1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// Copyright (C) 2024 T. Zachary Laine
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//[ parsing_into_a_class_example
#include <boost/parser/parser.hpp>
#include <iostream>
#include <string>
namespace bp = boost::parser;
int main()
{
std::cout << "Enter a string followed by two unsigned integers. ";
std::string input;
std::getline(std::cin, input);
//[ parsing_into_a_class_str
constexpr auto string_uint_uint =
bp::lexeme[+(bp::char_ - ' ')] >> bp::uint_ >> bp::uint_;
std::string string_from_parse;
if (parse(input, string_uint_uint, bp::ws, string_from_parse))
std::cout << "That yields this string: " << string_from_parse << "\n";
else
std::cout << "Parse failure.\n";
//]
std::cout << "Enter an unsigned integer followed by a string. ";
std::getline(std::cin, input);
std::cout << input << "\n";
//[ parsing_into_a_class_vec_of_strs
constexpr auto uint_string = bp::uint_ >> +bp::char_;
std::vector<std::string> vector_from_parse;
if (parse(input, uint_string, bp::ws, vector_from_parse)) {
std::cout << "That yields this vector of strings:\n";
for (auto && str : vector_from_parse) {
std::cout << " '" << str << "'\n";
}
} else {
std::cout << "Parse failure.\n";
}
//]
}
//]
|
