I've just published draft #2 of SRFI 157.  It was submitted
by Marc Nieper-Wißkirchen, author of the SRFI.

  <https://srfi.schemers.org/srfi-157/>

Here are Marc's comments on the draft:

  The major change is the addition of a sample
  implementation in terms of a meta-circular interpreter
  written in R7RS.  The meta-circular interpreter is
  accessed through an REPL, and is dubbed Inferior Scheme as
  it is run inside a host Scheme.  Inferior Scheme is
  compatible to the IEEE 1178-1990 standard.

  Apart from that, minor fixes were applied to the
  specification.

  Commit Summary

  - Add sample implementation

  File Changes

  A examples/fact.scm (47)
  A examples/simple.scm (36)
  A inferior (27)
  A inferior.scm (25)
  A lib/inferior/box.scm (26)
  A lib/inferior/box.sld (27)
  A lib/inferior/environment.scm (89)
  A lib/inferior/environment.sld (29)
  A lib/inferior/eval.scm (430)
  A lib/inferior/eval.sld (34)
  A lib/inferior/expression.scm (294)
  A lib/inferior/expression.sld (49)
  A lib/inferior/gensym.scm (40)
  A lib/inferior/gensym.sld (28)
  A lib/inferior/identifier.scm (40)
  A lib/inferior/identifier.sld (33)
  A lib/inferior/primitive.scm (333)
  A lib/inferior/primitive.sld (226)
  A lib/inferior/repl.scm (240)
  A lib/inferior/repl.sld (12)
  A lib/inferior/unspecified.scm (32)
  A lib/inferior/unspecified.sld (26)
  M srfi-157.html (36)

Here's the diff:

  <https://github.com/scheme-requests-for-implementation/srfi-157/compare/dafccba4c19749f320612c730380e2d7c8fdc6bc...741821bc9441f6eeb569630e17756846791deafa>

Regards,

SRFI Editor