69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
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//===--- SimplifySubscriptExprCheck.cpp - clang-tidy-----------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "SimplifySubscriptExprCheck.h"
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#include "../utils/OptionsUtils.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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using namespace clang::ast_matchers;
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namespace clang::tidy::readability {
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static const char KDefaultTypes[] =
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"::std::basic_string;::std::basic_string_view;::std::vector;::std::array;::"
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"std::span";
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SimplifySubscriptExprCheck::SimplifySubscriptExprCheck(
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StringRef Name, ClangTidyContext *Context)
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: ClangTidyCheck(Name, Context), Types(utils::options::parseStringList(
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Options.get("Types", KDefaultTypes))) {
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}
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void SimplifySubscriptExprCheck::registerMatchers(MatchFinder *Finder) {
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const auto TypesMatcher = hasUnqualifiedDesugaredType(
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recordType(hasDeclaration(cxxRecordDecl(hasAnyName(Types)))));
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Finder->addMatcher(
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arraySubscriptExpr(hasBase(
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cxxMemberCallExpr(
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has(memberExpr().bind("member")),
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on(hasType(qualType(
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unless(anyOf(substTemplateTypeParmType(),
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hasDescendant(substTemplateTypeParmType()))),
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anyOf(TypesMatcher, pointerType(pointee(TypesMatcher)))))),
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callee(namedDecl(hasName("data"))))
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.bind("call"))),
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this);
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}
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void SimplifySubscriptExprCheck::check(const MatchFinder::MatchResult &Result) {
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const auto *Call = Result.Nodes.getNodeAs<CXXMemberCallExpr>("call");
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if (Result.Context->getSourceManager().isMacroBodyExpansion(
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Call->getExprLoc()))
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return;
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const auto *Member = Result.Nodes.getNodeAs<MemberExpr>("member");
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auto DiagBuilder =
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diag(Member->getMemberLoc(),
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"accessing an element of the container does not require a call to "
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"'data()'; did you mean to use 'operator[]'?");
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if (Member->isArrow())
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DiagBuilder << FixItHint::CreateInsertion(Member->getBeginLoc(), "(*")
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<< FixItHint::CreateInsertion(Member->getOperatorLoc(), ")");
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DiagBuilder << FixItHint::CreateRemoval(
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{Member->getOperatorLoc(), Call->getEndLoc()});
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}
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void SimplifySubscriptExprCheck::storeOptions(
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ClangTidyOptions::OptionMap &Opts) {
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Options.store(Opts, "Types", utils::options::serializeStringList(Types));
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}
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} // namespace clang::tidy::readability
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