Re: string function - "format" function proposal

From: Itagaki Takahiro <itagaki(dot)takahiro(at)gmail(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: string function - "format" function proposal
Date: 2010-10-14 06:25:49
Message-ID: AANLkTimLcRjqT1umE6ntWyW8qEZtKG4PyjuxUL77G8=n@mail.gmail.com
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> Let's make format support %s, %i, and %l, as well as
> allowing things like %$3l (meaning, escape the third argument as a
> literal and interpolate here), and call it good.

Your idea is:
% [ $ pos ] format -- ex. %$3l , %l
Escapes: %% => %

Just for information, $ and pos are reversed in C sprintf.
% [ pos $ ] format -- ex. %3$l , %l
Escapes: %% => %

IMHO, I like {} syntax as like as C# because the format strings are extensible.
{ pos [ : format ] } -- ex {3:l}, {3} (, and {l} could be also supported)
Escapes: {{ => {, }} => }

--
Itagaki Takahiro

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