File: type_in_type.doc

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\DOC type_in_type

\TYPE {type_in_type : (type -> type -> bool)}

\SYNOPSIS
Determines whether a given type is a subtype of another.

\DESCRIBE
The predicate {type_in_type} returns {true} if the type
given as the first argument is a subtype of the second.

\EXAMPLE
{
   #type_in_type ":num" ":num # bool";;
   true : bool

   #type_in_type ":num" ":(num)list";;
   true :bool

   #type_in_type ":bool" ":num + bool";;
   true : bool
}
\SEEALSO
find_term, find_terms, type_in

\ENDDOC