org.jetbrains.kotlin.fir.resolve.transformers.ReturnTypeCalculatorForFullBodyResolve.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
* 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.fir.resolve.transformers
import org.jetbrains.kotlin.fir.declarations.FirCallableDeclaration
import org.jetbrains.kotlin.fir.diagnostics.ConeSimpleDiagnostic
import org.jetbrains.kotlin.fir.diagnostics.DiagnosticKind
import org.jetbrains.kotlin.fir.render
import org.jetbrains.kotlin.fir.scopes.FakeOverrideTypeCalculator
import org.jetbrains.kotlin.fir.types.FirResolvedTypeRef
import org.jetbrains.kotlin.fir.types.builder.buildErrorTypeRef
object ReturnTypeCalculatorForFullBodyResolve : ReturnTypeCalculator() {
override val fakeOverrideTypeCalculator: FakeOverrideTypeCalculator
get() = FakeOverrideTypeCalculator.Forced
override fun tryCalculateReturnTypeOrNull(declaration: FirCallableDeclaration): FirResolvedTypeRef? {
val returnTypeRef = declaration.returnTypeRef
if (returnTypeRef is FirResolvedTypeRef) return returnTypeRef
if (declaration.origin.fromSupertypes) {
return FakeOverrideTypeCalculator.Forced.computeReturnType(declaration)
}
return buildErrorTypeRef {
diagnostic = ConeSimpleDiagnostic(
"Cannot calculate return type during full-body resolution (local class/object?): ${declaration.render()}",
DiagnosticKind.InferenceError
)
}
}
}