Pastel (programming language)

Pastel is an extended version of the Pascal programming language, created in c. 1982 for Amber, an operating system for the S-1 supercomputer project at Lawrence Livermore National Laboratory in California .^[1] The Pastel compiler was the inspiration for Richard Stallman's GNU C compiler.^[2] Pastel was conceived by Jeffrey M. Broughton, then Project Engineer in charge of compilers and operating system software for the S-1 project,^[3] because of dissatisfaction with the PL/1 language in which Amber was being implemented. The language was named Pastel ("an off-color Pascal").

Compared with Pascal compilers of that period, Pastel's features included:^[4]

Improved type definition
Parametric types
Explicit packing and allocation control
Additional parameter passing modes
Additional control constructs
Set iteration
Loop-exit form
Return statement
Module definition
Exception handling
General enhancements
Conditional boolean operations
Constant expressions
Variable initialization

References

↑ Mark Smotherman. "S-1 Supercomputer (1975-1988)". Archived from the original on 2014-02-01. https://www.webcitation.org/6N4WnuuZk.
↑ Frankston, Charles (1984). "6 Implementation". The Amber Operating System (Thesis). MIT. Retrieved 2014-02-01.
↑ Mark Smotherman (June 28, 2005). "S-1 Supercomputer Alumni". Archived from the original on 2014-02-01. https://www.webcitation.org/6N4Y48F2c.
↑ Jeff Broughton. "THE S-l PROJECT: Advancing the Digital Computing Technology Base for National Security Applications". https://archive.org/stream/bitsavers_llnls1S1Op_10037358/S1_OpenHouse_Apr85_djvu.txt. Retrieved 2014-02-01. Chapter: S-l Software Development: Programming Languages Supported

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[1] Mark Smotherman. "S-1 Supercomputer (1975-1988)". Archived from the original on 2014-02-01. https://www.webcitation.org/6N4WnuuZk.

[2] Frankston, Charles (1984). "6 Implementation". The Amber Operating System (Thesis). MIT. Retrieved 2014-02-01.

[3] Mark Smotherman (June 28, 2005). "S-1 Supercomputer Alumni". Archived from the original on 2014-02-01. https://www.webcitation.org/6N4Y48F2c.

[4] Jeff Broughton. "THE S-l PROJECT: Advancing the Digital Computing Technology Base for National Security Applications". https://archive.org/stream/bitsavers_llnls1S1Op_10037358/S1_OpenHouse_Apr85_djvu.txt. Retrieved 2014-02-01. Chapter: S-l Software Development: Programming Languages Supported

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