refactor: turn MyString into a production-grade C++17 library

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: C++ CI
+
+on:
+  push:
+    branches: [main, feature/production-grade-mystring]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Configure
+        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug
+
+      - name: Build
+        run: cmake --build build --parallel
+
+      - name: Test
+        run: ctest --test-dir build --output-on-failure
+
+      - name: Sanitizer build
+        run: |
+          cmake -S . -B build-asan -DCMAKE_BUILD_TYPE=Debug \
+            -DCMAKE_CXX_FLAGS="-fsanitize=address,undefined -fno-omit-frame-pointer"
+          cmake --build build-asan --parallel
+          ctest --test-dir build-asan --output-on-failure

.gitignore

@@ -1,18 +1,21 @@
-# Build files
-*.exe
-*.out
+# Build artifacts
+build/
+build-*/
+CMakeFiles/
+CMakeCache.txt
+cmake_install.cmake
+Makefile
 *.o
 *.obj
+*.out
+*.exe
 
-# Visual Studio Code
+# IDE files
 .vscode/
+.idea/
+*.user
+*.suo
 
-# Debug files
+# Debug / compiler artifacts
 *.pdb
 *.ilk
-
-# CMake
-CMakeFiles/
-CMakeCache.txt
-cmake_install.cmake
-Makefile

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.16)
+
+project(MyString VERSION 1.0.0 LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+add_library(mystring src/MyString.cpp)
+target_include_directories(mystring PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)
+target_compile_options(mystring PRIVATE
+    $<$<CXX_COMPILER_ID:GNU,Clang>:-Wall;-Wextra;-Wpedantic>
+    $<$<CXX_COMPILER_ID:MSVC>:/W4>
+)
+
+add_executable(mystring_demo examples/main.cpp)
+target_link_libraries(mystring_demo PRIVATE mystring)
+
+include(CTest)
+if(BUILD_TESTING)
+    add_executable(mystring_tests tests/test_mystring.cpp)
+    target_link_libraries(mystring_tests PRIVATE mystring)
+    add_test(NAME MyStringTests COMMAND mystring_tests)
+endif()

LICENSE

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+MIT License
+
+Copyright (c) 2026 Jyatin Kumar Singh
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.