forked from OSchip/llvm-project
689 lines
20 KiB
C++
689 lines
20 KiB
C++
//===--- IdentifierNamingCheck.cpp - clang-tidy ---------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "IdentifierNamingCheck.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Format.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#define DEBUG_TYPE "clang-tidy"
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using namespace clang::ast_matchers;
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namespace clang {
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namespace tidy {
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namespace readability {
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// clang-format off
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#define NAMING_KEYS(m) \
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m(Namespace) \
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m(InlineNamespace) \
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m(EnumConstant) \
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m(ConstexprVariable) \
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m(ConstantMember) \
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m(PrivateMember) \
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m(ProtectedMember) \
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m(PublicMember) \
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m(Member) \
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m(ClassConstant) \
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m(ClassMember) \
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m(GlobalConstant) \
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m(GlobalVariable) \
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m(LocalConstant) \
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m(LocalVariable) \
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m(StaticConstant) \
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m(StaticVariable) \
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m(Constant) \
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m(Variable) \
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m(ConstantParameter) \
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m(ParameterPack) \
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m(Parameter) \
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m(AbstractClass) \
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m(Struct) \
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m(Class) \
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m(Union) \
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m(Enum) \
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m(GlobalFunction) \
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m(ConstexprFunction) \
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m(Function) \
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m(ConstexprMethod) \
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m(VirtualMethod) \
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m(ClassMethod) \
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m(PrivateMethod) \
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m(ProtectedMethod) \
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m(PublicMethod) \
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m(Method) \
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m(Typedef) \
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m(TypeTemplateParameter) \
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m(ValueTemplateParameter) \
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m(TemplateTemplateParameter) \
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m(TemplateParameter) \
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enum StyleKind {
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#define ENUMERATE(v) SK_ ## v,
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NAMING_KEYS(ENUMERATE)
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#undef ENUMERATE
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SK_Count,
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SK_Invalid
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};
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static StringRef const StyleNames[] = {
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#define STRINGIZE(v) #v,
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NAMING_KEYS(STRINGIZE)
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#undef STRINGIZE
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};
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#undef NAMING_KEYS
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// clang-format on
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IdentifierNamingCheck::IdentifierNamingCheck(StringRef Name,
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ClangTidyContext *Context)
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: ClangTidyCheck(Name, Context) {
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auto const fromString = [](StringRef Str) {
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return llvm::StringSwitch<CaseType>(Str)
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.Case("lower_case", CT_LowerCase)
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.Case("UPPER_CASE", CT_UpperCase)
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.Case("camelBack", CT_CamelBack)
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.Case("CamelCase", CT_CamelCase)
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.Default(CT_AnyCase);
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};
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for (auto const &Name : StyleNames) {
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NamingStyles.push_back(
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NamingStyle(fromString(Options.get((Name + "Case").str(), "")),
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Options.get((Name + "Prefix").str(), ""),
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Options.get((Name + "Suffix").str(), "")));
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}
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IgnoreFailedSplit = Options.get("IgnoreFailedSplit", 0);
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}
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void IdentifierNamingCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
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auto const toString = [](CaseType Type) {
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switch (Type) {
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case CT_AnyCase:
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return "aNy_CasE";
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case CT_LowerCase:
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return "lower_case";
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case CT_CamelBack:
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return "camelBack";
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case CT_UpperCase:
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return "UPPER_CASE";
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case CT_CamelCase:
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return "CamelCase";
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}
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llvm_unreachable("Unknown Case Type");
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};
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for (size_t i = 0; i < SK_Count; ++i) {
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Options.store(Opts, (StyleNames[i] + "Case").str(),
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toString(NamingStyles[i].Case));
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Options.store(Opts, (StyleNames[i] + "Prefix").str(),
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NamingStyles[i].Prefix);
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Options.store(Opts, (StyleNames[i] + "Suffix").str(),
