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authorFelix Mulder <felix.mulder@gmail.com>2017-02-02 15:46:39 +0100
committerGitHub <noreply@github.com>2017-02-02 15:46:39 +0100
commit3e65cff0caf4c671d3cf98da347792c85a4ac2de (patch)
tree415cfd9ac0601ceef6856e8873dcb384bb00abc3 /compiler/src/dotty/tools/dotc/transform
parentfc031140ec00f2bfdc79456e1de9e15ae7df8d9a (diff)
parent6a2d1e0eb1005aa2e3567f256c6e259ede2f6ea7 (diff)
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Merge pull request #1874 from dotty-staging/topic/dottydoc-markdown
[doctool] Add markdown support && Static site generation
Diffstat (limited to 'compiler/src/dotty/tools/dotc/transform')
-rw-r--r--compiler/src/dotty/tools/dotc/transform/IsInstanceOfEvaluator.scala27
1 files changed, 14 insertions, 13 deletions
diff --git a/compiler/src/dotty/tools/dotc/transform/IsInstanceOfEvaluator.scala b/compiler/src/dotty/tools/dotc/transform/IsInstanceOfEvaluator.scala
index 8bc4a2aa9..ebd2ae436 100644
--- a/compiler/src/dotty/tools/dotc/transform/IsInstanceOfEvaluator.scala
+++ b/compiler/src/dotty/tools/dotc/transform/IsInstanceOfEvaluator.scala
@@ -7,36 +7,37 @@ import core._
import Contexts.Context, Types._, Constants._, Decorators._, Symbols._
import TypeUtils._, TypeErasure._, Flags._
-
/** Implements partial evaluation of `sc.isInstanceOf[Sel]` according to:
*
- * +-------------+----------------------------+----------------------------+------------------+
* | Sel\sc | trait | class | final class |
- * +-------------+----------------------------+----------------------------+------------------+
+ * | ----------: | :------------------------: | :------------------------: | :--------------: |
* | trait | ? | ? | statically known |
* | class | ? | false if classes unrelated | statically known |
* | final class | false if classes unrelated | false if classes unrelated | statically known |
- * +-------------+----------------------------+----------------------------+------------------+
*
* This is a generalized solution to raising an error on unreachable match
* cases and warnings on other statically known results of `isInstanceOf`.
*
* Steps taken:
*
- * 1. evalTypeApply will establish the matrix and choose the appropriate
- * handling for the case:
- * 2. a) Sel/sc is a value class or scrutinee is `Any`
- * b) handleStaticallyKnown
- * c) falseIfUnrelated with `scrutinee <:< selector`
- * d) handleFalseUnrelated
- * e) leave as is (aka `happens`)
- * 3. Rewrite according to step taken in `2`
+ * 1. `evalTypeApply` will establish the matrix and choose the appropriate
+ * handling for the case:
+ * - Sel/sc is a value class or scrutinee is `Any`
+ * - `handleStaticallyKnown`
+ * - `falseIfUnrelated` with `scrutinee <:< selector`
+ * - `handleFalseUnrelated`
+ * - leave as is (`happens`)
+ * 2. Rewrite according to steps taken in 1
*/
class IsInstanceOfEvaluator extends MiniPhaseTransform { thisTransformer =>
import dotty.tools.dotc.ast.tpd._
- def phaseName = "isInstanceOfEvaluator"
+ val phaseName = "isInstanceOfEvaluator"
+
+ /** Transforms a [TypeApply](dotty.tools.dotc.ast.Trees.TypeApply) in order to
+ * evaluate an `isInstanceOf` check according to the rules defined above.
+ */
override def transformTypeApply(tree: TypeApply)(implicit ctx: Context, info: TransformerInfo): Tree = {
val defn = ctx.definitions