 
 HELP: uncons
 { $values { "cons" "a cons object" } { "car" "the head of the list" } { "cdr" "the tail of the list" } }
-{ $description "Put the head and tail of the list on the stack." } 
-{ $see-also cons car cdr } ;
+{ $description "Put the head and tail of the list on the stack." } ;
+
+{ leach lmap lmap-with ltake lsubset lappend lfrom lfrom-by lconcat lcartesian-product lcartesian-product* lcomp lcomp* lmerge lreduce lwhile luntil } related-words
 
 HELP: leach
 { $values { "list" "a cons object" } { "quot" "a quotation with stack effect ( obj -- )" } }
-{ $description "Call the quotation for each item in the list." } 
-{ $see-also lmap lmap-with ltake lsubset lappend lfrom lfrom-by lconcat lcartesian-product lcartesian-product* lcomp lcomp* lmerge } ;
+{ $description "Call the quotation for each item in the list." } ;
 
 HELP: lmap
 { $values { "list" "a cons object" } { "quot" "a quotation with stack effect ( obj -- X )" } { "result" "resulting cons object" } }
-{ $description "Perform a similar functionality to that of the " { $link map } " word, but in a lazy manner. No evaluation of the list elements occurs initially but a " { $link <lazy-map> } " object is returned which conforms to the list protocol. Calling " { $link car } ", " { $link cdr } " or " { $link nil? } " on this will evaluate elements as required." } 
-{ $see-also leach ltake lsubset lappend lmap-with  lfrom lfrom-by lconcat lcartesian-product lcartesian-product* lcomp lcomp* lmerge } ;
+{ $description "Perform a similar functionality to that of the " { $link map } " word, but in a lazy manner. No evaluation of the list elements occurs initially but a " { $link <lazy-map> } " object is returned which conforms to the list protocol. Calling " { $link car } ", " { $link cdr } " or " { $link nil? } " on this will evaluate elements as required." } ;
 
 HELP: lmap-with
 { $values { "value" "an object" } { "list" "a cons object" } { "quot" "a quotation with stack effect ( obj elt -- X )" } { "result" "resulting cons object" } }
-{ $description "Variant of " { $link lmap } " which pushes a retained object on each invocation of the quotation." } 
-{ $see-also leach ltake lsubset lappend lmap lfrom lfrom-by lconcat lcartesian-product lcartesian-product* lcomp lcomp* lmerge } ;
+{ $description "Variant of " { $link lmap } " which pushes a retained object on each invocation of the quotation." } ;
 
 HELP: ltake
 { $values { "n" "a non negative integer" } { "list" "a cons object" } { "result" "resulting cons object" } }
-{ $description "Outputs a lazy list containing the first n items in the list. This is done a lazy manner. No evaluation of the list elements occurs initially but a " { $link <lazy-take> } " object is returned which conforms to the list protocol. Calling " { $link car } ", " { $link cdr } " or " { $link nil? } " on this will evaluate elements as required." } 
-{ $see-also leach lmap lmap-with lsubset lappend lfrom lfrom-by lconcat lcartesian-product lcartesian-product* lcomp lcomp* lmerge } ;
+{ $description "Outputs a lazy list containing the first n items in the list. This is done a lazy manner. No evaluation of the list elements occurs initially but a " { $link <lazy-take> } " object is returned which conforms to the list protocol. Calling " { $link car } ", " { $link cdr } " or " { $link nil? } " on this will evaluate elements as required." } ;
 
 HELP: lsubset
 { $values { "list" "a cons object" } { "quot" "a quotation with stack effect ( -- X )" } { "result" "resulting cons object" } }
-{ $description "Perform a similar functionality to that of the " { $link subset } " word, but in a lazy manner. No evaluation of the list elements occurs initially but a " { $link <lazy-subset> } " object is returned which conforms to the list protocol. Calling " { $link car } ", " { $link cdr } " or " { $link nil? } " on this will evaluate elements as required." } 
-{ $see-also leach lmap lmap-with ltake lappend lfrom lfrom-by lconcat lcartesian-product lcartesian-product* lcomp lcomp* lmerge } ;
+{ $description "Perform a similar functionality to that of the " { $link subset } " word, but in a lazy manner. No evaluation of the list elements occurs initially but a " { $link <lazy-subset> } " object is returned which conforms to the list protocol. Calling " { $link car } ", " { $link cdr } " or " { $link nil? } " on this will evaluate elements as required." } ;
 
 HELP: lwhile
 { $values { "list" "a cons object" } { "quot" "a quotation with stack effect ( X -- bool )" } { "result" "resulting cons object" } }
-{ $description "Outputs a lazy list containing the first items in the list as long as " { $snippet "quot" } " evaluates to t. No evaluation of the list elements occurs initially but a " { $link <lazy-while> } " object is returned with conforms to the list protocol. Calling " { $link car } ", " { $link cdr } " or " { $link nil? } " on this will evaluate elements as required." }
-{ $see-also luntil } ;
+{ $description "Outputs a lazy list containing the first items in the list as long as " { $snippet "quot" } " evaluates to t. No evaluation of the list elements occurs initially but a " { $link <lazy-while> } " object is returned with conforms to the list protocol. Calling " { $link car } ", " { $link cdr } " or " { $link nil? } " on this will evaluate elements as required." } ;
 
