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Minor refactor: Extract visitor from ConstantExpressionEvaluator into a separate class

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This commit is contained in:
Pavel V. Talanov
2015-07-16 19:35:51 +03:00
parent 67492ad5dd
commit 5ba2cda95d
1 changed files with 16 additions and 14 deletions
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compiler/frontend/src/org/jetbrains/kotlin/resolve/constants/evaluate/ConstantExpressionEvaluator.kt
+16 -14
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@@ -40,13 +40,11 @@ import org.jetbrains.kotlin.types.expressions.OperatorConventions
import java.math.BigInteger
import kotlin.platform.platformStatic
public class ConstantExpressionEvaluator private constructor(val trace: BindingTrace) : JetVisitor<CompileTimeConstant<*>, JetType>() {
private val factory = ConstantValueFactory(KotlinBuiltIns.getInstance())
public class ConstantExpressionEvaluator private constructor() {
companion object {
platformStatic public fun evaluate(expression: JetExpression, trace: BindingTrace, expectedType: JetType? = TypeUtils.NO_EXPECTED_TYPE): CompileTimeConstant<*>? {
val evaluator = ConstantExpressionEvaluator(trace)
val constant = evaluator.evaluate(expression, expectedType) ?: return null
val visitor = ConstantExpressionEvaluatorVisitor(trace, KotlinBuiltIns.getInstance())
val constant = visitor.evaluate(expression, expectedType) ?: return null
return if (!constant.isError) constant else null
}
@@ -63,13 +61,17 @@ public class ConstantExpressionEvaluator private constructor(val trace: BindingT
return if (!constant.isError) constant else null
}
platformStatic private fun getPossiblyErrorConstant(expression: JetExpression, bindingContext: BindingContext): CompileTimeConstant<*>? {
platformStatic fun getPossiblyErrorConstant(expression: JetExpression, bindingContext: BindingContext): CompileTimeConstant<*>? {
return bindingContext.get(BindingContext.COMPILE_TIME_VALUE, expression)
}
}
}
private fun evaluate(expression: JetExpression, expectedType: JetType?): CompileTimeConstant<*>? {
val recordedCompileTimeConstant = getPossiblyErrorConstant(expression, trace.getBindingContext())
private class ConstantExpressionEvaluatorVisitor(private val trace: BindingTrace, private val builtIns: KotlinBuiltIns) : JetVisitor<CompileTimeConstant<*>?, JetType>() {
private val factory = ConstantValueFactory(builtIns)
fun evaluate(expression: JetExpression, expectedType: JetType?): CompileTimeConstant<*>? {
val recordedCompileTimeConstant = ConstantExpressionEvaluator.getPossiblyErrorConstant(expression, trace.getBindingContext())
if (recordedCompileTimeConstant != null) {
return recordedCompileTimeConstant
}
@@ -99,7 +101,7 @@ public class ConstantExpressionEvaluator private constructor(val trace: BindingT
override fun visitStringTemplateEntryWithExpression(entry: JetStringTemplateEntryWithExpression, data: Nothing?): TypedCompileTimeConstant<String>? {
val expression = entry.getExpression() ?: return null
return this@ConstantExpressionEvaluator.evaluate(expression, KotlinBuiltIns.getInstance().getStringType())?.let {
return evaluate(expression, builtIns.getStringType())?.let {
createStringConstant(it)
}
}
@@ -181,7 +183,7 @@ public class ConstantExpressionEvaluator private constructor(val trace: BindingT
val operationToken = expression.getOperationToken()
if (OperatorConventions.BOOLEAN_OPERATIONS.containsKey(operationToken)) {
val booleanType = KotlinBuiltIns.getInstance().getBooleanType()
val booleanType = builtIns.getBooleanType()
val leftConstant = evaluate(leftExpression, booleanType)
if (leftConstant == null) return null
@@ -268,11 +270,11 @@ public class ConstantExpressionEvaluator private constructor(val trace: BindingT
return null
}
private fun usesVariableAsConstant(expression: JetExpression) = getConstant(expression, trace.getBindingContext())?.usesVariableAsConstant ?: false
private fun usesVariableAsConstant(expression: JetExpression) = ConstantExpressionEvaluator.getConstant(expression, trace.getBindingContext())?.usesVariableAsConstant ?: false
private fun canBeUsedInAnnotation(expression: JetExpression) = getConstant(expression, trace.getBindingContext())?.canBeUsedInAnnotations ?: false
private fun canBeUsedInAnnotation(expression: JetExpression) = ConstantExpressionEvaluator.getConstant(expression, trace.getBindingContext())?.canBeUsedInAnnotations ?: false
private fun isPureConstant(expression: JetExpression) = getConstant(expression, trace.getBindingContext())?.isPure ?: false
private fun isPureConstant(expression: JetExpression) = ConstantExpressionEvaluator.getConstant(expression, trace.getBindingContext())?.isPure ?: false
private fun evaluateUnaryAndCheck(receiver: OperationArgument, name: String, callExpression: JetExpression): Any? {
val functions = unaryOperations[UnaryOperationKey(receiver.ctcType, name)]
@@ -483,7 +485,7 @@ public class ConstantExpressionEvaluator private constructor(val trace: BindingT
}
private fun createOperationArgument(expression: JetExpression, expressionType: JetType, compileTimeType: CompileTimeType<*>): OperationArgument? {
val compileTimeConstant = evaluate(expression, trace, expressionType) ?: return null
val compileTimeConstant = constantExpressionEvaluator.evaluateExpression(expression, trace, expressionType) ?: return null
val evaluationResult = compileTimeConstant.getValue(expressionType) ?: return null
return OperationArgument(evaluationResult, compileTimeType, expression)
}