What should the following method do?
static def foo():int {
return at (here.next()) {
return 0;
};
}
According to the language report it is fundamentally correct to put
"return" into an at expression. However, the report also says
Limitation: X10 does not currently allow break, continue, or return
to exit from an at.
In my opinion, the X10 compiler should output a warning, that this is
"not yet implemented" or something. The generated C++ code looks as
intended, though.
Removing the first return, should still be correct code:
static def foo():int {
at (here.next()) {
return 0;
};
}
However, this results in the following (incorrect) errors.
Test.x10:4: Cannot return value from void method or closure.
Test.x10:4: Cannot return expression; base type incompatible with method
return type.
Expression: 0
Base type: x10.lang.Int
Expected base type: void
Test.x10:5: Unreachable statement.
3 errors.
--
Andreas Zwinkau
Karlsruhe Institute of Technology (KIT)
Institut für Programmstrukturen und Datenorganisation (IPD)
Lehrstuhl Prof. Snelting
Adenauerring 20a
76131 Karlsruhe
Phone: +49 721 608 48351
Fax: +49 721 608 48457
Email: zwin...@kit.edu
Web: http://pp.info.uni-karlsruhe.de/person.php?id=107
KIT – University of the State of Baden-Wuerttemberg and
National Research Center of the Helmholtz Association
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