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Re: Ungready Flag on Regex

Subject: Re: Ungready Flag on Regex
From: "Imsieke, Gerrit, le-tex gerrit.imsieke@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 23 Oct 2020 01:01:23 -0000
Re:  Ungready Flag on Regex

Have you tried Martin's solution?

It solves the issue and it doesn't create atomic values instead of text nodes.

You need to see that you've been smashing the results of the inner function invocations to text nodes, no matter whether elements have been created by these functions in the first place.

Martin hasn't changed xsl:non-matching-substring in the innermost function pt:replaceTextArobase() so it still produces a text node. xsl:matching-substring in pt:replaceTextArobase() is unchanged. It creates a text:span element with a text node in it.

Previously, whatever came out of pt:replaceTextArobase() was cast to a text node by the text value template in pt:replaceTextDollar().
The use of xsl:sequence instead of the text value template just makes sure that whatever pt:replaceTextArobase() returned will be returned in the xsl:non-matching substring branch. If it is a text:span element, the result will be a text:span element, if it is a text node, the result will also be a text node. No casting to atomic values occurs.

Maybe you picture xsl:sequence as doing some reverse smashing operation: While xsl:value-of smashes atomic values to text nodes, you might think that xsl:sequence smashes text nodes to atomic values. It does not.


P.S.: Looking forward to the future requirement that the ** $$ @@ pseudo markup should be able to nest.

On 23.10.2020 00:50, Christophe Marchand cmarchand@xxxxxxxxxx wrote:
That's not the problem. Changing to <xsl:sequence .../> is worse, it creates some pseudo-atomic-values instead of text() nodes.


Le 22/10/2020 C 23:48, Martin Honnen martin.honnen@xxxxxx a C)critB :
On 22.10.2020 23:14, Christophe Marchand cmarchand@xxxxxxxxxx wrote:
For sure, regex are strange to me, even if I think they are really usefull.

So, when a regex king give me the right regex to do exactly what I want,
I take this regex, and I adapt it to other similar use-cases.

My first problem was with comments, and I've adapted it to other kind of
markers :


The first two are Ok, but I can not make it run for the third case.

I join the XSL, a XSpec file, I have one scenario that fails. If someone
could :

B 1. give me the solution
B 2. explain me why it was failing
B 3. explain me why the solution works

it would be really a good thing.

In France, we now have a curfew at 9pm. There a lot of beer that can not
be sold ; i may have a barrel for the guy who help me !

Best regards,

Le 08/10/2020 C  16:54, Imsieke, Gerrit, le-tex gerrit.imsieke@xxxxxxxxx
a C)critB :

On 08.10.2020 16:26, Liam R. E. Quin liam@xxxxxxxxxxxxxxxx wrote:
You want [^*]*?

Thinking of the brilliant potential for misunderstanding that this answer entails.

Christophe: I don't understand why you are asking me whether I want

Jokes aside, I think you need the non-greedy question mark modifier,
but not on [^*]*. You use it to make .* non-greedy. Otherwise it will
stop at the first '*' that it encounters.

This works:

<xsl:template name="xsl:initial-template">
B  <doc>
B B B  <xsl:analyze-string
B B B B B  select="'Comments are delimited by **/* */** or prefixed by
B B B B B  regex="\*\*(.*?)\*\*">
B B B B B  <xsl:matching-substring>
B B B B B B B  <b>
B B B B B B B B B  <xsl:value-of select="regex-group(1)"/>
B B B B B B B  </b>
B B B B B  </xsl:matching-substring>
B B B B B  <xsl:non-matching-substring>
B B B B B B B  <xsl:value-of select="."/>
B B B B B  </xsl:non-matching-substring>
B B B  </xsl:analyze-string>
B  </doc>

I think the issue is your use of text value templates


that strips any elements; you need to use
B  <xsl:non-matching-substring>
B B B  <xsl:sequence select="pt:replaceTextArobase(.)"/>
B  </xsl:non-matching-substring>

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