sdk/lib/_internal/compiler/js_lib/annotations.dart - Issue 1032783003: dart2js: use Es6 maps when available.

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Unified Diff: sdk/lib/_internal/compiler/js_lib/annotations.dart

Issue 1032783003: dart2js: use Es6 maps when available. (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart

Patch Set: Mark empty-hashmap creation as having no side-effect. Created 5 years, 8 months ago

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Index: sdk/lib/_internal/compiler/js_lib/annotations.dart

diff --git a/sdk/lib/_internal/compiler/js_lib/annotations.dart b/sdk/lib/_internal/compiler/js_lib/annotations.dart

index c20098038129e57606faffa81d34859a523a1fba..0ade22151b95fae28989cdce2c87d986d9a23743 100644

--- a/sdk/lib/_internal/compiler/js_lib/annotations.dart

+++ b/sdk/lib/_internal/compiler/js_lib/annotations.dart

@@ -5,7 +5,9 @@

part of _js_helper;

/// Tells the optimizing compiler that the annotated method has no

-/// side-effects.

+/// side-effects. Allocations don't count as side-effects, since they can be

+/// dropped without changing the semantics of the program.

+///

/// Requires @NoInline() to function correctly.

class NoSideEffects {

const NoSideEffects();