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NamingStyles[i].Suffix);
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}
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Options.store(Opts, "IgnoreFailedSplit", IgnoreFailedSplit);
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}
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void IdentifierNamingCheck::registerMatchers(MatchFinder *Finder) {
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Finder->addMatcher(namedDecl().bind("decl"), this);
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Finder->addMatcher(usingDecl().bind("using"), this);
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Finder->addMatcher(declRefExpr().bind("declRef"), this);
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Finder->addMatcher(cxxConstructorDecl().bind("classRef"), this);
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Finder->addMatcher(cxxDestructorDecl().bind("classRef"), this);
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Finder->addMatcher(typeLoc().bind("typeLoc"), this);
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Finder->addMatcher(nestedNameSpecifierLoc().bind("nestedNameLoc"), this);
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}
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static bool matchesStyle(StringRef Name,
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IdentifierNamingCheck::NamingStyle Style) {
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static llvm::Regex Matchers[] = {
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llvm::Regex("^.*$"),
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llvm::Regex("^[a-z][a-z0-9_]*$"),
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llvm::Regex("^[a-z][a-zA-Z0-9]*$"),
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llvm::Regex("^[A-Z][A-Z0-9_]*$"),
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llvm::Regex("^[A-Z][a-zA-Z0-9]*$"),
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};
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bool Matches = true;
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if (Name.startswith(Style.Prefix))
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Name = Name.drop_front(Style.Prefix.size());
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else
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Matches = false;
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if (Name.endswith(Style.Suffix))
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Name = Name.drop_back(Style.Suffix.size());
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else
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Matches = false;
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if (!Matchers[static_cast<size_t>(Style.Case)].match(Name))
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Matches = false;
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return Matches;
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}
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static std::string fixupWithCase(StringRef Name,
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IdentifierNamingCheck::CaseType Case) {
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static llvm::Regex Splitter(
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"([a-z0-9A-Z]*)(_+)|([A-Z]?[a-z0-9]+)([A-Z]|$)|([A-Z]+)([A-Z]|$)");
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SmallVector<StringRef, 8> Substrs;
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Name.split(Substrs, "_", -1, false);
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SmallVector<StringRef, 8> Words;
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for (auto Substr : Substrs) {
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while (!Substr.empty()) {
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SmallVector<StringRef, 8> Groups;
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if (!Splitter.match(Substr, &Groups))
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break;
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if (Groups[2].size() > 0) {
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Words.push_back(Groups[1]);
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Substr = Substr.substr(Groups[0].size());
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} else if (Groups[3].size() > 0) {
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Words.push_back(Groups[3]);
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Substr = Substr.substr(Groups[0].size() - Groups[4].size());
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} else if (Groups[5].size() > 0) {
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Words.push_back(Groups[5]);
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Substr = Substr.substr(Groups[0].size() - Groups[6].size());
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}
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}
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}
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if (Words.empty())
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return Name;
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std::string Fixup;
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switch (Case) {
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case IdentifierNamingCheck::CT_AnyCase:
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Fixup += Name;
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break;
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case IdentifierNamingCheck::CT_LowerCase:
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for (auto const &Word : Words) {
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if (&Word != &Words.front())
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Fixup += "_";
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Fixup += Word.lower();
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}
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break;
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case IdentifierNamingCheck::CT_UpperCase:
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for (auto const &Word : Words) {
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if (&Word != &Words.front())
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Fixup += "_";
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Fixup += Word.upper();
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}
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break;
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case IdentifierNamingCheck::CT_CamelCase:
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for (auto const &Word : Words) {
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Fixup += Word.substr(0, 1).upper();
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Fixup += Word.substr(1).lower();
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}
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break;
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case IdentifierNamingCheck::CT_CamelBack:
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for (auto const &Word : Words) {
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if (&Word == &Words.front()) {
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Fixup += Word.lower();
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} else {
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Fixup += Word.substr(0, 1).upper();
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Fixup += Word.substr(1).lower();
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}
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}
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break;
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}
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return Fixup;
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}
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static std::string fixupWithStyle(StringRef Name,
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IdentifierNamingCheck::NamingStyle Style) {
