Replace loading the whole world IR with loading only exported (reachable) IR.
For that purpose the direct and inverse dependency graph is used.
It is stored in a cache directory and the cache updater keeps it up to date.
If after loading it is found that other files must be also implicitly rebuilt
(see rebuilt reasons below), IR for that files also will be loaded.
This algorithm repeats until the number of implicitly rebuilt files is not 0.
More rebuilt reasons (dirty state) have been added:
- added file: this is a new file;
- modified ir: ir of the file has been updated;
- updated exports: exports from the file have been added or removed
(e.g. a function has been used from another file);
- updated inline imports: imported inline function has been modified
(transitively);
- removed inverse depends: a dependent file has been removed;
- removed direct depends: a dependency file has been removed;
- removed file: this file has been removed.
Incremental cache tests has been refactored:
- The supporting of all rebuilt reasons (dirty states) has been added;
- New file name format "*.$suffix.kt" for the test steps has been allowed,
so the syntax highlight works now;
- Explicit stdlib dependency usage has been removed.
Previously we always generated factories for contextful lambdas:
```kt
fun foo(a: Int) = { a }
```
```js
function foo(a_38) {
return foo$lambda(a_38);
}
// factory!
function foo$lambda($a) {
return function () {
return $a;
};
}
```
After this patch, the generated code for `foo` is more concise:
```js
function foo(a) {
return function() { return a; };
}
```
This is godugly code, where a flag for file level signatures is passsed
around.
An alternative would be not to create file level signatures for toplevel
private clases, since those still need unique names, at least on JVM.
But that would break binary compatibility.
Signatures are due for overhaul anyway. Hopefully this code can be
reverted at that point.
Char's equals method in js doesn't work properly because now equals
method is not fake override in Char, but it is actual override and so
when we call equals for some char in js, it will not be boxed. To fix
it we need to get correct receiver's type.
Artem Kobzar