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196 rader
10 KiB
196 rader
10 KiB
#include "molasses/lexer.h"
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#include "molasses/parser_primitives.h"
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#include <cstring>
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#include <filesystem>
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#include <fstream>
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#include <iostream>
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#include <stack>
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#include <string>
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#include <variant>
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using compile_element = std::variant<molasses::lexed_output, molasses::generate_context, std::string>;
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struct build_system_error : std::runtime_error {
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explicit build_system_error(const std::string& message)
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: std::runtime_error(message)
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{}
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};
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int main(int argc, char** argv) {
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std::vector<std::string> arguments;
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while(argc > 1) {
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argv++;
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arguments.emplace_back(*argv, strlen(*argv));
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argc--;
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}
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try {
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std::stack<compile_element> compile_stack;
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for(auto elem : arguments) {
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if(elem == "generate") {
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if(not compile_stack.empty() and std::holds_alternative<std::string>(compile_stack.top())) {
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auto filename = std::get<std::string>(compile_stack.top());
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compile_stack.pop();
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if(not compile_stack.empty() and std::holds_alternative<molasses::generate_context>(compile_stack.top())) {
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auto generator = std::get<molasses::generate_context>(compile_stack.top());
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compile_stack.pop();
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auto assembler = molasses::generate(generator);
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std::ofstream output(filename + ".s");
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for(const auto& line : assembler) {
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output << line;
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}
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compile_stack.emplace(filename);
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} else
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throw build_system_error("generate expects a parsed output\n");
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} else
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throw build_system_error("generate expects a filename\n");
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} else if(elem == "parse") {
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molasses::parser_context ctx;
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ctx = molasses::register_integers(ctx);
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ctx = molasses::register_i32_operations(ctx);
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if(not compile_stack.empty() and std::holds_alternative<molasses::lexed_output>(compile_stack.top())) {
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auto lexer = std::get<molasses::lexed_output>(compile_stack.top());
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compile_stack.pop();
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auto generator = molasses::parse(ctx, lexer);
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compile_stack.emplace(generator);
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} else
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throw build_system_error("parse expects a lexed output\n");
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} else if(elem == "lex") {
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if(not compile_stack.empty() and std::holds_alternative<std::string>(compile_stack.top())) {
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auto filename = std::get<std::string>(compile_stack.top());
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compile_stack.pop();
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if(not std::filesystem::exists(filename))
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throw build_system_error("file " + filename + " does not exist\n");
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std::ifstream t(filename);
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std::stringstream buffer;
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buffer << t.rdbuf();
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auto lexed = molasses::lex(filename, buffer.str());
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compile_stack.emplace(lexed);
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} else
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throw build_system_error("lex expects a filename\n");
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} else if(elem == "lex-all") {
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std::vector<molasses::lexed_output> lexed_list;
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while(not compile_stack.empty() and std::holds_alternative<std::string>(compile_stack.top())) {
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auto filename = std::get<std::string>(compile_stack.top());
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compile_stack.pop();
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if(not std::filesystem::exists(filename))
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throw build_system_error("file " + filename + " does not exist\n");
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std::ifstream t(filename);
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std::stringstream buffer;
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buffer << t.rdbuf();
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auto lexed = molasses::lex(filename, buffer.str());
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lexed_list.emplace_back(lexed);
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}
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for(auto& lexed : lexed_list) {
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compile_stack.emplace(std::move(lexed));
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}
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} else if(elem == "merge") {
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if(not compile_stack.empty() and std::holds_alternative<molasses::lexed_output>(compile_stack.top())) {
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auto lexer_1 = std::get<molasses::lexed_output>(compile_stack.top());
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compile_stack.pop();
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if(not compile_stack.empty() and std::holds_alternative<molasses::lexed_output>(compile_stack.top())) {
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auto lexer_2 = std::get<molasses::lexed_output>(compile_stack.top());
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compile_stack.pop();
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compile_stack.emplace(molasses::concatenate(lexer_1, lexer_2));
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} else
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throw build_system_error("merge expects 2 lexed outputs\n");
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} else
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throw build_system_error("merge expects 2 lexed outputs\n");
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} else if(elem == "merge-all") {
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if(not compile_stack.empty() and std::holds_alternative<molasses::lexed_output>(compile_stack.top())) {
