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FIR: Fix 2^n transform complexity in blocks/whens

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Simon Ogorodnik
2019-03-20 19:16:54 +03:00
parent 6799eeb084
commit 3e7e9269ab
1 changed files with 4 additions and 5 deletions
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compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirBodyResolveTransformer.kt
+4 -5
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@@ -257,8 +257,7 @@ open class FirBodyResolveTransformer(val session: FirSession, val implicitTypeOn
override fun transformBlock(block: FirBlock, data: Any?): CompositeTransformResult<FirStatement> {
block.transformChildren(this, data)
val block = super.transformBlock(block, data).single as FirBlock
val statement = block.statements.lastOrNull()
val resultExpression = when (statement) {
@@ -267,7 +266,7 @@ open class FirBodyResolveTransformer(val session: FirSession, val implicitTypeOn
else -> null
}
resultExpression?.resultType?.let { bindingContext[block] = it }
return super.transformBlock(block, data)
return block.compose()
}
private fun commonSuperType(types: List<FirTypeRef>): FirTypeRef? {
@@ -275,12 +274,12 @@ open class FirBodyResolveTransformer(val session: FirSession, val implicitTypeOn
}
override fun transformWhenExpression(whenExpression: FirWhenExpression, data: Any?): CompositeTransformResult<FirStatement> {
val whenExpression = super.transformWhenExpression(whenExpression, data).single as FirWhenExpression
val type = commonSuperType(whenExpression.branches.mapNotNull {
it.result.visitNoTransform(this, data)
it.result.resultType
})
if (type != null) bindingContext[whenExpression] = type
return super.transformWhenExpression(whenExpression, data)
return whenExpression.compose()
}
override fun <T> transformConstExpression(constExpression: FirConstExpression<T>, data: Any?): CompositeTransformResult<FirStatement> {