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Document intersection classes

db4
Slava Pestov 2008-05-10 18:59:23 -05:00
parent db59ade218
commit 849b4a062c
1 changed files with 6 additions and 3 deletions
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core/syntax/syntax-docs.factor
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@ -496,14 +496,17 @@ HELP: M:
HELP: UNION:
{ $syntax "UNION: class members... ;" }
{ $values { "class" "a new class word to define" } { "members" "a list of class words separated by whitespace" } }
{ $description "Defines a union class. An object is an instance of a union class if it is an instance of one of its members." }
{ $notes "Union classes are used to associate the same method with several different classes, as well as to conveniently define predicates." } ;
{ $description "Defines a union class. An object is an instance of a union class if it is an instance of one of its members." } ;
HELP: INTERSECTION:
{ $syntax "INTERSECTION: class participants... ;" }
{ $values { "class" "a new class word to define" } { "participants" "a list of class words separated by whitespace" } }
{ $description "Defines an intersection class. An object is an instance of a union class if it is an instance of all of its participants." } ;
HELP: MIXIN:
{ $syntax "MIXIN: class" }
{ $values { "class" "a new class word to define" } }
{ $description "Defines a mixin class. A mixin is similar to a union class, except it has no members initially, and new members can be added with the " { $link POSTPONE: INSTANCE: } " word." }
{ $notes "Mixins classes are used to mark implementations of a protocol and define default methods." }
{ $examples "The " { $link sequence } " and " { $link assoc } " mixin classes." } ;
HELP: INSTANCE: