AppError class abstract

Abstract base class for all application errors.

Provides a common interface for typed, structured error handling. All errors carry a slug (machine-readable identifier), a msg (human-readable message), and an optional stackTrace.

Preset concrete subclasses cover the most common error domains:

• HttpError — HTTP request failures (network, status codes, etc.)
• CacheError — Local cache read/write failures
• DeviceInfoError — Device information retrieval failures
• FormError — Form validation and submission failures
• StorageError — Device storage access failures

General-purpose subclasses are also provided:

• AppUnknownError — Unexpected or unclassified errors
• ParseError — Data parsing or deserialization failures
• EntityNotFitError — Domain rule or constraint violations
• FailedToShareError — Content-sharing failures
• TokenNotFoundError — Authentication token not found

See also ValueError for value-validation errors, and the corresponding ParseException / CacheException for thrown exception counterparts.

Implementers

• AppUnknownError
• CacheError
• DeviceInfoError
• EntityNotFitError
• FailedToShareError
• FormError
• HttpError
• ParseError
• StorageError
• TokenNotFoundError
• ValueError

Constructors

AppError({String slug = '', String msg = '', String stackTrace = '', Object? payload})

const

Properties

hashCode → int

The hash code for this object.

no setter, override

msg → String

A human-readable description of this error.

final

payload → Object?

An optional payload containing additional data associated with this error.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

slug → String

A machine-readable identifier for this error (e.g. 'user_not_found').

final

stackTrace → String

The stack trace associated with this error, if available.

final

Methods

maybeResponse<T>() → Maybe<T>

If this error is an HttpError<T>, returns Just with its typed response body; otherwise returns Nothing.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override