On 2/20/25 16:19, Jonathan Wakely wrote:
>
>
> On Thu, 20 Feb 2025 at 20:41, Phil Bouchard via Std-Proposals
> <std-proposals_at_[hidden] <mailto:std-proposals_at_[hidden]>>
> wrote:
>
> regex_match would get 1 more character on the need basis using in.get()
> quite simply. If it fails then it would rewind the read pointer to
> where
> it was.
>
>
> How? iostream putback is extremely limited.

Using seekg().

>
>
>
> I think that's a pretty efficient way of writing a decent parser.
>
>
> Extracting one char at a time and then using std::regex repeatedly is
> anything but efficient.
>

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