13.10.2007 02:56 - oppdatert 216 dager siden av Terje Pedersen Colon

Colon is a new stack-oriented programming language with focus on making GUI-applications for ARM based gadgets.

Use of signs

A list of which chars used before or after Colon words and the description of them.

Char	Description
name:	definition of words
nameX	repeat the word X times, ie. dup3 tail2
:name	pop from stack and store in name word (a ->)
!name	dup :name (a -> a)
¤name or ¤{...}	create a new concurrent process, pid on stack (-> pid)
”@X @name” {@X @name}	pop position X from stack, @0 = first, @name call name use answer from stack, insert into string or block
+name	name + :name

Numbers

Type	Description	Example
integer	xxxx	1 5 -7 0
float	xx.xx	0.0 5.23 -23.12
hex	0xxxxh	0ah 052h 0fah
binary	0xxxxb	01111b 011011b
octal	0xxxxo	07o

Comparing

Char	Description	Example	On stack
>	større enn	10 5 >	10 true
<	mindre enn	10 5 <	10 false
≠	ulik	10 5 ≠	10 true
=	lik	10 5 =	10 false

Math

Char	Description	Example	On stack
+	addisjon	10 5 +	15
-	subtraksjon	10 5 -	5
/	divisjon	10 5 /	2
*	multiplikasjon	10 5 *	50
%	modulo	10 5 %	0

Concurrency

Word	Description	Example
receive	receive – wait for an incomming message and puts it on stack	receive out
send	msg pid send – sends a message to pid	“hello” pid send or 5 ¤{receive out} send

Resources

Word	Resource	Description
open	dcolon	“dcolon://192.168.0.2:7777/echo” open
open	file	“file://home/senikk/test.txt” open
open	mysql	“mysql://peter:abc123@localhost/my_db” open
open	web	“http://senikk.com” open
open	module	“mymodule.col” open

Each

Word	Description	Example
key	key – put key on stack	key out
yield	yield – stop execution keep the position, custom generators	yield
;;	;; – break each execution	;;
to	a b to – to-generator from a to b	1 5 to

1. {1 2 3 4} | out # liste
2. {name: "Terje Pedersen" age: 31} | "key: @key val: @0" out # hash
3. 1 5 to | out # generator
4. "Hello World!" | "char: @0" out

Conditional

Word	Description
?	Execute block after if element on stack is true
:	Else block
;	End if

1. # if
2. 5 5 = ? "yes" out
3. # if/else
4. 3 5 > ? "greater" : "less" ; out
5. # if/else if/else
6. 3
7. 5 < ? "less" out
8. 5 > ? "greater" out
9. : "equal" out
10. # switch
11. "a"
12. "a" = ?
13. "case a" out
14. "b" = ?
15. "case b" out
16. # pattern matching
17. {ok 5} {ok _} = ? "ok @tail" out
18. {warning "This is a warning"} {warning _} = ? "warning: @tail" out
19. {1 2} {x y} = ? "x=@x y=@y" out drop