File: dest_imp.doc

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\DOC dest_imp

\TYPE {dest_imp : (term -> (term # term))}

\SYNOPSIS
Breaks apart an implication into antecedent and consequent.

\DESCRIBE
{dest_imp} is a term destructor for implications. Thus
{
   dest_imp "t1 ==> t2"
}
\noindent returns
{
   ("t1","t2")
}
\FAILURE
Fails with {dest_imp} if term is not an implication.

\COMMENTS
Previous version of {dest_imp} treats negations as an implication
with {F} as the conclusion. This is renamed to {dest_neg_imp}.

\SEEALSO
mk_imp, is_imp, strip_imp, dest_neg_imp.

\ENDDOC