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https://issues.apache.org/jira/browse/GROOVY-7934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17789210#comment-17789210
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Eric Milles commented on GROOVY-7934:
-------------------------------------
https://github.com/apache/groovy/commit/7e0471f7ff2e1cfbf77f67997e605990d6ed19f3
> Type inference breaks for Collection.inject
> -------------------------------------------
>
> Key: GROOVY-7934
> URL: https://issues.apache.org/jira/browse/GROOVY-7934
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 2.4.6
> Reporter: Oliver Holp
> Assignee: Eric Milles
> Priority: Minor
> Labels: CompileStatic
>
> The code below should not compile as the first parameter to the inject method
> must be a string, but the integer 0 is handed in:
> {code:groovy}
> @CompileStatic
> public static void main(String[] args) {
> def inList = ["a", "b", "c"]
> def outList = inList.inject(0, { a, b -> a + "," + b })
> println(outList)
> }
> {code}
> I opened this issue as adviced in the reply to the same issue I asked on
> stackoverflow:
> http://stackoverflow.com/questions/39444838/chance-for-this-hole-in-groovy-staic-typing-to-be-fixed/39446458#39446458
> Java streams example (from link):
> {code:java}
> var list = java.util.Arrays.asList("a", "b", "c");
> var out = list.stream().reduce(0, (x,y) -> x + y);
> System.out.println(out);
> {code}
> NOTE: You can use java streams apis in groovy:
> {code:groovy}
> @groovy.transform.CompileStatic
> void test() {
> def list = ['a','b','c']
> def str = list.stream().reduce("", (x,y) -> x + y) // STC error if "" is 0
> println str
> }
> test()
> {code}
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