Support operator call

[DartBot]

This issue was originally filed by ms...@unipro.ru

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Support operator call for custom classes since it is already described in the specification.

[anders-sandholm]

Added Area-VM, Triaged labels.

[madsager]

Issue #1986 has been merged into this issue.

[sethladd]

Marked this as blocking #2931.

[iposva-google]

Added this to the M1 milestone.

[anders-sandholm]

Marked this as being blocked by #2931.

[iposva-google]

Removed this from the M1 milestone.
Added this to the M2 milestone.
Marked this as blocking #2931.
Unmarked this as blocking #2931.
Marked this as being blocked by #2931.
Unmarked this as being blocked by #2931.

[DartBot]

This comment was originally written by antonm@google.com

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Issue #5797 has been merged into this issue.

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cc @floitschG.

[dgrove]

Issue #5835 has been merged into this issue.

[crelier]

Set owner to @crelier.
Added Started label.
Unmarked this as being blocked by #2931.

[crelier]

Fixed at r16009.

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Added Fixed label.

[DartBot]

This comment was originally written by alexe.kaigorodov@gmail.com

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The co19 test 14_Types/5_Function_Types_A06_t01 still fails.

[crelier]

Thanks for triaging this test. There are 3 issues with it:

line 21: the call method is missing a body, making it abstract. Failing the test is therefore correct, since there is actually no call method.

line 37: wrong expectation. new J() is f.

line 41: wrong expectation. new K() is f.

Thanks,
Regis

[DartBot]

This comment was originally written by alexe.kaigorodov@gmail.com

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After fixing, the test still fails:
out/Debug_ia32/dart --ignore-unrecognized-flags --enable-type-checks /home/kaigorodov/dash/dash/co19/tests/co19/src/Language/14_Types/5_Function_Types_A06_t01.dart
Unhandled exception:
Expect.isTrue(false) fails.
#­0 Expect._fail (bootstrap:655:5)
#­1 Expect.isTrue (bootstrap:494:10)
#­2 main (file:///home/kaigorodov/dash/dash/co19/tests/co19/src/Language/14_Types/5_Function_Types_A06_t01.dart:33:16)

typedef void f(p1, p2);
class I {
  void call(a1, a2){}
}
Expect.isTrue(new I() is f); // line 33

Should be fixed with r16541