Trait GenerateImplicitData

pub trait GenerateImplicitData {
    // Required method
    fn generate() -> Self;

    // Provided method
    fn generate_with_source(source: &dyn Error) -> Self
       where Self: Sized { ... }
}

Construct data to be included as part of an error. The data must require no arguments to be created.

Required Methods

fn generate() -> Self

Build the data.

Provided Methods

fn generate_with_source(source: &dyn Error) -> Self

where Self: Sized,

Build the data using the given source

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 GenerateImplicitData for Option<Backtrace>

Only create a backtrace when an environment variable is set.

This looks first for the value of RUST_LIB_BACKTRACE then RUST_BACKTRACE. If the value is set to 1, backtraces will be enabled.

This value will be tested only once per program execution; changing the environment variable after it has been checked will have no effect.

Interaction with the Provider API

If you enable the unstable-provider-api feature flag, a backtrace will not be captured if the original error is able to provide a Backtrace, even if the appropriate environment variables are set. This prevents capturing a redundant backtrace.

fn generate() -> Self

fn generate_with_source(source: &dyn Error) -> Self

Implementors

impl GenerateImplicitData for Backtrace

impl GenerateImplicitData for Location