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//===--- GlobList.h ---------------------------------------------*- 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_TOOLS_EXTRA_CLANG_TIDY_GLOBLIST_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GLOBLIST_H
#include "clang/Basic/LLVM.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Regex.h"
namespace clang::tidy {
/// Read-only set of strings represented as a list of positive and negative
/// globs.
///
/// Positive globs add all matched strings to the set, negative globs remove
/// them in the order of appearance in the list.
class GlobList {
public:
virtual ~GlobList() = default;
/// \p Globs is a comma-separated list of globs (only the '*' metacharacter is
/// supported) with an optional '-' prefix to denote exclusion.
///
/// An empty \p Globs string is interpreted as one glob that matches an empty
/// string.
///
/// \p KeepNegativeGlobs a bool flag indicating whether to keep negative
/// globs from \p Globs or not. When false, negative globs are simply ignored.
GlobList(StringRef Globs, bool KeepNegativeGlobs = true);
/// Returns \c true if the pattern matches \p S. The result is the last
/// matching glob's Positive flag.
virtual bool contains(StringRef S) const;
private:
struct GlobListItem {
bool IsPositive;
llvm::Regex Regex;
};
SmallVector<GlobListItem, 0> Items;
};
/// A \p GlobList that caches search results, so that search is performed only
/// once for the same query.
class CachedGlobList final : public GlobList {
public:
using GlobList::GlobList;
/// \see GlobList::contains
bool contains(StringRef S) const override;
private:
mutable llvm::StringMap<bool> Cache;
};
} // namespace clang::tidy
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GLOBLIST_H
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