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From paulk-asert <>
Subject [GitHub] groovy pull request #439: WIP Add groovy-macro docs
Date Sun, 09 Oct 2016 00:08:48 GMT
Github user paulk-asert commented on a diff in the pull request:
    --- Diff: src/spec/doc/core-metaprogramming.adoc ---
    @@ -2829,6 +2829,153 @@ to use the Groovy Console, in particular the AST browser tool,
to gain knowledge
     resource for learning is the[AST
     test suite.
    +==== Macros
    +===== Introduction
    +Until version 2.5.0, when developing AST transformations, developers should have a deep
knowledge about how the AST
    +(Abstract source tree) was built by the compiler in order to know how to add new expressions
or statements during
    +compile time.
    +Although the use of `org.codehaus.groovy.ast.tool.GeneralUtils` static methods could
mitigate the burden of creating
    +expressions and statements, it's still a low-level way of writing those AST nodes directly.
    +We needed something to abstract us from writing the AST directly and that's exactly what
Groovy macros were made for.
    +They allow you to add code during compile time directly, without having translate the
code you had in mind to the
    --- End diff --
    having translate => having to translate

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