On Mon, Apr 20, 2015 at 3:05 PM, Costello, Roger L. <costello@mitre.org> wrote:Want to Make an Impact on the World?
Today it is nearly impossible to solve any non-trivial language recognition problem without embedding code into the grammar. In the example above we saw that we needed to embed XPath code in XML Schema, Java code in ANTRL, and C code in BISON. And that was for a trivial problem.
Want to make a huge impact on the world? Fix this problem. No more embedded code in grammars.
This problem has been fixed in FXSL since the very first version of its generic f:lrParse() function, as can be seen here:<xsl:function name="f:lrParse" as="element()*">
<xsl:param name="ppTables" as="element()"/>
<xsl:param name="pInput" as="xs:string*"/>
<xsl:param name="pFunLex" as="element()"/>
<xsl:param name="pFunOnRuleReduced" as="element()"/><xsl:sequence select=
"fLRaux:lrParse($ppTables,$pInput,1,
(),(0),(),
$pFunLex,$pFunOnRuleReduced
)"/>
</xsl:function>As can be seen, the reaction to the reduction (recognition) of any grammar rule is provided in a *function*, which is passed as a parameter.This means that the same grammar can be parsed and used in many different ways, simply by passing a different function as the value of the parameter pFunOnRuleReduced, on each different call to the function f:lrParse().
--Cheers,Dimitre Novatchev---------------------------------------Truly great madness cannot be achieved without significant intelligence.---------------------------------------To invent, you need a good imagination and a pile of junk-------------------------------------Never fight an inanimate object-------------------------------------To avoid situations in which you might make mistakes may be thebiggest mistake of all------------------------------------Quality means doing it right when no one is looking.-------------------------------------You've achieved success in your field when you don't know whether what you're doing is work or play-------------------------------------To achieve the impossible dream, try going to sleep.-------------------------------------Facts do not cease to exist because they are ignored.-------------------------------------Typing monkeys will write all Shakespeare's works in 200yrs.Will they write all patents, too? :)-------------------------------------I finally figured out the only reason to be alive is to enjoy it.
