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Diffstat (limited to 'spec/09-top-level-definitions.md')
| -rw-r--r-- | spec/09-top-level-definitions.md | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/spec/09-top-level-definitions.md b/spec/09-top-level-definitions.md index b9c78b23a1..847fab548d 100644 --- a/spec/09-top-level-definitions.md +++ b/spec/09-top-level-definitions.md @@ -23,7 +23,7 @@ A compilation unit consists of a sequence of packagings, import clauses, and class and object definitions, which may be preceded by a package clause. -A compilation unit +A compilation unit ```scala package $p_1$; @@ -34,7 +34,7 @@ $\mathit{stats}$ starting with one or more package clauses is equivalent to a compilation unit consisting of the -packaging +packaging ```scala package $p_1$ { $\ldots$ @@ -94,7 +94,6 @@ into a special empty package. That package cannot be named and therefore cannot be imported. However, members of the empty package are visible to each other without qualification. - ## Package Objects ```ebnf @@ -113,7 +112,6 @@ there is a name conflict, the behavior of the program is currently undefined. It is expected that this restriction will be lifted in a future version of Scala. - ## Package References ```ebnf @@ -121,12 +119,12 @@ QualId ::= id {‘.’ id} ``` A reference to a package takes the form of a qualified identifier. -Like all other references, package references are relative. That is, +Like all other references, package references are relative. That is, a package reference starting in a name $p$ will be looked up in the closest enclosing scope that defines a member named $p$. The special predefined name `_root_` refers to the -outermost root package which contains all top-level packages. +outermost root package which contains all top-level packages. ###### Example Consider the following program: @@ -149,7 +147,6 @@ omitted, the name `b` would instead resolve to the package `a.b`, and, provided that package does not also contain a class `B`, a compiler-time error would result. - ## Programs A _program_ is a top-level object that has a member method @@ -161,7 +158,7 @@ passed to the `main` method as a parameter of type The `main` method of a program can be directly defined in the object, or it can be inherited. The scala library defines a special class `scala.App` whose body acts as a `main` method. -An objects $m$ inheriting from this class is thus a program, +An objects $m$ inheriting from this class is thus a program, which executes the initializaton code of the object $m$. ###### Example @@ -198,4 +195,3 @@ object HelloWorld extends App { println("Hello World") } ``` - |