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fd67aa11 | 1 | /* Copyright (C) 2021-2024 Free Software Foundation, Inc. |
bb368aad VM |
2 | Contributed by Oracle. |
3 | ||
4 | This file is part of GNU Binutils. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, 51 Franklin Street - Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
20 | ||
21 | #ifndef _QLPARSER_H | |
22 | #define _QLPARSER_H | |
23 | ||
24 | #include <sstream> | |
25 | #include <istream> | |
26 | #include <iostream> | |
27 | #include "Expression.h" | |
28 | ||
29 | /* This class contains parser inputs (a string, if non-NULL: if NULL, use cin), | |
30 | and outputs (obtained via operator(), which resets the output | |
31 | expression). The destructor deletes the returned expression to allow | |
32 | exception throws on syntax error to clean up properly. */ | |
33 | ||
34 | namespace QL | |
35 | { | |
36 | struct Result | |
37 | { | |
38 | std::stringstream streamify; | |
39 | public: | |
40 | std::istream in; | |
41 | Expression *out; | |
42 | ||
43 | Result () : in (std::cin.rdbuf ()), out (NULL) { } | |
44 | Result (const char *instr) : streamify (std::string (instr)), | |
45 | in (streamify.rdbuf ()), out (NULL) { } | |
46 | ||
47 | Expression *operator() () | |
48 | { | |
49 | Expression *o = out; | |
50 | out = NULL; | |
51 | return o; | |
52 | } | |
53 | ||
54 | ~Result () | |
55 | { | |
56 | delete out; | |
57 | } | |
58 | }; | |
59 | }; | |
60 | ||
61 | #endif /* _QLPARSER_H */ |