GitHub user srowen opened a pull request:
https://github.com/apache/spark/pull/404
SPARK-1488. Resolve scalac feature warnings during build
For your consideration: scalac currently notes a number of feature warnings
during compilation:
```
[warn] there were 65 feature warning(s); re-run with -feature for details
```
Warnings are like:
```
[warn]
/Users/srowen/Documents/spark/core/src/main/scala/org/apache/spark/SparkContext.scala:1261:
implicit conversion method rddToPairRDDFunctions should be enabled
[warn] by making the implicit value scala.language.implicitConversions
visible.
[warn] This can be achieved by adding the import clause 'import
scala.language.implicitConversions'
[warn] or by setting the compiler option -language:implicitConversions.
[warn] See the Scala docs for value scala.language.implicitConversions for
a discussion
[warn] why the feature should be explicitly enabled.
[warn] implicit def rddToPairRDDFunctions[K: ClassTag, V: ClassTag](rdd:
RDD[(K, V)]) =
[warn] ^
```
scalac is suggesting that it's just best practice to explicitly enable
certain language features by importing them where used.
This PR simply adds the imports it suggests (and squashes one other Java
warning along the way). This leaves just deprecation warnings in the build.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/srowen/spark SPARK-1488
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/404.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #404
----
commit 39bc83115d5a55527e4f893fd480039896b6a63f
Author: Sean Owen <[email protected]>
Date: 2014-04-08T11:24:28Z
Enable -feature in scalac to emit language feature warnings
commit 859898002573f24c53d458db3e61b91b3c9da841
Author: Sean Owen <[email protected]>
Date: 2014-04-08T12:09:45Z
Quiet scalac warnings about language features by explicitly importing
language features.
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