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Backport "fix: make vals created in desugaring of n-ary lambdas non-synthetic" to 3.3 LTS #589

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Backport "fix: make vals created in desugaring of n-ary lambdas non-synthetic" to 3.3 LTS #589

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1 change: 0 additions & 1 deletion compiler/src/dotty/tools/dotc/ast/Desugar.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -1526,7 +1526,6 @@ object desugar {
ValDef(param.name, param.tpt, selector(idx))
.withSpan(param.span)
.withAttachment(UntupledParam, ())
.withFlags(Synthetic)
}
Function(param :: Nil, Block(vdefs, body))
}
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2 changes: 1 addition & 1 deletion presentation-compiler/src/main/dotty/tools/pc/PcConvertToNamedLambdaParameters.scala
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Expand Up @@ -120,7 +120,7 @@ object PcConvertToNamedLambdaParameters:
}

def isWildcardParam(param: tpd.ValDef)(using Context): Boolean =
param.name.toString.startsWith("_$") && param.symbol.is(Flags.Synthetic)
param.name.toString.startsWith("_$")

def findParamReferencePosition(param: tpd.ValDef, lambda: tpd.Tree)(using Context): Option[SourcePosition] =
var pos: Option[SourcePosition] = None
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12 changes: 12 additions & 0 deletions presentation-compiler/test/dotty/tools/pc/tests/hover/HoverTermSuite.scala
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Expand Up @@ -6,6 +6,18 @@ import org.junit.Test

class HoverTermSuite extends BaseHoverSuite:

@Test def `n-ary lamba` =
check(
"""|object testRepor {
| val listOfTuples = List(1 -> 1, 2 -> 2, 3 -> 3)
|
| listOfTuples.map((k@@ey, value) => key + value)
|}
|""".stripMargin,
"""|val key: Int
|""".stripMargin.hover
)

@Test def `map` =
check(
"""object a {
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