GlobPattern.h revision 341825 
1//===-- GlobPattern.h - glob pattern matcher implementation -*- C++ -*-----===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements a glob pattern matcher. The glob pattern is the
11// rule used by the shell.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_SUPPORT_GLOB_PATTERN_H
16#define LLVM_SUPPORT_GLOB_PATTERN_H
17
18#include "llvm/ADT/BitVector.h"
19#include "llvm/ADT/Optional.h"
20#include "llvm/ADT/StringRef.h"
21#include "llvm/Support/Error.h"
22#include <vector>
23
24// This class represents a glob pattern. Supported metacharacters
25// are "*", "?", "[<chars>]" and "[^<chars>]".
26namespace llvm {
27class BitVector;
28template <typename T> class ArrayRef;
29
30class GlobPattern {
31public:
32  static Expected<GlobPattern> create(StringRef Pat);
33  bool match(StringRef S) const;
34
35private:
36  bool matchOne(ArrayRef<BitVector> Pat, StringRef S) const;
37
38  // Parsed glob pattern.
39  std::vector<BitVector> Tokens;
40
41  // The following members are for optimization.
42  Optional<StringRef> Exact;
43  Optional<StringRef> Prefix;
44  Optional<StringRef> Suffix;
45};
46}
47
48#endif // LLVM_SUPPORT_GLOB_PATTERN_H
49