Effects Plugin for Scala
This repo holds the source of a Scala compiler plugin for effect checking. For documentation refer to the Wiki on Github.
master branch of this repository builds against Scala 2.10.1.
In the upcoming Scala 2.11 (the
master branch of the the
scala/scala repository), templates and constructors have a slightly different tree representation. The
scala-2.11 should take that into account (it is not up to date though, the main branch might not merge cleanly into it, and it's not tested)
sbt package. The resulting
target/scala-2.10/effects-plugin_2.10-0.1-SNAPSHOT.jar file is a compiler plugin that can be used with the Scala 2.10.1 compiler (the Wiki explains how).
Running the Tests
The tests for the plugin are in a separate sbt project: the reason is that we first need
to build the compiler plugin (done in sbt project
effects-plugin) and then run the tests
using the plugin
.jar file (sbt project
Therefore, use the sbt command
tests/test to run the tests. For details on the testing framework check the Wiki.
tsf-444-wpa-1-227:src luc$ ~/scala/scala-2.10.1/bin/scalac -P:effects:domains:purity:exceptions:io -Xplugin:/Users/luc/scala/efftp/target/scala-2.10/effects-plugin_2.10-0.1-SNAPSHOT.jar -cp /Users/luc/scala/efftp/target/scala-2.10/effects-plugin_2.10-0.1-SNAPSHOT.jar T.scala T.scala:10: error: effect type mismatch; found : @io required: @noIo println() ^ T.scala:18: error: effect type mismatch; found : @mod(C.this) @loc(any) required: @mod(x$1$2) @assign(x$1$2,any) @loc(any) @mod(C.this) does not conform to @mod(x$1$2) def incBad(): Unit @mod() = x = x + 1 ^ T.scala:24: error: effect type mismatch; found : @mod() @loc() @throws[C.this.E1] @noIo required: @mod(any) @assign(any) @loc(any) @throws[Nothing] @io @throws[C.this.E1] does not conform to @throws[Nothing] def bad(): Int @throws[Nothing] = throw new E1 ^ three errors found