Scala example source code file (tcpoly_variance_enforce.check)

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Java - Scala tags/keywords

any, foocontra, foocontra's, foocov, fooinvar, fooinvar, fooinvar's, foostring, foostring, foostring's, nothing, nothing, string, string

The Scala tcpoly_variance_enforce.check source code

tcpoly_variance_enforce.scala:15: error: kinds of the type arguments (FooInvar) do not conform to the expected kinds of the type parameters (type m) in trait coll.
FooInvar's type parameters do not match type m's expected parameters: type x (in class FooInvar) is invariant, but type x is declared covariant
object fcollinv extends coll[FooInvar]      // error
                        ^
tcpoly_variance_enforce.scala:16: error: kinds of the type arguments (FooContra) do not conform to the expected kinds of the type parameters (type m) in trait coll.
FooContra's type parameters do not match type m's expected parameters: type x (in class FooContra) is contravariant, but type x is declared covariant
object fcollcon extends coll[FooContra]     // error
                        ^
tcpoly_variance_enforce.scala:17: error: kinds of the type arguments (FooString) do not conform to the expected kinds of the type parameters (type m) in trait coll.
FooString's type parameters do not match type m's expected parameters: type x (in class FooString)'s bounds >: Nothing <: String are stricter than type x's declared bounds >: Nothing <: Any
object fcollwb extends coll[FooString]      // error
                       ^
tcpoly_variance_enforce.scala:19: error: kinds of the type arguments (FooCov) do not conform to the expected kinds of the type parameters (type m) in trait coll2.
FooCov's type parameters do not match type m's expected parameters: type x (in class FooCov) is covariant, but type x is declared contravariant
object fcoll2ok extends coll2[FooCov]       // error
                        ^
tcpoly_variance_enforce.scala:20: error: kinds of the type arguments (FooInvar) do not conform to the expected kinds of the type parameters (type m) in trait coll2.
FooInvar's type parameters do not match type m's expected parameters: type x (in class FooInvar) is invariant, but type x is declared contravariant
object fcoll2inv extends coll2[FooInvar]    // error
                         ^
tcpoly_variance_enforce.scala:22: error: kinds of the type arguments (FooString) do not conform to the expected kinds of the type parameters (type m) in trait coll2.
FooString's type parameters do not match type m's expected parameters: type x (in class FooString) is covariant, but type x is declared contravarianttype x (in class FooString)'s bounds >: Nothing <: String are stricter than type x's declared bounds >: Nothing <: Any
object fcoll2wb extends coll2[FooString]      // error
                        ^
tcpoly_variance_enforce.scala:27: error: kinds of the type arguments (FooString) do not conform to the expected kinds of the type parameters (type m) in trait coll3.
FooString's type parameters do not match type m's expected parameters: type x (in class FooString)'s bounds >: Nothing <: String are stricter than type x's declared bounds >: Nothing <: Any
object fcoll3wb extends  coll3[FooString]   // error
                         ^
tcpoly_variance_enforce.scala:30: error: kinds of the type arguments (FooString,Int) do not conform to the expected kinds of the type parameters (type m,type y) in trait coll4.
FooString's type parameters do not match type m's expected parameters: type x (in class FooString)'s bounds >: Nothing <: String are stricter than type x's declared bounds >: Nothing <: y
object fcoll4_1 extends  coll4[FooString, Int] // error
                         ^
tcpoly_variance_enforce.scala:31: error: kinds of the type arguments (FooString,Any) do not conform to the expected kinds of the type parameters (type m,type y) in trait coll4.
FooString's type parameters do not match type m's expected parameters: type x (in class FooString)'s bounds >: Nothing <: String are stricter than type x's declared bounds >: Nothing <: y
object fcoll4_2 extends  coll4[FooString, Any] // error
                         ^
tcpoly_variance_enforce.scala:37: error: kinds of the type arguments (FooInvar) do not conform to the expected kinds of the type parameters (type m) in trait coll.
FooInvar's type parameters do not match type m's expected parameters: type x (in class FooInvar) is invariant, but type x is declared covariant
  def x: coll[FooInvar] = sys.error("foo") // error
         ^
tcpoly_variance_enforce.scala:38: error: kinds of the type arguments (FooContra) do not conform to the expected kinds of the type parameters (type m) in trait coll.
FooContra's type parameters do not match type m's expected parameters: type x (in class FooContra) is contravariant, but type x is declared covariant
  def y: coll[FooContra] = sys.error("foo") // error
         ^
11 errors found