def retained_source_model

bendtorch-core@0.1.0.0 · src/tensor/core_PROOF.bend:387

import Base
import bendtorch-core@0.1.0.0/src/tensor/core.bend as Core

387def retained_source_model(-original: Core.Dynamic, -retained: Core.Dynamic, +index: U32, -value: F32,
388  -exact: {(retained, Done{value}) == Core.read_dynamic(original, index) : Core.Dynamic & Result<&2, &2, Core.Error, F32>},
389  certificate: Core.DynamicSourceReadKeeps<original, index>) -> RetainedSourceModel<original, retained>:
390  Core.DynamicSourceReadKeeps{kept} = certificate
391  RetainedSourceModel{other => Equal.trans(Maybe<&2, F32>, Core.checked_observe_dynamic(retained, other),
392    Core.retained_dynamic_observe(Core.read_dynamic(original, index), other), Core.checked_observe_dynamic(original, other),
393    Equal.cong(Core.Dynamic & Result<&2, &2, Core.Error, F32>, Maybe<&2, F32>, pair => Core.retained_dynamic_observe(pair, other),
394      (retained, Done{value}), Core.read_dynamic(original, index), exact), kept(other))}