问题描述
我正在开发一个简单的 SBT 项目，其中包括用于对 Scala 并行集合进行基准测试的 InputTasks.
I'm developing a simple SBT project that includes InputTasks for benchmarking Scala Parallel collections.
我已经定义了 InputKeys 并在遇到问题时开始编写任务.
I have defined the InputKeys and started writing the tasks when I encountered a problem.
由于我的基准测试需要 Scala 2.10.0-M5，我尝试在我的 build.sbt 中这样做:
Since my benchmarks require Scala 2.10.0-M5, I tried doing this in my build.sbt:
name := "scala-parallel-collection-benchmark"
version := "1.0.0"
organization := "com.google.summer"
scalaVersion := "2.10.0-M5"
但是，在编译时出现以下错误:
However, at compilation I get the following error:
[info] Loading project definition from C:\Users\Administrator\scala-parallel-collection-benchmark\project
[info] Compiling 1 Scala source to C:\Users\Administrator\scala-parallel-collection-benchmark\project\target\scala-2.9.1\sbt-0.11.3\classes...
[error] C:\Users\Administrator\scala-parallel-collection-benchmark\project\Build.scala:47: value tasksupport is not a member of scala.collection.parallel.mutable.ParArray[Int]
[error] collection.tasksupport = new ForkJoinTaskSupport(new ForkJoinPool(par))
[error] ^
[error] one error found
[error] {file:/C:/Users/Administrator/scala-parallel-collection-benchmark/project/}default-e0b2a2/compile:compile: Compilation failed
看来它仍然使用 Scala 2.9.1 来编译它.
It appears that it still uses Scala 2.9.1 to compile it.
如何设置 SBT 以便它使用 Scala 2.10.0-M5 编译我的代码?
How can I set up SBT so it compiles my code using Scala 2.10.0-M5?
推荐答案
scalaVersion 仅影响用于编译实际"源代码(通常位于 src/...).您的错误来自构建定义的一部分(在 project/ 下)，它始终使用构建 sbt 的 Scala 版本进行编译.
scalaVersion only impacts the version of Scala used to compile the "actual" source code (usually located in src/...). Your error comes from a part of the build definition (under project/), which is always compiled with the Scala version that sbt was built with.
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