Type translation, initial import

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/Psi2IrTranslator.kt

@@ -21,7 +21,6 @@ import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.util.patchDeclarationParents
 import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.psi2ir.transformations.AnnotationGenerator
 import org.jetbrains.kotlin.psi2ir.generators.GeneratorContext
 import org.jetbrains.kotlin.psi2ir.generators.ModuleGenerator
 import org.jetbrains.kotlin.psi2ir.transformations.generateAnnotationsForDeclarations

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/generators/ConstantValueGenerator.kt

@@ -6,28 +6,36 @@
 package org.jetbrains.kotlin.psi2ir.generators
 
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
+import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.impl.IrConstImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrGetEnumValueImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrVarargImpl
+import org.jetbrains.kotlin.ir.util.SymbolTable
 import org.jetbrains.kotlin.psi2ir.transformations.AnnotationGenerator
 import org.jetbrains.kotlin.resolve.constants.*
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.typeUtil.builtIns
 
 class ConstantValueGenerator(
-    private val context: GeneratorContext,
-    private val annotationGenerator: AnnotationGenerator? = null
+    private val moduleDescriptor: ModuleDescriptor,
+    private val symbolTable: SymbolTable,
+    private val annotationGenerator: AnnotationGenerator?
 ) {
 
+    constructor(
+        context: GeneratorContext,
+        annotationGenerator: AnnotationGenerator? = null
+    ) : this(context.moduleDescriptor, context.symbolTable, annotationGenerator)
+
     fun generateConstantValueAsExpression(
         startOffset: Int,
         endOffset: Int,
         constantValue: ConstantValue<*>,
         varargElementType: KotlinType? = null
     ): IrExpression {
-        val constantType = constantValue.getType(context.moduleDescriptor)
+        val constantType = constantValue.getType(moduleDescriptor)
 
         return when (constantValue) {
             is StringValue -> IrConstImpl.string(startOffset, endOffset, constantType, constantValue.value)
@@ -63,7 +71,7 @@ class ConstantValueGenerator(
                 IrGetEnumValueImpl(
                     startOffset, endOffset,
                     constantType,
-                    context.symbolTable.referenceEnumEntry(enumEntryDescriptor)
+                    symbolTable.referenceEnumEntry(enumEntryDescriptor)
                 )
             }
 

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/transformations/AnnotationGenerator.kt

@@ -6,6 +6,7 @@
 package org.jetbrains.kotlin.psi2ir.transformations
 
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
+import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.descriptors.PropertySetterDescriptor
 import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor
 import org.jetbrains.kotlin.descriptors.annotations.AnnotationUseSiteTarget
@@ -15,6 +16,7 @@ import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.IrCall
 import org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl
+import org.jetbrains.kotlin.ir.util.SymbolTable
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid
 import org.jetbrains.kotlin.ir.visitors.acceptChildrenVoid
 import org.jetbrains.kotlin.ir.visitors.acceptVoid
@@ -26,12 +28,18 @@ import org.jetbrains.kotlin.resolve.source.PsiSourceElement
 import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 
 fun generateAnnotationsForDeclarations(context: GeneratorContext, irElement: IrElement) {
-    irElement.acceptVoid(AnnotationGenerator(context))
+    val annotationGenerator = AnnotationGenerator(context.moduleDescriptor, context.symbolTable)
+    irElement.acceptVoid(annotationGenerator)
 }
 
-class AnnotationGenerator(private val context: GeneratorContext) : IrElementVisitorVoid {
+class AnnotationGenerator(
+    moduleDescriptor: ModuleDescriptor,
+    private val symbolTable: SymbolTable
+) : IrElementVisitorVoid {
 
-    private val constantValueGenerator = ConstantValueGenerator(context, this)
+    constructor(context: GeneratorContext) : this(context.moduleDescriptor, context.symbolTable)
+
+    private val constantValueGenerator = ConstantValueGenerator(moduleDescriptor, symbolTable, this)
 
     override fun visitElement(element: IrElement) {
         element.acceptChildrenVoid(this)
@@ -82,7 +90,7 @@ class AnnotationGenerator(private val context: GeneratorContext) : IrElementVisi
         val primaryConstructorDescriptor =
             annotationClassDescriptor.safeAs<ClassDescriptor>()?.unsubstitutedPrimaryConstructor
                     ?: throw AssertionError("No primary constructor for annotation class $annotationClassDescriptor")
-        val primaryConstructorSymbol = context.symbolTable.referenceConstructor(primaryConstructorDescriptor)
+        val primaryConstructorSymbol = symbolTable.referenceConstructor(primaryConstructorDescriptor)
 
         val psi = annotationDescriptor.source.safeAs<PsiSourceElement>()?.psi
         val startOffset = psi?.startOffset ?: UNDEFINED_OFFSET

