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From mariogarcia <...@git.apache.org>
Subject [GitHub] groovy pull request #439: WIP Add groovy-macro docs
Date Sun, 09 Oct 2016 14:48:23 GMT
Github user mariogarcia commented on a diff in the pull request:

    https://github.com/apache/groovy/pull/439#discussion_r82523885
  
    --- Diff: src/spec/doc/core-metaprogramming.adoc ---
    @@ -2868,6 +3015,90 @@ The difference is that when you use `assertScript`, the code in
the `assertScrip
     unit test is executed*. That is to say that this time, the `Subject` class will be compiled
with debugging active, and
     the breakpoint is going to be hit.
     
    +===== ASTMatcher
    +
    +Sometimes you may want to make assertions over AST nodes whether to filter those nodes,
or to make sure a given
    +transformation has built the expected AST node.
    +
    +**Filtering nodes**
    +
    +For instance if you would like to apply a given transformation only to a specific set
of AST nodes, you could
    +use **ASTMatcher** to filter these nodes. The following example shows how to transform
a given expression to
    +another. Using **ASTMatcher** it looks for a specific expression `1 + 1` and it transforms
it to `3`. That's why
    +I called it the `@Joking` example.
    --- End diff --
    
    Changed!


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