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compiler.test.cpp
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compiler.test.cpp
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// Using Catch2 unit testing library
// Let Catch2 define a main function
#define CATCH_CONFIG_MAIN
#include "../include/catch.hpp"
#include "compiler.hpp"
#include "parser.hpp"
// Forward declaration of test helpers
std::shared_ptr<Program> parse(const std::string& input);
Instructions concat_instructions(const std::vector<Instructions>& s);
bool test_instructions(const std::vector<Instructions>& expected, const Instructions& actual);
bool test_integer_constants(const std::vector<int>& expected, const std::vector<std::shared_ptr<Object>>& actual);
bool test_string_constants(const std::vector<std::string>& expected, const std::vector<std::shared_ptr<Object>>& actual);
bool test_function_constants(const std::vector<Instructions>& expected, const std::shared_ptr<Object>& actual);
std::shared_ptr<Program> parse(const std::string& input) {
auto l = Lexer(input);
auto p = Parser(std::move(l));
auto program = p.parse_program();
return program;
}
Instructions concat_instructions(const std::vector<Instructions>& s) {
auto out = Instructions{};
for (const auto& ins: s) {
out.insert(out.end(), ins.begin(), ins.end());
}
return out;
}
bool test_instructions(const std::vector<Instructions>& expected, const Instructions& actual) {
auto concatted = concat_instructions(expected);
if (actual.size() != concatted.size()) {
std::cerr << "wrong instructions length.\nwant:\n" << concatted << "\ngot:\n" << actual << std::endl;
return false;
}
int i = 0;
for (const auto& ins: concatted) {
if (actual.at(i) != ins) {
std::cerr << "wrong instruction at " << i << ".\nwant=\n" << concatted << "\ngot =\n" << actual << std::endl;
return false;
}
i++;
}
return true;
}
bool test_integer_constants(const std::vector<int>& expected, const std::vector<std::shared_ptr<Object>>& actual) {
if (expected.size() != actual.size()) {
std::cerr << "wrong number of constants. got=" << actual.size() << ", want=" << expected.size() << std::endl;
return false;
}
for (int i = 0; i < static_cast<int>(expected.size()); i++) {
auto integer_obj = std::dynamic_pointer_cast<Integer>(actual.at(i));
if (!integer_obj) {
std::cerr << "object is not Integer." << std::endl;
return false;
}
if (integer_obj->value != expected.at(i)) {
std::cerr << "object has wrong value. got=" << integer_obj->value << ", want=" << expected.at(i) << std::endl;
return false;
}
}
return true;
}
bool test_string_constants(const std::vector<std::string>& expected, const std::vector<std::shared_ptr<Object>>& actual) {
if (expected.size() != actual.size()) {
std::cerr << "wrong number of constants. got=" << actual.size() << ", want=" << expected.size() << std::endl;
return false;
}
for (int i = 0; i < static_cast<int>(expected.size()); i++) {
auto string_obj = std::dynamic_pointer_cast<String>(actual.at(i));
if (!string_obj) {
std::cerr << "object is not String." << std::endl;
return false;
}
if (string_obj->value != expected.at(i)) {
std::cerr << "object has wrong value. got=" << string_obj->value << ", want=" << expected.at(i) << std::endl;
return false;
}
}
return true;
}
bool test_function_constants(const std::vector<Instructions>& expected, const std::shared_ptr<Object>& actual) {
auto compiledfunction_obj = std::dynamic_pointer_cast<CompiledFunction>(actual);
if (!compiledfunction_obj) {
std::cerr << "constant is not a function." << std::endl;
return false;
}
auto ok = test_instructions(expected, compiledfunction_obj->instructions);
if (!ok) {
std::cerr << "constant test_instructions failed." << std::endl;
return false;
}
return true;
}
TEST_CASE("Test Integer Arithmetic") {
std::vector<std::tuple<std::string, std::vector<int>, std::vector<Instructions>>> tests = {
std::make_tuple("1 + 2", std::vector<int>{1, 2}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpAdd),
make(OpType::OpPop),
}),
std::make_tuple("1; 2", std::vector<int>{1, 2}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpPop),
make(OpType::OpConstant, 1),
make(OpType::OpPop),
}),
