Crate arpa_log

Expand description

As an attribute macro, log_function will

Automatically log the name, input and return value of current function at debug level before it returns by trying to recognize return stmt and inserting a debug! stmt.
Set the name of current function as a key in mdc at the beginning of the function and remove it before the function returns.

Note:

Input and return type need to implement Debug.
When dealing with async function, using #![feature(async_fn_in_trait)] is recommended. Also this is compatible with #[async_trait].
To protect secrets, input and return values are ignored by default. You can specify whether to print all values, or a subset of them with semantic literal options. For example:
```
use arpa_log::*;

#[log_function("show-input", "except foo bar", "show-return")]
fn show_subset_of_input_and_return_value(foo: usize, bar: usize, baz: usize) -> usize {
   foo + bar + baz
}
```
Then the log should be: {“message”:“LogModel { fn_name: "show_subset_of_input_and_return_value", fn_args: ["foo: ignored", "bar: ignored", "baz: 3"], fn_return: "6" }”,“level”:“DEBUG”, “target”:“show_subset_of_input_and_return_value”,“mdc”:{“fn_name”:“show_subset_of_input_and_return_value”}} with test logger.

Note: Logging result can be different with different logger implementation.

Re-exports§