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#include <iostream>
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#include <iomanip>
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#include <algorithm>
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#include <sstream>
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#include <cmath>
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#include <chrono>
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#include <fstream>
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#include <span>
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#include <cstring>
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#include "UserScript.h"
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void print_value(std::ostream& stream, const scripting::script_value& res, bool array_print = false) {
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if(std::holds_alternative<scripting::array>(res)) {
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stream << "[";
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auto max = std::get<scripting::array>(res).value.size();
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auto no_comma = max - 1;
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for(size_t idx = 0; idx < max; ++idx) {
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print_value(stream, std::get<scripting::array>(res).value[idx], true);
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stream << (idx != no_comma ? ", " : "");
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}
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stream << "]";
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} else if(std::holds_alternative<std::string>(res)) {
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if(array_print) {
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stream << std::quoted(std::get<std::string>(res));
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} else {
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stream << std::get<std::string>(res);
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}
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} else if(std::holds_alternative<scripting::null>(res)) {
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stream << "null";
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} else {
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stream << std::get<int32_t>(res);
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}
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}
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struct identity : public scripting::function_impl {
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std::optional<scripting::script_value> apply(scripting::UserScript* self,std::vector<scripting::argument> args, std::optional<scripting::script_error>& errors) final {
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if(args.size() != 1) {
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errors = scripting::script_error{.message = "identity expects a single argument"};
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} else {
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if(std::holds_alternative<scripting::script_value>(args.front())) {
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return std::get<scripting::script_value>(args.front());
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} else {
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return self->resolve(std::get<scripting::script_variable>(args.front()).name);
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}
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}
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return scripting::script_value({});
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}
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};
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struct print : public scripting::function_impl {
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std::ostream& stream;
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print(std::ostream& _stream) : stream(_stream) {}
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std::optional<scripting::script_value> apply(scripting::UserScript* self,std::vector<scripting::argument> args, std::optional<scripting::script_error>& errors) final {
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while(not args.empty()) {
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auto& arg = args.back();
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if(std::holds_alternative<scripting::script_value>(arg)) {
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print_value(stream, std::get<scripting::script_value>(arg));
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} else {
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print_value(stream, self->resolve(std::get<scripting::script_variable>(arg).name));
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}
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args.pop_back();
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}
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return scripting::script_value({});
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}
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};
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struct set : public scripting::function_impl {
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std::optional<scripting::script_value> apply(scripting::UserScript* self,std::vector<scripting::argument> args, std::optional<scripting::script_error>& errors) final {
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if(args.size() != 2) {
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errors = scripting::script_error{
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.message = "set expects 2 arguments"
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};
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return scripting::script_value{};
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}
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auto& var = args.back();
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if(not holds_alternative<scripting::script_variable>(var)) {
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errors = scripting::script_error{
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.message = "set expects the first argument to be a target variable"
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};
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return scripting::script_value{};
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}
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auto& arg = args.front();
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if(std::holds_alternative<scripting::script_value>(arg)) {
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self->setValue(get<scripting::script_variable>(var).name, std::get<scripting::script_value>(arg));
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} else {
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self->setValue(get<scripting::script_variable>(var).name, self->resolve(std::get<scripting::script_variable>(arg).name));
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}
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if(auto v = self->getValue(get<scripting::script_variable>(var).name); v) {
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return v.value();
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} else {
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return scripting::script_value{};
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}
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}
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};
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struct terminate : public scripting::function_impl {
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std::optional<scripting::script_value> apply(scripting::UserScript*,std::vector<scripting::argument>, std::optional<scripting::script_error>&) final {
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std::exit(1);
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// PLEASE DO NOT ACTUALLY EXIT YOU FUCKING IDIOT
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return scripting::script_value({});
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}
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};
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struct fn_exit : public scripting::function_impl {
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bool& exit_val;
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fn_exit(bool& _exit_val) : exit_val(_exit_val) {}
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std::optional<scripting::script_value> apply(scripting::UserScript*,std::vector<scripting::argument>, std::optional<scripting::script_error>&) final {
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exit_val = true;
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return scripting::script_value({});
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}
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};
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void process_bench(std::string target = "./tests/scripts/testfile.test") {
