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Router: use template to break before extends #3581

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Jul 7, 2023
Merged

Router: use template to break before extends #3581

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7 changes: 7 additions & 0 deletions scalafmt-core/shared/src/main/scala/org/scalafmt/internal/FormatOps.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -374,6 +374,13 @@ class FormatOps(
new Policy.Delay(policy, Policy.End.Before(from))
}

val WithTemplateOnLeft = new ExtractFromMeta(ft =>
ft.meta.leftOwner match {
case lo: Stat.WithTemplate => Some(lo.templ)
case _ => None
}
)

def templateCurlyFt(template: Template): Option[FormatToken] =
getStartOfTemplateBody(template).map(tokenBefore)

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14 changes: 5 additions & 9 deletions scalafmt-core/shared/src/main/scala/org/scalafmt/internal/Router.scala
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Expand Up @@ -817,14 +817,10 @@ class Router(formatOps: FormatOps) {
case FormatToken(
_: T.KwObject | _: T.KwClass | _: T.KwTrait | _: T.KwEnum,
_,
_
WithTemplateOnLeft(template)
) =>
def expire = defnTemplate(leftOwner)
.flatMap {
getTemplateGroups(_).flatMap(
_.lastOption.flatMap(_.headOption.flatMap(_.tokens.headOption))
)
}
def expire = getTemplateGroups(template)
.flatMap(_.last.headOption.flatMap(_.tokens.headOption))
.getOrElse(getLastToken(leftOwner))
def forceNewlineBeforeExtends = Policy.before(expire) {
case Decision(FormatToken(_, soft.ExtendsOrDerives(), m), s)
Expand All @@ -834,8 +830,8 @@ class Router(formatOps: FormatOps) {
val policy =
if (style.binPack.keepParentConstructors) None
else
defnBeforeTemplate(leftOwner).map { x =>
val policyEnd = Policy.End.On(x.tokens.last)
template.tokens.headOption.map { head =>
val policyEnd = Policy.End.Before(head)
delayedBreakPolicy(policyEnd)(forceNewlineBeforeExtends)
}
Seq(Split(Space, 0).withPolicyOpt(policy))
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10 changes: 0 additions & 10 deletions scalafmt-core/shared/src/main/scala/org/scalafmt/util/TokenOps.scala
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Expand Up @@ -123,16 +123,6 @@ object TokenOps {
case _ => None
}

def defnBeforeTemplate(tree: Tree): Option[Tree] =
tree match {
case t: Defn.Object => Some(t.name)
case t: Defn.Class => Some(t.ctor)
case t: Defn.Trait => Some(t.ctor)
case t: Defn.Enum => Some(t.ctor)
case t: Pkg.Object => Some(t.name)
case _ => None
}

val formatOnCode = Set(
"@formatter:on", // IntelliJ
"format: on" // scalariform
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