Programming Language for Old Timers


by David A. Moon
February 2006 .. September 2008

Comments and criticisms to dave underscore moon atsign alum dot mit dot edu.


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Executable Code Classes

The following classes are used for the run-time representation of executable code:

function                  anything that can be called with arguments
  operator                a function that is also a prefix and/or infix operator
  exit-function           a function that exits from a block
method                    a piece of a function
macro                     wrapper for a macro parser/expander function
scope                     abstract class of name definition scopes
  local-scope             a scope nested inside another scope
  module                  a top-level scope

These classes are instantiated by the compiler and do not have publically defined slots.


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