1 | //===-- StringLexer.h -------------------------------------------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #ifndef LLDB_UTILITY_STRINGLEXER_H |
10 | #define LLDB_UTILITY_STRINGLEXER_H |
11 | |
12 | #include <initializer_list> |
13 | #include <string> |
14 | #include <utility> |
15 | |
16 | namespace lldb_private { |
17 | |
18 | class StringLexer { |
19 | public: |
20 | typedef std::string::size_type Position; |
21 | typedef std::string::size_type Size; |
22 | |
23 | typedef std::string::value_type Character; |
24 | |
25 | StringLexer(std::string s); |
26 | |
27 | // These APIs are not bounds-checked. Use HasAtLeast() if you're not sure. |
28 | Character Peek(); |
29 | |
30 | bool NextIf(Character c); |
31 | |
32 | std::pair<bool, Character> NextIf(std::initializer_list<Character> cs); |
33 | |
34 | bool AdvanceIf(const std::string &token); |
35 | |
36 | Character Next(); |
37 | |
38 | bool HasAtLeast(Size s); |
39 | |
40 | std::string GetUnlexed(); |
41 | |
42 | // This will assert if there are less than s characters preceding the cursor. |
43 | void PutBack(Size s); |
44 | |
45 | StringLexer &operator=(const StringLexer &rhs); |
46 | |
47 | private: |
48 | std::string m_data; |
49 | Position m_position; |
50 | |
51 | void Consume(); |
52 | }; |
53 | |
54 | } // namespace lldb_private |
55 | |
56 | #endif // LLDB_UTILITY_STRINGLEXER_H |
57 | |