76 lines
1.5 KiB
C++
76 lines
1.5 KiB
C++
#include "token.hh"
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#include "scanner.hh"
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#include <iostream>
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#include <fstream>
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#include <string>
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#include <sysexits.h>
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#include <cstdint>
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#include <vector>
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#define PROMPT "> "
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static bool had_error = false;
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void run_file(const char *path);
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void run_prompt();
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void run(const std::string &code);
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void error(int line, const std::string &message);
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void report(int line, const std::string &where, const std::string &message);
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int main(int argc, char *argv[]) {
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if (argc > 2) {
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std::cout << "Usage: cclox [script]\n";
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exit(EX_USAGE);
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}
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if (argc == 2) {
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run_file(argv[1]);
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} else {
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run_prompt();
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}
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return 0;
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}
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void run_file(const char *path) {
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if (std::ifstream source_code{path, std::ios::ate}) {
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uint64_t size = source_code.tellg();
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std::string code(size, '\0');
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source_code.seekg(0);
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source_code.read(&code[0], size);
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run(code);
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if (had_error) {
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exit(EX_DATAERR);
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}
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}
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}
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void run_prompt() {
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std::string line{};
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std::cout << PROMPT;
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while (std::getline(std::cin, line)) {
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run(line);
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std::cout << PROMPT;
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had_error = false;
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}
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}
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void run(const std::string &code) {
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Scanner scanner{code};
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std::vector<Token> tokens = scanner.scan_tokens();
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for (auto token : tokens) {
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std::cout << token << '\n';
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}
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}
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void error(int line, const std::string &message) {
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report(line, "", message);
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}
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void report(int line, const std::string &where, const std::string &message) {
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std::cout << "[line " << line << "] Error" << where << ": " << message << '\n';
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had_error = true;
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}
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