JRuby compiler breaks on array return values
--------------------------------------------
Key: JRUBY-4991
URL: http://jira.codehaus.org/browse/JRUBY-4991
Project: JRuby
Issue Type: Bug
Components: Compiler
Affects Versions: JRuby 1.6
Environment: JVM 6 on WinXP
Reporter: Ian Dees
Attachments: array.patch, wrap.patch
Trying to compile the following code with {{jrubyc --javac}}:
{noformat}
require 'java'
class DoubleTest
java_signature 'double[] array()'
def array
[42.0]
end
end
{noformat}
... chokes, because the generated Java code for the return function ends with
this:
{noformat}
return ()ruby_result.toJava(double[].class);
{noformat}
... instead of this:
{noformat}
return (double[])ruby_result.toJava(double[].class);
{noformat}
There are two issues here. The first is that {{ArrayNodeType}}'s
{{getWrapperType()}} isn't returning anything. The attached {{wrap.patch}}
fixes the issue.
The second issue is that, even with a wrapper type, the generated Java code
still fails to compile because it's trying to return a {{Double[]}} as a
{{double[]}}. Returning a boxed type from a function declared with a primitive
return type appears only to work with scalars. The attached {{array.patch}}
changes the Ruby side of the compiler code to use the actual type name instead
of the wrapped one--but just for arrays.
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