diff options
| -rw-r--r-- | doc/refman/RefMan-tac.tex | 10 | ||||
| -rw-r--r-- | tactics/extratactics.ml4 | 13 |
2 files changed, 23 insertions, 0 deletions
diff --git a/doc/refman/RefMan-tac.tex b/doc/refman/RefMan-tac.tex index c1d6b1d0c..3f9f03c40 100644 --- a/doc/refman/RefMan-tac.tex +++ b/doc/refman/RefMan-tac.tex @@ -989,6 +989,16 @@ Assumptions} (see Section~\ref{PrintAssumptions}). Admitted subgoals have names of the form {\ident}\texttt{\_admitted} possibly followed by a number. +\subsection{\tt is\_evar \term +\tacindex{is\_evar} +\label{isevar}} + +This tactic applies to any goal. It checks whether its argument is an +existential variable. Existential variables are uninstantiated +variables generated by e.g. {\tt eapply} (see Section~\ref{apply}). + +\ErrMsg \errindex{Not an evar} + \subsection{Bindings list \index{Binding list} \label{Binding-list}} diff --git a/tactics/extratactics.ml4 b/tactics/extratactics.ml4 index f9c8e47fd..393934abf 100644 --- a/tactics/extratactics.ml4 +++ b/tactics/extratactics.ml4 @@ -705,3 +705,16 @@ END (* ********************************************************************* *) + +TACTIC EXTEND constr_eq +| [ "constr_eq" constr(x) constr(y) ] -> [ + if eq_constr x y then tclIDTAC else tclFAIL 0 (str "Not equal") ] +END + +TACTIC EXTEND is_evar +| [ "is_evar" constr(x) ] -> + [ match kind_of_term x with + | Evar _ -> tclIDTAC + | _ -> tclFAIL 0 (str "Not an evar") + ] +END |