Re: boolean <=> text explicit casts

On Mon, 2007-28-05 at 15:38 -0400, Tom Lane wrote:
> More generally, I'm really hoping to get rid of bespoke text<->whatever
> cast functions in favor of using datatypes' I/O functions. To what
> extent can we make the boolean I/O functions serve for this? It seems
> relatively painless on the input side --- just allow whitespace --- but
> I suppose we can't change boolout's historical result of "t"/"f" without
> causing problems.

Attached is a revised version of this patch that modifies boolin() to
ignore leading and trailing whitespace. This makes text => boolean
trivial, but boolean => text is still distinct from boolout().

Barring any objections, I'll apply this later today or tomorrow.

-Neil