Struct EngineConfig 

#[non_exhaustive]
pub struct EngineConfig {
    pub observer: Option<Arc<dyn Observer>>,
    pub error_context: Option<ErrorContext>,
    pub condition_error_policy: ConditionErrorPolicy,
}

What an Engine is configured with beside its program. A reload, Engine::with_program, keeps it.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

observer: Option<Arc<dyn Observer>>

The observer every run of the engine reports to, beside a run’s own (RunOptions::observer). None by default.

error_context: Option<ErrorContext>

Where the records of each call that added any are mirrored in the context, and how many are kept. None by default: nothing is mirrored, and nothing is reset at run start.

condition_error_policy: ConditionErrorPolicy

Engine-wide default for how condition evaluation errors are handled when RunOptions::condition_error_policy is None. Defaults to ConditionErrorPolicy::Skip.

Implementations

impl EngineConfig

pub fn observer(self, o: Arc<dyn Observer>) -> Self

Reports every run of the engine to o.

pub fn error_context(self, ec: ErrorContext) -> Self

Mirrors every run’s failure records by ec.

pub fn condition_error_policy(self, policy: ConditionErrorPolicy) -> Self

Sets the engine-wide default for how condition evaluation errors are handled.

pub fn with_condition_error_policy(self, policy: ConditionErrorPolicy) -> Self

Alias for Self::condition_error_policy.

Trait Implementations

impl Clone for EngineConfig

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for EngineConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

The observer as a presence, and the error context: EngineConfig { observer: present, error_context: None, .. }.

impl Default for EngineConfig

fn default() -> Self

Returns the “default value” for a type.