Save vscode configs

.gitignore

@@ -1,7 +1,5 @@
-.vscode
 merlin
 Makefile
 CMakeFiles
 cmake_install.cmake
-CMakeCache.txt
-build
+CMakeCache.txt

.vscode/c_cpp_properties.json

@@ -0,0 +1,22 @@
+{
+    "configurations": [
+        {
+            "name": "MinGW",
+            "compilerPath": "/usr/bin/g++",
+            "includePath": [
+                "${workspaceFolder}"
+            ],
+            "intelliSenseMode": "clang-x64",
+            "browse": {
+                "path": [
+                    "${workspaceFolder}"
+                ],
+                "limitSymbolsToIncludedHeaders": true,
+                "databaseFilename": ""
+            },
+            "cStandard": "c11",
+            "cppStandard": "c++23"
+        }
+    ],
+    "version": 4
+}

.vscode/settings.json

@@ -0,0 +1,53 @@
+{
+    "C_Cpp.default.cppStandard": "c++23",
+    "files.associations": {
+        "*.yml": "yaml",
+        "iostream": "cpp",
+        "array": "cpp",
+        "atomic": "cpp",
+        "bit": "cpp",
+        "*.tcc": "cpp",
+        "cctype": "cpp",
+        "clocale": "cpp",
+        "cmath": "cpp",
+        "compare": "cpp",
+        "concepts": "cpp",
+        "cstdarg": "cpp",
+        "cstddef": "cpp",
+        "cstdint": "cpp",
+        "cstdio": "cpp",
+        "cstdlib": "cpp",
+        "cwchar": "cpp",
+        "cwctype": "cpp",
+        "deque": "cpp",
+        "string": "cpp",
+        "unordered_map": "cpp",
+        "vector": "cpp",
+        "exception": "cpp",
+        "algorithm": "cpp",
+        "functional": "cpp",
+        "iterator": "cpp",
+        "memory": "cpp",
+        "memory_resource": "cpp",
+        "numeric": "cpp",
+        "random": "cpp",
+        "string_view": "cpp",
+        "system_error": "cpp",
+        "tuple": "cpp",
+        "type_traits": "cpp",
+        "utility": "cpp",
+        "initializer_list": "cpp",
+        "iosfwd": "cpp",
+        "istream": "cpp",
+        "limits": "cpp",
+        "new": "cpp",
+        "numbers": "cpp",
+        "ostream": "cpp",
+        "stdexcept": "cpp",
+        "streambuf": "cpp",
+        "typeinfo": "cpp",
+        "sstream": "cpp",
+        "fstream": "cpp",
+        "optional": "cpp"
+    },
+}

src/parser/parser.cpp

@@ -68,12 +68,12 @@ class Parser {
     std::optional<std::unique_ptr<Node>> atomic() {
         switch (this->current.type) {
             case (lexer::TokenType::INTEGER): {
-
+                return std::nullopt;
             }
             default: {
+                return std::nullopt;
             }
         }
-        return std::nullopt;
     }
 
     std::unique_ptr<Node> expr() {