConfigurationDiag(Context, "unsupported query kind 'SetOutputKind'",
V.Name);
return {};
}
case query::QK_SetTraversalKind: {
emitConfigurationDiag(
Context, "unsupported query kind 'SetTraversalKind'", V.Name);
return {};
}
case query::QK_SetBool: {
emitConfigurationDiag(Context, "unsupported query kind 'SetBool'",
V.Name);
return {};
}
case query::QK_Help: {
emitConfigurationDiag(Context, "unsupported query kind 'Help'", V.Name);
return {};
}
case query::QK_Quit: {
emitConfigurationDiag(Context, "unsupported query kind 'Quit'", V.Name);
return {};
}
}
QueryStringRef = Q->RemainingContent;
}
return Matchers;
}
QueryCheck::QueryCheck(llvm::StringRef Name,
const ClangTidyOptions::CustomCheckValue &V,
ClangTidyContext *Context)
: ClangTidyCheck(Name, Context) {
for (const ClangTidyOptions::CustomCheckDiag &D : V.Diags) {
auto DiagnosticIdIt =
Diags
.try_emplace(D.Level.value_or(DiagnosticIDs::Warning),
llvm::StringMap<llvm::SmallVector<std::string>>{})
.first;
auto DiagMessageIt =
DiagnosticIdIt->getSecond()
.try_emplace(D.BindName, llvm::SmallVector<std::string>{})
.first;
DiagMessageIt->second.emplace_back(D.Message);
}
Matchers = parseQuery(V, Context);
}
void QueryCheck::registerMatchers(MatchFinder *Finder) {
for (const ast_matchers::dynamic::DynTypedMatcher &M : Matchers)
Finder->addDynamicMatcher(M, this);
}
void QueryCheck::check(const MatchFinder::MatchResult &Result) {
auto Emit = [this](const DiagMaps &DiagMaps, const std::string &BindName,
const DynTypedNode &Node, DiagnosticIDs::Level Level) {
DiagMaps::const_iterator DiagMapIt = DiagMaps.find(Level);
if (DiagMapIt == DiagMaps.end())
return;
const BindNameMapToDiagMessage &BindNameMap = DiagMapIt->second;
BindNameMapToDiagMessage::const_iterator BindNameMapIt =
BindNameMap.find(BindName);
if (BindNameMapIt == BindNameMap.end())
return;
for (const std::string &Message : BindNameMapIt->second)
diag(Node.getSourceRange().getBegin(), Message, Level);
};
for (const auto &[Name, Node] : Result.Nodes.getMap())
Emit(Diags, Name, Node, DiagnosticIDs::Warning);
// place Note last, otherwise it will not be emitted
for (const auto &[Name, Node] : Result.Nodes.getMap())
Emit(Diags, Name, Node, DiagnosticIDs::Note);
}
} // namespace clang::tidy::custom
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