UndefinedMemberD4rtException class

Thrown when a member lookup finds no member of that name on the receiver.

This is a control-flow signal, and that is the reason it exists. Eight sites in each mirrored visitor have to distinguish "the member is genuinely absent, so try extension-method resolution" from "the member was found and something inside it failed, so propagate that". Before SCC28 they made that decision with e.message.contains("Undefined property '$name'") — a formatted, human-readable diagnostic used as a branch condition. The wording was therefore load-bearing: rewording it, in either tree, silently disabled extension methods for every receiver kind routed through the edited site, with no analyzer error and a wrong answer rather than a crash as the symptom.

memberName carries what the message used to spell, so the message is free to change. It is compared exactly (e.memberName == name) where the old code asked for a substring, which also removes the case where a member whose name merely appeared in an unrelated diagnostic took the extension branch.

A subtype of RuntimeD4rtException, deliberately. Between a raise site and the site that inspects it sit roughly forty on RuntimeD4rtException clauses, most of which only re-wrap and re-throw. Making this a sibling type would have required changing all of them in one commit; making it a subtype let the conversion land raise site by raise site, with every intermediate state working. toString() is inherited too, so the diagnostics are unchanged to the byte and no message assertion needed rewriting.

Not to be confused with D4rtNoSuchMethodError, which the final lookup failures raise — the ones reached after extension resolution and any user noSuchMethod have had their chance. This type marks the intermediate failures, the ones that are still a question rather than an answer.

Inheritance

Constructors

UndefinedMemberD4rtException(String message, {required String memberName})

Properties

hasDirectiveContext ↔ bool
Whether message already names which module failed to load which target.
getter/setter pairinherited
hashCode → int
The hash code for this object.
no setterinherited
memberName → String
The member that was not found. Compared by equality, never parsed.
final
message → String
The error message.
finalinherited
originalException → Object?
When this runtime error wraps a native exception thrown from a bridged adapter (method, static method, getter, setter, operator, constructor), the original exception object is preserved here. This lets a typed on NativeType / bare catch clause in interpreted code dispatch against the real exception type rather than this RuntimeError wrapper. (OPEN B.5 — U13/U24.)
finalinherited
originalStackTrace → StackTrace?
The stack trace that accompanied originalException at the point the bridged adapter threw it.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
trackedStackTrace ↔ StackTrace?
Stack trace captured by ErrorReporter when tracking is enabled.
getter/setter pairinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
revoke() → bool
Revokes this error from the ErrorReporter.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited