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Pastel (programming language)

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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.

Pastel was conceived by Jeffrey M. Broughton, then Project Engineer in charge of compilers and operating system software for the S-1 project, because of dissatisfaction with the PL/1 language in which Amber was being implemented. The language was named Pastel ("an off-color Pascal") and was the inspiration for Richard Stallman's GNU C compiler. Compared with Pascal compilers of that period, Pastel's features included:

  • 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

    Pastel (programming language) Wikipedia
    (Text) CC BY-SA


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