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s-lang - Programming language

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s-lang is a programming language created in 1992 by John E. Davis.

#2167on PLDB 31Years Old

S-Lang is an interpreted language that was designed from the start to be easily embedded into a program to provide it with a powerful extension language. Examples of programs that use S-Lang as an extension language include the jed text editor and the slrn newsreader. Although S-Lang does not exist as a separate application, it is distributed with a quite capable program called slsh (`slang-shell'') that embeds the interpreter and allows one to execute S-Lang scripts, or simply experiment with S-Lang at an interactive prompt. Many of the the examples in this document are presented in the context of one of the above applications. S-Lang was originally a stack language that supported a postscript-like syntax. For that reason, I named it S-Lang, where the S was supposed to emphasize its stack-based nature. About a year later, I began to work on a preparser that would allow one unfamiliar with stack based languages to make use of a more traditional infix syntax. Currently, the syntax of the language resembles C, nevertheless some postscript-like features still remain, e.g., the %' character is still used as a comment delimiter.

Example from the web:
define init_array (a) { variable i, imax; imax = length (a); for (i = 0; i < imax; i++) { a[i] = 7; } } variable A = Int_Type [10]; init_array (A);

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