1. GROOVY
AST
CÉDRIC CHAMPEAU
ANDRES ALMIRAY

2. GET THE CODE
https://github.com/melix/ast-workshop
Setup gradle 1.6 (or use gradlew)
Browse docs/gen/workshop.html

3. AGENDA
AST, How did we get here?
AST Transformations
Building your own AST
Excercises

4. AST,
HOW DID
WE GET
HERE?

11. AST
TRANSFOR
MATIONS

12. E
V
I
L
G
E
N
I
U
S

17. STANDARD GROOVY
DISTRO INCLUDES:
* @EqualsAndHashCode
* @ToString
* @TupleConstructor
* @Canonical
* @InheritConstructors
* @IndexedProperty
* @Lazy
* @PackageScope
* @NotYetImplemented
* @AutoClone
* @AutoExternalize
* @Synchronized
* @Field
* @Grab
* @GrabResolver
* @CompileStatic
* @TypeChecked
* @ASTTest

18. STANDARD GROOVY
DISTRO INCLUDES:
* @Bindable
* @Vetoable
* @ListenerList
* @ConditionalInterrupt
* @ThreadInterrupt
* @TimedInterrupt
* @WithReadLock
* @WithWriteLock
* @Newify
* @Log
* @Slf4j
* @Log4j
* @Commons
* @Singleton
* @Immutable
* @Delegate
* @Category
* @Mixin

19. GROOVY ECOSYSTEM
BRINGS:
* @ByteCode
* @Scalify
* GContracts
* @Invariant
* @Requires
* @Ensures
* Grails
* @Entity
* @TestFor
* Griffon
* @EventPublisher
* @Threading
* @PropertyListener
* @MVCAware
* @MessageSourceAware
* @ResourceResolverAware
* @ResourcesAware
* @ThreadingAware

20. GLOBALAST
TRANSFORMATIONS
Groovy – Grab
Grails – GORM API
Griffon – Threading injection
Spock – the whole shebang

21. BUILDING
YOUR OWN
AST

23. LOCALAST
TRANSFORMATION
1. Define an @interface
• Easy peasy … right?
2. Define AST implementation
• huh ……
3. Profit!

24. GLOBALAST
TRANSFORMATION
1. Add AST implementation entry to
• META-INF/services/
org.codehaus.groovy.transform.ASTTransformation
2. Define AST implementation
• ??? !!! ??? !!!
3. Profit!

36. ADDITIONAL TOOLS
AST browser
AST Builder

42. Thank You!
@cedricchampeau
@aalmiray