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use super::engine_error;
use crate::specification::engines::AbstractEngine;
use crate::specification::entities::CleartextVectorEntity;
engine_error! {
CleartextVectorCreationError for CleartextVectorCreationEngine @
EmptyInput => "The input slice must not be empty."
}
impl<EngineError: std::error::Error> CleartextVectorCreationError<EngineError> {
/// Validates the inputs
pub fn perform_generic_checks<Value>(values: &[Value]) -> Result<(), Self> {
if values.is_empty() {
return Err(Self::EmptyInput);
}
Ok(())
}
}
/// A trait for engines creating cleartext vectors from arbitrary values.
///
/// # Semantics
///
/// This [pure](super#operation-semantics) operation generates a cleartext vector from the `value`
/// slice of arbitrary values. By arbitrary here, we mean that `Value` can be any type that suits
/// the backend implementor (an integer, a struct wrapping integers, a struct wrapping foreign data
/// or any other thing).
///
/// # Formal Definition
pub trait CleartextVectorCreationEngine<Value, CleartextVector>: AbstractEngine
where
CleartextVector: CleartextVectorEntity,
{
/// Creates a cleartext vector from a slice of arbitrary values.
fn create_cleartext_vector_from(
&mut self,
values: &[Value],
) -> Result<CleartextVector, CleartextVectorCreationError<Self::EngineError>>;
/// Unsafely creates a cleartext vector from a slice of arbitrary values.
///
/// # Safety
/// For the _general_ safety concerns regarding this operation, refer to the different variants
/// of [`CleartextVectorCreationError`]. For safety concerns _specific_ to an engine, refer to
/// the implementer safety section.
unsafe fn create_cleartext_vector_from_unchecked(
&mut self,
values: &[Value],
) -> CleartextVector;
}