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Clarify docs for constructors

db4
Slava Pestov 2008-03-16 00:18:28 -05:00
parent d0687751ed
commit 194b0d827e
1 changed files with 18 additions and 2 deletions
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20
core/tuples/tuples-docs.factor
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@ -12,6 +12,22 @@ ARTICLE: "tuple-constructors" "Constructors and slots"
$nl
"A shortcut for defining BOA constructors:"
{ $subsection POSTPONE: C: }
"Examples of constructors:"
{ $code
"TUPLE: color red green blue alpha ;"
""
"C: <rgba> rgba"
": <rgba> color construct-boa ; ! identical to above"
""
": <rgb>"
" { set-color-red set-color-green set-color-blue }"
" color construct ;"
": <rgb> f <rgba> ; ! identical to above"
""
": <color> construct-empty ;"
": <color> { } color construct ; ! identical to above"
": <color> f f f f <rgba> ; ! identical to above"
}
"After construction, slots are read and written using various automatically-defined words with names of the form " { $snippet { $emphasis "class-slot" } } " and " { $snippet "set-" { $emphasis "class-slot" } } "." ;
ARTICLE: "tuple-delegation" "Delegation"
@ -48,8 +64,8 @@ ARTICLE: "tuples" "Tuples"
"Tuples are user-defined classes composed of named slots. A parsing word defines tuple classes:"
{ $subsection POSTPONE: TUPLE: }
"An example:"
{ $code "TUPLE: person name address phone ;" }
"This defines a class word named " { $snippet "person" } ", along with a predicate " { $snippet "person?" } ", and the following reader/writer words:"
{ $code "TUPLE: person name address phone ;" "C: <person> person" }
"This defines a class word named " { $snippet "person" } ", a predicate " { $snippet "person?" } ", a constructor named " { $snippet "<person>" } ", and the following reader/writer words:"
{ $table
{ "Reader" "Writer" }
{ { $snippet "person-name" } { $snippet "set-person-name" } }