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472c898c87
Dart for-in loops allow `var x = [1]; for (var x in x) {}`, which is not
allowed in JS. If this pattern is detected, a temporary variable is
introduced so the for-in initializer expression is evaluated outside of
the JS for-of loop.
(This issue seems to be unique to for-in loops. For loops and other
kinds of variable declarations of the form `var x = ...` are not
allowed to use `x` in the initializer, even if `x` is declared in an
outer scope.)
Also fixes an out-of-date comment in the DDC+Analyzer backend.
Change-Id: I35b272a5a311f7b6f104cc82a99cc83a6ed5c247
Reviewed-on: https://dart-review.googlesource.com/c/79142
Commit-Queue: Alan Knight <alanknight@google.com>
Auto-Submit: Jenny Messerly <jmesserly@google.com>
Reviewed-by: Alan Knight <alanknight@google.com>
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| analysis_server | ||
| analysis_server_client | ||
| analyzer | ||
| analyzer_cli | ||
| analyzer_fe_comparison | ||
| analyzer_plugin | ||
| async_helper | ||
| build_integration | ||
| compiler | ||
| dart2js_tools | ||
| dart_internal | ||
| dev_compiler | ||
| diagnostic | ||
| expect | ||
| front_end | ||
| js | ||
| js_ast | ||
| kernel | ||
| meta | ||
| microlytics | ||
| smith | ||
| sourcemap_testing | ||
| status_file | ||
| telemetry | ||
| testing | ||
| vm | ||
| .gitignore | ||
| BUILD.gn | ||
| pkg.status | ||