RFR: 8272135: jshell: Method cannot use its overloaded version

[Jan Lahoda]

Consider separate snippets like:

int m(int i) { return 1; }

and:

int m(String s) { return m(0); }


If these are independent snippets, JShell will currently compile first the first snippet (say into class called `A`), and then the second snippet. The actual code for the second snippet will be in this direction:

import static A.m;
public class B {
    int m(String s) { return m(0); }
}


Note that here the method resolution, when seeing method name `m`, will not see the `m(int)` method at all, as the lookup will stop on the current class' method called `m` and will never proceed to look at the `m` method from the first snippet/class `A`.

JShell generally tries to coalescence processing of overloading methods (in the `Unit.setWrap` method), but the overloaded methods must be together part of the input, which is not the case in the above example.

The proposed solution is to detect the possibility of the above situation (call of a method that has the same name as the current snippet's method), and add all same-named overloads to the processing set.

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Commit messages:
 - 8272135: jshell: Method cannot use its overloaded version

Changes: https://git.openjdk.java.net/jdk/pull/5111/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5111&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272135
  Stats: 108 lines in 4 files changed: 89 ins; 0 del; 19 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5111.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5111/head:pull/5111

PR: https://git.openjdk.java.net/jdk/pull/5111