/
ScMethodType.scala
376 lines (333 loc) · 15.3 KB
/
ScMethodType.scala
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package org.jetbrains.plugins.scala
package lang.psi.types.nonvalue
import com.intellij.openapi.project.Project
import com.intellij.psi.search.GlobalSearchScope
import com.intellij.psi.{PsiElement, PsiParameter, PsiTypeParameter}
import org.jetbrains.plugins.scala.extensions.PsiParameterExt
import org.jetbrains.plugins.scala.lang.psi.ScalaPsiUtil
import org.jetbrains.plugins.scala.lang.psi.api.statements.params.{ScParameter, ScTypeParam}
import org.jetbrains.plugins.scala.lang.psi.impl.ScalaPsiManager
import org.jetbrains.plugins.scala.lang.psi.types._
import org.jetbrains.plugins.scala.lang.psi.types.result.TypingContext
import scala.collection.immutable.{HashMap, HashSet}
/**
* @author ilyas
*/
/**
* This is internal type, no expression can have such type.
*/
trait NonValueType extends ScType {
def isValue = false
}
/**
* Generalized parameter. It's not psi element. So can be used in any place.
* Some difference
*/
case class Parameter(name: String, deprecatedName: Option[String], paramType: ScType, expectedType: ScType,
isDefault: Boolean, isRepeated: Boolean, isByName: Boolean,
index: Int = -1, psiParam: Option[PsiParameter] = None, defaultType: Option[ScType] = None) {
def this(name: String, deprecatedName: Option[String], paramType: ScType,
isDefault: Boolean, isRepeated: Boolean, isByName: Boolean, index: Int) {
this(name, deprecatedName, paramType, paramType, isDefault, isRepeated, isByName, index)
}
def this(param: ScParameter) {
this(param.name, param.deprecatedName, param.getType(TypingContext.empty).getOrNothing, param.getType(TypingContext.empty).getOrNothing,
param.isDefaultParam, param.isRepeatedParameter, param.isCallByNameParameter, param.index, Some(param), param.getDefaultExpression.flatMap(_.getType().toOption))
}
def this(param: PsiParameter) {
this(param.getName, None, param.paramType, param.paramType, false, param.isVarArgs, false, param.index, Some(param))
}
def paramInCode: Option[ScParameter] = psiParam match {
case Some(scParam: ScParameter) => Some(scParam)
case _ => None
}
def nameInCode = psiParam.map(_.getName)
}
/**
* Class representing type parameters in our type system. Can be constructed from psi.
* todo: lower and upper types will be reevaluated many times, is it good or bad? Seems bad. What other ways to fix SCL-7216?
* @param lowerType important to be lazy, see SCL-7216
* @param upperType important to be lazy, see SCL-7216
*/
class TypeParameter(val name: String, val typeParams: Seq[TypeParameter], val lowerType: () => ScType,
val upperType: () => ScType, val ptp: PsiTypeParameter) {
def this(ptp: PsiTypeParameter) {
this(ptp match {
case tp: ScTypeParam => tp.name
case _ => ptp.getName
}, ptp match {
case tp: ScTypeParam => tp.typeParameters.map(new TypeParameter(_))
case _ => Seq.empty
}, ptp match {
case tp: ScTypeParam => () => tp.lowerBound.getOrNothing
case _ => () => Nothing //todo: lower type?
}, ptp match {
case tp: ScTypeParam => () => tp.upperBound.getOrAny
case _ => () => Any //todo: upper type?
