log-args-runtime

log-args-runtime is a lightweight runtime support crate for the log-args procedural macro. It provides thread-local storage and context management for structured logging spans and arguments.

Purpose

This crate is not intended for direct use by end users. Instead, it is used internally by code generated by the log-args macro to propagate contextual information (such as parent spans) at runtime.

Usage

You generally do not need to depend on log-args-runtime directly. It is used automatically when you use the log-args macro in your code. However, if you are developing custom integrations or want to interact with the runtime context, you can use the following API:

use log_args_runtime::__PARENT_LOG_ARGS;

// Example: setting and retrieving the parent log context
__PARENT_LOG_ARGS.with(|parent| {
    *parent.borrow_mut() = Some("parent-context".to_string());
});

__PARENT_LOG_ARGS.with(|parent| {
    if let Some(ctx) = &*parent.borrow() {
        println!("Current parent context: {}", ctx);
    }
});

How it Works

• The crate exposes a thread-local variable __PARENT_LOG_ARGS which stores an optional string representing the parent log context.
• This is used by the macro-generated code to propagate span or context information across function boundaries.

License

See the main repository for license information.