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/transformations/InsertImplicitCasts.kt

@@ -34,42 +34,27 @@ import org.jetbrains.kotlin.types.isError
 import org.jetbrains.kotlin.types.isNullabilityFlexible
 import org.jetbrains.kotlin.types.typeUtil.makeNotNullable
 import org.jetbrains.kotlin.types.upperIfFlexible
-import java.util.*
 
 fun insertImplicitCasts(builtIns: KotlinBuiltIns, element: IrElement, symbolTable: SymbolTable) {
     element.transformChildren(InsertImplicitCasts(builtIns, symbolTable), null)
 }
 
 class InsertImplicitCasts(private val builtIns: KotlinBuiltIns, private val symbolTable: SymbolTable) : IrElementTransformerVoid() {
-    private val typeParameterScopes = ArrayDeque<Map<TypeParameterDescriptor, IrTypeParameterSymbol>>()
+
+    private val typeParameterResolver = ScopedTypeParametersResolver()
 
     private inline fun <T> runInTypeParameterScope(typeParametersContainer: IrTypeParametersContainer, fn: () -> T): T {
-        enterTypeParameterScope(typeParametersContainer)
+        typeParameterResolver.enterTypeParameterScope(typeParametersContainer)
         val result = fn()
-        leaveTypeParameterScope()
+        typeParameterResolver.leaveTypeParameterScope()
         return result
     }
 
-    private fun enterTypeParameterScope(typeParametersContainer: IrTypeParametersContainer) {
-        typeParameterScopes.addFirst(
-            typeParametersContainer.typeParameters.associate {
-                it.descriptor to it.symbol
-            }
-        )
-    }
-
-    private fun leaveTypeParameterScope() {
-        typeParameterScopes.removeFirst()
-    }
-
-    private fun resolveScopedTypeParameter(classifier: ClassifierDescriptor): IrTypeParameterSymbol? {
-        if (classifier !is TypeParameterDescriptor) return null
-        for (scope in typeParameterScopes) {
-            val local = scope[classifier]
-            if (local != null) return local
-        }
-        return null
-    }
+    private fun resolveScopedTypeParameter(classifier: ClassifierDescriptor): IrTypeParameterSymbol? =
+        if (classifier is TypeParameterDescriptor)
+            typeParameterResolver.resolveScopedTypeParameter(classifier)
+        else
+            null
 
     override fun visitCallableReference(expression: IrCallableReference): IrExpression =
         expression.transformPostfix {

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/transformations/ScopedTypeParametersResolver.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.psi2ir.transformations
+
+import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor
+import org.jetbrains.kotlin.ir.declarations.IrTypeParametersContainer
+import org.jetbrains.kotlin.ir.symbols.IrTypeParameterSymbol
+import java.util.*
+
+class ScopedTypeParametersResolver {
+
+    private val typeParameterScopes = ArrayDeque<Map<TypeParameterDescriptor, IrTypeParameterSymbol>>()
+
+    fun enterTypeParameterScope(typeParametersContainer: IrTypeParametersContainer) {
+        typeParameterScopes.addFirst(
+            typeParametersContainer.typeParameters.associate {
+                it.descriptor to it.symbol
+            }
+        )
+    }
+
+    fun leaveTypeParameterScope() {
+        typeParameterScopes.removeFirst()
+    }
+
+    fun resolveScopedTypeParameter(typeParameterDescriptor: TypeParameterDescriptor): IrTypeParameterSymbol? {
+        for (scope in typeParameterScopes) {
+            val local = scope[typeParameterDescriptor]
+            if (local != null) return local
+        }
+        return null
+    }
+}