std::make_tuple("1 - 2", std::vector<int>{1, 2}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpSub),
make(OpType::OpPop),
}),
std::make_tuple("1 * 2", std::vector<int>{1, 2}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpMul),
make(OpType::OpPop),
}),
std::make_tuple("2 / 1", std::vector<int>{2, 1}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpDiv),
make(OpType::OpPop),
}),
std::make_tuple("-1", std::vector<int>{1}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpMinus),
make(OpType::OpPop),
}),
};
for (const auto &tt: tests) {
const auto [tt_input, tt_expected_constants, tt_expected_instructions] = tt;
auto program = parse(tt_input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(tt_expected_instructions, bytecode->instructions));
REQUIRE(test_integer_constants(tt_expected_constants, bytecode->constants));
}
}
TEST_CASE("Test Boolean Expressions") {
std::vector<std::tuple<std::string, std::vector<int>, std::vector<Instructions>>> tests = {
std::make_tuple("true", std::vector<int>{}, std::vector<Instructions>{
make(OpType::OpTrue),
make(OpType::OpPop),
}),
std::make_tuple("false", std::vector<int>{}, std::vector<Instructions>{
make(OpType::OpFalse),
make(OpType::OpPop),
}),
std::make_tuple("1 > 2", std::vector<int>{1, 2}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpGreaterThan),
make(OpType::OpPop),
}),
std::make_tuple("1 < 2", std::vector<int>{2, 1}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpGreaterThan),
make(OpType::OpPop),
}),
std::make_tuple("1 == 2", std::vector<int>{1, 2}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpEqual),
make(OpType::OpPop),
}),
std::make_tuple("1 != 2", std::vector<int>{1, 2}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpNotEqual),
make(OpType::OpPop),
}),
std::make_tuple("true == false", std::vector<int>{}, std::vector<Instructions>{
make(OpType::OpTrue),
make(OpType::OpFalse),
make(OpType::OpEqual),
make(OpType::OpPop),
}),
std::make_tuple("true != false", std::vector<int>{}, std::vector<Instructions>{
make(OpType::OpTrue),
make(OpType::OpFalse),
make(OpType::OpNotEqual),
make(OpType::OpPop),
}),
std::make_tuple("!true", std::vector<int>{}, std::vector<Instructions>{
make(OpType::OpTrue),
make(OpType::OpBang),
make(OpType::OpPop),
}),
};
for (const auto &tt: tests) {
const auto [tt_input, tt_expected_constants, tt_expected_instructions] = tt;
auto program = parse(tt_input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(tt_expected_instructions, bytecode->instructions));
REQUIRE(test_integer_constants(tt_expected_constants, bytecode->constants));
}
}
TEST_CASE("Test Conditionals") {
std::vector<std::tuple<std::string, std::vector<int>, std::vector<Instructions>>> tests = {
std::make_tuple("if (true) { 10 }; 3333;", std::vector<int>{10, 3333}, std::vector<Instructions>{
make(OpType::OpTrue),
make(OpType::OpJumpNotTruthy, 10),
make(OpType::OpConstant, 0),
make(OpType::OpJump, 11),
make(OpType::OpNull),
make(OpType::OpPop),
make(OpType::OpConstant, 1),
make(OpType::OpPop),
}),
std::make_tuple("if (true) { 10 } else { 20 }; 3333;", std::vector<int>{10, 20, 3333}, std::vector<Instructions>{
make(OpType::OpTrue),
make(OpType::OpJumpNotTruthy, 10),
make(OpType::OpConstant, 0),
make(OpType::OpJump, 13),
make(OpType::OpConstant, 1),
make(OpType::OpPop),
make(OpType::OpConstant, 2),
make(OpType::OpPop),
}),
};
for (const auto &tt: tests) {
const auto [tt_input, tt_expected_constants, tt_expected_instructions] = tt;
auto program = parse(tt_input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(tt_expected_instructions, bytecode->instructions));
REQUIRE(test_integer_constants(tt_expected_constants, bytecode->constants));
}
}
TEST_CASE("Test Global Let Statements") {
std::vector<std::tuple<std::string, std::vector<int>, std::vector<Instructions>>> tests = {
std::make_tuple(R"(
let one = 1;
let two = 2;
)", std::vector<int>{1, 2}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpSetGlobal, 0),
make(OpType::OpConstant, 1),
make(OpType::OpSetGlobal, 1),
}),
std::make_tuple(R"(
let one = 1;
one;
)", std::vector<int>{1}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpSetGlobal, 0),
make(OpType::OpGetGlobal, 0),
make(OpType::OpPop),
}),
std::make_tuple(R"(
