SNOBOL4

SNOBOL4 - 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. ftp://apple.com/ArchiveVol1/Unix_lang. ["The SNOBOL4 Programming Language", Ralph E. Griswold et al, P-H 1971].