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1 | // Copyright 2013 Antony Polukhin |
2 | ||
3 | // Distributed under the Boost Software License, Version 1.0. | |
4 | // (See the accompanying file LICENSE_1_0.txt | |
5 | // or a copy at <http://www.boost.org/LICENSE_1_0.txt>.) | |
6 | ||
7 | #include <boost/lexical_cast.hpp> | |
8 | #include <string> | |
9 | #include <cstdio> | |
10 | ||
11 | //[lexical_cast_log_errno | |
12 | //`The following example uses numeric data in a string expression: | |
13 | ||
14 | void log_message(const std::string &); | |
15 | ||
16 | void log_errno(int yoko) | |
17 | { | |
18 | log_message("Error " + boost::lexical_cast<std::string>(yoko) + ": " + strerror(yoko)); | |
19 | } | |
20 | ||
21 | //] [/lexical_cast_log_errno] | |
22 | ||
23 | ||
24 | //[lexical_cast_fixed_buffer | |
25 | //`The following example converts some number and puts it to file: | |
26 | ||
27 | void number_to_file(int number, FILE* file) | |
28 | { | |
29 | typedef boost::array<char, 50> buf_t; // You can use std::array if your compiler supports it | |
30 | buf_t buffer = boost::lexical_cast<buf_t>(number); // No dynamic memory allocation | |
31 | std::fputs(buffer.begin(), file); | |
32 | } | |
33 | ||
34 | //] [/lexical_cast_fixed_buffer] | |
35 | ||
36 | //[lexical_cast_substring_conversion | |
37 | //`The following example takes part of the string and converts it to `int`: | |
38 | ||
39 | int convert_strings_part(const std::string& s, std::size_t pos, std::size_t n) | |
40 | { | |
41 | return boost::lexical_cast<int>(s.data() + pos, n); | |
42 | } | |
43 | ||
44 | //] [/lexical_cast_substring_conversion] | |
45 | ||
46 | void log_message(const std::string &) {} | |
47 | ||
48 | int main() | |
49 | { | |
50 | return 0; | |
51 | } | |
52 |