feat: range based for

chapters/chapter_02/CMakeLists.txt

@@ -1,12 +1,13 @@
 add_library(
   chapter_02
+  src/constexp.cpp
+  src/if_constexpr.cpp
+  src/ifswitch.cpp
   src/initlist.cpp
   src/null.cpp
-  src/constexp.cpp
-  src/ifswitch.cpp
+  src/range_based_for.cpp
   src/structured_binding.cpp
-  src/type_inference.cpp
-  src/if_constexpr.cpp)
+  src/type_inference.cpp)
 
 target_compile_features(chapter_02 PUBLIC cxx_std_20)
 

chapters/chapter_02/include/range_based_for.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include "chapter_interface.h"
+
+class RangeBasedForTest : public ChapterTest {
+public:
+  virtual void run() override;
+  virtual const char *name() const override { return "Range based for test"; }
+};

chapters/chapter_02/src/range_based_for.cpp

@@ -0,0 +1,24 @@
+#include <iostream>
+#include <vector>
+
+#include "range_based_for.h"
+
+void RangeBasedForTest::run() {
+  std::vector<int> vals = {1, 2, 3, 4, 5};
+
+  std::cout << "vals: ";
+  for (auto val : vals) {
+    std::cout << val << " ";
+  }
+  std::cout << std::endl;
+
+  for (auto &val : vals) {
+    val *= 2;
+  }
+
+  std::cout << "vals: ";
+  for (auto val : vals) {
+    std::cout << val << " ";
+  }
+  std::cout << std::endl;
+}

src/main.cpp

@@ -8,6 +8,7 @@
 #include "ifswitch.h"
 #include "initlist.h"
 #include "null.h"
+#include "range_based_for.h"
 #include "structured_binding.h"
 #include "type_inference.h"
 #include "version.h"
@@ -26,6 +27,7 @@ int main(int argc, char **argv) {
   chapter_2_tests.emplace_back(std::make_unique<StructuredBindingTest>());
   chapter_2_tests.emplace_back(std::make_unique<TypeInferenceTest>());
   chapter_2_tests.emplace_back(std::make_unique<IfConstexprTest>());
+  chapter_2_tests.emplace_back(std::make_unique<RangeBasedForTest>());
 
   for (auto &test : chapter_2_tests) {
     std::cout << "\n" << test->name() << ":" << std::endl;