}, ptp)
}
def update(fun: ScType => ScType): TypeParameter = {
new TypeParameter(name, typeParams.map(_.update(fun)), {
val res = fun(lowerType())
() => res
}, {
val res = fun(upperType())
() => res
}, ptp)
}
def canEqual(other: Any): Boolean = other.isInstanceOf[TypeParameter]
override def equals(other: Any): Boolean = other match {
case that: TypeParameter =>
(that canEqual this) &&
name == that.name &&
typeParams == that.typeParams &&
lowerType() == that.lowerType() &&
upperType() == that.upperType() &&
ptp == that.ptp
case _ => false
}
override def hashCode(): Int = {
val state = Seq(name, typeParams, ptp)
state.map(_.hashCode()).foldLeft(0)((a, b) => 31 * a + b)
}
}
object TypeParameter {
def apply(name: String, typeParams: Seq[TypeParameter], lowerType: () => ScType, upperType: () => ScType,
ptp: PsiTypeParameter): TypeParameter = {
new TypeParameter(name, typeParams, lowerType, upperType, ptp)
}
def unapply(t: TypeParameter): Option[(String, Seq[TypeParameter], () => ScType, () => ScType, PsiTypeParameter)] = {
Some(t.name, t.typeParams, t.lowerType, t.upperType, t.ptp)
}
def fromArray(ptps: Array[PsiTypeParameter]): Array[TypeParameter] = {
if (ptps.length == 0) EMPTY_ARRAY
else ptps.map(new TypeParameter(_))
}
val EMPTY_ARRAY: Array[TypeParameter] = Array.empty
}
case class ScMethodType(returnType: ScType, params: Seq[Parameter], isImplicit: Boolean)
(val project: Project, val scope: GlobalSearchScope) extends NonValueType {
def visitType(visitor: ScalaTypeVisitor) {
visitor.visitMethodType(this)
}
override def typeDepth: Int = returnType.typeDepth
def inferValueType: ValueType = {
ScFunctionType(returnType.inferValueType, params.map(p => {
val inferredParamType = p.paramType.inferValueType
if (!p.isRepeated) inferredParamType
else {
val seqClass = ScalaPsiManager.instance(project).getCachedClass(scope, "scala.collection.Seq")
seqClass.fold(inferredParamType) { inferred =>
ScParameterizedType(ScDesignatorType(inferred), Seq(inferredParamType))
}
}
}))(project, scope)
}
override def removeAbstracts = new ScMethodType(returnType.removeAbstracts,
params.map(p => p.copy(paramType = p.paramType.removeAbstracts)), isImplicit)(project, scope)
override def recursiveUpdate(update: ScType => (Boolean, ScType), visited: HashSet[ScType]): ScType = {
if (visited.contains(this)) {
return update(this) match {
case (true, res) => res
case _ => this
}
}
val newVisited = visited + this
update(this) match {
case (true, res) => res
case _ =>
new ScMethodType(returnType.recursiveUpdate(update, newVisited),
params.map(p => p.copy(paramType = p.paramType.recursiveUpdate(update, newVisited))), isImplicit)(project, scope)
}
}
override def recursiveVarianceUpdateModifiable[T](data: T, update: (ScType, Int, T) => (Boolean, ScType, T),
variance: Int = 1): ScType = {
update(this, variance, data) match {
case (true, res, _) => res
case (_, _, newData) =>
new ScMethodType(returnType.recursiveVarianceUpdateModifiable(newData, update, variance),
params.map(p => p.copy(paramType = p.paramType.recursiveVarianceUpdateModifiable(newData, update, -variance))),
isImplicit)(project, scope)
}
}
override def equivInner(r: ScType, uSubst: ScUndefinedSubstitutor, falseUndef: Boolean): (Boolean, ScUndefinedSubstitutor) = {
var undefinedSubst = uSubst
r match {
case m: ScMethodType =>
if (m.params.length != params.length) return (false, undefinedSubst)
var t = Equivalence.equivInner(m.returnType, returnType,undefinedSubst, falseUndef)
if (!t._1) return (false, undefinedSubst)
undefinedSubst = t._2
var i = 0
