Rebol Programming/funct

= USAGE: = FUNCT spec body /with object /extern words

= DESCRIPTION: = Defines a function with all set-words as locals.

FUNCT is a function value. = ARGUMENTS =
 * spec -- Help string (opt) followed by arg words (and opt type and string) (Type: block)
 * body -- The body block of the function (Type: block)

= REFINEMENTS =
 * /with -- Define or use a persistent object (self)
 * object -- The object or spec (Type: object block)
 * /extern
 * words -- These words are not local (Type: block)

= (SPECIAL ATTRIBUTES) =
 * catch

= SOURCE CODE = funct: func [ "Defines a function with all set-words as locals." [catch] spec [block!] {Help string (opt) followed by arg words (and opt type and string)} body [block!] "The body block of the function" /with "Define or use a persistent object (self)" object [object! block!] "The object or spec" /extern words [block!] "These words are not local" /local r ws wb a ][ spec: copy/deep spec body: copy/deep body ws: make block! length? spec parse spec [any [ set-word! | set a any-word! (insert tail ws to-word a) | skip ]]    if with [ unless object? object [object: make object! object] bind body object insert tail ws first object ]    insert tail ws words wb: make block! 12    parse body r: [any [ set a set-word! (insert tail wb to-word a) | hash! | into r | skip ]]    unless empty? wb: exclude wb ws [ remove find wb 'local unless find spec /local [insert tail spec /local] insert tail spec wb   ] throw-on-error [make function! spec body] ]