[stringtemplate-interest] proposed "ignore newlines" template syntax

[Terence Parr]

Hi guys, thanks for the response...

I was thinking '''...''' myself like python.  I like the suggestions about future flexibility but after 10 years this is the first change we've needed.  Contrast this with lots of antlr grammar rule options.

maybe triple double quotes to reuse "..." symbols?

t() ::= """
...
"""

?

Ter
On Apr 3, 2011, at 7:52 PM, Collin Fagan wrote:

> I think it's a great idea :) Here are some alternatives for the syntax. I'm not quite sure that at a glance I'd notice the difference between << and <<<.
> 
> Double 'double quotes'
> ""...""
> ruleRef(rule,label,elementIndex,args,scope) ::= ""
> <if(label)>
>        <label>=
> <endif>
> <if(scope)>
>        <scope:delegateName()>.
> <endif>
> <rule.name>(<args; separator=", ">);
> ""
> Triple 'single quotes'
> ruleRef(rule,label,elementIndex,args,scope) ::= 
> <if(label)>
>        <label>=
> <endif>
> <if(scope)>
>        <scope:delegateName()>.
> <endif>
> <rule.name>(<args; separator=", ">);
> """
> 
> The < and > with some other symbols.
> <# .. #>
> ruleRef(rule,label,elementIndex,args,scope) ::= <#
> <if(label)>
>        <label>=
> <endif>
> <if(scope)>
>        <scope:delegateName()>.
> <endif>
> <rule.name>(<args; separator=", ">);
> #>
> 
> <| ... |>
> ruleRef(rule,label,elementIndex,args,scope) ::= <|
> <if(label)>
>        <label>=
> <endif>
> <if(scope)>
>        <scope:delegateName()>.
> <endif>
> <rule.name>(<args; separator=", ">);
> |>
> 
> <@ ... @>
> ruleRef(rule,label,elementIndex,args,scope) ::= <@
> <if(label)>
>        <label>=
> <endif>
> <if(scope)>
>        <scope:delegateName()>.
> <endif>
> <rule.name>(<args; separator=", ">);
> @>
> 
> PHP style
> <?...?> 
> ruleRef(rule,label,elementIndex,args,scope) ::= <?
> <if(label)>
>        <label>=
> <endif>
> <if(scope)>
>        <scope:delegateName()>.
> <endif>
> <rule.name>(<args; separator=", ">);
> ?>
> 
> ASP style
> <%...%>
> ruleRef(rule,label,elementIndex,args,scope) ::= <%
> <if(label)>
>        <label>=
> <endif>
> <if(scope)>
>        <scope:delegateName()>.
> <endif>
> <rule.name>(<args; separator=", ">);
> %>
> 
> Collin
> 
> 
> On Sun, Apr 3, 2011 at 6:09 PM, Terence Parr <parrt at cs.usfca.edu> wrote:
> Hi. There is a proposal to create special syntax that allows arbitrary formatting within a template that does not result in new lines in the output. This is useful when you have a really complicated template with IFs and such that needs to generate output all on the same line. Currently, this can be quite challenging. There's no way to read a huge template on one line. Sam Harwell and I came up with a potential solution: a new <<<...>>> triple angle bracket template that ignores newlines unless you use <\n> inside.
> 
> Here's a simple example:
> 
> ruleRef(rule,label,elementIndex,args,scope) ::= <<
> <if(label)><label>=<endif><if(scope)><scope:delegateName()>.<endif><rule.name>(<args; separator=", ">);
> >>
> 
> it would probably be easier to read like this:
> 
> ruleRef(rule,label,elementIndex,args,scope) ::= <<<
> <if(label)>
> <label>=
> <endif>
> <if(scope)>
> <scope:delegateName()>.
> <endif>
> <rule.name>(<args; separator=", ">);
> >>>
> 
> come to think of it, perhaps it should also ignore whitespace so that I could indent the conditionals:
> 
> ruleRef(rule,label,elementIndex,args,scope) ::= <<<
> <if(label)>
>        <label>=
> <endif>
> <if(scope)>
>        <scope:delegateName()>.
> <endif>
> <rule.name>(<args; separator=", ">);
> >>>
> 
> We while the syntax to be close, but still recognizable as different than the usual <<...>>. I believe that there has been a proposal for special characters at the start of the template and the addition of keyword but I think a new template and closure syntax is better.
> 
> thoughts?
> 
> Thanks,
> Ter
> 
> 
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