feat: print variable values when entered in REPL shell

src/utils/break_lines.cpp

@@ -7,16 +7,26 @@ std::vector<std::string> break_lines(const std::string &input) {
  std::stack<char> brackets_stack;
 
  for (auto c: input) {
- current_line.push_back(c);
- if (c == '(') {
- brackets_stack.push(c);
- } else if (c == ')') {
- brackets_stack.pop();
- if (brackets_stack.empty()) {
+ if (c == ' ' && brackets_stack.empty()) {
+ if (!current_line.empty()) {
  result.push_back(current_line);
- current_line = "";
+ current_line.clear();
+ }
+ } else {
+ current_line.push_back(c);
+ if (c == '(') {
+ brackets_stack.push(c);
+ } else if (c == ')') {
+ brackets_stack.pop();
+ if (brackets_stack.empty()) {
+ result.push_back(current_line);
+ current_line.clear();
+ }
  }
  }
  }
+ if (!current_line.empty()) {
+ result.push_back(current_line);
+ }
  return result;
 }

tests/variables_test.cpp

@@ -35,6 +35,26 @@ TEST(variables_test, ShouldDefineAVariableWithAnExpression) {
  EXPECT_EQ(actual_result, expected_result);
 }
 
+TEST(variables_test, ShouldDisplayAVariableValueWhenCalled) {
+ const auto program =
+ "(define x 10)"
+ "x";
+
+ const auto expected_result = StackObject((double) 10);
+ const auto actual_result = run_program(program);
+
+ EXPECT_EQ(actual_result, expected_result);
+}
+
+TEST(variables_test, ShouldDisplayALiteralWhenItsCalled) {
+ const auto program = "10";
+
+ const auto expected_result = StackObject((double) 10);
+ const auto actual_result = run_program(program);
+
+ EXPECT_EQ(actual_result, expected_result);
+}
+
 TEST(variables_test, ShouldThrowAnErrorOnUndefinedVariable) {
  const auto program = "(+ x 10)";
 
@@ -43,7 +63,7 @@ TEST(variables_test, ShouldThrowAnErrorOnUndefinedVariable) {
 
  try {
  run_program(program);
- } catch (const SyntaxError& e) {
+ } catch (const SyntaxError &e) {
  errorIsThrown = true;
  errorMessage = e.message;
  }