Struct U64 

pub struct U64;

Unsigned 64-bit integer (8 bytes at WittLevel::W8).

See also

• crate::std_types for the family contract and IRI namespace.
• Wiki: 05 Building Block View § Whitebox prism
• AGENTS.md § 11

Constraints

• TC-01 — admission is compile-time
• TC-04 — bilateral compile-time enforcement
• ADR-013 — closure under uor-foundation
• ADR-017 — content-addressed identity via the IRI

Behavior

use prism::pipeline::ConstrainedTypeShape;
use prism::std_types::U64;
assert_eq!(<U64 as ConstrainedTypeShape>::SITE_COUNT, 8);
assert_eq!(<U64 as ConstrainedTypeShape>::IRI, "https://uor.foundation/type/ConstrainedType");
assert!(<U64 as ConstrainedTypeShape>::CONSTRAINTS.is_empty());

Trait Implementations

impl ConstrainedTypeShape for U64

const IRI: &'static str = "https://uor.foundation/type/ConstrainedType"

IRI of the ontology type:ConstrainedType instance this shape represents.

const SITE_COUNT: usize = 8

Number of sites (fields) this constrained type carries.

const CONSTRAINTS: &'static [ConstraintRef]

Per-site constraint list. Empty means unconstrained.

const CYCLE_SIZE: u64

ADR-032: cardinality of the shape’s value-set (the cycle structure of the shape under the substrate’s discrete-clock model). Used by the prism_model! macro to lower first_admit (closure-body grammar G16) to the correct descent measure. Conventions:

const SITE_BUDGET: usize = Self::SITE_COUNT

Ontology-level siteBudget: count of data sites only, excluding bookkeeping introduced by composition (coproduct tag sites, etc.). Equals SITE_COUNT for leaf shapes and for shapes whose composition introduces no bookkeeping (products, cartesian products). Strictly less than SITE_COUNT for coproduct shapes and any shape whose SITE_COUNT includes inherited bookkeeping. Introduced by the Product/Coproduct Completion Amendment §4a; defaults to SITE_COUNT so pre-amendment shape impls remain valid without edits.