let one = 1;
let two = one;
two;
)", std::vector<int>{1}, std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpSetGlobal, 0),
make(OpType::OpGetGlobal, 0),
make(OpType::OpSetGlobal, 1),
make(OpType::OpGetGlobal, 1),
make(OpType::OpPop),
}),
};
for (const auto &tt: tests) {
const auto [tt_input, tt_expected_constants, tt_expected_instructions] = tt;
auto program = parse(tt_input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(tt_expected_instructions, bytecode->instructions));
REQUIRE(test_integer_constants(tt_expected_constants, bytecode->constants));
}
}
TEST_CASE("Test String Expressions") {
std::vector<std::tuple<std::string, std::vector<std::string>, std::vector<Instructions>>> tests = {
std::make_tuple(
R"("monkey")",
std::vector<std::string>{"monkey"},
std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpPop),
}),
std::make_tuple(
R"("mon" + "key")",
std::vector<std::string>{"mon", "key"},
std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpAdd),
make(OpType::OpPop),
}),
};
for (const auto &tt: tests) {
const auto [tt_input, tt_expected_constants, tt_expected_instructions] = tt;
auto program = parse(tt_input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(tt_expected_instructions, bytecode->instructions));
REQUIRE(test_string_constants(tt_expected_constants, bytecode->constants));
}
}
TEST_CASE("Test Array Literals") {
std::vector<std::tuple<std::string, std::vector<int>, std::vector<Instructions>>> tests = {
std::make_tuple("[]", std::vector<int>{},
std::vector<Instructions>{
make(OpType::OpArray, 0),
make(OpType::OpPop),
}),
std::make_tuple("[1, 2, 3]", std::vector<int>{1, 2, 3},
std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpConstant, 2),
make(OpType::OpArray, 3),
make(OpType::OpPop),
}),
std::make_tuple("[1 + 2, 3 - 4, 5 * 6]", std::vector<int>{1, 2, 3, 4, 5, 6},
std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpAdd),
make(OpType::OpConstant, 2),
make(OpType::OpConstant, 3),
make(OpType::OpSub),
make(OpType::OpConstant, 4),
make(OpType::OpConstant, 5),
make(OpType::OpMul),
make(OpType::OpArray, 3),
make(OpType::OpPop),
}),
};
for (const auto &tt: tests) {
const auto [tt_input, tt_expected_constants, tt_expected_instructions] = tt;
auto program = parse(tt_input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(tt_expected_instructions, bytecode->instructions));
REQUIRE(test_integer_constants(tt_expected_constants, bytecode->constants));
}
}
TEST_CASE("Test Hash Literals") {
std::vector<std::tuple<std::string, std::vector<int>, std::vector<Instructions>>> tests = {
std::make_tuple("{}", std::vector<int>{},
std::vector<Instructions>{
make(OpType::OpHash, 0),
make(OpType::OpPop),
}),
std::make_tuple("{1: 2, 3: 4, 5: 6}", std::vector<int>{1, 2, 3, 4, 5, 6},
std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpConstant, 2),
make(OpType::OpConstant, 3),
make(OpType::OpConstant, 4),
make(OpType::OpConstant, 5),
make(OpType::OpHash, 6),
make(OpType::OpPop),
}),
std::make_tuple("{1: 2 + 3, 4: 5 * 6}", std::vector<int>{1, 2, 3, 4, 5, 6},
std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpConstant, 2),
make(OpType::OpAdd),
make(OpType::OpConstant, 3),
make(OpType::OpConstant, 4),
make(OpType::OpConstant, 5),
make(OpType::OpMul),
make(OpType::OpHash, 4),
make(OpType::OpPop),
}),
};
for (const auto &tt: tests) {
const auto [tt_input, tt_expected_constants, tt_expected_instructions] = tt;
auto program = parse(tt_input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(tt_expected_instructions, bytecode->instructions));
REQUIRE(test_integer_constants(tt_expected_constants, bytecode->constants));
}
}
TEST_CASE("Test Index Expressions") {
std::vector<std::tuple<std::string, std::vector<int>, std::vector<Instructions>>> tests = {
std::make_tuple("[1, 2, 3][1 + 1]", std::vector<int>{1, 2, 3, 1, 1},
std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpConstant, 2),
make(OpType::OpArray, 3),
make(OpType::OpConstant, 3),
make(OpType::OpConstant, 4),
make(OpType::OpAdd),
make(OpType::OpIndex),
make(OpType::OpPop),
}),
std::make_tuple("{1: 2}[2 - 1]", std::vector<int>{1, 2, 2, 1},
std::vector<Instructions>{
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpHash, 2),
