Eclipse Community Forums: TMF (Xtext) » Take an integer typed in the DSL and generate a java variable with it

Help

Home

Home » Modeling » TMF (Xtext) » Take an integer typed in the DSL and generate a java variable with it

Show: Today's Messages :: Show Polls :: Message Navigator

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

Wed, 01 May 2013 07:55

Dan Barr

Messages: 10
Registered: April 2013

Junior Member

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;

Report message to a moderator

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 08:06

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

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

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

Report message to a moderator

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 09:09

Dan Barr

Messages: 10
Registered: April 2013

Junior Member

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» ;

Report message to a moderator

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 08:28

Karsten Thoms

Messages: 762
Registered: July 2009
Location: Dortmund, Germany

Senior Member

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» ;

Need professional support for Xtext, EMF, Eclipse IDE?
Go to: http://devhub.karakun.com
Twitter : @kthoms
Blog : www.karsten-thoms.de

[Updated on: Mon, 06 May 2013 08:31]

Report message to a moderator

Previous Topic:	JavaIoFileSystemAccess - null pointer
Next Topic:	ambiguity in the grammar

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Fri Apr 19 02:23:40 GMT 2024

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter