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//===---------- IssueHash.h - Generate identification hashes ----*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_ANALYSIS_ISSUEHASH_H
#define LLVM_CLANG_ANALYSIS_ISSUEHASH_H
#include "llvm/ADT/SmallString.h"
namespace clang {
class Decl;
class FullSourceLoc;
class LangOptions;
/// Returns an opaque identifier for a diagnostic.
///
/// This opaque identifier is intended to be stable even when the source code
/// is changed. It allows to track diagnostics in the long term, for example,
/// find which diagnostics are "new", maintain a database of suppressed
/// diagnostics etc.
///
/// We may introduce more variants of issue hashes in the future
/// but older variants will still be available for compatibility.
///
/// This hash is based on the following information:
/// - Name of the checker that emitted the diagnostic.
/// - Warning message.
/// - Name of the enclosing declaration.
/// - Contents of the line of code with the issue, excluding whitespace.
/// - Column number (but not the line number! - which makes it stable).
llvm::SmallString<32> getIssueHash(const FullSourceLoc &IssueLoc,
llvm::StringRef CheckerName,
llvm::StringRef WarningMessage,
const Decl *IssueDecl,
const LangOptions &LangOpts);
/// Get the unhashed string representation of the V1 issue hash.
/// When hashed, it becomes the actual issue hash. Useful for testing.
/// See GetIssueHashV1() for more information.
std::string getIssueString(const FullSourceLoc &IssueLoc,
llvm::StringRef CheckerName,
llvm::StringRef WarningMessage,
const Decl *IssueDecl, const LangOptions &LangOpts);
} // namespace clang
#endif
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