Bracket, brace, parenthesis

I found the following code in multirangetypes.c

>	if (*ptr == '{')
>		ptr++;
>	else
>		ereport(ERROR,
>				(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
>				 errmsg("malformed multirange literal: \"%s\"",
>						input_str),
>				 errdetail("Missing left bracket.")));

I'm not sure how much we (or people) are strcit on the distinction
between the $SUBJECT, isn't '{' a brace generally?

postgres=# select '[1,3]'::int4multirange;
ERROR:  malformed multirange literal: "[1,3]"
LINE 1: select '[1,3]'::int4multirange;
               ^
DETAIL:  Missing left bracket.

The distinction is significant there.  It should at least be "Missing
left curly bracket." or "Missing left brace." (or left curly brace..?)

'{' is mentioned as "curly brackets" in comments of the soruce file.
It is mentioned as "brace" in regexp doc [1].  And.. uh.. I found the
world "curly braces" in the doc for conding conventions..

[1]: https://www.postgresql.org/docs/devel/functions-matching.html

regards.

-- 
Kyotaro Horiguchi
NTT Open Source Software Center