blob: e492eee60a8d7145444ba3235c0a8c3f5a87e9d6 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
package dotty.tools
package dotc
package core
import Types._
import Flags._
import Contexts._
import util.SimpleMap
import reporting._
class TyperState(val reporter: Reporter = ThrowingReporter) extends DotClass {
/** The current constraint set */
def constraint: Constraint = new Constraint(SimpleMap.Empty)
/** The currently uninstantiated TypeVars */
def undetVars: List[TypeVar] = Nil
def constraint_=(c: Constraint): Unit = {}
def undetVars_=(vs: List[TypeVar]): Unit = unsupported("undetVars_=")
def fresh: TyperState = this
def commit()(implicit ctx: Context): Unit = unsupported("commit")
}
class MutableTyperState(previous: TyperState, reporter: Reporter)
extends TyperState(reporter) {
private var myConstraint: Constraint = previous.constraint
private var myUndetVars: List[TypeVar] = previous.undetVars
override def constraint = myConstraint
override def undetVars = myUndetVars
override def constraint_=(c: Constraint) = myConstraint = c
override def undetVars_=(vs: List[TypeVar]) = myUndetVars = vs
override def fresh: TyperState = new MutableTyperState(this, new StoreReporter)
override def commit()(implicit ctx: Context) = {
ctx.typerState.constraint = constraint
ctx.typerState.undetVars = undetVars
reporter.flush()
}
}
|