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/types/TypeTranslator.kt

@@ -0,0 +1,128 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.psi2ir.types
+
+import org.jetbrains.kotlin.descriptors.ClassDescriptor
+import org.jetbrains.kotlin.descriptors.ModuleDescriptor
+import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor
+import org.jetbrains.kotlin.descriptors.annotations.Annotations
+import org.jetbrains.kotlin.ir.IrElement
+import org.jetbrains.kotlin.ir.declarations.IrDeclaration
+import org.jetbrains.kotlin.ir.declarations.IrTypeParametersContainer
+import org.jetbrains.kotlin.ir.expressions.IrCall
+import org.jetbrains.kotlin.ir.expressions.IrExpression
+import org.jetbrains.kotlin.ir.types.impl.IrTypeImpl
+import org.jetbrains.kotlin.ir.util.SymbolTable
+import org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid
+import org.jetbrains.kotlin.ir.visitors.acceptChildrenVoid
+import org.jetbrains.kotlin.ir.visitors.acceptVoid
+import org.jetbrains.kotlin.psi2ir.generators.GeneratorContext
+import org.jetbrains.kotlin.psi2ir.transformations.AnnotationGenerator
+import org.jetbrains.kotlin.psi2ir.transformations.ScopedTypeParametersResolver
+import org.jetbrains.kotlin.types.*
+
+class TypeTranslator(
+    moduleDescriptor: ModuleDescriptor,
+    private val symbolTable: SymbolTable
+) {
+
+    constructor(context: GeneratorContext) : this(context.moduleDescriptor, context.symbolTable)
+
+    private val annotationGenerator = AnnotationGenerator(moduleDescriptor, symbolTable)
+    private val typeParametersResolver = ScopedTypeParametersResolver()
+
+    fun enterScope(irElement: IrTypeParametersContainer) {
+        typeParametersResolver.enterTypeParameterScope(irElement)
+    }
+
+    fun leaveScope() {
+        typeParametersResolver.leaveTypeParameterScope()
+    }
+
+    private fun resolveTypeParameter(typeParameterDescriptor: TypeParameterDescriptor) =
+        typeParametersResolver.resolveScopedTypeParameter(typeParameterDescriptor)
+                ?: symbolTable.referenceTypeParameter(typeParameterDescriptor)
+
+    fun translateType(ktType: KotlinType): IrTypeImpl =
+        translateType(ktType, Variance.INVARIANT)
+
+    private fun translateType(ktType: KotlinType, variance: Variance): IrTypeImpl {
+        if (ktType.isFlexible()) {
+            return translateType(ktType.upperIfFlexible(), variance)
+        }
+
+        val ktTypeConstructor = ktType.constructor
+        val ktTypeDescriptor = ktTypeConstructor.declarationDescriptor
+
+        return when (ktTypeDescriptor) {
+            is TypeParameterDescriptor ->
+                IrTypeImpl(
+                    resolveTypeParameter(ktTypeDescriptor),
+                    ktType.isMarkedNullable,
+                    emptyList(),
+                    translateTypeAnnotations(ktType.annotations),
+                    variance
+                )
+
+            is ClassDescriptor ->
+                IrTypeImpl(
+                    symbolTable.referenceClass(ktTypeDescriptor),
+                    ktType.isMarkedNullable,
+                    translateTypeArguments(ktType.arguments),
+                    translateTypeAnnotations(ktType.annotations),
+                    variance
+                )
+
+            else ->
+                TODO()
+        }
+    }
+
+    private fun translateTypeAnnotations(annotations: Annotations): List<IrCall> =
+        annotations.getAllAnnotations().map {
+            // TODO filter out annotation targets
+            annotationGenerator.generateAnnotationConstructorCall(it.annotation)
+        }
+
+    private fun translateTypeArguments(arguments: List<TypeProjection>) =
+        arguments.map {
+            // TODO starProjection
+            translateType(it.type, it.projectionKind)
+        }
+
+    private inner class SimpleTranslationVisitor : IrElementVisitorVoid {
+        override fun visitElement(element: IrElement) {
+            element.acceptChildrenVoid(this)
+        }
+
+        override fun visitDeclaration(declaration: IrDeclaration) {
+            if (declaration is IrTypeParametersContainer) {
+                enterScope(declaration)
+            }
+            declaration.acceptChildrenVoid(this)
+            if (declaration is IrTypeParametersContainer) {
+                leaveScope()
+            }
+        }
+
+        override fun visitExpression(expression: IrExpression) {
+            translateType(expression.type)
+            expression.acceptChildrenVoid(this)
+        }
+    }
+
+    companion object {
+
+        fun tryTranslateAllExpressionTypes(
+            element: IrElement,
+            context: GeneratorContext
+        ) {
+            element.acceptVoid(TypeTranslator(context).SimpleTranslationVisitor())
+        }
+
+    }
+}
+

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/types/impl/IrTypeImpl.kt

@@ -26,17 +26,16 @@ class IrTypeImpl(
         annotations: List<IrCall>
     ) : this(classifier, hasQuestionMark, arguments, annotations, Variance.INVARIANT)
 
+    constructor(
+        other: IrType,
+        variance: Variance
+    ) : this(other.classifier, other.hasQuestionMark, other.arguments, other.annotations, variance)
+
     override val type: IrType get() = this
 }
 
 fun makeTypeProjection(type: IrType, variance: Variance): IrTypeProjection =
-    if (type !is IrTypeImpl || type.variance != variance)
-        IrTypeImpl(
-            type.classifier,
-            type.hasQuestionMark,
-            type.arguments,
-            type.annotations,
-            variance
-        )
+    if (type is IrTypeImpl && type.variance == variance)
+        type
     else
-        type
+        IrTypeImpl(type, variance)