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auto lexer_1 = std::get<molasses::lexed_output>(compile_stack.top());
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compile_stack.pop();
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while(not compile_stack.empty() and std::holds_alternative<molasses::lexed_output>(compile_stack.top())) {
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auto lexer_2 = std::get<molasses::lexed_output>(compile_stack.top());
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compile_stack.pop();
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lexer_1 = molasses::concatenate(lexer_1, lexer_2);
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}
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compile_stack.emplace(lexer_1);
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} else
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throw build_system_error("merge-all expects at least 1 lexed outputs\n");
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} else if(elem == "assemble") {
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if(not compile_stack.empty() and std::holds_alternative<std::string>(compile_stack.top())) {
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auto filename = std::get<std::string>(compile_stack.top());
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compile_stack.pop();
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std::stringstream compile;
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compile << "clang -c " << filename << ".s -o " << filename << ".o";
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std::stringstream link;
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link << "ld -e _start " << filename << ".o -o " << filename;
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std::cout << compile.str() << std::endl;
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system(compile.str().c_str());
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std::cout << link.str() << std::endl;
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system(link.str().c_str());
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} else
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throw build_system_error("assemble expects an assembly file\n");
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} else if(elem == "help" or elem == "--help") {
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std::cout << "# Sugar\n\n";
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std::cout << "## Commands\n\n";
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std::cout << "lex : string ➔ lexed_output\n";
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std::cout << "> takes a filename to a file that must be compiled\n\n";
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std::cout << "lex-all : string* ➔ lexed_output*\n";
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std::cout << "> takes as many filenames to files that must be compiled as can be read and passes them through the lexed\n\n";
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std::cout << "merge : lexed_output lexed_output ➔ lexed_output\n";
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std::cout << "> merges two lexed modules together\n\n";
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std::cout << "merge-all : lexed_output* ➔ lexed_output\n";
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std::cout << "> merges as many lexed modules together as present on the top of the stack\n\n";
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std::cout << "parse : lexed_output ➔ parsed_output\n";
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std::cout << "> prepares code for generation\n\n";
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std::cout << "generate : parsed_output string ➔ string\n";
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std::cout << "> takes a root filename, it will be appended with \".s\" and that will be the generated assembly file,\n";
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std::cout << "> the filename will not be consumed\n\n";
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std::cout << "assemble : string ➔ _ \n";
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std::cout
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<< "> takes a root filename, it will be appended with \".s\" and that file will be compiled,\n";
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std::cout << "> the compiled output will be the given filename\n\n";
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std::cout << "help : _ ➔ _ \n";
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std::cout << "> prints this help\n\n";
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std::cout << "## Examples\n\n";
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std::cout << "- compile the file \"example.mol\" into the \"potato.s\" assembly file\n";
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std::cout << "> `$ sugar example.mol lex parse potato generate`\n";
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std::cout << "\n";
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std::cout << "- compile the file \"example.mol\" into the \"potato\" executable\n";
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std::cout << "> `$ sugar example.mol lex parse potato generate assemble`\n";
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std::cout << "\n";
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std::cout << "- compile the file \"example.mol\" and \"2.mol\" into the \"potato\" executable\n";
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std::cout << "> `$ sugar example.mol lex 2.mol lex merge parse potato generate assemble`\n";
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} else
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compile_stack.emplace(elem);
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}
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if(compile_stack.size() > 1) throw std::runtime_error("build left unfinished operations");
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if(not compile_stack.empty()) {
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if(std::holds_alternative<molasses::lexed_output>(compile_stack.top())) {
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auto lexer = std::get<molasses::lexed_output>(compile_stack.top());
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for(const auto& elem : lexer.symbols) {
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std::cout << elem << " ";
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}
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std::cout << "\n\n";
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for(auto [id, name] : lexer.dictionary) {
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std::cout << id << ": " << name << "\n";
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}
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} else if(std::holds_alternative<molasses::generate_context>(compile_stack.top())) {
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auto generator = std::get<molasses::generate_context>(compile_stack.top());
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for(const auto& elem : generator.procedures) {
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std::cout << elem->_name << " : ";
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for(const auto& args : elem->_args) {
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std::cout << args << " ";
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}
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std::cout << "->";
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for(const auto& rets : elem->_rets) {
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std::cout << " " << rets;
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}
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std::cout << "\n";
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}
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}
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}
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} catch (molasses::parser_error& error) {
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std::cerr << "COMPILER ERROR:\n" << error.what();
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return 1;
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} catch (build_system_error& error) {
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std::cerr << "BUILD SYSTEM ERROR:\n" << error.what();
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return 1;
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}
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}
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