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return Style.Prefix + fixupWithCase(Name, Style.Case) + Style.Suffix;
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}
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static StyleKind findStyleKind(
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const NamedDecl *D,
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const std::vector<IdentifierNamingCheck::NamingStyle> &NamingStyles) {
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if (isa<TypedefDecl>(D) && NamingStyles[SK_Typedef].isSet())
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return SK_Typedef;
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if (const auto *Decl = dyn_cast<NamespaceDecl>(D)) {
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if (Decl->isAnonymousNamespace())
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return SK_Invalid;
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if (Decl->isInline() && NamingStyles[SK_InlineNamespace].isSet())
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return SK_InlineNamespace;
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if (NamingStyles[SK_Namespace].isSet())
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return SK_Namespace;
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}
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if (isa<EnumDecl>(D) && NamingStyles[SK_Enum].isSet())
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return SK_Enum;
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if (isa<EnumConstantDecl>(D)) {
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if (NamingStyles[SK_EnumConstant].isSet())
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return SK_EnumConstant;
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if (NamingStyles[SK_Constant].isSet())
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return SK_Constant;
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return SK_Invalid;
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}
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if (const auto *Decl = dyn_cast<CXXRecordDecl>(D)) {
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if (Decl->isAnonymousStructOrUnion())
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return SK_Invalid;
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if (Decl->hasDefinition() && Decl->isAbstract() &&
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NamingStyles[SK_AbstractClass].isSet())
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return SK_AbstractClass;
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if (Decl->isStruct() && NamingStyles[SK_Struct].isSet())
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return SK_Struct;
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if (Decl->isStruct() && NamingStyles[SK_Class].isSet())
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return SK_Class;
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if (Decl->isClass() && NamingStyles[SK_Class].isSet())
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return SK_Class;
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if (Decl->isClass() && NamingStyles[SK_Struct].isSet())
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return SK_Struct;
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if (Decl->isUnion() && NamingStyles[SK_Union].isSet())
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return SK_Union;
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if (Decl->isEnum() && NamingStyles[SK_Enum].isSet())
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return SK_Enum;
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return SK_Invalid;
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}
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if (const auto *Decl = dyn_cast<FieldDecl>(D)) {
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QualType Type = Decl->getType();
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if (!Type.isNull() && Type.isLocalConstQualified() &&
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NamingStyles[SK_ConstantMember].isSet())
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return SK_ConstantMember;
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if (!Type.isNull() && Type.isLocalConstQualified() &&
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NamingStyles[SK_Constant].isSet())
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return SK_Constant;
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if (Decl->getAccess() == AS_private &&
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NamingStyles[SK_PrivateMember].isSet())
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return SK_PrivateMember;
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if (Decl->getAccess() == AS_protected &&
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NamingStyles[SK_ProtectedMember].isSet())
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return SK_ProtectedMember;
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if (Decl->getAccess() == AS_public && NamingStyles[SK_PublicMember].isSet())
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return SK_PublicMember;
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if (NamingStyles[SK_Member].isSet())
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return SK_Member;
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return SK_Invalid;
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}
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if (const auto *Decl = dyn_cast<ParmVarDecl>(D)) {
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QualType Type = Decl->getType();
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if (Decl->isConstexpr() && NamingStyles[SK_ConstexprVariable].isSet())
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return SK_ConstexprVariable;
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if (!Type.isNull() && Type.isLocalConstQualified() &&
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NamingStyles[SK_ConstantParameter].isSet())
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return SK_ConstantParameter;
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if (!Type.isNull() && Type.isLocalConstQualified() &&
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NamingStyles[SK_Constant].isSet())
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return SK_Constant;
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if (Decl->isParameterPack() && NamingStyles[SK_ParameterPack].isSet())
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return SK_ParameterPack;
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if (NamingStyles[SK_Parameter].isSet())
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return SK_Parameter;
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return SK_Invalid;
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}
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if (const auto *Decl = dyn_cast<VarDecl>(D)) {
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QualType Type = Decl->getType();
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if (Decl->isConstexpr() && NamingStyles[SK_ConstexprVariable].isSet())
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return SK_ConstexprVariable;
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if (!Type.isNull() && Type.isLocalConstQualified() &&
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Decl->isStaticDataMember() && NamingStyles[SK_ClassConstant].isSet())
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return SK_ClassConstant;
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if (!Type.isNull() && Type.isLocalConstQualified() &&
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Decl->isFileVarDecl() && NamingStyles[SK_GlobalConstant].isSet())
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return SK_GlobalConstant;
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if (!Type.isNull() && Type.isLocalConstQualified() &&
