solve/it.unibo.tuprolog.solve.exception.error/ExistenceError

ExistenceError

class ExistenceError(message: String? = null, cause: Throwable? = null, contexts: Array<ExecutionContext>, val expectedObject: ExistenceError.ObjectType, val culprit: Term, extraData: Term? = null) : LogicError

The existence error occurs when an object on which an operation is to be performed does not exist

Parameters

message

the detail message string.

cause

the cause of this exception.

contexts

a stack of contexts localising the exception

expectedObject

The type of the missing object

culprit

The object whose lack caused the error

extraData

The possible extra data to be carried with the error

Constructors

ExistenceError

constructor(message: String? = null, cause: Throwable? = null, contexts: Array<ExecutionContext>, expectedObject: ExistenceError.ObjectType, culprit: Term, extraData: Term? = null)

constructor(message: String? = null, cause: Throwable? = null, context: ExecutionContext, expectedObject: ExistenceError.ObjectType, actualValue: Term, extraData: Term? = null)

Types

Companion

object Companion

ObjectType

enum ObjectType : TermConvertible, Enum<ExistenceError.ObjectType>

A class describing the expected type whose absence caused the error

Properties

cause

expect open val cause: Throwable?

context

val context: ExecutionContext

contexts

val contexts: Array<ExecutionContext>

culprit

val culprit: Term

errorStruct

val errorStruct: Struct

The error Struct as described in Prolog standard: error(error_type, error_extra)

expectedObject

val expectedObject: ExistenceError.ObjectType

extraData

open val extraData: Term?

logicStackTrace

val logicStackTrace: List<Struct>

The exception stacktrace; shorthand for context.prologStackTrace

message

expect open val message: String?

type

open override val type: Struct

Functions

pushContext

open override fun pushContext(newContext: ExecutionContext): ExistenceError

toString

open override fun toString(): String

updateContext

open override fun updateContext(newContext: ExecutionContext, index: Int = 0): ExistenceError

Creates a new exception instance with the context with in position index updated to newContext. Subclasses should override this method and return the correct instance.

updateLastContext

open override fun updateLastContext(newContext: ExecutionContext): ExistenceError