anyproc/examples/repl.cpp

#include "anyproc.hpp"

#include <iostream>
#include <string>



int main(int argc, char **argv) {
    if (argc != 2) {
        std::cerr << "Usage: " << argv[0] << " <model file>" << std::endl;
        return -1;
    }

    PyEval eval(argv[1]);

    const auto progress_indicator = [] (float progress) {
        if (progress < 2.5f || progress > 90.0f) {
            std::cout << "\r      \r";
            return true;
        }
        std::cout << unsigned(progress) << "% \r" << std::flush;
        return true;
    };

    bool had_nl = false,
         had_begin = false,
         first_token;
    const auto result_printer = [&] (const char *token) {
        std::cout << token << std::flush;
        if (token[0] == '\n')
            had_nl = true;
        if ((had_nl || first_token) && token[0] == '>' && token[1] == '>') {
            had_begin = true;
            return false;
        }
        first_token = false;
        return true;
    };

    for (;;) {
        std::string expr;
        std::cout << ">>> " << std::flush;
        std::getline(std::cin, expr);
        eval.begin();
        if (expr.empty())
            continue;
        bool no_value = expr[0] == '$';
        if (expr.find("import ") == 0) {
            eval.load_module(expr.substr(7, expr.size()-7)).finish();
        } else if (no_value) {
            eval.expression(expr.substr(1, expr.size()-1)).finish();
        } else {
            first_token = true;
            had_begin = false;
            eval.expression(expr).run(progress_indicator, result_printer);
            if (had_begin) {
                eval.get_inference().append("> \n");
                std::cout << "\r    \r";
            } else if (!had_nl) {
                std::cout << '\n';
            }
            had_nl = false;
        }
    }
}