commit 0ab7c7ec514a2c83424618abe4c75e9168d77fdd
author Stephen Adams <sra@google.com> Wed Dec 30 19:52:10 2020 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> Wed Dec 30 19:52:10 2020 +0000
tree b98a3e39693f1ce50e39f83cecc6b2a9f041dfdc
parent 969ff148d038b64efc7e1edb7c80e6719e29dafc

[dart2js] InterfaceType tweak

Avoid duplicate empty lists.

Change-Id: Ibad5f4263a5cef8f7086473d9eebc13612323ebb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/177040
Reviewed-by: Stephen Adams <sra@google.com>
Commit-Queue: Stephen Adams <sra@google.com>

pkg/compiler/lib/src/elements/types.dart

diff --git a/pkg/compiler/lib/src/elements/types.dart b/pkg/compiler/lib/src/elements/types.dart
index 8a660e2..bfd7666 100644
--- a/pkg/compiler/lib/src/elements/types.dart
+++ b/pkg/compiler/lib/src/elements/types.dart
@@ -313,8 +313,13 @@
   final ClassEntity element;
   final List<DartType> typeArguments;
 
-  InterfaceType._(this.element, this.typeArguments)
-      : assert(typeArguments.every((e) => e != null));
+  InterfaceType._allocate(this.element, this.typeArguments);
+
+  factory InterfaceType._(ClassEntity element, List<DartType> typeArguments) {
+    assert(typeArguments.every((e) => e != null));
+    if (typeArguments.isEmpty) typeArguments = const [];
+    return InterfaceType._allocate(element, typeArguments);
+  }
 
   factory InterfaceType._readFromDataSource(
       DataSource source, List<FunctionTypeVariable> functionTypeVariables) {