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auto engine = scripting::prepare_interpreter(std::string{});
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engine->registerFunction("identity", std::make_unique<identity>());
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engine->registerFunction("exit", std::make_unique<terminate>());
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engine->registerFunction("set", std::make_unique<set>());
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/***
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* This is a half assed benchmark,
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* Document results here to keep the thingy in check performance wise (release mode only)
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*
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* 2023-07-04 Archivist -> 2618ns - 308ns - 49ns (clang+libstdc++)
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* 2023-07-07 Archivist -> 2481ns - 291ns - 46ns (clang+libc++)
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* 2023-07-07 Archivist -> 106ns - 12ns - 2ns (clang+march=native+libc++)
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*/
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engine->registerFunction("print", std::make_unique<print>(std::cout));
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std::ifstream src_str(target);
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std::stringstream code;
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code << src_str.rdbuf();
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int steps = 0;
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decltype(std::chrono::high_resolution_clock::now()-std::chrono::high_resolution_clock::now()) per_exec{}, per_step{}, per_op{};
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for(int runs = 0; runs < 5000; runs++) {
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auto res = engine->prepare(code.str());
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auto begin = std::chrono::high_resolution_clock::now();
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while (not engine->getValue("exit_ctr").has_value()) {
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engine->stepOnce();
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steps++;
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}
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auto end = std::chrono::high_resolution_clock::now();
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per_exec += (end - begin);
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per_step += (end - begin);
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per_op += (end - begin);
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}
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per_exec /= 5000;
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per_step /= steps;
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per_op = per_op / 5000 / 53;
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std::cout << "time per exec = " << std::chrono::duration_cast<std::chrono::nanoseconds>(per_exec).count() << "ns\n";
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std::cout << "time per step = " << std::chrono::duration_cast<std::chrono::nanoseconds>(per_step).count() << "ns\n";
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std::cout << "time per avg op = " << std::chrono::duration_cast<std::chrono::nanoseconds>(per_op).count() << "ns\n";
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}
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void compile_bench(std::string target = "./tests/scripts/testfile.test") {
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auto engine = scripting::prepare_interpreter(std::string{});
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engine->registerFunction("identity", std::make_unique<identity>());
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engine->registerFunction("exit", std::make_unique<terminate>());
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engine->registerFunction("set", std::make_unique<set>());
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/***
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* Same as above but for compilation times
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*
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* 2023-07-04 Archivist -> 386µs
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*/
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engine->registerFunction("print", std::make_unique<print>(std::cout));
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std::ifstream src_str("./tests/scripts/testfile.test");
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std::stringstream code;
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code << src_str.rdbuf();
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auto begin = std::chrono::high_resolution_clock::now();
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[&]() __attribute__((optimize("O0"))) {
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auto res = engine->prepare(code.str());
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res = engine->prepare(code.str());
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res = engine->prepare(code.str());
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res = engine->prepare(code.str());
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res = engine->prepare(code.str());
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}();
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auto end = std::chrono::high_resolution_clock::now();
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auto per_exec = (end - begin)/5;
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std::cout << "time per exec = " << std::chrono::duration_cast<std::chrono::microseconds>(per_exec).count() << "µs\n";
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}
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void compare(std::string target, std::string expect) {
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auto engine = scripting::prepare_interpreter(std::string{});
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engine->registerFunction("identity", std::make_unique<identity>());
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engine->registerFunction("exit", std::make_unique<terminate>());
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engine->registerFunction("set", std::make_unique<set>());
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engine = scripting::register_array_lib(std::move(engine), true, 4096);
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std::stringstream str;
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std::string_view filename_source = target;
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std::string_view filename_output = expect;
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engine->registerFunction("print", std::make_unique<print>(str));
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std::ifstream src_str(std::string{filename_source});
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std::stringstream code;
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code << src_str.rdbuf();
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std::ifstream out_str(std::string{filename_output});
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std::stringstream output;
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output << out_str.rdbuf();
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auto res = engine->executeAtOnce(code.str());
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if (std::holds_alternative<scripting::script_value>(res)) {
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} else {
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auto &errors = std::get<std::vector<scripting::script_error>>(res);
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for (auto &line: errors) {
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str << line.message << "\n at line " << line.location->line_number << ":"
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<< line.location->column_number << "\n";
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str << " " << *line.location->line_contents << "\n";
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str << " " << std::string(line.location->column_number - 1, ' ') << "^\n";
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}
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}
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int status = 0;
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while(not output.eof()) {
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std::string expected, found;
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std::getline(output, expected);
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std::getline(str, found);
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bool ok = (expected != found);
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status+= ok ;
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(ok ? std::cerr : std::cout)
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<< (not ok ? "\033[21;32m" : "\033[1;31m") << expected
