The examples subcollection contains several small languages
to demonstrate various different uses of PLT Redex:
arithmetic.rkt: an arithmetic language with every
possible order of evaluation
beginner.rkt: a PLT Redex implementation of (much of) the
beginning student teaching language.
church.rkt: Church numerals with call by name
normal order evaluation
combinators.rkt: fills in the gaps in a proof in
Barendregt that i and j (defined in the file) are
a combinator basis
compatible-closure.rkt: an example use of compatible
closure. Also, one of the first examples from Matthias
Felleisen and Matthew Flatt's monograph
contracts.rkt: A core contract calculus, including blame,
with function contracts, (eager) pair contracts,
and a few numeric predicates
letrec.rkt: shows how to model letrec with a store and
some infinite looping terms
omega.rkt: the call by value lambda calculus with call/cc.
Includes omega and two call/cc-based infinite loops, one of
which has an ever-expanding term size and one of which has
a bounded term size.
pi-calculus.rkt: a formulation of the pi calculus, following
Milner's 1990 paper, "Functions as Processes"
racket-machine: an operational semantics for (much of) Racket
bytecode
r6rs: an implementation of the R6RS Scheme formal semantics
semaphores.rkt: a simple threaded language with semaphores
subject-reduction.rkt: demos traces/pred that type checks
the term.
threads.rkt: shows how non-deterministic choice can be
modeled in a reduction semantics. Contains an example use
of a simple alternative pretty printer.
types.rkt: shows how the simply-typed lambda calculus's
type system can be written as a rewritten system (see
Kuan, MacQueen, Findler in ESOP 2007 for more).
