SNOBOL4OP(1)

NAME
snobol4op - SNOBOL4 operators

DESCRIPTION
All SNOBOL4 operators can be redefined with OPSYN(). These are the default assignments.

The following operator character sequences are permitted and represent a cross between PDP-10 Macro SNOBOL4, SITBOL and Catspaw SPITBOL usage:

  Binary Operators
List of Binary Operators, in decreasing order of precedence. When operators of equal precedence are adjacent, associativity determines order of evaluation.

SPITBOL and BLOCKS extensions control operator definitions are orthogonal and can be controlled separately.

Char	Defn.	Assoc.	Enabled
= _	assignment	RIGHT	w/ SPITBOL
?	pattern match	LEFT	w/ SPITBOL
&	definable	LEFT
|	alternation	LEFT
#	normal concat	LEFT	w/ BLOCKS
%	vertical concat	LEFT	w/ BLOCKS
sp	concatenation	LEFT
@	definable	LEFT
- +	subtract, add	LEFT
#	definable	LEFT	w/o BLOCKS
*	multiplication	LEFT
%	definable	LEFT	w/o BLOCKS
?	definable	LEFT	w/o SPITBOL
/	division	LEFT
^ **	exponentiation	RIGHT
$ .	match naming	LEFT
~	definable	RIGHT

  Unary Operators

Char	Defn.
\	negation
?	interrogation
$	indirect reference
.	none
!	none
%	none
*	unevaluated expression
/	none
#	none
+	positive
-	negative
@	cursor position assignment
|	none
&	keyword

SEE ALSO
snobol4(1)