parks-an-evaluate-line-firing-a-lambda-no-entry-answers.yaml

# SPDX-FileCopyrightText: Copyright (c) 2025 Objectionary.com
# SPDX-License-Identifier: MIT
---
# yamllint disable rule:line-length
# An 'evaluate' line fires a λ function no entry answers, so the firing of
# the fork gets stuck the way any firing does, and '--partial' parks the
# site the fork stands at (#1874).
symbolic: |
  - λ: L_fork
    morph:
      𝑛1: $.a
    evaluate:
      𝑛2: 𝑛1
    𝑛: 𝑛2
location: 'Q.y'
partial: true
input: '⟦ y ↦ ⟦ a ↦ ⟦ λ ⤍ L_none ⟧, λ ⤍ L_fork ⟧.φ ⟧'
result: '⟦ a ↦ ⟦ λ ⤍ L_none ⟧, λ ⤍ L_fork ⟧.φ'
protocol: |
  𝕄(Φ.y):
    𝔼(L_fork):
      𝑛1·1 := L_none:λ  # 𝕄(ξ.a)
      unanswered(L_none)  # 𝔼(L_none:λ)
      stuck(L_none)