The check for whether a function needs a default stub should run fewer
times now, and in particular is no longer quadratic. Also, this fixes
a weirdness in that certain inheritance hierarchies would produce
a default stub that points to a non-stub through its overriddenSymbols
field.
Otherwise a local class in a field initializer or anonymous init block
is copied into each constructor of the containing class (because
InitializersLowering calls deepCopy).
Since the code structure no longer resembles the original source code
here, record a custom EnclosingMethod mapping before moving such
classes, and use it in codegen.
Resolves the interaction of @JvmOverloads annotations and
parameterless main methods.
In the following code, both mechanisms generate methods that
ultimately produce the signature `public static void main(String[] args)`
of which there can be only one (true in general of any signature).
```
fun main() { }
@JvmOverloads
fun main(Array<String> args, x: Int = 42) { }
```
This PR simply shuffles the lowerings around, letting parameterless
main methods detect the presence of the default overload produced by
the annotation.
Additionally, this PR improves the testing of parameterless main
methods by actual bytecode patterns, and not simple check for
successful compilation (as @sfs and I discovered, there are issues in
flagging an error on duplicate signatures on the IR backend).
Support this for single file facades as well as for multi-file classes,
similar to code in
MultifileClassCodegen.writeKotlinMultifileFacadeAnnotationIfNeeded.
Extend the test on this attribute to also cover multi-file classes.
so that the enclosing method of objects defined inside lambdas is the
one they are declared in.
Note that this does not fix *all* enclosingInfo tests because JVM_IR
currently follows the KT-28064 proposal, i.e. does not regenerate
objects defined inside lambdas under any circumstances. For example,
this causes test boxInline/enclosingInfo/inlineChain2.kt to fail because
the enclosing method of objects is _2Kt.box instead of (non-existent in
source code) `_2Kt$box$inlined$call$1.invoke` or whatever. What's more
important is that OUTERCLASS no longer points to a non-existent
`box$lambda-N` and therefore `.enclosingMethod` no longer throws.
Necessary to support importing file classes annotated @JvmPackageName,
since the actual package fragment they are a part of has the name from
the `package` declaration.
On the JVM backend the throwUninitializedPropertyAccessException
function is implemented in Java and has a return type of Unit instead of
Nothing. In order to make the types match up we have to wrap its call in
a block with an additional IrThrow.
As for SAM wrappers, the bytecode sequence
new A
dup
new B
dup
invokespecial B.<init>
invokespecial A.<init>
breaks the inliner, so instead we do
new B
dup
invokespecial B.<init>
store x
new A
dup
load x
invokespecial A.<init>
Otherwise, the cached instances cannot be reused for different wrapped
types. Also, if the wrapped type is regenerated during inlining, the
inliner would produce a call to a nonexistent constructor that takes the
regenerated type as an argument.
pyos