diff options
Diffstat (limited to 'website2/templates/features/experimental/var.html')
| -rw-r--r-- | website2/templates/features/experimental/var.html | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/website2/templates/features/experimental/var.html b/website2/templates/features/experimental/var.html new file mode 100644 index 00000000..fa35ac5e --- /dev/null +++ b/website2/templates/features/experimental/var.html @@ -0,0 +1,37 @@ +<#import "../_features.html" as f> + +<@f.scaffold title="var" logline="Modifiable local variables with a type inferred by assigning value."> + <@f.history> + <p> + <code>var</code> was introduced in lombok 1.16.12 as experimental feature. + </p> + </@f.history> + + <@f.experimental> + <ul> + <li> + This feature is very controversial. + </li><li> + There is <a href="http://openjdk.java.net/jeps/286">JEP 286</a> that should make <code>var</code> obsolete. + </li> + </ul> + Current status: <em>uncertain</em> – Currently we feel this feature cannot move out of experimental status. + </@f.experimental> + + <@f.overview> + <p> + <code>var</code> works exactly like <a href="/features/val"><code>val</code></a>, except the local variable is <em>not</em> marked as <code>final</code>. + </p><p> + The type is still entirely derived from the mandatory initializer expression, and any further assignments, while now legal (because the variable is no longer <code>final</code>), aren't looked at to determine the appropriate type.<br /> + For example, <code>var x = "Hello"; x = Color.RED;</code> does <em>not</em> work; the type of x will be inferred to be <code>java.lang.String</code> and thus, the <code>x = Color.RED</code> assignment will fail. If the type of <code>x</code> was inferred to be <code>java.lang.Object</code> this code would have compiled, but that's not how<code>var</code> works. + </p> + </@f.overview> + + <@f.confKeys> + <dt> + <code>lombok.var.flagUsage</code> = [<code>warning</code> | <code>error</code>] (default: not set) + </dt><dd> + Lombok will flag any usage of <code>var</code> as a warning or error if configured. + </dd> + </@f.confKeys> +</@f.scaffold> |