\DOC same_const
\TYPE {same_const : term -> term -> bool}
\SYNOPSIS
Constant time equality check for constants.
\KEYWORDS
constant, equality.
\DESCRIBE
In many cases, one needs to check that a constant is an instance of
the generic constant originally introduced into the signature, or that
two constants are both type instantiations of another. This can be
achieved by taking the constants apart with {dest_thy_const} and
comparing
their name and theory. However, this is relatively inefficient. Instead,
one can invoke {same_const}, which takes constant time.
\FAILURE
Never fails.
\EXAMPLE
{
- same_const boolSyntax.universal (rator (concl BOOL_CASES_AX));
> val it = true : bool
}
\SEEALSO
Term.aconv, Term.dest_thy_const, Term.match_term.
\ENDDOC