Julian Peeters julianpeeters
julianpeeters
/ toolbox-example
Last active
December 19, 2015 19:19
Trying to generate classes at runtime with a toolbox. Can get classes and objects, but having trouble getting a type to use as a type parameter, or to get the class' scalaSig.
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| //Adapted from a Gist courtesy Eugene Burmako: https://gist.github.com/5845539.html | |
| import scala.reflect.runtime.{universe => ru} | |
| import scala.tools.reflect.ToolBox | |
| import scala.language.reflectiveCalls | |
| import scala.tools.scalap.scalax.rules.scalasig._ | |
| object Test extends App { | |
| def define(tb: ToolBox[ru.type], tree: ru.ImplDef): ru.Symbol = { |
julianpeeters
/ ScalaSig2
Created
July 16, 2013 18:44
Example of a parsed(not pickled) Scala signature.
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| Some(ScalaSig version 5.0 | |
| 0: ClassSymbol(MyRecord, owner=models, flags=40, info=5 ,None) | |
| 1: MyRecord | |
| 2: models | |
| 3: models | |
| 4: NoSymbol | |
| 5: ClassInfoType(ClassSymbol(MyRecord, owner=models, flags=40, info=5 ,None),List(TypeRefType(ThisType(java.lang),java.lang.Object,List()), TypeRefType(ThisType(scala),scala.ScalaObject,List()), TypeRefType(ThisType(scala),scala.Product,List()), TypeRefType(ThisType(scala),scala.Serializable,List()))) | |
| 6: TypeRefType(ThisType(java.lang),java.lang.Object,List()) | |
| 7: ThisType(java.lang) | |
| 8: java.lang |
julianpeeters
/ ScalaSig1
Last active
December 19, 2015 20:09
An example of a pickled Scala signature, found in an ASMified case class dump file (main class, not the module class).
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| ClassWriter cw = new ClassWriter(0); | |
| FieldVisitor fv; | |
| MethodVisitor mv; | |
| AnnotationVisitor av0; | |
| cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, "models/rec", null, "java/lang/Object", new String[] { "scala/ScalaObject", "scala/Product", "scala/Serializable" }); | |
| { | |
| av0 = cw.visitAnnotation("Lscala/reflect/ScalaSignature;", true); |
julianpeeters
/ scalaSig
Last active
December 19, 2015 20:49
scala signature of {case class MyRecord()}, ,a base for signature for investigating how to signatures differ depending on the members of a class. best not o look at the numbers, as the gist has been cut and pasted to show the basic structure of a scala sig only.
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| ScalaSig version 5.0 | |
| 0: ClassSymbol(MyRecordA, owner=<empty>, flags=40, info=5 ,None) | |
| 1: MyRecordA | |
| 2: <empty> | |
| 3: <empty> | |
| 4: NoSymbol | |
| 5: ClassInfoType(ClassSymbol(MyRecordA, owner=<empty>, flags=40, info=5 ,None),List(TypeRefType(ThisType(scala),scala.AnyRef,List()), TypeRefType(ThisType(scala),scala.Product,List()), TypeRefType(ThisType(scala),scala.Serializable,List()))) | |
| 6: TypeRefType(ThisType(scala),scala.AnyRef,List()) | |
| 7: ThisType(scala) | |
| 8: scala |
julianpeeters
/ scalaSignature
Created
September 14, 2013 08:17
This is the real pickled signature, presumably encoded from an array that contained a value of 127. I can make a signature, but if mine contains a value of 127, then parsing it fails.
