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28
29/// \file examples/interpreter.cpp
30/// Implementation of a basic command-line Lua interpreter.
31
32#include <cstdlib>
33#include <iostream>
34#include <string>
35
36#include <lutok/exceptions.hpp>
37#include <lutok/operations.hpp>
38#include <lutok/state.ipp>
39
40
41/// Executes a Lua statement provided by the user with error checking.
42///
43/// \param state The Lua state in which to process the statement.
44/// \param line The textual statement provided by the user.
45static void
46run_statement(lutok::state& state, const std::string& line)
47{
48    try {
49        // This utility function allows us to feed a given piece of Lua code to
50        // the interpreter and process it.  The piece of code can include
51        // multiple statements separated by a semicolon or by a newline
52        // character.
53        lutok::do_string(state, line);
54    } catch (const lutok::error& error) {
55        std::cerr << "ERROR: " << error.what() << '\n';
56    }
57}
58
59
60/// Program's entry point.
61///
62/// \return A system exit code.
63int
64main(void)
65{
66    // Create a new session and load some standard libraries.
67    lutok::state state;
68    state.open_base();
69    state.open_string();
70    state.open_table();
71
72    for (;;) {
73        std::cout << "lua> ";
74        std::cout.flush();
75
76        std::string line;
77        if (!std::getline(std::cin, line).good())
78            break;
79        run_statement(state, line);
80    }
81
82    return EXIT_SUCCESS;
83}
84