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RsCachedTypeAlias.kt
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RsCachedTypeAlias.kt
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/*
* Use of this source code is governed by the MIT license that can be
* found in the LICENSE file.
*/
package org.rust.lang.core.resolve
import org.rust.lang.core.crate.Crate
import org.rust.lang.core.psi.RsTypeAlias
import org.rust.lang.core.psi.ext.RsAbstractableOwner
import org.rust.lang.core.psi.ext.RsTypeAliasImplMixin
import org.rust.lang.core.psi.ext.owner
import org.rust.lang.core.psi.isValidProjectMemberAndContainingCrate
import org.rust.lang.core.types.consts.CtConstParameter
import org.rust.lang.core.types.infer.constGenerics
import org.rust.lang.core.types.infer.generics
import org.rust.lang.core.types.ty.Ty
import org.rust.lang.core.types.ty.TyTypeParameter
import kotlin.LazyThreadSafetyMode.PUBLICATION
/**
* Used for optimization purposes, to reduce access to cache and PSI tree in some very hot places,
* [ImplLookup.processTyFingerprintsWithAliases] in particular
*/
class RsCachedTypeAlias(
val alias: RsTypeAlias
) {
val name: String? = alias.name
val isFreeAndValid: Boolean
val containingCrate: Crate?
val containingCrates: List<Crate>
init {
val (isValid, crate, crates) = alias.isValidProjectMemberAndContainingCrate
this.containingCrate = crate
this.containingCrates = crates
this.isFreeAndValid = isValid
&& name != null
&& alias.owner is RsAbstractableOwner.Free
}
val typeAndGenerics: Triple<Ty, List<TyTypeParameter>, List<CtConstParameter>> by lazy(PUBLICATION) {
Triple(alias.declaredType, alias.generics, alias.constGenerics)
}
companion object {
fun forAlias(alias: RsTypeAlias): RsCachedTypeAlias {
return (alias as RsTypeAliasImplMixin).cachedImplItem.value
}
}
}