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From "Christopher Smith (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GROOVY-8212) coerce GString to String when used as Map key
Date Thu, 01 Jun 2017 01:07:04 GMT
Christopher Smith created GROOVY-8212:
-----------------------------------------

             Summary: coerce GString to String when used as Map key
                 Key: GROOVY-8212
                 URL: https://issues.apache.org/jira/browse/GROOVY-8212
             Project: Groovy
          Issue Type: Bug
          Components: Static compilation, Static Type Checker
    Affects Versions: 2.4.10
            Reporter: Christopher Smith
            Priority: Minor


When a GString is used as the key for a bracket-style map get (in this case, from an overly
verbose CSV file):

{code}
row["$param URL"]
{code}

the {{GStringImpl}} object is passed directly to {{Map#get(Object)}}. Since GStrings are never
equal to Strings, this means that the get will always return null.

If {{row}} is explicitly declared as a {{Map<String,?>}}, however, Groovy ought to identify
the intended behavior (using a templated string as a map key) and use the string value instead.

The current behavior is a problem because even in static compilation mode, where the generic
key bound is known, Groovy does not complain about the use of a GString here (because it normally
treats GStrings as valid for {{String}} targets?), but the lookup will fail at runtime.



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