Re: [HACKERS] \if, \elseif, \else, \endif (was Re: PSQL commands:\quit_if, \quit_unless)

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От	Corey Huinker
Тема	Re: [HACKERS] \if, \elseif, \else, \endif (was Re: PSQL commands:\quit_if, \quit_unless)
Дата	3 марта 2017 г. 09:53:15
Msg-id	CADkLM=dLtw4GtfbZM=jTgsp3nQ1r6DcSque-DxV7fJ0rYqhyRw@mail.gmail.com обсуждение исходный текст
Ответ на	Re: [HACKERS] \if, \elseif, \else, \endif (was Re: PSQL commands:\quit_if, \quit_unless) (Fabien COELHO <coelho@cri.ensmp.fr>)
Ответы	Re: [HACKERS] \if, \elseif, \else, \endif (was Re: PSQL commands:\quit_if, \quit_unless) Re: [HACKERS] \if, \elseif, \else, \endif (was Re: PSQL commands: \quit_if, \quit_unless) Re: [HACKERS] \if, \elseif, \else, \endif (was Re: PSQL commands: \quit_if, \quit_unless)
Список	pgsql-hackers

On Fri, Mar 3, 2017 at 1:25 AM, Fabien COELHO <coelho@cri.ensmp.fr> wrote:

For endif, I really exagerated, "switch { defaut: " is too much, please accept my apology. Maybe just do the pop & error reporting?

It seemed like overkill, but I decided to roll with it.

Or maybe be more explicit:

switch (current state)
case NONE:
error no matching if;
case ELSE_FALSE:
case ELSE_TRUE:
case ...:
pop;
Assert(success);

the pop() function tests for an empty stack, so this switch is double-testing, but it's also no big deal, so here you go...

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