opaque Lean.Meta.tactic.hygienic : Lean.Option Bool

def Lean.Meta.mkFreshBinderNameForTacticCore (lctx : LocalContext) (binderName : Name) (hygienic : Bool := true) : MetaM Name

Like mkFreshBinderNameForTactic, but takes the local context and tactic.hygienic value explicitly. Use this variant when the relevant local context is being built incrementally and differs from the ambient ← getLCtx (e.g. when introducing several binders in a single pass).

def Lean.Meta.mkFreshBinderNameForTactic (binderName : Name) : MetaM Name

Similar to Lean.Core.mkFreshUserName, but takes into account the tactic.hygienic option value. If tactic.hygienic = true, then fresh macro scopes are applied to binderName. If not, then returns an (accessible) name based on binderName that is unused in the local context.

def Lean.Meta.introNCore (mvarId : MVarId) (n : Nat) (givenNames : List Name) (useNamesForExplicitOnly preserveBinderNames : Bool) : MetaM (Array FVarId × MVarId)

@[reducible, inline]

abbrev Lean.MVarId.introN (mvarId : MVarId) (n : Nat) (givenNames : List Name := []) (useNamesForExplicitOnly : Bool := false) : MetaM (Array FVarId × MVarId)

Introduce n binders in the goal mvarId.

@[reducible, inline]

abbrev Lean.MVarId.introNP (mvarId : MVarId) (n : Nat) : MetaM (Array FVarId × MVarId)

Introduce n binders in the goal mvarId. The new hypotheses are named using the binder names. The suffix P stands for "preserving`.

def Lean.MVarId.intro (mvarId : MVarId) (name : Name) : MetaM (FVarId × MVarId)

Introduce one binder using name as the new hypothesis name.

def Lean.Meta.intro1Core (mvarId : MVarId) (preserveBinderNames : Bool) : MetaM (FVarId × MVarId)

@[reducible, inline]

abbrev Lean.MVarId.intro1 (mvarId : MVarId) : MetaM (FVarId × MVarId)

Introduce one object from the goal mvarid, without preserving the name used in the binder. Returns a pair made of the newly introduced variable (which will have an inaccessible name) and the new goal. This will fail if there is nothing to introduce, ie when the goal does not start with a forall, lambda or let.

@[reducible, inline]

abbrev Lean.MVarId.intro1P (mvarId : MVarId) : MetaM (FVarId × MVarId)

Introduce one object from the goal mvarid, preserving the name used in the binder. Returns a pair made of the newly introduced variable and the new goal. This will fail if there is nothing to introduce, ie when the goal does not start with a forall, lambda or let.

def Lean.MVarId.intro1_ (mvarId : MVarId) : MetaM MVarId

Given a goal ... |- β → α, returns a goal ... ⊢ α. Like intro h; clear h, but without ever appending to the local context.

partial def Lean.Meta.getIntrosSize : Expr → Nat

Calculate the number of new hypotheses that would be created by intros, i.e. the number of binders which can be introduced without unfolding definitions.

def Lean.MVarId.intros (mvarId : MVarId) : MetaM (Array FVarId × MVarId)

Introduce as many binders as possible without unfolding definitions.