And String.length as well.
This is done for JVM interoperability: java.lang.CharSequence is an open class
and has a function 'length()' which should be implemented in subclasses
somehow.
A minor unexpected effect of this is that String.length() is now a compile-time
constant (it wasn't such as a property because properties are not supported in
compile-time constant evaluation)
#KT-3571 Fixed
Add source roots for IDE features to work in sources, but exclude from Make:
these modules are compiled by the new compiler from build.xml and some weird
errors may arise if we compile it with the old compiler (and also output of
that compilation won't be used anyway)
Alexander Udalov