cairo_lang_sierra/extensions/modules/
span.rs

1use crate::extensions::SpecializationError;
2use crate::extensions::type_specialization_context::TypeSpecializationContext;
3use crate::extensions::types::{
4    GenericTypeArgGenericType, GenericTypeArgGenericTypeWrapper, TypeInfo,
5};
6use crate::ids::GenericTypeId;
7
8/// Type representing a span.
9#[derive(Default)]
10pub struct SpanTypeWrapped {}
11impl GenericTypeArgGenericType for SpanTypeWrapped {
12    const ID: GenericTypeId = GenericTypeId::new_inline("Span");
13
14    fn calc_info(
15        &self,
16        _context: &dyn TypeSpecializationContext,
17        long_id: crate::program::ConcreteTypeLongId,
18        TypeInfo { storable, duplicatable, droppable, zero_sized, .. }: TypeInfo,
19    ) -> Result<TypeInfo, SpecializationError> {
20        if storable && !zero_sized {
21            Ok(TypeInfo { long_id, duplicatable, droppable, storable: true, zero_sized: false })
22        } else {
23            Err(SpecializationError::UnsupportedGenericArg)
24        }
25    }
26}
27pub type SpanType = GenericTypeArgGenericTypeWrapper<SpanTypeWrapped>;