Documentation

Lean.Meta.Tactic.SplitIf

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opaque Lean.Meta.SplitIf.ext :
Lean.LazyInitExtension Lean.MetaM Lean.Meta.Simp.Context
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def Lean.Meta.SplitIf.getSimpContext :
Lean.MetaM Lean.Meta.Simp.Context

Default Simp.Context for simpIf methods. It contains all congruence theorems, but just the rewriting rules for reducing if expressions.

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def Lean.Meta.SplitIf.discharge? (useDecide : optParam Bool false) :
Lean.Meta.Simp.Discharge

Default discharge? function for simpIf methods. It only uses hypotheses from the local context. It is effective after a case-split.

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partial def Lean.Meta.SplitIf.findIfToSplit? (e : Lean.Expr) :
Option Lean.Expr

Return the condition of an if expression to case split.

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def Lean.Meta.SplitIf.splitIfAt? (mvarId : Lean.MVarId) (e : Lean.Expr) (hName? : Option Lean.Name) :
Lean.MetaM (Option (Lean.Meta.ByCasesSubgoal × Lean.Meta.ByCasesSubgoal))
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def Lean.Meta.simpIfTarget (mvarId : Lean.MVarId) (useDecide : optParam Bool false) :
Lean.MetaM Lean.MVarId
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def Lean.Meta.simpIfLocalDecl (mvarId : Lean.MVarId) (fvarId : Lean.FVarId) :
Lean.MetaM Lean.MVarId
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def Lean.Meta.splitIfTarget? (mvarId : Lean.MVarId) (hName? : optParam (Option Lean.Name) none) :
Lean.MetaM (Option (Lean.Meta.ByCasesSubgoal × Lean.Meta.ByCasesSubgoal))
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def Lean.Meta.splitIfLocalDecl? (mvarId : Lean.MVarId) (fvarId : Lean.FVarId) (hName? : optParam (Option Lean.Name) none) :
Lean.MetaM (Option (Lean.MVarId × Lean.MVarId))
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