Enable C++20 support

addon/addon.cc

@@ -1,5 +1,6 @@
 #include <map>
 #include <memory>
+#include <ranges>
 #include <stack>
 #include <string>
 #include <utility>
@@ -252,9 +253,9 @@ class GNDocument {
         continue;
       }
       if (const auto* block = node->AsBlock()) {
-        for (auto item = block->statements().rbegin();
-             item != block->statements().rend(); item++) {
-          nodes.push(item->get());
+        for (const auto& item :
+             std::ranges::reverse_view(block->statements())) {
+          nodes.push(item.get());
         }
       } else if (const auto* condition = node->AsCondition()) {
         nodes.push(condition->if_false());

addon/binding.gyp

@@ -19,7 +19,7 @@
       '<(rootdir)/gn/out/<(target_arch)/gn_lib<(STATIC_LIB_SUFFIX)',
     ],
     'cflags_cc': [
-      '-std=c++17',
+      '-std=c++20',
       '-Wall',
       '-Wextra',
       '-Werror',
@@ -37,7 +37,7 @@
       }],
       ['OS=="mac"', {
         'xcode_settings': {
-          'CLANG_CXX_LANGUAGE_STANDARD': 'c++17',
+          'CLANG_CXX_LANGUAGE_STANDARD': 'c++20',
           'GCC_TREAT_WARNINGS_AS_ERRORS': 'YES',
           'OTHER_CPLUSPLUSFLAGS': [
             '$(inherited)',
@@ -57,7 +57,7 @@
               '4127',
             ],
             'AdditionalOptions': [
-              '-std:c++17',
+              '-std:c++20',
             ],
           },
         },