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", so this trait is not object safe.

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