Additions to Lean.Elab.Tactic.Basic

def Lean.Elab.Tactic.getMainTarget'' : TacticM Expr

Return expected type for the main goal, cleaning up annotations, using Lean.MVarId.getType''. Remark: note that MVarId.getType' uses whnf instead of cleanupAnnotations, and MVarId.getType'' also uses cleanupAnnotations

def Lean.Elab.Tactic.doneWithScope (scope : MessageData) : TacticM Unit

Like done but takes a scope (e.g. a tactic name) as an argument to produce more detailed error messages.

def Lean.Elab.Tactic.focusAndDoneWithScope {α : Type} (scope : MessageData) (tactic : TacticM α) : TacticM α

Like focusAndDone but takes a scope (e.g. tactic name) as an argument to produce more detailed error messages.