[stringtemplate-interest] who uses regions?

[Terence Parr]

On Jun 30, 2011, at 12:39 PM, Sam Harwell wrote:

> I actually came up with an idea last week concerning this, but figured you
> were done looking at regions so I didn't mention it. Looks like that might
> not be the case anymore. :)
> 
> Summary of how it could work:
> 
> * Get rid of explicit/implicit/embedded regions. Regions are always defined
> explicitly, and a region reference is just a normal template reference.

How do you define explicitly?  Can you give an example?
T

> * Allow a template definition to be formatted as "@dotted.ident.ifier".
> * For the above rule, the template name is "@dotted.ident.ifier". The
> character '@' is a new ID start char. The characters '-', '_', and '.' are
> ID characters (but not ID start chars).
> * A template expression <@name> refers to @currentTemplate.name.
> 
> In the implementation, the notion of regions is now gone. The @ syntax is
> just shorthand for adding "@currentTemplateName." to the name of the
> template to lookup, which makes them effectively the same as they used to be
> since the automatic insertion of the current template name means you can
> only reference them within a specific template.
> 
> If <@name()> appears within a template named "@other.item", the extra @ is
> dropped when forming "@other.item.name".
> 
> When looking up a template, if the name starts with @ and isn't found,
> return an empty template without printing an error message (covers the case
> where implicit regions were used before).
> 
> Sam
> 
> -----Original Message-----
> From: stringtemplate-interest-bounces at antlr.org
> [mailto:stringtemplate-interest-bounces at antlr.org] On Behalf Of Terence Parr
> Sent: Thursday, June 30, 2011 1:56 PM
> To: stringtemplate-interest Template
> Subject: [stringtemplate-interest] who uses regions?
> 
> they are driving me nuts in STv4 implementation. i'm not even sure what they
> mean anymore with subdirs and /a/b/c/d style references with inheritance
> mixed in.
> 
> I don't use anymore myself. I released I needed them in ANTLR v3 code gen
> due to forcing too much of logic into templates.  v4 does all thinking in
> code and constructs internal model and then just makes templates and fills
> and renders.
> 
> i'd love to eject regions but not if people use.  I guess ANTLR 3.4 needs
> them...hmm...
> 
> Ter
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