diff options
-rw-r--r-- | src/compiler/scala/tools/nsc/transform/patmat/Logic.scala | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/compiler/scala/tools/nsc/transform/patmat/Logic.scala b/src/compiler/scala/tools/nsc/transform/patmat/Logic.scala index 9f24d5122a..da6527bc0b 100644 --- a/src/compiler/scala/tools/nsc/transform/patmat/Logic.scala +++ b/src/compiler/scala/tools/nsc/transform/patmat/Logic.scala @@ -122,9 +122,20 @@ trait Logic extends Debugging { // symbols are propositions final class Sym private[PropositionalLogic] (val variable: Var, val const: Const) extends Prop { + + override def equals(other: scala.Any): Boolean = other match { + case that: Sym => this.variable == that.variable && + this.const == that.const + case _ => false + } + + override def hashCode(): Int = { + variable.hashCode * 41 + const.hashCode + } + private val id: Int = Sym.nextSymId - override def toString = variable + "=" + const + "#" + id + override def toString = s"$variable=$const#$id" } object Sym { |