gbluma / concatenative-php Goto Github PK

It should not be necessary to call function or lambda to build a quotation; that is unwanted line noise. The following should work.

{ 1 2 3 } [ echo ] map 

Should include a lens system for accessing and updating the prototypes and arrays.

The reader is currently kind of dumb about how it parses control characters like ; and :. If they exist inside of a string or a quotation it bombs out early.

The interpreter already has a variable called defer which is used to count the nesting of things like quotations. If defer is less than or equal to 0 then it can be used as a control word, otherwise it is just a meaningless word.

( drops the space after "Hello" )
>>> : say-hello ( name -- saying ) "Hello " swap ++ ;
>>> "Garrett" say-hello .
"HelloGarrett"

>>> : say-hello ( name -- saying ) "Hello: " swap ++ ;
>>> "Garrett" say-hello .
( returns nothing )

There should be an option to simply export the code without running it.

php language.php --export test.php test.cphp

Traditional Forth makes definition easy using the colon (:) operator.

: square ( x -- x' ) dup * ;

Implement the following, dip, dup, bi, swap, drop, and the variants of them.

Also, it would be useful to implement the period (.) operator as well.

it should be easy to fire off a simple REPL

php language.php
>>> "hello world\n" echo .
hello world
>>>