Pass it in the CompilerConfiguration instead of LanguageVersionSettings.
This is better because LanguageVersionSettings is accessible everywhere
in front-end and back-end, and this flag should not be used there
Previously there were three LanguageFeature instances -- Coroutines,
DoNotWarnOnCoroutines and ErrorOnCoroutines -- which were handled very
awkwardly in the compiler and in the IDE to basically support a language
feature with a more complex state: not just enabled/disabled, but also
enabled with warning and enabled with error. Introduce a new enum
LanguageFeature.State for this and allow LanguageVersionSettings to get
the state of any language feature with 'getFeatureSupport'.
One noticeable drawback of this approach is that looking at the API, one
may assume that any language feature can be in one of the four states
(enabled, warning, error, disabled). This is not true however; there's
only one language feature at the moment (coroutines) for which these
intermediate states (warning, error) are handled in any way. This may be
refactored further by abstracting the logic that checks the language
feature availability so that it would work exactly the same for any
feature.
Another issue is that the difference among ENABLED_WITH_ERROR and
DISABLED is not clear. They are left as separate states because at the
moment, different diagnostics are reported in these two cases and
quick-fixes in IDE rely on that
This makes it possible to avoid the CompilerConfiguration instance in
injectors, because CompilerDeserializationConfiguration was the only
left component that required it.
LanguageVersionSettings is not a good name for this entity anymore, it
should be renamed in the future
Previously JvmTarget was declared in module 'util' which is accessible
for example from 'frontend', which is not very good.
Also add a superinterface named TargetPlatformVersion which is going to
be used in platform-independent injectors in 'frontend' in the following
commits. Use it in one place (LanguageVersionSettingsProviderImpl.kt)
instead of DescriptionAware because TargetPlatformVersion sounds like a
better abstraction than DescriptionAware here
This would allow building the project with Kotlin JPS plugin on TeamCity where older library takes precendence due to appearing earlier in JPS classpath
The problem was that LanguageVersionSettingsImpl.DEFAULT did not have
"WarnOnCoroutines" as a feature and so it was manually added to the settings,
but only in two places: in the compiler and in the IDE
Previously if you had kotlin-reflect 1.0 and kotlin-runtime 1.1 in the
classpath, checkCompatibleWithApiVersion was invoked first, and an error was
reported that suggested to pass "-api-version" to the compiler. However, no
correct "-api-version" can be passed in this case, because
checkMatchingVersions would then report that the two libraries have different
versions anyway. So, now we first ensure that all libraries have the same
version, and only then do check if the version is correct
It should be a valid case to invoke the 1.1 compiler with the 1.0 runtime in
the classpath and "-api-version 1.0". However, previously it was an error and
the message suggested to specify "-language-version 1.0". Language version 1.0
implies API version 1.0, so this effectively made the "-api-version" option
useless
The reason is that these configuration problems may be the reason of
compilation errors, but they were hidden from the output because warnings are
not reported when there's at least one error
Alexey Sedunov