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def viewed

bendvy-ecs-core@0.1.0.4 · resource_field.bend:9

import bendvy-ecs-core@0.1.0.4/resource_field.bend as ResourceField
import Base
import bendvy-ecs-core@0.1.0.4/owner_product.bend as Product

9# Canonical product lenses preserve affine siblings during selected-field operations.
10def viewed(~R:Type,~P:Type,~Rest:Type,~V:Data,~lens:Product.Lens<R,P,Rest>,rest:Rest,result:P & V) -> R & V:
11  match result:
12    case (part,value):(Product.put_field(~R,~P,~Rest,lens)(rest,part),value)

Uses (4)

Used by (1)