-USING: central help.markup help.syntax ;
+USING: central destructors help.markup help.syntax ;
HELP: CENTRAL:
{ $description
{ $snippet "with-symbol" } ". This is a middle ground between excessive "
"stack manipulation and full-out locals, meant to solve the case where "
"one object is operated on by several related words."
+} ;
+
+HELP: DISPOSABLE-CENTRAL:
+{ $description
+ "Like " { $link POSTPONE: CENTRAL: } ", but generates " { $snippet "with-" }
+ " words that are wrapped in a " { $link with-disposal } "."
} ;
\ No newline at end of file
-USING: central tools.test ;
+USING: accessors central destructors kernel math tools.test ;
IN: scratchpad
CENTRAL: test-central
-[ 3 ] [ 3 [ test-central ] with-test-central ] unit-test
\ No newline at end of file
+[ 3 ] [ 3 [ test-central ] with-test-central ] unit-test
+
+TUPLE: test-disp-cent value disposed ;
+
+! A phony destructor that adds 1 to the value so we can make sure it got called.
+M: test-disp-cent dispose* dup value>> 1+ >>value drop ;
+
+DISPOSABLE-CENTRAL: t-d-c
+
+: test-t-d-c ( -- n )
+ test-disp-cent new 3 >>value [ t-d-c ] with-t-d-c value>> ;
+
+[ 4 ] [ test-t-d-c ] unit-test
\ No newline at end of file
-USING: kernel lexer namespaces parser sequences words ;
+USING: destructors kernel lexer namespaces parser sequences words ;
IN: central
: define-central-getter ( word -- )
dup [ get ] curry (( -- obj )) define-declared ;
-: define-central-setter ( word with-word -- )
- [ with-variable ] with (( object quot -- )) define-declared ;
+: define-centrals ( str -- getter setter )
+ [ create-in dup define-central-getter ]
+ [ "with-" prepend create-in dup make-inline ] bi ;
+
+: central-setter-def ( word with-word -- with-word quot )
+ [ with-variable ] with ;
+
+: disposable-setter-def ( word with-word -- with-word quot )
+ [ pick [ drop with-variable ] with-disposal ] with ;
+
+: declare-central ( with-word quot -- ) (( object quot -- )) define-declared ;
: define-central ( word-name -- )
- [ create-in dup define-central-getter ] keep
- "with-" prepend create-in [ define-central-setter ] keep
- make-inline ;
+ define-centrals central-setter-def declare-central ;
+
+: define-disposable-central ( word-name -- )
+ define-centrals disposable-setter-def declare-central ;
+
+SYNTAX: CENTRAL: ( -- ) scan define-central ;
-SYNTAX: CENTRAL: ( -- ) scan define-central ;
\ No newline at end of file
+SYNTAX: DISPOSABLE-CENTRAL: ( -- ) scan define-disposable-central ;
\ No newline at end of file