tree b45a13f970191fdd9773426f7f8b9c5a5a132c00
parent e4b19f1517090f1e80e6f9256de558942cda128a
author Johnni Winther <johnniwinther@google.com> 1641912758 +0000
committer Johnni Winther <johnniwinther@google.com> 1641912758 +0000

[cfe] Change encoding of supported dart: libraries

This CL changes the way dart: libraries are considered supported when
used in conditional imports or bool.fromEnvironment constant using
the "dart.library.*" values.

Library nodes now has an isUnsupported flag which is set according to
the "supported" property in the libraries specification. Furthermore
the Target now supplies a DartLibrarySupport interface that allows
targets to override whether dart: libraries are unsupported.

This allows the JIT/AOT to use the same platform file but still
consider dart:mirrors unsupported in AOT mode, and dart2js to consider
the internal library `dart:_dart2js_runtime_metrics` supported.

Furthermore, the internal handling is changed so that condition imports
and bool.fromEnvironments constants are computed through the same logic
for "dart.library.*" values, avoiding the need for passing these values
through the environment.

TEST=pkg/front_end/testcases/general/supported_libraries/main

Closes https://github.com/dart-lang/sdk/issues/48057
Closes https://github.com/dart-lang/sdk/issues/47814
Closes https://github.com/dart-lang/sdk/issues/47243
Closes https://github.com/dart-lang/sdk/issues/32657
Closes https://github.com/dart-lang/sdk/issues/36460

Change-Id: Ie8f8dff99167de64ced51b71d89918bf0f3bbd13
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/227020
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Chloe Stefantsova <cstefantsova@google.com>