Documentation

Lean.Meta.Tactic.Intro

source
opaque Lean.Meta.tactic.hygienic :
Lean.Option Bool
source
def Lean.Meta.mkFreshBinderNameForTactic (binderName : Lake.Name) :
Lean.MetaM Lake.Name

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

Equations
  • One or more equations did not get rendered due to their size.
source
def Lean.Meta.introNCore (mvarId : Lean.MVarId) (n : Nat) (givenNames : List Lake.Name) (useNamesForExplicitOnly : Bool) (preserveBinderNames : Bool) :
Lean.MetaM (Array Lean.FVarId × Lean.MVarId)
Equations
  • One or more equations did not get rendered due to their size.
source
@[reducible, inline]
abbrev Lean.MVarId.introN (mvarId : Lean.MVarId) (n : Nat) (givenNames : optParam (List Lake.Name) []) (useNamesForExplicitOnly : optParam Bool false) :
Lean.MetaM (Array Lean.FVarId × Lean.MVarId)

Introduce n binders in the goal mvarId.

Equations
source
@[reducible, inline, deprecated Lean.MVarId.introN]
abbrev Lean.Meta.introN (mvarId : Lean.MVarId) (n : Nat) (givenNames : optParam (List Lake.Name) []) (useNamesForExplicitOnly : optParam Bool false) :
Lean.MetaM (Array Lean.FVarId × Lean.MVarId)
Equations
  • Lean.Meta.introN mvarId n givenNames useNamesForExplicitOnly = mvarId.introN n givenNames useNamesForExplicitOnly
source
@[reducible, inline]
abbrev Lean.MVarId.introNP (mvarId : Lean.MVarId) (n : Nat) :
Lean.MetaM (Array Lean.FVarId × Lean.MVarId)

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

Equations
source
@[reducible, inline, deprecated Lean.MVarId.introNP]
abbrev Lean.Meta.introNP (mvarId : Lean.MVarId) (n : Nat) :
Lean.MetaM (Array Lean.FVarId × Lean.MVarId)
Equations
source
def Lean.MVarId.intro (mvarId : Lean.MVarId) (name : Lake.Name) :
Lean.MetaM (Lean.FVarId × Lean.MVarId)

Introduce one binder using name as the the new hypothesis name.

Equations
  • mvarId.intro name = do let __discr ← mvarId.introN 1 [name] match __discr with | (fvarIds, mvarId) => pure (fvarIds[0]!, mvarId)
source
@[deprecated Lean.MVarId.intro]
def Lean.Meta.intro (mvarId : Lean.MVarId) (name : Lake.Name) :
Lean.MetaM (Lean.FVarId × Lean.MVarId)
Equations
source
def Lean.Meta.intro1Core (mvarId : Lean.MVarId) (preserveBinderNames : Bool) :
Lean.MetaM (Lean.FVarId × Lean.MVarId)
Equations
  • One or more equations did not get rendered due to their size.
source
@[reducible, inline]
abbrev Lean.MVarId.intro1 (mvarId : Lean.MVarId) :
Lean.MetaM (Lean.FVarId × Lean.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.

Equations
source
@[reducible, inline, deprecated Lean.MVarId.intro1]
abbrev Lean.Meta.intro1 (mvarId : Lean.MVarId) :
Lean.MetaM (Lean.FVarId × Lean.MVarId)
Equations
source
@[reducible, inline]
abbrev Lean.MVarId.intro1P (mvarId : Lean.MVarId) :
Lean.MetaM (Lean.FVarId × Lean.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.

Equations
source
@[reducible, inline, deprecated Lean.MVarId.intro1P]
abbrev Lean.Meta.intro1P (mvarId : Lean.MVarId) :
Lean.MetaM (Lean.FVarId × Lean.MVarId)
Equations
source
def Lean.MVarId.intros (mvarId : Lean.MVarId) :
Lean.MetaM (Array Lean.FVarId × Lean.MVarId)

Introduce as many binders as possible without unfolding definitions.

Equations
  • One or more equations did not get rendered due to their size.
source
@[deprecated Lean.MVarId.intros]
def Lean.Meta.intros (mvarId : Lean.MVarId) :
Lean.MetaM (Array Lean.FVarId × Lean.MVarId)
Equations