make(OpType::OpConstant, 2),
make(OpType::OpConstant, 3),
make(OpType::OpSub),
make(OpType::OpIndex),
make(OpType::OpPop),
}),
};
for (const auto &tt: tests) {
const auto [tt_input, tt_expected_constants, tt_expected_instructions] = tt;
auto program = parse(tt_input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(tt_expected_instructions, bytecode->instructions));
REQUIRE(test_integer_constants(tt_expected_constants, bytecode->constants));
}
}
TEST_CASE("Test Compiler Scopes") {
EmittedInstruction last;
EmittedInstruction previous;
auto compiler = new_compiler();
if (compiler->scope_index != 0) {
std::cerr << "scope_index wrong. got=" << compiler->scope_index << ", want=" << 0 << std::endl;
}
REQUIRE(compiler->scope_index == 0);
auto global_symbol_table = compiler->symbol_table;
compiler->emit(OpType::OpMul);
compiler->enter_scope();
if (compiler->scope_index != 1) {
std::cerr << "scope_index wrong. got=" << compiler->scope_index << ", want=" << 1 << std::endl;
}
REQUIRE(compiler->scope_index == 1);
compiler->emit(OpType::OpSub);
if (compiler->scopes.at(compiler->scope_index).instructions.size() != 1) {
std::cerr << "instructions length wrong. got="
<< compiler->scopes.at(compiler->scope_index).instructions.size() << std::endl;
}
REQUIRE(compiler->scopes.at(compiler->scope_index).instructions.size() == 1);
last = compiler->scopes.at(compiler->scope_index).last_instruction;
if (last.opcode != OpType::OpSub) {
std::cerr << "last_instruction.opcode wrong. got=" << std::to_string(static_cast<int>(as_opcode(last.opcode)))
<< ", want=" << std::to_string(static_cast<int>(as_opcode(OpType::OpSub))) << std::endl;
}
REQUIRE(last.opcode == OpType::OpSub);
if (compiler->symbol_table->outer != global_symbol_table) {
std::cerr << "compiler did not enclose symbol table" << std::endl;
}
REQUIRE(compiler->symbol_table->outer == global_symbol_table);
compiler->leave_scope();
if (compiler->scope_index != 0) {
std::cerr << "scope_index wrong. got=" << compiler->scope_index << ", want=" << 0 << std::endl;
}
REQUIRE(compiler->scope_index == 0);
if (compiler->symbol_table != global_symbol_table) {
std::cerr << "compiler did not restore global symbol table" << std::endl;
}
REQUIRE(compiler->symbol_table == global_symbol_table);
if (compiler->symbol_table->outer) {
std::cerr << "compiler modified global symbol table incorrectly" << std::endl;
}
REQUIRE(!compiler->symbol_table->outer);
compiler->emit(OpType::OpAdd);
if (compiler->scopes.at(compiler->scope_index).instructions.size() != 2) {
std::cerr << "instructions length wrong. got="
<< compiler->scopes.at(compiler->scope_index).instructions.size() << std::endl;
}
REQUIRE(compiler->scopes.at(compiler->scope_index).instructions.size() == 2);
last = compiler->scopes.at(compiler->scope_index).last_instruction;
if (last.opcode != OpType::OpAdd) {
std::cerr << "last_instruction.opcode wrong. got=" << std::to_string(static_cast<int>(as_opcode(last.opcode)))
<< ", want=" << std::to_string(static_cast<int>(as_opcode(OpType::OpAdd))) << std::endl;
}
REQUIRE(last.opcode == OpType::OpAdd);
previous = compiler->scopes.at(compiler->scope_index).previous_instruction;
if (previous.opcode != OpType::OpMul) {
std::cerr << "previous_instruction.opcode wrong. got=" << std::to_string(static_cast<int>(as_opcode(previous.opcode)))
<< ", want=" << std::to_string(static_cast<int>(as_opcode(OpType::OpMul))) << std::endl;
}
REQUIRE(previous.opcode == OpType::OpMul);
}
TEST_CASE("Test Function With Return") {
std::string input = "fn() { return 5 + 10 }";
std::vector<int> expected_integer_constants = std::vector<int>{5, 10};
std::vector<Instructions> expected_fn_instructions = {
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpAdd),
make(OpType::OpReturnValue),
};
std::vector<Instructions> expected_instructions = {
make(OpType::OpClosure, 2, 0),
make(OpType::OpPop),
};
auto program = parse(input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(expected_instructions, bytecode->instructions));
// Test integer constants
auto int_constants = std::vector<std::shared_ptr<Object>>(bytecode->constants.begin(), bytecode->constants.end() - 1);
REQUIRE(test_integer_constants(expected_integer_constants, int_constants));
