AltME groups: search

Red: I'm still working on both the compiler and the minimal runtime 
required to run simple Red programs. I have only the very basic datatypes 
working for now, no objects (so no ports) yet. I not yet at the point 
where I can give an accurate ETA for the first alpha, but I hope 
to be able to provide that ETA in a week.


Red string! datatype will support Unicode (UTF-8 and UTF-16 encoding 
internally). I haven't implemented Unicode yet, so if some of you 
are willing to provide efficient code for supporting Unicode, that 
would greatly speedup Red progress. 

The following functions would be needed (coded in Red/System):

- UTF-8 <=> UTF-16 LE conversion routines

- (by order of importance) length?, compare (two strings), compare-case, 
pick, poke, at, find, find-case
- optinally: uppercase, lowercase, sort


All the above functions should be coded both for UTF-8 and UTF-16 
LE.

Rebol [Purpose: {make wikibook entry}
Author: "Max Vessi"
version: 1.0.0
]
my?: func [
    "Prints information about words and values."
    'word [any-type!]

    /local value args item type-name refmode types attrs rtype temp
][       
    temp:  copy ""
    if all [word? :word not value? :word] [word: mold :word]

    if any [string? :word all [word? :word datatype? get :word]] [
        types: dump-obj/match system/words :word
        sort types
        if not empty? types [
            print ["Found these words:" newline types]
            exit
        ]
        print ["No information on" word "(word has no value)"]
        exit
    ]
    type-name: func [value] [
        value: mold type? :value
        clear back tail value
        join either find "aeiou" first value ["an "] ["a "] value
    ]
    if not any [word? :word path? :word] [
        append temp reduce [mold :word "is" type-name :word]
        exit
    ]

    value: either path? :word [first reduce reduce [word]] [get :word]
    if not any-function? :value [

        append temp reduce [uppercase mold word "is" type-name :value "of 
        value: "]

        append temp either object? value [ reduce ["^/" dump-obj value] ] 
        [mold :value]
        exit
    ]
    args: third :value
    append temp  "= USAGE: = ^/ "

    if not op? :value [append temp reduce [ uppercase mold word " "] 
    ]
    while [not tail? args] [
        item: first args
        if :item = /local [break]

        if any [all [any-word? :item not set-word? :item] refinement? :item] 
        [
            append temp reduce [append mold :item " "]

            if op? :value [append temp reduce [append uppercase mold word " "]
	    value: none]
        ]
        args: next args
    ]
    append temp  "^/" 
    args: head args
    value: get word
    append temp "^/= DESCRIPTION: = ^/"
    either string? pick args 1 [
        append temp reduce [first args]
        args: next args
    ] [
        append temp "^/''(undocumented)''^/"
    ]

    append temp reduce [ "^/^/"uppercase mold word " is " type-name :value 
    " value."]
    if block? pick args 1 [
        attrs: first args
        args: next args
    ]
    if tail? args [exit]
    while [not tail? args] [
        item: first args
        args: next args
        if :item = /local [break]
        either not refinement? :item [

            all [set-word? :item :item = to-set-word 'return block? first args 
            rtype: first args]
            if none? refmode [
		append temp "^/= ARGUMENTS: =^/"
                refmode: 'args
            ]
        ] [
            if refmode <> 'refs [
                append temp "^/= REFINEMENTS: =^/"
                refmode: 'refs
            ]
        ]
        either refinement? :item [	   	  
            append temp reduce ["*'''" mold item "'''"]

            if string? pick args 1 [append temp reduce [" -- " first args] 
	    args: next args]
            append temp "^/"
        ] [
            if all [any-word? :item not set-word? :item] [
                if refmode = 'refs [append temp "*"]
                append temp reduce ["*'''" :item "''' -- "]

                types: if block? pick args 1 [args: next args first back args]

                if string? pick args 1 [append temp reduce [first args ""] 
		args: next args]
                if not types [types: 'any]
                append temp rejoin [" (Type: " types ")"]
                append temp "^/"
            ]
        ]
    ]
    if rtype [append temp reduce ["^/RETURNS:^/^-" rtype]]
    if attrs [
        append temp "^/= (SPECIAL ATTRIBUTES) =^/"
        while [not tail? attrs] [
            value: first attrs
            attrs: next attrs
            if any-word? value [
                append temp reduce  ["*'''" value "'''"]
                if string? pick attrs 1 [
                    append temp reduce [" -- " first attrs]
                    attrs: next attrs
                ]
                append temp "^/"
            ]
        ]
    ]
    editor temp
    exit
]

Rebol [Purpose: {make wikibook entry}
Author: "Max Vessi"
version: 2.0.0
]
my?: func [
    "Prints information about words and values."
    'word [any-type!]

