Alexander Udalov
953b461c53
From now on, the old JVM backend will report an error by default when compiling against class files produced by the JVM IR backend. This is needed because we're not yet sure that the ABI generated by JVM IR is fully correct and do not want to land in a 2-dimensional compatibility situation where we'll need to consider twice more scenarios when introducing any breaking change in the language. This is generally OK since the JVM IR backend is still going to be experimental in 1.4. However, for purposes of users which _do_ need to compile something with the old backend against JVM IR, we provide two new compiler flags: * -Xallow-jvm-ir-dependencies -- allows to suppress the error when compiling with the old backend against JVM IR. * -Xir-binary-with-stable-api -- allows to mark the generated binaries as stable, when compiling anything with JVM IR, so that dependent modules will compile even with the old backend automatically. In this case, the author usually does not care for the generated ABI, or s/he ensures that it's consistent with the one expected by the old compiler with some external tools. Internally, this is implemented by storing two new flags in kotlin.Metadata: one tells if the class file was compiled with the JVM IR, and another tells if the class file is stable (in case it's compiled with JVM IR). Implementation is similar to the diagnostic reported by the pre-release dependency checker.
The Kotlin Standard Library
This module creates the standard library for Kotlin.
Notes for contributors
We use code generation to generate utility extension functions for some collection-like types like arrays, strings, Collection<T>, Sequence<T>, Map<K, V> etc.
These sources are placed into the generated folder and their names are prefixed with an underscore, for example, generated/_Collections.kt
To run the code generator, use the following command in the root directory of the project:
./gradlew :tools:kotlin-stdlib-gen:run
Note: on Windows type
gradlewwithout the leading./
This then runs the script which generates a significant part of stdlib sources from the templates written in a special Kotlin-based DSL.
Usage samples
If you want to author samples for the standard library, please head to the samples readme.