On Fri, 8 Apr 2022 at 00:48, Stephen J. Turnbull
<stephenjturnb...@gmail.com> wrote:
> 1. Syntax, aka language support (the original suggestion of
> user-defined literals fits here because either the way numbers are
> parsed or the way '_' is parsed would have to change).
>
> It's very difficult to get *any* syntax change in. In particular,
> changing '_' from an identifier component to an operator for
> combining numeric literals would invalidate *tons* of code
> (including internationalization code that is the 0.454kg nearest
> my heart). I can't imagine that being possible.
>>> 123_456
123456
>>> 123_456_
File "<stdin>", line 1
123_456_
^
SyntaxError: invalid decimal literal
Trailing underscore is currently invalid, so that would be fine.
ChrisA
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