http://blogs.perl.org/users/jeffrey_kegler/2013/01/making-dsls-even-simpler.html
$ perl marpa-scannerless-calculator.pl --stdin
W=1; ( ( 0.3802 + ( 13.4739 * ( ( W / 0.9 )^(1/2) ) ) ) + ( 4.6272 * (
+ W / 0.9 ) ) )
^Z
result = 19.7242709884476
value of "W" = "1"
Wouldn't you know it, perl agrees
$ perl -E " $W=1; say ( ( 0.3802 + ( 13.4739 * sqrt( ( $W / 0.9 ) ) )
+) + ( 4.6272 * ( $W / 0.9 ) ) ); "
19.7242709884476
rule number enhanced courtesy of this/https://gist.github.com/4485844#file-scanless-pl
Being able to specify a qr{} would simplify this DSL immensely
Make of it what you will
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|