while (i < params.length) {
//todo: Seq[Type] instead of Type*
if (params(i).isRepeated != m.params(i).isRepeated) return (false, undefinedSubst)
t = Equivalence.equivInner(params(i).paramType, m.params(i).paramType, undefinedSubst, falseUndef)
if (!t._1) return (false, undefinedSubst)
undefinedSubst = t._2
i = i + 1
}
(true, undefinedSubst)
case _ => (false, undefinedSubst)
}
}
}
case class ScTypePolymorphicType(internalType: ScType, typeParameters: Seq[TypeParameter]) extends NonValueType {
if (internalType.isInstanceOf[ScTypePolymorphicType]) {
throw new IllegalArgumentException("Polymorphic type can't have wrong internal type")
}
def polymorphicTypeSubstitutor: ScSubstitutor = polymorphicTypeSubstitutor(inferValueType = false)
def polymorphicTypeSubstitutor(inferValueType: Boolean): ScSubstitutor =
new ScSubstitutor(new HashMap[(String, PsiElement), ScType] ++ typeParameters.map(tp => {
var contraVariant = 0
var coOrInVariant = 0
internalType.recursiveVarianceUpdate {
case (typez: ScType, i: Int) =>
val pair = typez match {
case tp: ScTypeParameterType => (tp.name, ScalaPsiUtil.getPsiElementId(tp.param))
case ScUndefinedType(tp) => (tp.name, ScalaPsiUtil.getPsiElementId(tp.param))
case ScAbstractType(tp, _, _) => (tp.name, ScalaPsiUtil.getPsiElementId(tp.param))
case _ => null
}
if (pair != null) {
val (tpName, id) = pair
if (tp.name == tpName && id == ScalaPsiUtil.getPsiElementId(tp.ptp)) {
if (i == -1) contraVariant += 1
else coOrInVariant += 1
}
}
(false, typez)
}
if (coOrInVariant == 0 && contraVariant != 0)
((tp.name, ScalaPsiUtil.getPsiElementId(tp.ptp)), tp.upperType().inferValueType)
else
((tp.name, ScalaPsiUtil.getPsiElementId(tp.ptp)), tp.lowerType().inferValueType)
}), Map.empty, None)
def abstractTypeSubstitutor: ScSubstitutor = {
def hasRecursiveTypeParameters(typez: ScType): Boolean = {
var hasRecursiveTypeParameters = false
typez.recursiveUpdate {
case tpt: ScTypeParameterType =>
typeParameters.find(tp => (tp.name, ScalaPsiUtil.getPsiElementId(tp.ptp)) == (tpt.name, tpt.getId)) match {
case None => (true, tpt)
case _ =>
hasRecursiveTypeParameters = true
(true, tpt)
}
case tp: ScType => (hasRecursiveTypeParameters, tp)
}
hasRecursiveTypeParameters
}
new ScSubstitutor(new HashMap[(String, PsiElement), ScType] ++ typeParameters.map(tp => {
val lowerType: ScType = if (hasRecursiveTypeParameters(tp.lowerType())) Nothing else tp.lowerType()
val upperType: ScType = if (hasRecursiveTypeParameters(tp.upperType())) Any else tp.upperType()
((tp.name, ScalaPsiUtil.getPsiElementId(tp.ptp)),
new ScAbstractType(new ScTypeParameterType(tp.ptp, ScSubstitutor.empty), lowerType, upperType))
}), Map.empty, None)
}
def abstractOrLowerTypeSubstitutor: ScSubstitutor = {
def hasRecursiveTypeParameters(typez: ScType): Boolean = {
var hasRecursiveTypeParameters = false
typez.recursiveUpdate {
case tpt: ScTypeParameterType =>
typeParameters.find(tp => (tp.name, ScalaPsiUtil.getPsiElementId(tp.ptp)) == (tpt.name, tpt.getId)) match {
case None => (true, tpt)
case _ =>
hasRecursiveTypeParameters = true
(true, tpt)
}
case tp: ScType => (hasRecursiveTypeParameters, tp)
}
hasRecursiveTypeParameters
}
new ScSubstitutor(new HashMap[(String, PsiElement), ScType] ++ typeParameters.map(tp => {
val lowerType: ScType = if (hasRecursiveTypeParameters(tp.lowerType())) Nothing else tp.lowerType()
val upperType: ScType = if (hasRecursiveTypeParameters(tp.upperType())) Any else tp.upperType()
((tp.name, ScalaPsiUtil.getPsiElementId(tp.ptp)),
if (lowerType.equiv(Nothing)) new ScAbstractType(new ScTypeParameterType(tp.ptp, ScSubstitutor.empty), lowerType, upperType)
