| 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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| Thread: | |
| Lists: | pgsql-hackers | 
> 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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