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<< std::string(std::max<size_t>(0, 40 - expected.size()), ' ')<< "| " << found << std::endl;
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}
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if(status) std::exit(status);
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}
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void immediate_interactive() {
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bool should_exit = false;
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auto engine = scripting::prepare_interpreter(std::string{});
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engine->registerFunction("identity", std::make_unique<identity>());
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engine->registerFunction("exit", std::make_unique<fn_exit>(should_exit));
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engine->registerFunction("set", std::make_unique<set>());
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engine = scripting::register_array_lib(std::move(engine), true, 4096);
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engine->registerFunction("print", std::make_unique<print>(std::cout));
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while (not should_exit) {
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std::string code;
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std::getline(std::cin, code);
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auto res = engine->executeAtOnce(code);
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if (std::holds_alternative<scripting::script_value>(res)) {
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} else {
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auto &errors = std::get<std::vector<scripting::script_error>>(res);
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for (auto &line: errors) {
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std::cout << line.message << "\n at line ";
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if(line.location) {
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std::cout << line.location->line_number << ":"
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<< line.location->column_number << "\n";
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std::cout << " " << *line.location->line_contents << "\n";
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std::cout << " " << std::string(line.location->column_number - 1, ' ') << "^\n";
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} else std::cout << "UNKNOWN\n";
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}
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}
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}
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}
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void exec(std::span<std::string_view> args) {
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std::vector<decltype(scripting::prepare_interpreter(std::string{}))> batch;
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auto engine = scripting::prepare_interpreter(std::string{});
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engine->registerFunction("identity", std::make_unique<identity>());
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engine->registerFunction("terminate", std::make_unique<terminate>());
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engine->registerFunction("set", std::make_unique<set>());
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engine = scripting::register_array_lib(std::move(engine), true, 4096);
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engine->registerFunction("print", std::make_unique<print>(std::cout));
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bool exit = false;
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while (not exit) {
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std::string code;
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std::getline(std::cin, code);
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auto res = engine->executeAtOnce(code);
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if (std::holds_alternative<scripting::script_value>(res)) {
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} else {
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auto &errors = std::get<std::vector<scripting::script_error>>(res);
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for (auto &line: errors) {
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std::cout << line.message << "\n at line ";
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if(line.location) {
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std::cout << line.location->line_number << ":"
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<< line.location->column_number << "\n";
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std::cout << " " << *line.location->line_contents << "\n";
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std::cout << " " << std::string(line.location->column_number - 1, ' ') << "^\n";
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} else std::cout << "UNKNOWN\n";
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}
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}
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}
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}
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#if defined(__linux__) or defined(WIN32)
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constexpr bool trim_first_argument = true;
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#else
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constexpr bool trim_first_argument = false;
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static_assert(false, "Undefined status of the first argument");
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#endif
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int cpp_main(std::span<std::string_view> args) {
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if constexpr (trim_first_argument) {
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args = args.subspan(1);
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}
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if(args.empty() || args.front() == "immediate") {
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immediate_interactive();
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std::exit(0);
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} else if(args.front() == "compare") {
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args = args.subspan(1);
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if(args.size() != 2) {
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std::cerr << "compare expects 2 files as arguments" << std::endl;
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std::terminate();
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}
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} else if(args.front() == "bench_exec") {
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args = args.subspan(1);
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if(args.size() > 1) {
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std::cerr << "bench_exec expects 0 or 1 file as arguments" << std::endl;
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std::terminate();
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}
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if(args.empty()) process_bench();
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else process_bench(std::string{args.front()});
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} else if(args.front() == "bench_compile") {
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args = args.subspan(1);
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if(args.size() > 1) {
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std::cerr << "bench_compile expects 0 or 1 file as arguments" << std::endl;
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std::terminate();
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}
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if(args.empty()) compile_bench();
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else compile_bench(std::string{args.front()});
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} else if(args.front() == "exec") {
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// exec(args.subspan(1));
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} else {
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std::cerr << "Unknown option" << std::endl;
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}
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return 0;
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}
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int main(int argc, char** argv) {
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std::vector<std::string_view> args;
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for(auto& arg : std::span(argv, argv+argc)) {
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args.emplace_back(arg, arg+strlen(arg));
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}
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return cpp_main(args);
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}
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