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put an expression to evaluate to find the path instead of the path

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that was there when the html file was built.

closes PR 12545 (I do not agree with Eli's proposal for fixing this so I
did it differently)
This commit is contained in:
Robby Findler 2012-02-07 16:14:09 -06:00
parent 6633387827
commit 4bac243efe
1 changed files with 6 additions and 5 deletions
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11
collects/redex/private/tut.scrbl
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@ -22,7 +22,6 @@
slideshow/pict
racket/pretty))
@(interaction-eval #:eval amb-eval (begin (pretty-print-columns 40) (random-seed 0)))
@(define-runtime-path tut-subst.rkt (list 'lib "tut-subst.rkt" "redex"))
@(define orig-op (current-output-port))
@(define orig-ep (current-error-port))
@ -539,12 +538,14 @@ To define a reduction relation, we also have to define substitution.
Generally speaking, substitution functions are tricky to get right
and, since they generally are not shown in papers, we have defined
a workhorse substitution function in Racket that runs in near linear
time; the source code is here, if you'd like to have a look (with
test cases in the @filepath{test/tut-subst-test.rkt}, relative to
the directory below):
time; the source code is included with Redex, if you'd like to have a look;
evaluate the expression below in the REPL to find the precise path
on your system (test cases are in @filepath{test/tut-subst-test.rkt},
relative to @filepath{tut-subst.rkt}):
@centered{@filepath{@(path->string tut-subst.rkt)}}
@centered{@racket[(collection-file-path "tut-subst.rkt" "redex")]}
That file defines the function @racket[subst/proc] that expects four
arguments: a predicate for determining if an expression is a variable,
a list of variables to replace, a list of terms to replace them with,