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Abstract Syntax Tree (AST) [message #1257552]

Wed, 26 February 2014 15:08

Alexander R is currently offline

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Messages: 211
Registered: July 2013

Senior Member

Hello everyone,

I've implemented a serialization mechanism for serializing my .dsl-files as XMI.
Now I wanted to know wheter it is right so say, that these kind of representation is
the current AST of my parsed textual grammar? The Xtext-Documentation says in chap. 12.1 : Xtext uses EMF models as the in-memory representation of any parsed text ﬁles. This in-memory object graph is called the Abstract Syntax Tree (AST)

So it should be the same. As an example I took a screenshot of my serialized .dsl file (instance of my metamodel) and created a AST by hand (the old-school way Smile

Smile

).
Maybe someone may tell me if these both representations are equal or not.

Best regards,

Alex

Attachment: serialized_model.png
(Size: 68.08KB, Downloaded 186 times)
Attachment: AST.jpg
(Size: 75.10KB, Downloaded 169 times)

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Re: Abstract Syntax Tree (AST) [message #1257671 is a reply to message #1257552]

Wed, 26 February 2014 17:35

Christian Dietrich is currently offline

Christian Dietrich

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Messages: 14665
Registered: July 2009

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They are similar but not equal.

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

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Re: Abstract Syntax Tree (AST) [message #1259585 is a reply to message #1257671]

Fri, 28 February 2014 15:10

Alexander R is currently offline

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Messages: 211
Registered: July 2013

Senior Member

Ok thanks!
I've chosen an other representation of the AST. I have just created an object-diagram wich represents my expression.

~Alex

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