    /local value args item type-name refmode types attrs rtype temp
][       
    temp:  copy ""
    if all [word? :word not value? :word] [word: mold :word]

    if any [string? :word all [word? :word datatype? get :word]] [
        types: dump-obj/match system/words :word
        sort types
        if not empty? types [
            print ["Found these words:" newline types]
            exit
        ]
        print ["No information on" word "(word has no value)"]
        exit
    ]
    type-name: func [value] [
        value: mold type? :value
        clear back tail value
        join either find "aeiou" first value ["an "] ["a "] value
    ]
    if not any [word? :word path? :word] [
        append temp reduce [mold :word "is" type-name :word]
        exit
    ]

    value: either path? :word [first reduce reduce [word]] [get :word]
    if not any-function? :value [

        append temp reduce [uppercase mold word "is" type-name :value "of 
        value: "]

        append temp either object? value [ reduce ["^/" dump-obj value] ] 
        [mold :value]
        exit
    ]
    args: third :value
    append temp  "= USAGE: = ^/ "

    if not op? :value [append temp reduce [ uppercase mold word " "] 
    ]
    while [not tail? args] [
        item: first args
        if :item = /local [break]

        if any [all [any-word? :item not set-word? :item] refinement? :item] 
        [
            append temp reduce [append mold :item " "]

            if op? :value [append temp reduce [append uppercase mold word " "]
	    value: none]
        ]
        args: next args
    ]
    append temp  "^/" 
    args: head args
    value: get word
    append temp "^/= DESCRIPTION: = ^/"
    either string? pick args 1 [
        append temp reduce [first args]
        args: next args
    ] [
        append temp "^/''(undocumented)''^/"
    ]

    append temp reduce [ "^/^/"uppercase mold word " is " type-name :value 
    " value."]
    if block? pick args 1 [
        attrs: first args
        args: next args
    ]
    if tail? args [exit]
    while [not tail? args] [
        item: first args
        args: next args
        if :item = /local [break]
        either not refinement? :item [

            all [set-word? :item :item = to-set-word 'return block? first args 
            rtype: first args]
            if none? refmode [
		append temp "^/= ARGUMENTS: =^/"
                refmode: 'args
            ]
        ] [
            if refmode <> 'refs [
                append temp "^/= REFINEMENTS: =^/"
                refmode: 'refs
            ]
        ]
        either refinement? :item [	   	  
            append temp reduce ["*'''" mold item "'''"]

            if string? pick args 1 [append temp reduce [" -- " first args] 
	    args: next args]
            append temp "^/"
        ] [
            if all [any-word? :item not set-word? :item] [
                if refmode = 'refs [append temp "*"]
                append temp reduce ["*'''" :item "''' -- "]

                types: if block? pick args 1 [args: next args first back args]

                if string? pick args 1 [append temp reduce [first args ""] 
		args: next args]
                if not types [types: 'any]
                append temp rejoin [" (Type: " types ")"]
                append temp "^/"
            ]
        ]
    ]
    if rtype [append temp reduce ["^/RETURNS:^/^-" rtype]]
    if attrs [
        append temp "^/= (SPECIAL ATTRIBUTES) =^/"
        while [not tail? attrs] [
            value: first attrs
            attrs: next attrs
            if any-word? value [
                append temp reduce  ["*'''" value "'''"]
                if string? pick attrs 1 [
                    append temp reduce [" -- " first attrs]
                    attrs: next attrs
                ]
                append temp "^/"
            ]
        ]
    ]
    append temp "^/= Source code =^/"
    append temp  reduce ["<pre>" join word ": "]
    if not value? word [print "''undefined''" exit]
    either any [native? get word op? get word action? get word] [
        append temp reduce ["native" mold third get word]
    ] [append temp reduce  [ mold get word "</pre>"] ]
    editor temp
    ;write clipboard://  temp
    exit
]

I hope this is useful for someone

REBOL []

rest: func [s [series!]][skip s 1]

define-object: func [
	spec [block!] 
	/local 

  arg-spec ctx-spec object-name constructor-name predicate-name attributes
		spec-rule type-spec continue? w
][
	arg-names: copy []

	continue?: [none] ;used to stop parsing
	name-rule: [set w word! (insert tail arg-names w)]

 type-rule: [set w word! (unless datatype? attempt [get w] [continue?: 
 [end skip]])]

 spec-rule: [name-rule some [name-rule opt [into [some [type-rule 
 continue?]]]]]

	if any [
		not parse spec spec-rule
		arg-names <> unique arg-names
	][
		make error! "invalid spec"
	]

    object-name: to-string first arg-names
	constructor-name: to-word join 'make- object-name
	predicate-name: to-word join first arg-names '?
	attributes: rest arg-names

	arg-spec: copy []
	foreach itm attributes [
		insert tail arg-spec reduce [
			to-word join itm '-value
			either block? w: select spec itm [w][[any-type!]]
		]
	]

	ctx-spec: copy []
	arg-names: extract arg-spec 2 1
	repeat i length? attributes [

  insert tail ctx-spec reduce [to-set-word attributes/:i to-get-word 
  arg-names/:i]
	]

	;create constructor function
	set constructor-name make function! 

  compose [(reform ["Makes a new" uppercase object-name "object with 
  attributes" mold attributes]) (arg-spec)]
		compose/only [make object! (ctx-spec)] ;body

	;create predicate function
	set predicate-name make function! 

  compose [(reform ["Determines if value is a" uppercase object-name 
  "object"]) value [object!] /local types]
		compose/deep/only [
			either (attributes) = rest first value [
				foreach itm (attributes) [
					unless any [

      [any-type!] = types: select (arg-spec) to-word join itm '-value
						find types type?/word value/:itm
					][return false]
				]
				true
			][
				false
			]
		] 
]

I will give another example where I claim doing a dialect for it 
all is useless option. So you have a rebol server that holds a big 
block of users in ram you send it 2 functions a filter >> function 
[ U ] [ all [ greater? U/age 20 lesser U/age 30 equal? U/gender 'female 
] << and a mapping function >> function [ U ] [ uppercase rejoin 
[ U/name " " U/surname ] ] << server will accept the code and collect 
items where first returns true then process them vith mapping function 
join them with reducing >> function [ U ACC ] [ rejoin [ ACC ", " 
U ]<<  function and return the result.

I have another question about parse, if I may.. I am trying to make 
a parse block that will uppercase all letters after the . ! or ? 
. I did it just for dots, but I can't make it for all 3  ( one alternative 
is to call parse 3 times each time with different separator char. 
The problem can be observed here, and happens because [ A | B | C 
] pattern first looks for A and if it doesn't find a checks B , which 
means it will skip B if A is after B. Is there any way to say "use 
any of those chars - *whichever comes first" ? .. example where you 
can see the  problem:

I think I missunderstood the problem. I thought the the emphasis 
was not for words all in uppercase. Just ther first char.

sqlite3-protocol.r has a minor bug whereby locals/cols are not cleared. 
Fix is to add a "clear cols" at the beginning of the ' sqlite-exec 
func. Two other changes I made to this function were:


1) Changing “SQLITE_TEXT [any [attempt [load val: sqlite3/column_text 
stmt j] val]]” so as REBOL values are returned, and

2) Removing the /only clause from "system/words/insert/only tail 
result col" for those that prefer flat data structures (i.e. non-blocked 
records)

Finally, a simple wrapper makes the whole thing more usable:

context [

	db: none

	set 'open-db func [name [file!]] [
		db: open join sqlite://localhost/ name
	]

	set 'close-db does [
		close db
	]

	set 'describe func ['table [word!]] [

  insert db rejoin ["select type, name, sql from sqlite_master where 
  upper(tbl_name) = '" uppercase form table "' order by rootpage"]
		db/locals/sqlresult
	]

	set 'sql function [arg [string! block!]] [statement] [
		case [
			string? arg [insert db arg]
			string? first arg [
				statement: copy first arg
				repeat i -1 + length? arg [
					replace/all statement join ":" i pick arg i + 1
				]
				insert db statement
			]
		]
		db/locals/sqlresult
	]
]

which lets you do stuff like:

>> open-db %test.db
>> sql "create table t1 (col1 INTEGER, col2 TEXT)"
== []
>> describe t1
== [table t1 "CREATE TABLE t1 (col1 INTEGER, col2 TEXT)"]
>> sql reduce ["insert into t1 values (1,':1')" now/date]
== []
>> sql "select * from t1"
== [1 13-Feb-2006]
>> close-db