namespace parser = boost::parser;
auto result = parser::parse(input, parser, skip);

My First c++ Example

#include <boost/parser/parser.hpp>

namespace parser = boost::parser;

int main()
{
	std::string input = "1.2,2.3, 3.4 ,4.5		     ,  8.7   	, 	 2.4";
	auto result = parser::parse(
		input,
		parser::double_ >> *(',' >> parser::double_),
		parser::ws
	);
	static_assert(std::same_as<decltype(result), std::optional<std::vector<double>>>);
	if (result)
	{
		for (auto & x: *result)
		{
			std::cout << "=> " << x << std::endl;
		}
	}
	else
	{
		std::cout << "parse error" << std::endl;
	}
}

output:

=> 1.2
=> 2.3
=> 3.4
=> 4.5
=> 8.7
=> 2.4

My second c++ example

#include <boost/parser/parser.hpp>
#include <iostream>

namespace parser = boost::parser;

int main()
{
	const std::string input = "1.2, 2.3 ,3.4 , 4.5   ,	,		,,    , 7,8,9.2";
	auto result = parser::parse(
		input,
		+parser::double_,
		parser::ws | parser::char_(',')
	);
	static_assert(std::same_as<decltype(result), std::optional<std::vector<double>>>);
	if (result)
		for (auto & x: *result)
			std::cout << "=> " << x << std::endl;
	else
		std::cout << "parse error" << std::endl;
}

output:

=> 1.2
=> 2.3
=> 3.4
=> 4.5
=> 7
=> 8
=> 9.2

parser::parse overloaded

namespace parser = boost::parser;

bool r = parser::parse(input, -parser-, attr, trace-mode=-off-);

auto result = parser::parse(input, -parser-, trace-mode=-off-);

bool r = parser::parse(input, -parser-, -skip-, -atr-, trace-mode=-off-);

auto result = parser::parse(input, -parser-, -skip, trace-mode=-off-);

Jan 21, 2025

Back

Up

cpp/c++

c++ std::exception:

std::cout.write(err.data(), err.size());

std::cout << std::endl;

caught:

  ===================================
  #  The c++ programming language.  #
  #                                 #
  #  Join c++                       #
  #  Deck                           #
  ===================================

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