// Test compiled function constants
auto fn_constants = bytecode->constants.back();
REQUIRE(test_function_constants(expected_fn_instructions, fn_constants));
}
TEST_CASE("Test Function With No Return") {
std::string input = "fn() { 5 + 10 }";
std::vector<int> expected_integer_constants = std::vector<int>{5, 10};
std::vector<Instructions> expected_fn_instructions = {
make(OpType::OpConstant, 0),
make(OpType::OpConstant, 1),
make(OpType::OpAdd),
make(OpType::OpReturnValue),
};
std::vector<Instructions> expected_instructions = {
make(OpType::OpClosure, 2, 0),
make(OpType::OpPop),
};
auto program = parse(input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(expected_instructions, bytecode->instructions));
// Test integer constants
auto int_constants = std::vector<std::shared_ptr<Object>>(bytecode->constants.begin(), bytecode->constants.end() - 1);
REQUIRE(test_integer_constants(expected_integer_constants, int_constants));
// Test compiled function constants
auto fn_constants = bytecode->constants.back();
REQUIRE(test_function_constants(expected_fn_instructions, fn_constants));
}
TEST_CASE("Test Function With No Return And Two Expression Statements") {
std::string input = "fn() { 1; 2 }";
std::vector<int> expected_integer_constants = std::vector<int>{1, 2};
std::vector<Instructions> expected_fn_instructions = {
make(OpType::OpConstant, 0),
make(OpType::OpPop),
make(OpType::OpConstant, 1),
make(OpType::OpReturnValue),
};
std::vector<Instructions> expected_instructions = {
make(OpType::OpClosure, 2, 0),
make(OpType::OpPop),
};
auto program = parse(input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(expected_instructions, bytecode->instructions));
// Test integer constants
auto int_constants = std::vector<std::shared_ptr<Object>>(bytecode->constants.begin(), bytecode->constants.end() - 1);
REQUIRE(test_integer_constants(expected_integer_constants, int_constants));
// Test compiled function constants
auto fn_constants = bytecode->constants.back();
REQUIRE(test_function_constants(expected_fn_instructions, fn_constants));
}
TEST_CASE("Test Function With No Return Value") {
std::string input = "fn() { }";
std::vector<Instructions> expected_fn_instructions = {
make(OpType::OpReturn),
};
std::vector<Instructions> expected_instructions = {
make(OpType::OpClosure, 0, 0),
make(OpType::OpPop),
};
auto program = parse(input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(expected_instructions, bytecode->instructions));
// Test compiled function constants
auto fn_constants = bytecode->constants.back();
REQUIRE(test_function_constants(expected_fn_instructions, fn_constants));
}
TEST_CASE("Test Function Calls") {
std::string input = "fn() { 24 }()";
std::vector<int> expected_integer_constants = std::vector<int>{24};
std::vector<Instructions> expected_fn_instructions = {
make(OpType::OpConstant, 0), // The literal "24"
make(OpType::OpReturnValue),
};
std::vector<Instructions> expected_instructions = {
make(OpType::OpClosure, 1, 0), // The compiled function
make(OpType::OpCall, 0),
make(OpType::OpPop),
};
auto program = parse(input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(expected_instructions, bytecode->instructions));
// Test integer constants
auto int_constants = std::vector<std::shared_ptr<Object>>(bytecode->constants.begin(), bytecode->constants.end() - 1);
REQUIRE(test_integer_constants(expected_integer_constants, int_constants));
// Test compiled function constants
auto fn_constants = bytecode->constants.back();
REQUIRE(test_function_constants(expected_fn_instructions, fn_constants));
}
TEST_CASE("Test Function Calls With Binding") {
std::string input = R"(
let noArg = fn() { 24 };
noArg();
)";
std::vector<int> expected_integer_constants = std::vector<int>{24};
std::vector<Instructions> expected_fn_instructions = {
make(OpType::OpConstant, 0), // The literal "24"
make(OpType::OpReturnValue),
};
std::vector<Instructions> expected_instructions = {
make(OpType::OpClosure, 1, 0), // The compiled function
make(OpType::OpSetGlobal, 0),
make(OpType::OpGetGlobal, 0),
make(OpType::OpCall, 0),
make(OpType::OpPop),
};