else lowerType)
}), Map.empty, None)
}
def typeParameterTypeSubstitutor: ScSubstitutor =
new ScSubstitutor(new HashMap[(String, PsiElement), ScType] ++ typeParameters.map { tp =>
((tp.name, ScalaPsiUtil.getPsiElementId(tp.ptp)), new ScTypeParameterType(tp.ptp, ScSubstitutor.empty))
}, Map.empty, None)
def inferValueType: ValueType = {
polymorphicTypeSubstitutor(inferValueType = true).subst(internalType.inferValueType).asInstanceOf[ValueType]
}
override def removeAbstracts = ScTypePolymorphicType(internalType.removeAbstracts, typeParameters.map(tp => {
TypeParameter(tp.name, tp.typeParams /* todo: ? */, () => tp.lowerType().removeAbstracts,
() => tp.upperType().removeAbstracts, tp.ptp)
}))
override def recursiveUpdate(update: ScType => (Boolean, ScType), visited: HashSet[ScType]): ScType = {
if (visited.contains(this)) {
return update(this) match {
case (true, res) => res
case _ => this
}
}
val newVisited = visited + this
update(this) match {
case (true, res) => res
case _ =>
ScTypePolymorphicType(internalType.recursiveUpdate(update, newVisited), typeParameters.map(tp => {
TypeParameter(tp.name, tp.typeParams /* todo: ? */, {
val res = tp.lowerType().recursiveUpdate(update, newVisited)
() => res
}, {
val res = tp.upperType().recursiveUpdate(update, newVisited)
() => res
}, tp.ptp)
}))
}
}
override def recursiveVarianceUpdateModifiable[T](data: T, update: (ScType, Int, T) => (Boolean, ScType, T),
variance: Int = 1): ScType = {
update(this, variance, data) match {
case (true, res, _) => res
case (_, _, newData) =>
ScTypePolymorphicType(internalType.recursiveVarianceUpdateModifiable(newData, update, variance), typeParameters.map(tp => {
TypeParameter(tp.name, tp.typeParams /* todo: ? */,
() => tp.lowerType().recursiveVarianceUpdateModifiable(newData, update, -variance),
() => tp.upperType().recursiveVarianceUpdateModifiable(newData, update, variance), tp.ptp)
}))
}
}
override def equivInner(r: ScType, uSubst: ScUndefinedSubstitutor,
falseUndef: Boolean): (Boolean, ScUndefinedSubstitutor) = {
var undefinedSubst = uSubst
r match {
case p: ScTypePolymorphicType =>
if (typeParameters.length != p.typeParameters.length) return (false, undefinedSubst)
var i = 0
while (i < typeParameters.length) {
var t = Equivalence.equivInner(typeParameters(i).lowerType(),
p.typeParameters(i).lowerType(), undefinedSubst, falseUndef)
if (!t._1) return (false,undefinedSubst)
undefinedSubst = t._2
t = Equivalence.equivInner(typeParameters(i).upperType(),
p.typeParameters(i).upperType(), undefinedSubst, falseUndef)
if (!t._1) return (false, undefinedSubst)
undefinedSubst = t._2
i = i + 1
}
val subst = new ScSubstitutor(new collection.immutable.HashMap[(String, PsiElement), ScType] ++
typeParameters.zip(p.typeParameters).map({
tuple => ((tuple._1.name, ScalaPsiUtil.getPsiElementId(tuple._1.ptp)), new ScTypeParameterType(tuple._2.name,
tuple._2.ptp match {
case p: ScTypeParam => p.typeParameters.toList.map{new ScTypeParameterType(_, ScSubstitutor.empty)}
case _ => Nil
}, new Suspension(tuple._2.lowerType), new Suspension(tuple._2.upperType), tuple._2.ptp))
}), Map.empty, None)
Equivalence.equivInner(subst.subst(internalType), p.internalType, undefinedSubst, falseUndef)
case _ => (false, undefinedSubst)
}
}
def visitType(visitor: ScalaTypeVisitor): Unit = {
visitor.visitTypePolymorphicType(this)
}
override def typeDepth: Int = {
if (typeParameters.nonEmpty) internalType.typeDepth.max(ScType.typeParamsDepth(typeParameters.toArray) + 1)
else internalType.typeDepth
}
}