Trait OptionContext 

pub trait OptionContext<T> {
    // Required methods
    fn context_none(self, context: impl Into<String>) -> Result<T>;
    fn with_context_none<F, C>(self, f: F) -> Result<T>
       where F: FnOnce() -> C,
             C: Into<String>;
}

Extension trait for Option types to convert to errors with context.

Required Methods

fn context_none(self, context: impl Into<String>) -> Result<T>

Convert None to an error with the given context.

fn with_context_none<F, C>(self, f: F) -> Result<T>

where F: FnOnce() -> C, C: Into<String>,

Convert None to an error with context from a closure.

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> OptionContext<T> for Option<T>

fn context_none(self, context: impl Into<String>) -> Result<T>

fn with_context_none<F, C>(self, f: F) -> Result<T>

where F: FnOnce() -> C, C: Into<String>,

Implementors