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Take an integer typed in the DSL and generate a java variable with it [message #1052902]

Wed, 01 May 2013 03:55

Eclipse User

Hi,

So I have my DSL setup

Game:
	{Game}('speed' speed+=Time+ 'end')?('size' sizes+=Size+ 'end')?;
	

Time:
	 value=INT;
	
Size:
	 value=INT;

so when the user types speed 1000 size 20 I want my generated Java s src to atore these values in a variable but I cant get it to work.

Im using xTend to generaet my code and ive tried a number of different ways but I dont know how to grab the value in xTend and then pass it into my java block.

I wrote a method

		def gameSpeed(Time speed) '''
		 var speed = «speed.value»(){}
		 return speed)
	'''

that seemed to get the value, but when i tried to use it, the generated code would literally display
'temp = car speed = 1000()[]' in the source file rather than
temp = 1000;

Re: Take an integer typed in the DSL and generate a java variable with it [message #1052903 is a reply to message #1052902]

Wed, 01 May 2013 04:06

Eclipse User

Hi,

in your DSL Speed is a list. (speed+=Time+)

Re: Take an integer typed in the DSL and generate a java variable with it [message #1052904 is a reply to message #1052903]

Wed, 01 May 2013 05:09

Eclipse User

Ah that makes sense, I got it to work using a for loop which calls the method

«FOR c : g.speed»
				«c.gameSpeed»
			«ENDFOR»


	def gameSpeed(Time speed) '''
		 int gameSpeed = «speed.value» ;

Re: Take an integer typed in the DSL and generate a java variable with it [message #1053477 is a reply to message #1052902]

Mon, 06 May 2013 04:28

Eclipse User

What Christian meant is that you might not want a list, and just a single value. And your code confirms that for me, since you unlikely want to declare mutiple variables "gameSpeed".

So change to:

Game:
	{Game}('speed' speed=Time 'end')?('size' sizes+=Size+ 'end')?;
	

Time:
	 value=INT;
	
Size:
	 value=INT;

-----------------------------------------
int gameSpeed = «g.speed.value» ;

[Updated on: Mon, 06 May 2013 04:31] by Moderator

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