Hi Paolo: A couple of years ago I created Asteroid ( https://github.com/grooviter/asteroid) a library to deal with AST transformations. I needed to create a minor release so I've taken the oportunity to solve this problem and I think is pretty easy.
- Create a Transformer. A transformer is just a class transforming a specific type of node, and it uses a criteria to filter nodes. - Create a Global transformation that includes the previous transformer to apply it to the whole codebase - Test that the AST generated has changed from a BinaryExpression to a MethodCallExpression - Profit :) You can find the source code here: - Transformer: https://github.com/grooviter/asteroid/blob/master/asteroid-test/src/main/groovy/asteroid/global/samples/ChangeEqualsTransformer.groovy - Transformation: https://github.com/grooviter/asteroid/blob/master/asteroid-test/src/main/groovy/asteroid/global/samples/ChangeEqualsTransformation.groovy - Test: https://github.com/grooviter/asteroid/blob/master/asteroid-test/src/test/groovy/asteroid/global/samples/ChangeEqualsTransformationSpec.groovy You can find also some documentation at: http://grooviter.github.io/asteroid/ Of course any feedback on the library is appreciated :) I hope this helps Mario 2018-06-10 21:27 GMT+02:00 MG <mg...@arscreat.com>: > Hi Paolo, > > I have not used it myself, but have you had a look at the new Groovy 2.5 > "abstract syntax tree search and replace"-feature (http://groovy-lang.org/ > releasenotes/groovy-2.5.html & search for "AST matching") ? > > Cheers, > mg > > > > On 10.06.2018 16:55, Paolo Di Tommaso wrote: > > Dear all, > > I'm trying to implement an AST transformation to replace any `==` binary > expression with a equals method call invocation as suggested here > <https://stackoverflow.com/questions/28355773/in-groovy-why-does-the-behaviour-of-change-for-interfaces-extending-compar#comment45123447_28387391> > . > > > My understanding is that it's required to override each the visitor for > each node where a binary expression can appear ie. if statement, while > statement, assignment, for loop, method call, etc. > > That looks a bit overkill. I was wondering if there's a better way to > replace globally all `==` binary expressions with `equals` method > invocations. > > > Cheers, > Paolo > > >
