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ここでは簡単に手助けします。コンパイル時に私は以下のエラーを受け取ります。シンボル 'type shapeless.LeftFolder'がクラスパスにありません
Error:(38, 21) Symbol 'type shapeless.HListerAux' is missing from the classpath.
This symbol is required by 'value spray.routing.directives.ParamDefMagnet2.hla'.
Make sure that type HListerAux is in your classpath and check for conflicting dependencies with `-Ylog-classpath`.
A full rebuild may help if 'ParamDefMagnet2.class' was compiled against an incompatible version of shapeless.
parameter('id) { id =>
Error:(38, 21) Symbol 'type shapeless.Poly.Case2' is missing from the classpath.
This symbol is required by 'method spray.routing.directives.ParamDefMagnet2.MapReduce.from'.
Make sure that type Case2 is in your classpath and check for conflicting dependencies with `-Ylog-classpath`.
A full rebuild may help if 'ParamDefMagnet2.class' was compiled against an incompatible version of shapeless.Poly.
parameter('id) { id =>
Error:(38, 21) Symbol 'type shapeless.PrependAux' is missing from the classpath.
This symbol is required by 'value spray.routing.directives.ParamDefMagnet2.MapReduce.ev'.
Make sure that type PrependAux is in your classpath and check for conflicting dependencies with `-Ylog-classpath`.
A full rebuild may help if 'ParamDefMagnet2.class' was compiled against an incompatible version of shapeless.
parameter('id) { id =>
Error:(38, 21) Symbol 'type shapeless.HListerAux' is missing from the classpath.
This symbol is required by 'value spray.routing.directives.ParamDefMagnet2.hla'.
Make sure that type HListerAux is in your classpath and check for conflicting dependencies with `-Ylog-classpath`.
A full rebuild may help if 'ParamDefMagnet2.class' was compiled against an incompatible version of shapeless.
parameter('id) { id =>
要約すると、問題が
resolvers ++= Seq(
Resolver.sonatypeRepo("releases"),
Resolver.sonatypeRepo("snapshots")
)
libraryDependencies ++= Seq(
"com.chuusai" %% "shapeless" % "2.3.2"
)
、私はすでに（レゾルバ付き）などの依存関係として含まれているライブラリ、「型崩れ」である、が、私は、適切な勧告をいただければ幸いです修正として。