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Project-declaredLean 4.31.0 · null

Action scope produces boolean

Cedar.Thm.action_scope_produces_boolean

Plain-language statement

Lemma: evaluating the actionScope of any policy produces a boolean (and does not error)

Exact Lean statement

theorem action_scope_produces_boolean (policy : Policy) (request : Request) (entities : Entities) :
  producesBool policy.actionScope.toExpr request entities

Formal artifact

Lean source

Canonical source
Full Lean sourceLean 4
theorem action_scope_produces_boolean (policy : Policy) (request : Request) (entities : Entities) :  producesBool policy.actionScope.toExpr request entities:= by  simp only [producesBool, ActionScope.toExpr, Scope.toExpr, Bool.false_eq_true]  cases policy.actionScope  case actionInAny list =>    split    case h_1 => trivial    case h_2 res h =>      simp at h      have h₁ := action_in_set_of_euids_produces_boolean list request entities      unfold producesBool at h₁      split at h₁ <;> rename_i h₂      · simp [h₂] at h      · simp at h₁  case actionScope scope =>    simp only [Var.eqEntityUID, Var.inEntityUID, Var.isEntityType]    cases scope <;> simp [evaluate, apply₁, apply₂, Result.as]    case isMem ety uid =>      simp only [Coe.coe, Value.asBool, Except.bind_ok, beq_eq_false_iff_ne,        ne_eq, ite_not]      generalize (inₑ request.action uid entities) = b₁      generalize (ety == request.action.ty) = b₂      split <;> rename_i h      · trivial      · split at h <;> simp at h
Project
Cedar Specification
License
Apache-2.0
Commit
3f093947b8ae
Source
cedar-lean/Cedar/Thm/Authorization/Authorizer.lean:337-362

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Related declarations

Project-declaredLean 4.31.0

Find? ext

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Source project: Cedar Specification

Person-level attribution pending.

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Project-declaredLean 4.31.0

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Project-declaredLean 4.31.0

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Plain-language statement

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authorizationprogram verificationsemantics

Source project: Cedar Specification

Person-level attribution pending.

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