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Decl->isStaticLocal() && NamingStyles[SK_StaticConstant].isSet())
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return SK_StaticConstant;
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if (!Type.isNull() && Type.isLocalConstQualified() &&
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Decl->isLocalVarDecl() && NamingStyles[SK_LocalConstant].isSet())
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return SK_LocalConstant;
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if (!Type.isNull() && Type.isLocalConstQualified() &&
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Decl->isFunctionOrMethodVarDecl() &&
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NamingStyles[SK_LocalConstant].isSet())
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return SK_LocalConstant;
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if (!Type.isNull() && Type.isLocalConstQualified() &&
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NamingStyles[SK_Constant].isSet())
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return SK_Constant;
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if (Decl->isStaticDataMember() && NamingStyles[SK_ClassMember].isSet())
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return SK_ClassMember;
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if (Decl->isFileVarDecl() && NamingStyles[SK_GlobalVariable].isSet())
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return SK_GlobalVariable;
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if (Decl->isStaticLocal() && NamingStyles[SK_StaticVariable].isSet())
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return SK_StaticVariable;
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if (Decl->isLocalVarDecl() && NamingStyles[SK_LocalVariable].isSet())
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return SK_LocalVariable;
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if (Decl->isFunctionOrMethodVarDecl() &&
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NamingStyles[SK_LocalVariable].isSet())
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return SK_LocalVariable;
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if (NamingStyles[SK_Variable].isSet())
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return SK_Variable;
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return SK_Invalid;
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}
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if (const auto *Decl = dyn_cast<CXXMethodDecl>(D)) {
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if (Decl->isMain() || !Decl->isUserProvided() ||
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Decl->isUsualDeallocationFunction() ||
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Decl->isCopyAssignmentOperator() || Decl->isMoveAssignmentOperator() ||
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Decl->size_overridden_methods() > 0)
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return SK_Invalid;
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if (Decl->isConstexpr() && NamingStyles[SK_ConstexprMethod].isSet())
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return SK_ConstexprMethod;
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if (Decl->isConstexpr() && NamingStyles[SK_ConstexprFunction].isSet())
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return SK_ConstexprFunction;
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if (Decl->isStatic() && NamingStyles[SK_ClassMethod].isSet())
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return SK_ClassMethod;
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if (Decl->isVirtual() && NamingStyles[SK_VirtualMethod].isSet())
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return SK_VirtualMethod;
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if (Decl->getAccess() == AS_private &&
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NamingStyles[SK_PrivateMethod].isSet())
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return SK_PrivateMethod;
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if (Decl->getAccess() == AS_protected &&
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NamingStyles[SK_ProtectedMethod].isSet())
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return SK_ProtectedMethod;
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if (Decl->getAccess() == AS_public && NamingStyles[SK_PublicMethod].isSet())
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return SK_PublicMethod;
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if (NamingStyles[SK_Method].isSet())
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return SK_Method;
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if (NamingStyles[SK_Function].isSet())
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return SK_Function;
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return SK_Invalid;
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}
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if (const auto *Decl = dyn_cast<FunctionDecl>(D)) {
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if (Decl->isMain())
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return SK_Invalid;
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if (Decl->isConstexpr() && NamingStyles[SK_ConstexprFunction].isSet())
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return SK_ConstexprFunction;
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if (Decl->isGlobal() && NamingStyles[SK_GlobalFunction].isSet())
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return SK_GlobalFunction;
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if (NamingStyles[SK_Function].isSet())
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return SK_Function;
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}
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if (isa<TemplateTypeParmDecl>(D)) {
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if (NamingStyles[SK_TypeTemplateParameter].isSet())
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return SK_TypeTemplateParameter;
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if (NamingStyles[SK_TemplateParameter].isSet())
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return SK_TemplateParameter;
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return SK_Invalid;
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}
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if (isa<NonTypeTemplateParmDecl>(D)) {
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if (NamingStyles[SK_ValueTemplateParameter].isSet())
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return SK_ValueTemplateParameter;
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if (NamingStyles[SK_TemplateParameter].isSet())
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return SK_TemplateParameter;
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return SK_Invalid;
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}
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if (isa<TemplateTemplateParmDecl>(D)) {
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if (NamingStyles[SK_TemplateTemplateParameter].isSet())
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return SK_TemplateTemplateParameter;
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if (NamingStyles[SK_TemplateParameter].isSet())
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return SK_TemplateParameter;
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return SK_Invalid;
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}
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return SK_Invalid;
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}
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static void addUsage(IdentifierNamingCheck::NamingCheckFailureMap &Failures,
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const NamedDecl *Decl, SourceRange Range,
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const SourceManager *SM) {
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// Do nothing if the provided range is invalid.
