Horton

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

Fabien COELHO <coelho@cri.ensmp.fr>

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From: Fabien COELHO <coelho@cri.ensmp.fr>
To: Corey Huinker <corey.huinker@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Greg Stark <stark@mit.edu>, Erik Rijkers <er@xs4all.nl>, Robert Haas <robertmhaas@gmail.com>, Daniel Verite <daniel@manitou-mail.org>, Jim Nasby <Jim.Nasby@bluetreble.com>, PostgreSQL <pgsql-hackers@postgresql.org>, pgsql-hackers-owner@postgresql.org
Date: 2017-03-03T06:25:09Z
Lists: pgsql-hackers 

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

Or maybe be more explicit:

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

-- 
Fabien.

Commits

  1. Support \if ... \elif ... \else ... \endif in psql scripting.

  2. Add a "void *" passthrough pointer for psqlscan.l's callback functions.