Make a Lisp
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/*
* Copyright (C) 2023 Riyyi
*
* SPDX-License-Identifier: MIT
*/
#include <csignal> // std::signal
#include <cstdlib> // std::exit
#include <string>
#include <string_view>
#include <vector>
#include "ruc/argparser.h"
#include "ruc/format/color.h"
#include "ast.h"
#include "environment.h"
#include "error.h"
#include "eval.h"
#include "forward.h"
#include "lexer.h"
#include "printer.h"
#include "reader.h"
#include "readline.h"
#include "settings.h"
#if 0
namespace blaze {
static EnvironmentPtr s_outer_env = Environment::create();
static auto cleanup(int signal) -> void
{
print("\033[0m\n");
std::exit(signal);
}
auto read(std::string_view input) -> ValuePtr
{
Lexer lexer(input);
lexer.tokenize();
if (Settings::the().get("dump-lexer") == "1") {
lexer.dump();
}
Reader reader(std::move(lexer.tokens()));
reader.read();
if (Settings::the().get("dump-reader") == "1") {
reader.dump();
}
return reader.node();
}
auto eval(ValuePtr ast, EnvironmentPtr env) -> ValuePtr
{
if (env == nullptr) {
env = s_outer_env;
}
Eval eval(ast, env);
eval.eval();
return eval.ast();
}
static auto print(ValuePtr exp) -> std::string
{
Printer printer;
return printer.print(exp, true);
}
static auto rep(std::string_view input, EnvironmentPtr env) -> std::string
{
Error::the().clearErrors();
Error::the().setInput(input);
return print(eval(read(input), env));
}
static std::string_view lambdaTable[] = {
"(def! not (fn* (cond) (if cond false true)))",
"(def! load-file (fn* (filename) \
(eval (read-string (str \"(do \" (slurp filename) \"\nnil)\")))))",
};
static auto installLambdas(EnvironmentPtr env) -> void
{
for (auto function : lambdaTable) {
rep(function, env);
}
}
static auto makeArgv(EnvironmentPtr env, std::vector<std::string> arguments) -> void
{
auto list = makePtr<List>();
if (arguments.size() > 1) {
for (auto it = arguments.begin() + 1; it != arguments.end(); ++it) {
list->add(makePtr<String>(*it));
}
}
env->set("*ARGV*", list);
}
} // namespace blaze
auto main(int argc, char* argv[]) -> int
{
bool dump_lexer = false;
bool dump_reader = false;
bool pretty_print = false;
std::string_view history_path = "~/.blaze-history";
std::vector<std::string> arguments;
// CLI arguments
ruc::ArgParser arg_parser;
arg_parser.addOption(dump_lexer, 'l', "dump-lexer", nullptr, nullptr);
arg_parser.addOption(dump_reader, 'r', "dump-reader", nullptr, nullptr);
arg_parser.addOption(pretty_print, 'c', "color", nullptr, nullptr);
arg_parser.addOption(history_path, 'h', "history-path", nullptr, nullptr, nullptr, ruc::ArgParser::Required::Yes);
arg_parser.addArgument(arguments, "arguments", nullptr, nullptr, ruc::ArgParser::Required::No);
arg_parser.parse(argc, argv);
// Set settings
blaze::Settings::the().set("dump-lexer", dump_lexer ? "1" : "0");
blaze::Settings::the().set("dump-reader", dump_reader ? "1" : "0");
blaze::Settings::the().set("pretty-print", pretty_print ? "1" : "0");
// Signal callbacks
std::signal(SIGINT, blaze::cleanup);
std::signal(SIGTERM, blaze::cleanup);
installFunctions(blaze::s_outer_env);
installLambdas(blaze::s_outer_env);
makeArgv(blaze::s_outer_env, arguments);
if (arguments.size() > 0) {
rep(format("(load-file \"{}\")", arguments.front()), blaze::s_outer_env);
return 0;
}
blaze::Readline readline(pretty_print, history_path);
std::string input;
while (readline.get(input)) {
if (pretty_print) {
print("\033[0m");
}
print("{}\n", rep(input, blaze::s_outer_env));
}
if (pretty_print) {
print("\033[0m");
}
return 0;
}
#endif