mbien commented on code in PR #4278:
URL: https://github.com/apache/netbeans/pull/4278#discussion_r906362247
##########
java/java.hints/src/org/netbeans/modules/java/hints/suggestions/Tiny.java:
##########
@@ -400,4 +402,18 @@ protected void performRewrite(final TransformationContext
ctx) {
}
+ @Hint(displayName =
"#DN_org.netbeans.modules.java.hints.suggestions.Tiny.inlineRedundantVar",
description =
"#DESC_org.netbeans.modules.java.hints.suggestions.Tiny.inlineRedundantVar",
category="suggestions", severity=Severity.HINT)
+ @TriggerPattern(value="$before$; $type $var = $init; $statements$; return
$var;")
+ public static ErrorDescription inlineRedundantVar(HintContext ctx) {
+ TreePath var = ctx.getVariables().get("$var");
+ Collection<? extends TreePath> stats =
ctx.getMultiVariables().get("$statements$");
+ if (var != null && stats != null) {
+ Element element = ctx.getInfo().getTrees().getElement(var);
+ if (element != null && element.getKind() ==
ElementKind.LOCAL_VARIABLE && !Utilities.isReferencedIn(ctx.getInfo(), var,
stats)) {
Review Comment:
I like your first solution. I maintain a list of jackpot rules I used myself
over time (https://github.com/mbien/jackpot-inspections) and the first FAQ
entry is:
Q: Can I apply suggested inspections without code review and testing?
A: No.
I don't think all hints have to be fool proof it it is communicated to the
user that they can be risky. Like switching out StringBuffer with Builder will
work in 99% of the time, but fail in the one case when someone actually shared
it between threads. I believe this is completely OK.
Thats why I am somewhat for reverting it to the more aggressive version
which uses `!referencedIn` as best effort attempt to suggest the right thing.
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