Class DomainBoundaryAttribute
Marks a method or class as a domain boundary crossing point. When applied to a class, all methods in the class inherit the layer annotation.
[AttributeUsage(AttributeTargets.Class|AttributeTargets.Constructor|AttributeTargets.Method, Inherited = false)]
public sealed class DomainBoundaryAttribute : Attribute- Inheritance
-
DomainBoundaryAttribute
- Inherited Members
- Extension Methods
Examples
// Class-level annotation — all methods in UserService are tagged as "Domain"
[DomainBoundary("Domain")]
static class UserService { ... }
// Method-level annotation — takes precedence over class annotation
[DomainBoundary("Application")]
public void ProcessOrder(Result<Order, ErrorsOf<DomainError>> result) { ... }
// Caller must map first:
ProcessOrder(domainResult.MapError(e => new AppError(e.Message)));Remarks
When a Result<T, TError> with a typed error union is passed to a
[DomainBoundary]-marked method without calling .MapError() first,
the RESL1030 analyzer reports a warning. This enforces that domain-specific typed
error surfaces are translated before crossing architectural layers.
The optional layer parameter is also used by REslava.Result.Flow source
generator to annotate diagram nodes with their architectural layer
(_LayerView, _Stats, _ErrorSurface, _ErrorPropagation).
Priority order: method annotation → class annotation → namespace heuristics.
Constructors
DomainBoundaryAttribute()
Marks this method as a domain boundary.
public DomainBoundaryAttribute()DomainBoundaryAttribute(string)
Marks this method as a domain boundary with a named layer label.
public DomainBoundaryAttribute(string layer)Parameters
layerstringThe architectural layer this method belongs to (e.g. "Application").
Properties
Layer
Optional layer label for diagram annotation (e.g. "Application", "Infrastructure").
public string? Layer { get; }