Mogun

Mogun language is currently in early design stage. Its primary target is low-level speed-critical tasks, which you do not normally write on Factor itself (cell tags, GC, etc). Core of its design is programmer-friendly static typing with transparent and precise control over any compiler optimizations. Possibly, it's going to be LLVM-backended.

Basic Principles

Local stack shuffling

Only local stack shuffling primitive is "( .. )" syntax. It can rearrange and name any constant number of top stack elements. All other simple shufflers and combinators are normal words:

: drop ( >X ) ;
: dup ( <X X ) ;
: swap ( <Y X >Y ) ;

: dip -- ( >X QUOT ) call X ;
: keep -- ( X QUOT ) call X ;

: 2drop drop drop ;
: 2dip -- swap [ dip ] dip ;

: bi -- [ keep ] dip call ;
: bi* -- [ dip ] dip call ;
: bi@ -- dup bi* ;

In combinators defititions you can see "--" word, which do not appear in shufflers. This word is unusual for Factor and its function will be described later.

CLASS: integer { min integer } { max integer } ;

CLASS: sgn ;

CLASS: positive < sgn ;
CLASS: zero     < sgn ;
CLASS: negative < sgn ;

MIMIC: integer sgn