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Ceylon from here to infinity: the big
picture and what's coming
Stef Épardaud / Tom Bentley
@UnFroMage
Red Hat
Ceylon Team
Of course we have a plan
•Who's that?
•What do they do?
•Let's explain what it's about
–The Ceylon ecosystem
•Ceylon's future
Who? What?
N’importe qui, n’importe quoi
•Stef and Tom work for Red Hat
–Since Ceylon went public
•Started the JVM compiler, Herd
•Work on the SDK, tools, integration
Ceylon
Ceylon is
•A language
•Powerful, modern
•Readable
•Predictable
•An ecosystem
•A platform
•With modularity
•Tooling
The language
The language
•Inspired by Java, C#
•Type inference
•More powerful typing
•Flow-typing
•Mixins
•Lambdas
•Comprehensions
•Reified generics
•Modules
•Metamodel
•Compiles to JVM, JSVM
•Full interoperability with
Java, JavaScript
The Ceylon IDE
The Ceylon IDE
•Eclipse plugin started by David Festal (Serli) and Gavin
King
•Integrated with JDT
•Compiles to JVM, JS
•Quick-fixes, refactoring, wizards
•Integrated with the module system
•As production-ready as Java Plugin
Ceylon on IntelliJ
•Project started by Bastien Jansen and Matija Mazi
•Syntax colouring
•Compilation
•Navigation
•Execution
•Work in progress
–Started working on it again
Demo
The SDK
ceylon.language thin
•String, Boolean, Integer, Float, Character
•Set, List, Map
•Operators : Summable, Correspondence…
•Callable, apply…
•System information : runtime, language
•Metamodel
SDK aside
•ceylon.collection
•ceylon.dbc*
•ceylon.file*
•ceylon.html
•ceylon.interop*
•ceylon.io*
•ceylon.json
•ceylon.locale
•ceylon.logging
•ceylon.math*
•ceylon.net*
•ceylon.process*
•ceylon.promise*
•ceylon.test
•ceylon.time
•ceylon.unicode*
CLI
The developer's best friend: the CLI
•Inspired by git
•One command: ceylon
–Many sub-commands (compile, run…)
–Plugins scripts: ceylon-build
•Completion
•Contextual help
–Exported in man, html, docbook
Demo
ceylon.build
ceylon.build
•Started by Loïc Rouchon
•Lets you write your build in Ceylon
•Inspired by Gradle
Demo
Herd
The module repository of tomorrow
•As pretty and useable as GitHub
•Web interface easy to use
•REST API
•Staging repositories
•Works with teams
•Integration with IDE, CLI, GitHub
•Social aspect
Demo
Vert.x / Cayla
Vert.x / Cayla
•Started by Julien Viet (now working for Red Hat on
Vert.x and Ceylon)
•Consists of:
–ceylon.promise
–io.vertx.ceylon.core
•For Vert.x 2 and 3
–io.cayla.web
Demo
The future
The past, actually
•1.0 released in November 2013
•1.1 released in October 2014
–Compilation twice as fast
–Up to 5 times faster in the IDE
–Many bug fixes
–IDE way more polished and powerful
–Few changes in the language
–Much better Java interoperability
The future
•1.2 early 2015
–Serialisation
–Flow-typing in expressions
•if, switch expressions
•else blocks
–let-expressions
–Multiple constructors
–Tuple destructuring
–Lambda arg type inference
•1.3 in 2015
–Sugar for enumerations
–Assemblies
–Multi-backend modules
–Sync with Java 8 features
–AST transformers
–Linq-style comprehensions
Q & A

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Ceylon From Here to Infinity: The Big Picture and What's Coming