Trait OptionPrinter 

pub trait OptionPrinter {
    // Required methods
    fn error_none<M: Display>(self, message: M) -> Self;
    fn warn_none<M: Display>(self, message: M) -> Self;
    fn debug_none<M: Display>(self, message: M) -> Self;
    fn info_none<M: Display>(self, message: M) -> Self;
}

A helper trait to log when an option is None. The logging functions will track the caller’s callsite. For a chain of calls A -> B -> C -> OptionPrinter, the topmost function without #[track_caller] is deemed the callsite.

Required Methods

fn error_none<M: Display>(self, message: M) -> Self

fn warn_none<M: Display>(self, message: M) -> Self

fn debug_none<M: Display>(self, message: M) -> Self

fn info_none<M: Display>(self, message: M) -> Self

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T> OptionPrinter for Option<T>

fn error_none<M: Display>(self, message: M) -> Self

If self is None, prints out the message to tracing::error.

fn warn_none<M: Display>(self, message: M) -> Self

If self is None, prints out the message to tracing::warn.

fn debug_none<M: Display>(self, message: M) -> Self

If self is None, prints out the message to tracing::debug.

fn info_none<M: Display>(self, message: M) -> Self

If self is None, prints out the message to tracing::info.

Implementors