65 lines
1.3 KiB
C++
65 lines
1.3 KiB
C++
#include <iostream>
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#include <fstream>
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#include <string>
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#include "token.hpp"
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static bool had_error = false;
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static void report(int line, std::string where, std::string message)
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{
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std::cerr << "[line " << line << "] Error" << where << ": " << message;
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had_error = true;
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}
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void error(int line, std::string message)
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{
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report(line, "", message);
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}
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static void run(std::string source)
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{
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std::string_view buf {source};
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(void)buf;
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}
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static void run_prompt()
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{
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constexpr auto prompt = "> ";
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std::string line;
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std::cout << prompt << std::flush;
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while (std::getline(std::cin, line)) {
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run(line);
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std::cout << prompt << std::flush;
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}
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}
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static int run_file(char const * const filename)
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{
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std::ifstream is {filename, std::ios::binary | std::ios::ate};
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if (!is.is_open()) {
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std::cerr << "failed to open " << filename << std::endl;
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return -1;
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}
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const std::streampos size = is.tellg();
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std::string buf(size, '\0');
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is.seekg(0);
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if (!is.read(&buf[0], size)) {
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std::cerr << "read failed" << std::endl;
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return -1;
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}
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run(buf);
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return had_error;
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}
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int main(const int argc, char const * const argv[])
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{
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switch (argc) {
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case 1: run_prompt(); return had_error;
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case 2: return run_file(argv[1]);
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default:
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std::cerr << "Usage: " << argv[0] << " [filename]" << std::endl;
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return -1;
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}
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}
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