diff options
Diffstat (limited to 'spec')
| -rw-r--r-- | spec/08-pattern-matching.md | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/spec/08-pattern-matching.md b/spec/08-pattern-matching.md index d496388a91..7e48947639 100644 --- a/spec/08-pattern-matching.md +++ b/spec/08-pattern-matching.md @@ -328,10 +328,12 @@ A type pattern $T$ is of one of the following forms: * A reference to a class $C$, $p.C$, or `$T$#$C$`. This type pattern matches any non-null instance of the given class. - Note that the prefix of the class, if it is given, is relevant for determining + Note that the prefix of the class, if it exists, is relevant for determining class instances. For instance, the pattern $p.C$ matches only instances of classes $C$ which were created with the path $p$ as - prefix. + prefix. This also applies to prefixes which are not given syntactically. + For example, if $C$ refers to a class defined in the nearest enclosing + class and is thus equivalent to $this.C$, it is considered to have a prefix. The bottom types `scala.Nothing` and `scala.Null` cannot be used as type patterns, because they would match nothing in any case. |