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Fix #1845: Survive illegal this-type prefixes #1850

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Merged
merged 3 commits into from
Dec 28, 2016
Merged

Fix #1845: Survive illegal this-type prefixes #1850

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9474382
Fix #1845: Survive illegal this-type prefixes
odersky Dec 22, 2016
d9e32dd
Add // error to neg test
odersky Dec 22, 2016
18bc638
Annotate other error line in test
odersky Dec 26, 2016
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4 changes: 3 additions & 1 deletion compiler/src/dotty/tools/dotc/typer/TypeAssigner.scala
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Expand Up @@ -282,7 +282,9 @@ trait TypeAssigner {

def assignType(tree: untpd.This)(implicit ctx: Context) = {
val cls = qualifyingClass(tree, tree.qual.name, packageOK = false)
tree.withType(cls.thisType)
tree.withType(
if (cls.isClass) cls.thisType
else errorType("not a legal qualifying class for this", tree.pos))
}

def assignType(tree: untpd.Super, qual: Tree, inConstrCall: Boolean, mixinClass: Symbol = NoSymbol)(implicit ctx: Context) = {
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3 changes: 3 additions & 0 deletions tests/neg/i1845.scala
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@@ -0,0 +1,3 @@
object Test {
type X = FooBar22.this // error
} // error