The APL IL Interpreter Generator

The objective of the APL IL Interpreter Generator is to solve the problem of creating APL interpreters for different machines at a minimum cost. The objective has been accomplished by writing an APL interpreter in a specially designed programming language (IL) that has very low semantics but high-level syntax. The interpreter is translated to each target machine language by easily built compilers that produce high-performance code. The paper describes IL, the APL interpreters written in IL, and the final systems generated for seven different target machines and operating systems. Some of these systems have been generated in an extremely short time.