Summary

Create C++20 module files for logger_system as part of the Tier 2 libraries.

Parent Epic

Part of kcenon/common_system#256 (C++20 Module Migration - Cross-System Preparation)

Prerequisites

• Remove unnecessary factories ([REFACTOR] Remove unnecessary factories - C++20 Module preparation #274)
• [MODULE] Create C++20 module files for kcenon.common common_system#269 - common_system module (Tier 0)
• [MODULE] Create C++20 module files for kcenon.thread thread_system#371 - thread_system module (Tier 1, optional)

Proposed Module Structure

// Primary module interface
export module kcenon.logger;

import kcenon.common;           // Required
import kcenon.thread;           // Optional

export import kcenon.logger.core;
export import kcenon.logger.backends;
export import kcenon.logger.analysis;

Module Partitions

File Structure

src/modules/
├── logger.cppm              # Primary module interface
├── core.cppm                # Core partition
├── backends.cppm            # Backends partition
└── analysis.cppm            # Analysis partition

CMake Configuration

cmake_minimum_required(VERSION 3.28)
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_SCAN_FOR_MODULES ON)

add_library(kcenon_logger)
target_sources(kcenon_logger
    PRIVATE FILE_SET CXX_MODULES
    FILES
        src/modules/logger.cppm
        src/modules/core.cppm
        src/modules/backends.cppm
        src/modules/analysis.cppm
)

Tasks

• Complete factory removal ([REFACTOR] Remove unnecessary factories - C++20 Module preparation #274) first
• Wait for common_system module (Tier 0) completion
• Create module directory structure
• Create logger.cppm primary interface
• Create partition files
• Update CMakeLists.txt for module support
• Verify no circular module dependencies
• Update all tests to use modules
• Update documentation

Acceptance Criteria

• Module builds successfully with CMake 3.28+
• Successfully imports kcenon.common module
• All existing tests pass with module
• No circular dependencies
• Header-based build still works (transition period)

Migration Timeline

This is Phase 2 work (Release N+4) per EPIC:

• Blocked by: Tier 0/1 modules, factory removal

Related

• C++20 Module Migration Epic ([EPIC] C++20 Module Migration - Cross-System Preparation common_system#256)
• Remove unnecessary factories ([REFACTOR] Remove unnecessary factories - C++20 Module preparation #274) - prerequisite