Trait snafu::GenerateImplicitData

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

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

Expand description

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

Required Methods

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fn generate() -> Self

Build the data.

Provided Methods

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

Build the data using the given source

Implementations on Foreign Types

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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.

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