Init

.envrc

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+use flake

.gitignore

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+build/
+.cache/
+.direnv/

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.31)
+project(
+  cpp_experiments
+  VERSION 1.0
+  LANGUAGES CXX)
+
+set(CMAKE_EXPORT_COMPILE_COMMANDS true)
+set(CMAKE_CXX_STANDARD 23)
+
+add_subdirectory(src)

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 0,
+        "narHash": "sha256-F7n4+KOIfWrwoQjXrL2wD9RhFYLs2/GGe/MQY1sSdlE=",
+        "path": "/nix/store/fwhfa9pbx8vdi8nd5pcys665baz6xdxf-source",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "C/C++ environment";
+
+  # inputs.nixpkgs.url = "nixpkgs";
+
+  outputs = { nixpkgs, ... }: {
+    devShells.x86_64-linux.default = nixpkgs.legacyPackages.x86_64-linux.mkShell {
+      name = "C_CPP-devshell";
+      packages = with nixpkgs.legacyPackages.x86_64-linux; [
+        clang-tools
+        cmake
+        cmake-language-server
+      ];
+    };
+  };
+}

src/CMakeLists.txt

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+add_executable(Hello helloWorld.cpp)

src/helloWorld.cpp

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+#include <iostream>
+
+int main() {
+  std::cout << "Hello world!";
+  return 0;
+}