<language> A quite distinct descendant of SNOBOL
, developed by Griswold et al in 1967.
SNOBOL4 is declarative with dynamic scope
Patterns are first-class data objects that can be constructed by concatenation and alternation.
Success and failure are used for flow control
Delayed (unevaluated) expressions can be used to implement recursion
It has a table data type.
Strings generated at run time can be treated as programs and executed.
See also vanilla
SNOBOL 4 (http://www.snobol4.org/).
["The SNOBOL4 Programming Language", Ralph E. Griswold et al, P-H 1971].