 HELP: luntil
 { $values { "list" "a cons object" } { "quot" "a quotation with stack effect ( X -- bool )" } { "result" "resulting cons object" } }
-{ $description "Outputs a lazy list containing the first items in the list until after " { $snippet "quot" } " evaluates to t. No evaluation of the list elements occurs initially but a " { $link <lazy-while> } " object is returned with conforms to the list protocol. Calling " { $link car } ", " { $link cdr } " or " { $link nil? } " on this will evaluate elements as required." }
-{ $see-also lwhile } ;
+{ $description "Outputs a lazy list containing the first items in the list until after " { $snippet "quot" } " evaluates to t. No evaluation of the list elements occurs initially but a " { $link <lazy-while> } " object is returned with conforms to the list protocol. Calling " { $link car } ", " { $link cdr } " or " { $link nil? } " on this will evaluate elements as required." } ;
 
 HELP: list>vector
 { $values { "list" "a cons object" } { "vector" "the list converted to a vector" } }


HELP: lconcat
{ $values { "list" "a list of lists" } { "result" "a list" } }
{ $description "Concatenates a list of lists together into one list." } 
{ $see-also leach lmap lmap-with ltake lsubset lcartesian-product lcartesian-product* lfrom-by lcomp lcomp* lmerge } ;

HELP: lcartesian-product
{ $values { "list1" "a list" } { "list2" "a list" } { "result" "list of cartesian products" } }
{ $description "Given two lists, return a list containing the cartesian product of those lists." } 
{ $see-also leach lmap lmap-with lconcat ltake lsubset lfrom-by lcartesian-product* lcomp lcomp* lmerge } ;

HELP: lcartesian-product*
{ $values { "lists" "a list of lists" } { "result" "list of cartesian products" } }
{ $description "Given a list of lists, return a list containing the cartesian product of those lists." } 
{ $see-also leach lmap lmap-with lconcat ltake lsubset lfrom-by lcartesian-product lcomp lcomp* lmerge } ;

HELP: lcomp
{ $values { "list" "a list of lists" } { "quot" "a quotation with stack effect ( seq -- X )" } { "result" "the resulting list" } }
{ $description "Get the cartesian product of the lists in " { $snippet "list" } " and call " { $snippet "quot" } " call with each element from the cartesian product on the stack, the result of which is returned in the final " { $snippet "list" } "." } 
{ $see-also leach lmap lmap-with lconcat ltake lsubset lfrom-by lcartesian-product lcomp* lmerge } ;

HELP: lcomp*
{ $values { "list" "a list of lists" } { "guards" "a sequence of quotations with stack effect ( seq -- bool )" } { "quot" "a quotation with stack effect ( seq -- X )" } { "list" "the resulting list" } { "result" "a list" } }
{ $description "Get the cartesian product of the lists in " { $snippet "list" } ", filter it by applying each guard quotation to it and call " { $snippet "quot" } " call with each element from the remaining cartesian product items on the stack, the result of which is returned in the final " { $snippet "list" } "." } 
{ $examples
  { $code "{ 1 2 3 } >list { 4 5 6 } >list 2list { [ first odd? ] } [ first2 + ] lcomp*" }
}
{ $see-also leach lmap lmap-with lconcat ltake lsubset lfrom-by lcartesian-product lcomp lmerge } ;

HELP: lmerge
{ $values { "list1" "a list" } { "list2" "a list" } { "result" "lazy list merging list1 and list2" } }
{ $description "Return the result of merging the two lists in a lazy manner." } 
{ $examples
  { $example "USE: lazy-lists" "{ 1 2 3 } >list { 4 5 6 } >list lmerge list>array ." "{ 1 4 2 5 3 6 }" }
}
{ $see-also leach lmap lmap-with lconcat ltake lsubset lfrom-by lcartesian-product lcomp } ;

HELP: lcontents
{ $values { "stream" "a stream" } { "result" string } }


HELP: lappend
{ $values { "list1" "a cons object" } { "list2" "a cons object" } { "result" "a lazy list of list2 appended to list1" } }
{ $description "Perform a similar functionality to that of the " { $link append } " word, but in a lazy manner. No evaluation of the list elements occurs initially but a " { $link <lazy-append> } " object is returned which conforms to the list protocol. Calling " { $link car } ", " { $link cdr } " or " { $link nil? } " on this will evaluate elements as required. Successive calls to " { $link cdr } " will iterate through list1, followed by list2." } ;

HELP: lfrom-by
{ $values { "n" "an integer" } { "quot" "a quotation with stack effect ( -- int )" } { "list" "a lazy list of integers" } }
{ $description "Return an infinite lazy list of values starting from n, with each successive value being the result of applying quot to n." } ;

HELP: lfrom
{ $values { "n" "an integer" } { "list" "a lazy list of integers" } }
{ $description "Return an infinite lazy list of incrementing integers starting from n." } ;

HELP: seq>list
{ $values { "index" "an integer 0 or greater" } { "seq" "a sequence" } { "list" "a list" } }
