snobol4op - Man Page
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
Referenced By
March 31, 2022 CSNOBOL4B 2.3.1 CSNOBOL4 Manual