From: Ross Bamford <rossrt@...>
Date: 2006-02-02T06:28:43+09:00
Subject: Re: Template language similar to examples...

(Apologies if this is a dupe, messages that cross the gateway seem to
have messed up headers - replies don't go to the list?)

On Thu, 2006-02-02 at 05:32 +0900, Edgard Riba wrote:

> #!This is a comment
> #DECLARE(%myProperty)   #!Here I declare a property (variable) for
>                         #!use within the template
> #DECLARE(%myCollection),MULTI   #!This would be an array collection
> #SET(%mySymbol,1) #!assign a value of 1
> #ADD(%myCollection,'A') #!add something to the collection
> #ADD(%myCollection,'B') #!add something to the collection
> #ADD(%myCollection,'C') #!add something to the collection
> 
> #!The code that goes below goes straight into the output,
> #!except that it takes into account how the #IF is evaluated.
> class myTestClass
> def initialize
>   #IF(%mySymbol = 1)
>   @msg = 'Test1'
>   #ELSE
>   @msg = 'Test2'
>   #ENDIF
>     #INSERT(%myTemplateProcedure,%myCollection)
> end
> end
> 
> #GROUP(%myTemplateProcedure,%pCollection)
> #!For this example, the code below generates:
> #!  @msgA = 'A'
> #!  @msgB = 'B'
> #!  @msgC = 'C'
> #!Not very useful, but serves as an example of the things I'm looking 
> for.
>    #FOR(%myCollection)
> @msg%myCollection = '%myCollection'
>    #ENDFOR
> 
> 
> The output would be:
> 
> class myTestClass
> def initialize
>   @msg = 'Test1'
>     @msgA = 'A'
>     @msgB = 'B'
>     @msgC = 'C'
> end
> end
> 
> Are any of you guys familiar with a library that will do something 
> similar to the above?

Wow. Couldn't you just use ERB?

	require 'erb'

	my_symbol = 1
	my_collection = ['A', 'B', 'C']
	my_template_proc = lambda do |coll|
	  coll.map { |a| "@msg#{a}" }.join(', ') + " = #{coll.inspect}"
	end

	e = ERB.new <<-EOF
	  class MyTestClass
	    def initialize
	      <% if my_symbol %>
	      @msg = 'Test1'
	      <% else %>
	      @msg = 'Test2'
	      <% end %>
	      <%= my_template_proc.call(my_collection) %>
	    end
	  end
	EOF

	puts e.result

-- 
Ross Bamford - rosco@roscopeco.REMOVE.co.uk