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if (Range.getBegin().isInvalid() || Range.getEnd().isInvalid())
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return;
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// Try to insert the identifier location in the Usages map, and bail out if it
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// is already in there
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auto &Failure = Failures[Decl];
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if (!Failure.RawUsageLocs.insert(Range.getBegin().getRawEncoding()).second)
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return;
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Failure.ShouldFix = Failure.ShouldFix && !Range.getBegin().isMacroID() &&
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!Range.getEnd().isMacroID();
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}
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void IdentifierNamingCheck::check(const MatchFinder::MatchResult &Result) {
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if (const auto *Decl =
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Result.Nodes.getNodeAs<CXXConstructorDecl>("classRef")) {
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if (Decl->isImplicit())
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return;
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addUsage(NamingCheckFailures, Decl->getParent(),
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Decl->getNameInfo().getSourceRange(), Result.SourceManager);
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return;
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}
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if (const auto *Decl =
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|
Result.Nodes.getNodeAs<CXXDestructorDecl>("classRef")) {
|
|
if (Decl->isImplicit())
|
|
return;
|
|
|
|
SourceRange Range = Decl->getNameInfo().getSourceRange();
|
|
if (Range.getBegin().isInvalid())
|
|
return;
|
|
// The first token that will be found is the ~ (or the equivalent trigraph),
|
|
// we want instead to replace the next token, that will be the identifier.
|
|
Range.setBegin(CharSourceRange::getTokenRange(Range).getEnd());
|
|
|
|
addUsage(NamingCheckFailures, Decl->getParent(), Range,
|
|
Result.SourceManager);
|
|
return;
|
|
}
|
|
|
|
if (const auto *Loc = Result.Nodes.getNodeAs<TypeLoc>("typeLoc")) {
|
|
NamedDecl *Decl = nullptr;
|
|
if (const auto &Ref = Loc->getAs<TagTypeLoc>()) {
|
|
Decl = Ref.getDecl();
|
|
} else if (const auto &Ref = Loc->getAs<InjectedClassNameTypeLoc>()) {
|
|
Decl = Ref.getDecl();
|
|
} else if (const auto &Ref = Loc->getAs<UnresolvedUsingTypeLoc>()) {
|
|
Decl = Ref.getDecl();
|
|
} else if (const auto &Ref = Loc->getAs<TemplateTypeParmTypeLoc>()) {
|
|
Decl = Ref.getDecl();
|
|
}
|
|
|
|
if (Decl) {
|
|
addUsage(NamingCheckFailures, Decl, Loc->getSourceRange(),
|
|
Result.SourceManager);
|
|
return;
|
|
}
|
|
|
|
if (const auto &Ref = Loc->getAs<TemplateSpecializationTypeLoc>()) {
|
|
const auto *Decl =
|
|
Ref.getTypePtr()->getTemplateName().getAsTemplateDecl();
|
|
|
|
SourceRange Range(Ref.getTemplateNameLoc(), Ref.getTemplateNameLoc());
|
|
if (const auto *ClassDecl = dyn_cast<TemplateDecl>(Decl)) {
|
|
addUsage(NamingCheckFailures, ClassDecl->getTemplatedDecl(), Range,
|
|
Result.SourceManager);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (const auto &Ref =
|
|
Loc->getAs<DependentTemplateSpecializationTypeLoc>()) {
|
|
addUsage(NamingCheckFailures, Ref.getTypePtr()->getAsTagDecl(),
|
|
Loc->getSourceRange(), Result.SourceManager);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (const auto *Loc =
|
|
Result.Nodes.getNodeAs<NestedNameSpecifierLoc>("nestedNameLoc")) {
|
|
if (NestedNameSpecifier *Spec = Loc->getNestedNameSpecifier()) {
|
|
if (NamespaceDecl *Decl = Spec->getAsNamespace()) {
|
|
addUsage(NamingCheckFailures, Decl, Loc->getLocalSourceRange(),
|
|
Result.SourceManager);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (const auto *Decl = Result.Nodes.getNodeAs<UsingDecl>("using")) {
|
|
for (const auto &Shadow : Decl->shadows()) {
|
|
addUsage(NamingCheckFailures, Shadow->getTargetDecl(),
|
|
Decl->getNameInfo().getSourceRange(), Result.SourceManager);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (const auto *DeclRef = Result.Nodes.getNodeAs<DeclRefExpr>("declRef")) {
|
|
SourceRange Range = DeclRef->getNameInfo().getSourceRange();
|
|
addUsage(NamingCheckFailures, DeclRef->getDecl(), Range,
|
|
Result.SourceManager);
|
|
return;
|
|
}
|
|
|
|
if (const auto *Decl = Result.Nodes.getNodeAs<NamedDecl>("decl")) {
|
|
if (!Decl->getIdentifier() || Decl->getName().empty() || Decl->isImplicit())
|
|
return;
|
|
|
|
// Ignore ClassTemplateSpecializationDecl which are creating duplicate
|
|
// replacements with CXXRecordDecl
|
|
if (isa<ClassTemplateSpecializationDecl>(Decl))
|
|
return;
|
|
|
|
StyleKind SK = findStyleKind(Decl, NamingStyles);
|
|
if (SK == SK_Invalid)
|
|
return;
|
|
|
|
NamingStyle Style = NamingStyles[SK];
|
|
StringRef Name = Decl->getName();
|
|
if (matchesStyle(Name, Style))
|
|
return;
|
|
|
|
std::string KindName = fixupWithCase(StyleNames[SK], CT_LowerCase);
|
|
std::replace(KindName.begin(), KindName.end(), '_', ' ');
|
|
|
|
std::string Fixup = fixupWithStyle(Name, Style);
|
|
if (StringRef(Fixup).equals(Name)) {
|
|
if (!IgnoreFailedSplit) {
|
|
DEBUG(llvm::dbgs()
|
|
<< Decl->getLocStart().printToString(*Result.SourceManager)
|
|
<< llvm::format(": unable to split words for %s '%s'\n",
|
|
KindName.c_str(), Name));
|
|
}
|
|
} else {
|
|
NamingCheckFailure &Failure = NamingCheckFailures[Decl];
|
|
SourceRange Range =
|
|
DeclarationNameInfo(Decl->getDeclName(), Decl->getLocation())
|
|
.getSourceRange();
|
|
|
|
Failure.Fixup = std::move(Fixup);
|
|
Failure.KindName = std::move(KindName);
|
|
addUsage(NamingCheckFailures, Decl, Range, Result.SourceManager);
|
|
}
|
|
}
|
|
}
|
|
|
|
void IdentifierNamingCheck::onEndOfTranslationUnit() {
|
|
for (const auto &Pair : NamingCheckFailures) {
|
|
const NamedDecl &Decl = *Pair.first;
|
|
const NamingCheckFailure &Failure = Pair.second;
|
|
|
|
if (Failure.KindName.empty())
|
|
continue;
|
|
|
|
if (Failure.ShouldFix) {
|
|
auto Diag = diag(Decl.getLocation(), "invalid case style for %0 '%1'")
|
|
<< Failure.KindName << Decl.getName();
|
|
|
|
for (const auto &Loc : Failure.RawUsageLocs) {
|
|
// We assume that the identifier name is made of one token only. This is
|
|
// always the case as we ignore usages in macros that could build
|
|
// identifier names by combining multiple tokens.
|
|
//
|
|
// For destructors, we alread take care of it by remembering the
|
|
// location of the start of the identifier and not the start of the
|
|
// tilde.
|
|
//
|
|
// Other multi-token identifiers, such as operators are not checked at
|
|
// all.
|
|
Diag << FixItHint::CreateReplacement(
|
|
SourceRange(SourceLocation::getFromRawEncoding(Loc)),
|
|
Failure.Fixup);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace readability
|
|
} // namespace tidy
|
|
} // namespace clang
|