org.jetbrains.kotlin.contracts.parsing.PsiConstantParser.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2017 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.contracts.parsing
import org.jetbrains.kotlin.contracts.description.expressions.BooleanConstantReference
import org.jetbrains.kotlin.contracts.description.expressions.ConstantReference
import org.jetbrains.kotlin.psi.KtConstantExpression
import org.jetbrains.kotlin.psi.KtElement
import org.jetbrains.kotlin.psi.KtVisitor
import org.jetbrains.kotlin.resolve.BindingContext
import org.jetbrains.kotlin.resolve.constants.CompileTimeConstant
import org.jetbrains.kotlin.types.KotlinType
internal class PsiConstantParser(private val callContext: ContractCallContext) : KtVisitor() {
override fun visitKtElement(element: KtElement, data: Unit?): ConstantReference? = null
override fun visitConstantExpression(expression: KtConstantExpression, data: Unit?): ConstantReference? {
val type: KotlinType = callContext.bindingContext.getType(expression) ?: return null
val compileTimeConstant: CompileTimeConstant<*> = callContext.bindingContext.get(BindingContext.COMPILE_TIME_VALUE, expression)
?: return null
val value: Any? = compileTimeConstant.getValue(type)
return when (value) {
true -> BooleanConstantReference.TRUE
false -> BooleanConstantReference.FALSE
null -> ConstantReference.NULL
else -> null
}
}
}