alpha-rho-void-before-x.yaml

# SPDX-FileCopyrightText: Copyright (c) 2025 Objectionary.com
# SPDX-License-Identifier: MIT
---
rules:
  basic: ['alpha']
input: |
  [[ ^ -> ?, x -> ? ]](~0 -> Q.y)
output: |-
  ⟦ ρ ↦ ∅, x ↦ ∅ ⟧(x ↦ Φ.y)