auto program = parse(input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(expected_instructions, bytecode->instructions));
// Test integer constants
auto int_constants = std::vector<std::shared_ptr<Object>>(bytecode->constants.begin(), bytecode->constants.end() - 1);
REQUIRE(test_integer_constants(expected_integer_constants, int_constants));
// Test compiled function constants
auto fn_constants = bytecode->constants.back();
REQUIRE(test_function_constants(expected_fn_instructions, fn_constants));
}
TEST_CASE("Test Let Statement Scopes 1") {
std::string input = R"(
let num = 55;
fn() { num }
)";
std::vector<int> expected_integer_constants = std::vector<int>{55};
std::vector<Instructions> expected_fn_instructions = {
make(OpType::OpGetGlobal, 0),
make(OpType::OpReturnValue),
};
std::vector<Instructions> expected_instructions = {
make(OpType::OpConstant, 0),
make(OpType::OpSetGlobal, 0),
make(OpType::OpClosure, 1, 0),
make(OpType::OpPop),
};
auto program = parse(input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(expected_instructions, bytecode->instructions));
// Test integer constants
auto int_constants = std::vector<std::shared_ptr<Object>>(bytecode->constants.begin(), bytecode->constants.end() - 1);
REQUIRE(test_integer_constants(expected_integer_constants, int_constants));
// Test compiled function constants
auto fn_constants = bytecode->constants.back();
REQUIRE(test_function_constants(expected_fn_instructions, fn_constants));
}
TEST_CASE("Test Let Statement Scopes 2") {
std::string input = R"(
fn() {
let num = 55;
num
}
)";
std::vector<int> expected_integer_constants = std::vector<int>{55};
std::vector<Instructions> expected_fn_instructions = {
make(OpType::OpConstant, 0),
make(OpType::OpSetLocal, 0),
make(OpType::OpGetLocal, 0),
make(OpType::OpReturnValue),
};
std::vector<Instructions> expected_instructions = {
make(OpType::OpClosure, 1, 0),
make(OpType::OpPop),
};
auto program = parse(input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(expected_instructions, bytecode->instructions));
// Test integer constants
auto int_constants = std::vector<std::shared_ptr<Object>>(bytecode->constants.begin(), bytecode->constants.end() - 1);
REQUIRE(test_integer_constants(expected_integer_constants, int_constants));
// Test compiled function constants
auto fn_constants = bytecode->constants.back();
REQUIRE(test_function_constants(expected_fn_instructions, fn_constants));
}
TEST_CASE("Test Let Statement Scopes 3") {
std::string input = R"(
fn() {
let a = 55;
let b = 77;
a + b
}
)";
std::vector<int> expected_integer_constants = std::vector<int>{55, 77};
std::vector<Instructions> expected_fn_instructions = {
make(OpType::OpConstant, 0),
make(OpType::OpSetLocal, 0),
make(OpType::OpConstant, 1),
make(OpType::OpSetLocal, 1),
make(OpType::OpGetLocal, 0),
make(OpType::OpGetLocal, 1),
make(OpType::OpAdd),
make(OpType::OpReturnValue),
};
std::vector<Instructions> expected_instructions = {
make(OpType::OpClosure, 2, 0),
make(OpType::OpPop),
};
auto program = parse(input);
auto compiler = new_compiler();
auto err = compiler->compile(program);
if (err) {
std::cerr << "compiler error: " << err->message << std::endl;
}
REQUIRE(!err);
auto bytecode = compiler->bytecode();
REQUIRE(test_instructions(expected_instructions, bytecode->instructions));
// Test integer constants
auto int_constants = std::vector<std::shared_ptr<Object>>(bytecode->constants.begin(), bytecode->constants.end() - 1);
REQUIRE(test_integer_constants(expected_integer_constants, int_constants));
// Test compiled function constants
auto fn_constants = bytecode->constants.back();
REQUIRE(test_function_constants(expected_fn_instructions, fn_constants));
}
TEST_CASE("Test Function Calls With One Argument") {
std::string input = R"(
let oneArg = fn(a) { a };
oneArg(24);
)";
std::vector<int> expected_integer_constants = std::vector<int>{24};
std::vector<Instructions> expected_fn_instructions = {
make(OpType::OpGetLocal, 0),
make(OpType::OpReturnValue),
};
std::vector<Instructions> expected_instructions = {
make(OpType::OpClosure, 0, 0),
make(OpType::OpSetGlobal, 0),
make(OpType::OpGetGlobal, 0),
make(OpType::OpConstant, 1),
make(OpType::OpCall, 1),
make(OpType::OpPop),
};
auto program = parse(input);