CODEWITHSUNDEEP
eclipsextext
Har
Har

Reputation: 3918

Xtext: Arithmetic example: What uses the calculator class and how?

Ive been looking at the Arithmetics example that comes with xtext and I stumbled upon the Calculator.java class under the org.eclipse.xtext.example.arithmetics.interpreter package but I cannot find any reference to it.

I understand that this class is used to walk the AST and evaluate the expressions but who is calling it and how is it registered?

I have a similar example which I am setting up from scratch and using the arithmetics as an example, however I dont know how to register the AST walker so that each time a tree is visited the particular method is triggered as in the Calculator class.

Upvotes: 0

Views: 773

Answers (1)

edi
edi

Reputation: 3122

If you right-click the Calculator class (either directly within the Java Editor or in the Package Explorer) and select References -> Workspace you will get listed all occurrences of the Calculator type. You'll see that it is used in the ArthimeticsValidator and InterpreterAutoEdit types, where the latter is responsible for actually evaluating an expression within its evaluate method. From the InterpreterAutoEdit class, you can work your way up and see that it is registered via the ArthimeticsUiModule.

Upvotes: 1

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