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| val sig = "\u0006\u0001\u0005\rc\u0001B\u0001\u0003\u0001\u0016\u0011\u0001\"T=SK\u000e|'\u000f\u001a\u0006\u0002\u0007\u00051Qn\u001c3fYN\u001c\u0001a\u0005\u0003\u0001\r1y\u0001CA\u0004\u000b\u001b\u0005A!\"A\u0005\u0002\u000bM\u001c\u0017\r\\1\n\u0005-A!AB!osJ+g\r\u0005\u0002\u0008\u001b%\u0011a\u0002\u0003\u0002\u0008!J|G-^2u!\u00099\u0001#\u0003\u0002\u0012\u0011\u0009a1+\u001a:jC2L'0\u00192mK\"A1\u0003\u0001BK\u0002\u0013\u0005A#A\u0001y+\u0005)\u0002C\u0001\u000c\u001a\u001d\u00099q#\u0003\u0002\u0019\u0011\u00051\u0001K]3eK\u001aL!AG\u000e\u0003\rM#(/\u001b8h\u0015\u0009A\u0002\u0002\u0003\u0005\u001e\u0001\u0009E\u0009\u0015!\u0003\u0016\u0003\u0009A\u0008\u0005\u0003\u0005 \u0001\u0009U\r\u0011\"\u0001!\u0003\u0005IX#A\u0011\u0011\u0005\u001d\u0011\u0013BA\u0012\u0009\u0005\rIe\u000e\u001e\u0005\u0009K\u0001\u0011\u0009\u0012)A\u0005C\u0005\u0011\u0011\u0010\u0009\u0005\u0009O\u0001\u0011)\u001a!C\u0001Q\u0005\u0009!0F\u0001*!\u00099!&\u0003\u0002,\u0011\u00099!i\\8mK\u0006t\u0007\u0002C\u0017\u0001 |
julianpeeters
/ Macro Annotation typer error
Created
January 11, 2014 07:03
macro annotation case class provider typer error
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| sbt run | |
| Loading /usr/share/sbt/bin/sbt-launch-lib.bash | |
| [warn] The global sbt directory is now versioned and is located at /home/julianpeeters/.sbt/0.13. | |
| [warn] You are seeing this warning because there is global configuration in /home/julianpeeters/.sbt but not in /home/julianpeeters/.sbt/0.13. | |
| [warn] The global sbt directory may be changed via the sbt.global.base system property. | |
| [info] Loading project definition from /home/julianpeeters/Dropbox/macro-annotation-example/project | |
| [info] Updating {file:/home/julianpeeters/Dropbox/macro-annotation-example/project/}macro-annotation-example-build... | |
| [info] Resolving org.fusesource.jansi#jansi;1.4 ... | |
| [info] Done updating. | |
| [info] Compiling 1 Scala source to /home/julianpeeters/Dropbox/macro-annotation-example/project/target/scala-2.10/sbt-0.13/classes... |
julianpeeters
/ defaultValDef
Created
January 13, 2014 18:01
Preprocess a val def in order to splice it and have it retain a DEFAULTPARAM mod
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| package models | |
| import scala.reflect.macros.Context | |
| import scala.language.experimental.macros | |
| import scala.annotation.StaticAnnotation | |
| import scala.io._ | |
| object helloMacro { |
julianpeeters
/ macroNested
Created
January 13, 2014 18:09
Still need daultparam mod if the type is a nested class?
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| package models | |
| import scala.reflect.macros.Context | |
| import scala.language.experimental.macros | |
| import scala.annotation.StaticAnnotation | |
| import scala.io._ | |
| object nestedInnerMacro { | |
| def impl(c: Context)(annottees: c.Expr[Any]*): c.Expr[Any] = { |
julianpeeters
/ cascadingClusterIssue
Created
February 10, 2014 03:55
vagrant-cascading-hadoop-cluster issue on OSX
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| accipiter:vagrant-cascading-hadoop-cluster julianpeeters$ git pull | |
| Already up-to-date. | |
| accipiter:vagrant-cascading-hadoop-cluster julianpeeters$ git checkout 2.2 | |
| Already on '2.2' | |
| accipiter:vagrant-cascading-hadoop-cluster julianpeeters$ vagrant destroy -f | |
| [master] Destroying VM and associated drives... | |
| [master] Running cleanup tasks for 'puppet' provisioner... | |
| [master] Running cleanup tasks for 'puppet' provisioner... | |
| [master] Running cleanup tasks for 'puppet' provisioner... | |
| [master] Running cleanup tasks for 'puppet' provisioner... |
julianpeeters
/ no-args constructor error pre paradise 2.0.0-M6
Created
March 31, 2014 09:46
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| run | |
| [info] Compiling 1 Scala source to /home/julianpeeters/Dropbox/macro-annotation-example/macros/target/scala-2.10/classes... | |
| [info] Compiling 2 Scala sources to /home/julianpeeters/Dropbox/macro-annotation-example/core/target/scala-2.10/classes... | |
| while compiling: /home/julianpeeters/Dropbox/macro-annotation-example/core/src/main/scala/models/MyRecord.scala | |
| during phase: uncurry | |
| library version: version 2.10.3 | |
| compiler version: version 2.10.3 | |
| reconstructed args: -bootclasspath /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/resources.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/rt.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/jsse.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/jce.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/charsets.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/netx.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/plugin.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/rhino.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/li |
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