我必须使用运行时Scala反射来解析任意代码。根据API,ToolBox.parse(code: String)
应该可以解决问题,但是如果要解析的代码包含package
关键字,则失败
有一个issue,应该在此pull中解决。但是,我正在使用Scala 2.12.8
,但仍然存在此问题。这是我的代码:
val toolbox = runtimeMirror(getClass.getClassLoader).mkToolBox()
val content ="""package io.core
|trait Test{}""".stripMargin
val ast = toolbox.parse(content)
失败的原因:
reflective compilation has failed:
'{' expected.
scala.tools.reflect.ToolBoxError: reflective compilation has failed:
'{' expected.
at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl$ToolBoxGlobal.throwIfErrors(ToolBoxFactory.scala:331)
at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl$ToolBoxGlobal.parse(ToolBoxFactory.scala:306)
at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl.$anonfun$parse$1(ToolBoxFactory.scala:432)
at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl$withCompilerApi$.apply(ToolBoxFactory.scala:370)
at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl.parse(ToolBoxFactory.scala:429)
at io.sam.core.ReflectSpec.ReflectSpec.$anonfun$new$1(ReflectSpec.scala:20)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:83)
at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
at org.scalatest.Transformer.apply(Transformer.scala:22)
at org.scalatest.Transformer.apply(Transformer.scala:20)
at org.scalatest.FlatSpecLike$$anon$1.apply(FlatSpecLike.scala:1682)
at org.scalatest.TestSuite.withFixture(TestSuite.scala:196)
at org.scalatest.TestSuite.withFixture$(TestSuite.scala:195)
at org.scalatest.FlatSpec.withFixture(FlatSpec.scala:1685)
at org.scalatest.FlatSpecLike.invokeWithFixture$1(FlatSpecLike.scala:1680)
at org.scalatest.FlatSpecLike.$anonfun$runTest$1(FlatSpecLike.scala:1692)
at org.scalatest.SuperEngine.runTestImpl(Engine.scala:289)
at org.scalatest.FlatSpecLike.runTest(FlatSpecLike.scala:1692)
at org.scalatest.FlatSpecLike.runTest$(FlatSpecLike.scala:1674)
at org.scalatest.FlatSpec.runTest(FlatSpec.scala:1685)
at org.scalatest.FlatSpecLike.$anonfun$runTests$1(FlatSpecLike.scala:1750)
at org.scalatest.SuperEngine.$anonfun$runTestsInBranch$1(Engine.scala:396)
at scala.collection.immutable.List.foreach(List.scala:392)
at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:384)
at org.scalatest.SuperEngine.runTestsInBranch(Engine.scala:373)
at org.scalatest.SuperEngine.$anonfun$runTestsInBranch$1(Engine.scala:410)
at scala.collection.immutable.List.foreach(List.scala:392)
at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:384)
at org.scalatest.SuperEngine.runTestsInBranch(Engine.scala:379)
at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:461)
at org.scalatest.FlatSpecLike.runTests(FlatSpecLike.scala:1750)
at org.scalatest.FlatSpecLike.runTests$(FlatSpecLike.scala:1749)
at org.scalatest.FlatSpec.runTests(FlatSpec.scala:1685)
at org.scalatest.Suite.run(Suite.scala:1147)
at org.scalatest.Suite.run$(Suite.scala:1129)
at org.scalatest.FlatSpec.org$scalatest$FlatSpecLike$$super$run(FlatSpec.scala:1685)
at org.scalatest.FlatSpecLike.$anonfun$run$1(FlatSpecLike.scala:1795)
at org.scalatest.SuperEngine.runImpl(Engine.scala:521)
at org.scalatest.FlatSpecLike.run(FlatSpecLike.scala:1795)
at org.scalatest.FlatSpecLike.run$(FlatSpecLike.scala:1793)
at org.scalatest.FlatSpec.run(FlatSpec.scala:1685)
at org.scalatest.tools.SuiteRunner.run(SuiteRunner.scala:45)
at org.scalatest.tools.Runner$.$anonfun$doRunRunRunDaDoRunRun$13(Runner.scala:1346)
at org.scalatest.tools.Runner$.$anonfun$doRunRunRunDaDoRunRun$13$adapted(Runner.scala:1340)
at scala.collection.immutable.List.foreach(List.scala:392)
at org.scalatest.tools.Runner$.doRunRunRunDaDoRunRun(Runner.scala:1340)
at org.scalatest.tools.Runner$.$anonfun$runOptionallyWithPassFailReporter$24(Runner.scala:1031)
at org.scalatest.tools.Runner$.$anonfun$runOptionallyWithPassFailReporter$24$adapted(Runner.scala:1010)
at org.scalatest.tools.Runner$.withClassLoaderAndDispatchReporter(Runner.scala:1506)
at org.scalatest.tools.Runner$.runOptionallyWithPassFailReporter(Runner.scala:1010)
at org.scalatest.tools.Runner$.run(Runner.scala:850)
at org.scalatest.tools.Runner.run(Runner.scala)
at org.jetbrains.plugins.scala.testingSupport.scalaTest.ScalaTestRunner.runScalaTest2(ScalaTestRunner.java:131)
at org.jetbrains.plugins.scala.testingSupport.scalaTest.ScalaTestRunner.main(ScalaTestRunner.java:28)
一种解决方法似乎是将{}
添加到package关键字。但这是一种解决方法,我不应该编辑给定的源代码。此外,此替代方法可以解决解析问题,但是在typeCheck
AST时失败,如下所示:
val toolbox = runtimeMirror(getClass.getClassLoader).mkToolBox()
val content ="""package io.core{
| trait Test{}
|}""".stripMargin
val ast = toolbox.parse(content)
toolbox.typecheck(ast)
错误:
assertion failed:
value <local <expression-owner>>
while compiling: <no file>
during phase: typer
library version: version 2.12.8
compiler version: version 2.12.8
reconstructed args:
last tree to typer: Block
tree position: <unknown>
symbol: null
call site: package <root> in <none>
== Source file context for tree position ==
java.lang.AssertionError: assertion failed:
value <local <expression-owner>>
while compiling: <no file>
during phase: typer
library version: version 2.12.8
compiler version: version 2.12.8
reconstructed args:
last tree to typer: Block
tree position: <unknown>
symbol: null
call site: package <root> in <none>
== Source file context for tree position ==
有什么办法解决这个问题吗?根据请求请求,必须从Scala package
添加对2.11.0
关键字的支持。我的代码有任何错误吗?
预先感谢