diff options
author | Som Snytt <som.snytt@gmail.com> | 2016-09-19 00:46:17 -0700 |
---|---|---|
committer | Som Snytt <som.snytt@gmail.com> | 2017-03-11 23:38:08 -0800 |
commit | 22f98d5189b61200aaf11cec7a0a96d5cfa86a5e (patch) | |
tree | aa90424f6dd21609090ae8fbffb5410ca80f4edf /test/files/neg/warn-unused-params.check | |
parent | 94b938bb290a231694e5721368023bd6693bb2ed (diff) | |
download | scala-22f98d5189b61200aaf11cec7a0a96d5cfa86a5e.tar.gz scala-22f98d5189b61200aaf11cec7a0a96d5cfa86a5e.tar.bz2 scala-22f98d5189b61200aaf11cec7a0a96d5cfa86a5e.zip |
SI-8040 Warn unused parameters
One can `-Ywarn-unused:params` or more narrowly warn only for
unused implicit parameters with `-Ywarn-unused:implicits`.
Params includes constructor parameters.
The settings for privates and locals are not yet distinguished.
```
$ skalac -Ywarn-unused:help
Enable or disable specific `unused' warnings
imports Warn if an import selector is not referenced.
patvars Warn if a variable bound in a pattern is unused.
privates Warn if a private member is unused.
locals Warn if a local definition is unused.
params Warn if a value parameter is unused.
implicits Warn if an implicit parameter is unused.
```
Diffstat (limited to 'test/files/neg/warn-unused-params.check')
-rw-r--r-- | test/files/neg/warn-unused-params.check | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/files/neg/warn-unused-params.check b/test/files/neg/warn-unused-params.check new file mode 100644 index 0000000000..ca6320ccd9 --- /dev/null +++ b/test/files/neg/warn-unused-params.check @@ -0,0 +1,18 @@ +warn-unused-params.scala:9: warning: parameter value b in method f is never used + b: String, // warn + ^ +warn-unused-params.scala:32: warning: parameter value s in method i is never used + def i(implicit s: String) = 42 // yes, warn + ^ +warn-unused-params.scala:49: warning: parameter value u in class Unusing is never used +class Unusing(u: Int) { // warn + ^ +warn-unused-params.scala:57: warning: parameter value s in class CaseyAtTheBat is never used +case class CaseyAtTheBat(k: Int)(s: String) // warn + ^ +warn-unused-params.scala:60: warning: parameter value readResolve in method f is never used + def f(readResolve: Int) = 42 // warn + ^ +error: No warnings can be incurred under -Xfatal-warnings. +5 warnings found +one error found |