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\DOC ACCEPT_TAC
\TYPE {ACCEPT_TAC : thm_tactic}
\SYNOPSIS
Solves a goal if supplied with the desired theorem (up to alpha-conversion).
\KEYWORDS
tactic.
\DESCRIBE
{ACCEPT_TAC} maps a given theorem {th} to a tactic that solves any goal whose
conclusion is alpha-convertible to the conclusion of {th}.
\FAILURE
{ACCEPT_TAC th (A,g)} fails if the term {g} is not alpha-convertible to the
conclusion of the supplied theorem {th}.
\EXAMPLE
{ACCEPT_TAC} applied to the axiom
{
BOOL_CASES_AX = |- !t. (t = T) \/ (t = F)
}
\noindent will solve the goal
{
?- !x. (x = T) \/ (x = F)
}
\noindent but will fail on the goal
{
?- !x. (x = F) \/ (x = T)
}
\USES
Used for completing proofs by supplying an existing theorem, such as an axiom,
or a lemma already proved.
\SEEALSO
MATCH_ACCEPT_TAC.
\ENDDOC
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