STklos Reference Manual

STK accepts all the notations defined in R5RS

[] Brackets are equivalent to parentheses. They are used for grouping and to build lists. A list opened with a left square bracket must be closed with a right square bracket (lists).
: a colon at the beginning or the end of a symbol introduces a keyword. Keywords are described in section keywords.
#n= is used to represent circular structures. The value given of n must be a number. It is used as a label, which can be referenced later by a #n# notation (see below). The scope of the label is the expression being read by the outermost read.
#n# is used to reference some object previously labeled by a #n= notation; that is, #n# represents a pointer to the object labeled exactly by #n=. For instance, the object returned by the following expression
```
          (let* ((a (list 1 2))
                 (b (append '(x y) a)))
            (list a b))
          
```
can also be represented in this way:
```
          (#0=(1 2) (x y . #0#))
          
```
{} TODO//: DESCRIBE HERE BRACE NOTATION