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

From: Corey Huinker <corey(dot)huinker(at)gmail(dot)com>
To: Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>
Cc: Erik Rijkers <er(at)xs4all(dot)nl>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Daniel Verite <daniel(at)manitou-mail(dot)org>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, PostgreSQL <pgsql-hackers(at)postgresql(dot)org>, pgsql-hackers-owner(at)postgresql(dot)org
Subject: Re: \if, \elseif, \else, \endif (was Re: PSQL commands: \quit_if, \quit_unless)
Date: 2017-02-10 22:09:44
Message-ID: CADkLM=cHpe1QUJYUFDau4yyAVOoZKK+wNMsoChbEHxyzm3DLFA@mail.gmail.com
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>
> calvin=> \if true
>
calvin?t=> SELECT 1 +
> calvin?t-> 2;
> 3
> calvin?t=> \if true
> calvin?t=> \echo hello
> hello
> calvin?t=> \endif
> calvin?t=> \else
> calvin?z=> \echo ignored
> calvin?t=> \endif
> calvin=>
>

Ok, so that's not just PROMPT_READY, that's every prompt...which might be
ok. ? is a great optional cue, and you're thinking on 2 levels deep, 2nd
level always being '.'? I'll give that a shot.

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