Improve error message

nicolasstucki · nicolasstucki · commit 724bf9c0ca79 · 2018-02-15T11:59:49.000+01:00
diff --git a/compiler/src/dotty/tools/dotc/transform/PostTyper.scala b/compiler/src/dotty/tools/dotc/transform/PostTyper.scala
@@ -317,7 +317,7 @@ class PostTyper extends MacroTransform with IdentityDenotTransformer { thisPhase
       if (tree.symbol.is(Unused) && !ctx.mode.is(Mode.Type)) {
         val msg =
           if (tree.symbol.is(CaseAccessor)) "First parameter list of case class may not contain `unused` parameters"
-          else i"`unused` value $tree can only be used as unused arguments"
+          else i"${tree.symbol} is declared as unused, but is in fact used"
         ctx.error(msg, tree.pos)
       }
     }

Original file line number	Diff line number	Diff line change
`@@ -317,7 +317,7 @@ class PostTyper extends MacroTransform with IdentityDenotTransformer { thisPhase`
`317`	`317`	`if (tree.symbol.is(Unused) && !ctx.mode.is(Mode.Type)) {`
`318`	`318`	`val msg =`
`319`	`319`	if (tree.symbol.is(CaseAccessor)) "First parameter list of case class may not contain `unused` parameters"
`320`		- else i"`unused` value $tree can only be used as unused arguments"
	`320`	`+ else i"${tree.symbol} is declared as unused, but is in fact used"`
`321`	`321`	`ctx.error(msg, tree.pos)`
`322`	`322`	`}`
`323`	`323`	`}`