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<p class=MsoPlainText>I’m working to make it more generic (easier to
apply to new languages). The method has great potential, but the nuances for a
triple-stacked lexer like the one used for syntax highlighting in the following
image are harder to handle than it could be. That said, let’s talk for a
bit about where this is headed. What *<b>should</b>* StringTemplate highlighting
look like? See the screenshot below for its current state.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>The lexers in use are:<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-family:Symbol'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>Group lexer<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-family:Symbol'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>Template filter lexer that breaks up BIGSTRING<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-family:Symbol'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>Template Keywords filter lexer that further breaks
up a few of the template tokens to identify keywords<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>I need to try out a few options – my former
roommate and I discussed a possible way to handle this that I’ll try to
implement tomorrow so I can send another screenshot.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>I know I promised implementation details, and I won’t
let y’all down, but I need to do a few things first:<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-family:Symbol'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>Identify common usages/demands of stacked lexers
in syntax highlighting<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-family:Symbol'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>Design and implement a core API to hide some of
the details, since it will greatly improve performance, ease of use, and
guarantee IDE stability should any the lexers get into a bad state. I have some
ideas here that I think are going to be pretty cool.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Sam Harwell<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><img width=926 height=456 id="Picture_x0020_1"
src="cid:image001.png@01C9B959.5C7D4030"><o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>-----Original Message-----<br>
From: Terence Parr [mailto:parrt@cs.usfca.edu] <br>
Sent: Thursday, April 09, 2009 12:56 PM<br>
To: Sam Harwell<br>
Cc: antlr-interest@antlr.org<br>
Subject: Re: [antlr-interest] Building syntax highlighters with ANTLR<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Let's hear the details, Sam! :)<o:p></o:p></p>
<p class=MsoPlainText>Ter<o:p></o:p></p>
<p class=MsoPlainText>On Apr 9, 2009, at 1:38 AM, Sam Harwell wrote:<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>> I’ve made a few posts about this in the past,
and it looks like <o:p></o:p></p>
<p class=MsoPlainText>> another one is on the way. I designed a new, much
easier, robust, <o:p></o:p></p>
<p class=MsoPlainText>> and general way to make a syntax highlighter from a
grammar, and it <o:p></o:p></p>
<p class=MsoPlainText>> even allows clean “stacking” of lexers.
As a quick example, my <o:p></o:p></p>
<p class=MsoPlainText>> primary grammar recognizes a block comment, but it
doesn’t recognize <o:p></o:p></p>
<p class=MsoPlainText>> Doxygen syntax within that comment. By stacking a
Doxygen-style <o:p></o:p></p>
<p class=MsoPlainText>> fragment lexer in the colorizer, and telling it to
post-process any <o:p></o:p></p>
<p class=MsoPlainText>> token of primary type “DOC_COMMENT”, I
ended up with this.<o:p></o:p></p>
<p class=MsoPlainText>><o:p> </o:p></p>
<p class=MsoPlainText>> I’d give the gory details now, but it’s
3:30am – just had to share <o:p></o:p></p>
<p class=MsoPlainText>> because figuring this out is what kept me up! I
can’t wait to see <o:p></o:p></p>
<p class=MsoPlainText>> multi-level lexer stacking for my StringTemplate
highlighter. J<o:p></o:p></p>
<p class=MsoPlainText>><o:p> </o:p></p>
<p class=MsoPlainText>> <image001.png><o:p></o:p></p>
<p class=MsoPlainText>><o:p> </o:p></p>
<p class=MsoPlainText>> List:
http://www.antlr.org/mailman/listinfo/antlr-interest<o:p></o:p></p>
<p class=MsoPlainText>> Unsubscribe:
http://www.antlr.org/mailman/options/antlr-interest/your-email-address<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
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