| 1 | // Copyright Antony Polukhin, 2013-2024. |
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| 2 | |
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| 3 | // Distributed under the Boost Software License, Version 1.0. |
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| 4 | // (See the accompanying file LICENSE_1_0.txt |
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| 5 | // or a copy at <http://www.boost.org/LICENSE_1_0.txt>.) |
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| 6 | |
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| 7 | #include <boost/lexical_cast.hpp> |
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| 8 | |
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| 9 | #include <array> |
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| 10 | #include <string> |
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| 11 | #include <cstdio> |
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| 12 | |
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| 13 | #ifdef BOOST_MSVC |
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| 14 | # pragma warning(disable: 4996) // `strerror` is not safe |
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| 15 | #endif |
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| 16 | |
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| 17 | //[lexical_cast_log_errno |
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| 18 | //`The following example uses numeric data in a string expression: |
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| 19 | |
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| 20 | void log_message(const std::string &); |
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| 21 | |
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| 22 | void log_errno(int yoko) |
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| 23 | { |
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| 24 | log_message("Error " + boost::lexical_cast<std::string>(arg: yoko) + ": " + strerror(errnum: yoko)); |
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| 25 | } |
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| 26 | |
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| 27 | //] [/lexical_cast_log_errno] |
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| 28 | |
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| 29 | |
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| 30 | //[lexical_cast_fixed_buffer |
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| 31 | //`The following example converts some number and puts it to file: |
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| 32 | |
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| 33 | void number_to_file(int number, std::FILE* file) |
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| 34 | { |
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| 35 | using buf_t = std::array<char, 50>; |
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| 36 | buf_t buffer = boost::lexical_cast<buf_t>(arg: number); // No dynamic memory allocation |
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| 37 | std::fputs(s: buffer.data(), stream: file); |
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| 38 | } |
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| 39 | |
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| 40 | //] [/lexical_cast_fixed_buffer] |
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| 41 | |
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| 42 | //[lexical_cast_substring_conversion |
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| 43 | //`The following example takes part of the string and converts it to `int`: |
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| 44 | |
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| 45 | int convert_strings_part(const std::string& s, std::size_t pos, std::size_t n) |
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| 46 | { |
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| 47 | return boost::lexical_cast<int>(chars: s.data() + pos, count: n); |
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| 48 | } |
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| 49 | |
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| 50 | //] [/lexical_cast_substring_conversion] |
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| 51 | |
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| 52 | void log_message(const std::string &) {} |
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| 53 | |
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| 54 | int main() |
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| 55 | { |
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| 56 | return 0; |
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| 57 | } |
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| 58 | |
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| 59 | |
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