Alex Lam S.L f7ca4f2297 fix corner cases in switch and undefined (#1762) ...

- fix side effects in switch condition for singular blocks
- fix `undefined` confusion with local variable
- gate `OPT(AST_Switch)` with `switches`

fixes #1758
fixes #1759

2017-04-02 14:52:25 +08:00

14 KiB

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