C++ S-expression Library

WARNING: This library is experimental and under heavy-development.

Sexi is an easy to use s-expression library for C11 and C++17.

Example

Given a file test.se with the following contents:

(add 1 2)
(sub 3 4)
(mul 5 6)
(div 7 8)

We can parse and read the data like so:

#include <fstream>
#include <iostream>
#include <iterator>

#include "sexi.h"

int main(){
	std::ifstream file("test.se");
	std::string str(std::istreambuf_iterator<char>{file}, {});

	auto result = sexi::parse(str);
	
	for(auto &&expr : result){
		std::cout << expr.toStr() << '\n';
    }
}

Or you can declare s-expressions inline with the _se user-defined literal and << operator:

#include "sexi/literals.hpp"

using namespace sexi::literals;

int main(){
	auto expr =
		("add"_se << 1 << 2) <<
		("sub"_se << 3 << 4) <<
		("mul"_se << 5 << 6) <<
		("div"_se << 7 << 8);
	
	std::ifstream file("test.se");
	std::string str(std::istreambuf_iterator<char>{file}, {});
	
	auto result = sexi::parse(str);
	
	assert(result.exprs() == expr.toList());
}

Roadmap / TODO

• Add proper numeric types/conversions for values.
• Handle operators/punctuation correctly.
• Add binary s-expression encode/decode.