This directory contains the files for almost all the code in the book.

chez-init.scm
pltscheme-init.scm
   using drscheme, with the graphical user interface.
         Before loading pltscheme-init.scm, it is necessary
         to select "language", then choose full Scheme.
         Either the third or fourth radio button must
         be chosen leading to Textual Full Scheme with
         or without debugging.  It is then necessary to
         click on the execute button.
   using drscheme-jr -l 'Textual Full Scheme (MzScheme)'
         this will allow for the invocation of Scheme from
         within an emacs window.
larceny-init.scm
scheme48-init.scm
	Initialization files for several major Scheme implementations. 
        One of these files should be loaded at the beginning of every
        session.  This loads several files containing infrastructure:

r5rs.scm		Defines a number of useful procedures in
			strict R5RS compliance.
define-datatype.scm	Defines define-datatype, cases, and friends
sllgen.scm		Defines the parser generator.
test-harness.scm
test-suite.scm  	These two files contain the test harness and
                        the suite of test cases for the entire book.
                        We strongly urge the use of the interpret-all,
                        check-all, etc. procedures that are defined in
                        the interpreter files.  Students should add
                        their own test cases by using add-test! and
                        add-typed-test!.

Our goal has been to make the code runnable in any R5RS-compliant
Scheme system.  We have tested it on the following implementations:

Chez Scheme version 6.1
Scheme 48 0.36
Larceny v0.50
PLT Scheme v103 (Dr. Scheme and MzScheme)

Contributions of additional *-init.scm files are welcomed.

The files, in general, correspond to chapter and section numbers, or
in some cases, subsection numbers.  Some explanations of other files
are noted below.

1.scm
2-2-1.scm
2-2-2.scm
2-3-2.scm
2-3-3.scm
2-3-4.scm
2-4.scm
2-unify.scm	Code for the unification exercise, 2.25
3-5.scm
3-6-basis.scm   Basis for the three versions of letrec considered in
                this section; load this plus one of 3-6-letrec*.scm.
3-6-letrec1.scm
3-6-letrec2.scm
3-6-letrec3.scm
3-7.scm
3-8name.scm     
3-8need.scm
3-8ref.scm
3-9.scm
4-2.scm
4-3.scm
4-4.scm
5-3.scm	       Basis for the four implementations of objects
	       considered in this section. Load this plus one of 5-4-*.scm.
5-4-1.scm
5-4-2.scm
5-4-3.scm
5-4-4.scm
6-top.scm      Load 6-top.scm, which loads the other 6-*.scm files
6-checker.scm
6-grammar.scm
6-interp.scm
6-translator.scm
7-1.scm
7-2a.scm
7-2b.scm
7-3.scm
7-4.scm
7-5.scm
7-6.scm
8-4.scm
8-4danvy.scm		Code for exercise 8.31
8-5print.scm		Cps for print + letcc
8-5set.scm		Cps for set + print + letcc

all-tests.scm		Systematically runs all the tests in all the
			files; useful for portability testing.
                        After loading, invoke (do-all-tests).