Do not render empty event stream errors (#2200)

Signed-off-by: Daniele Ahmed <[email protected]>
smithy-lang · Jan 18, 2023 · a0b2ac6 · a0b2ac6
1 parent b08c061
commit a0b2ac6
Showing 1 changed file with 9 additions and 7 deletions.
diff --git a/...src/main/kotlin/software/amazon/smithy/rust/codegen/server/smithy/ServerCodegenVisitor.kt b/...src/main/kotlin/software/amazon/smithy/rust/codegen/server/smithy/ServerCodegenVisitor.kt
@@ -487,13 +487,15 @@ open class ServerCodegenVisitor(
         }
 
         if (shape.isEventStream()) {
-            rustCrate.withModule(RustModule.Error) {
-                val symbol = codegenContext.symbolProvider.toSymbol(shape)
-                val errors = shape.eventStreamErrors()
-                    .map { model.expectShape(it.asMemberShape().get().target, StructureShape::class.java) }
-                val errorSymbol = shape.eventStreamErrorSymbol(codegenContext.symbolProvider)
-                ServerOperationErrorGenerator(model, codegenContext.symbolProvider, symbol, errors)
-                    .renderErrors(this, errorSymbol, symbol)
+            val errors = shape.eventStreamErrors()
+                .map { model.expectShape(it.asMemberShape().get().target, StructureShape::class.java) }
+            if (errors.isNotEmpty()) {
+                rustCrate.withModule(RustModule.Error) {
+                    val symbol = codegenContext.symbolProvider.toSymbol(shape)
+                    val errorSymbol = shape.eventStreamErrorSymbol(codegenContext.symbolProvider)
+                    ServerOperationErrorGenerator(model, codegenContext.symbolProvider, symbol, errors)
+                        .renderErrors(this, errorSymbol, symbol)
+                }
             }
         }
     }