forked from OSchip/llvm-project
86 lines
3.1 KiB
C++
86 lines
3.1 KiB
C++
|
//===--- ExplicitConstructorCheck.cpp - clang-tidy ------------------------===//
|
||
|
|
//
|
||
|
|
// The LLVM Compiler Infrastructure
|
||
|
|
//
|
||
|
|
// This file is distributed under the University of Illinois Open Source
|
||
|
|
// License. See LICENSE.TXT for details.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#include "ExplicitConstructorCheck.h"
|
||
|
|
#include "clang/AST/ASTContext.h"
|
||
|
|
#include "clang/ASTMatchers/ASTMatchFinder.h"
|
||
|
|
#include "clang/ASTMatchers/ASTMatchers.h"
|
||
|
|
#include "clang/Lex/Lexer.h"
|
||
|
|
|
||
|
|
using namespace clang::ast_matchers;
|
||
|
|
|
||
|
|
namespace clang {
|
||
|
|
namespace tidy {
|
||
|
|
|
||
|
|
void ExplicitConstructorCheck::registerMatchers(MatchFinder *Finder) {
|
||
|
|
Finder->addMatcher(constructorDecl().bind("ctor"), this);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Looks for the token matching the predicate and returns the range of the found
|
||
|
|
// token including trailing whitespace.
|
||
|
|
SourceRange FindToken(const SourceManager &Sources, LangOptions LangOpts,
|
||
|
|
SourceLocation StartLoc, SourceLocation EndLoc,
|
||
|
|
bool (*Pred)(const Token &)) {
|
||
|
|
if (StartLoc.isMacroID() || EndLoc.isMacroID())
|
||
|
|
return SourceRange();
|
||
|
|
FileID File = Sources.getFileID(Sources.getSpellingLoc(StartLoc));
|
||
|
|
StringRef Buf = Sources.getBufferData(File);
|
||
|
|
const char *StartChar = Sources.getCharacterData(StartLoc);
|
||
|
|
Lexer Lex(StartLoc, LangOpts, StartChar, StartChar, Buf.end());
|
||
|
|
Lex.SetCommentRetentionState(true);
|
||
|
|
Token Tok;
|
||
|
|
do {
|
||
|
|
Lex.LexFromRawLexer(Tok);
|
||
|
|
if (Pred(Tok)) {
|
||
|
|
Token NextTok;
|
||
|
|
Lex.LexFromRawLexer(NextTok);
|
||
|
|
return SourceRange(Tok.getLocation(), NextTok.getLocation());
|
||
|
|
}
|
||
|
|
} while (Tok.isNot(tok::eof) && Tok.getLocation() < EndLoc);
|
||
|
|
|
||
|
|
return SourceRange();
|
||
|
|
}
|
||
|
|
|
||
|
|
void ExplicitConstructorCheck::check(const MatchFinder::MatchResult &Result) {
|
||
|
|
const CXXConstructorDecl *Ctor =
|
||
|
|
Result.Nodes.getNodeAs<CXXConstructorDecl>("ctor");
|
||
|
|
// Do not be confused: isExplicit means 'explicit' keyword is present,
|
||
|
|
// isImplicit means that it's a compiler-generated constructor.
|
||
|
|
if (Ctor->isOutOfLine() || Ctor->isImplicit() || Ctor->isDeleted())
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (Ctor->isExplicit() && Ctor->isCopyOrMoveConstructor()) {
|
||
|
|
auto isKWExplicit = [](const Token &Tok) {
|
||
|
|
return Tok.is(tok::raw_identifier) &&
|
||
|
|
Tok.getRawIdentifier() == "explicit";
|
||
|
|
};
|
||
|
|
SourceRange ExplicitTokenRange =
|
||
|
|
FindToken(*Result.SourceManager, Result.Context->getLangOpts(),
|
||
|
|
Ctor->getOuterLocStart(), Ctor->getLocEnd(), isKWExplicit);
|
||
|
|
DiagnosticBuilder Diag =
|
||
|
|
diag(Ctor->getLocation(), "%0 constructor declared explicit.")
|
||
|
|
<< (Ctor->isMoveConstructor() ? "Move" : "Copy");
|
||
|
|
if (ExplicitTokenRange.isValid()) {
|
||
|
|
Diag << FixItHint::CreateRemoval(
|
||
|
|
CharSourceRange::getCharRange(ExplicitTokenRange));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Ctor->isExplicit() || Ctor->isCopyOrMoveConstructor() ||
|
||
|
|
Ctor->getNumParams() == 0 || Ctor->getMinRequiredArguments() > 1)
|
||
|
|
return;
|
||
|
|
|
||
|
|
SourceLocation Loc = Ctor->getLocation();
|
||
|
|
diag(Loc, "Single-argument constructors must be explicit")
|
||
|
|
<< FixItHint::CreateInsertion(Loc, "explicit ");
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace tidy
|
||
|
|
} // namespace clang
|