Are there Unicode symbols for parenthesis generator symbols?
verdy_p at wanadoo.fr
Sun Jun 26 08:13:11 CDT 2016
The encoded variants are U+2A7E (⩿) and U+2A7F (⪀) but with the lower bar
slanted rather than horizontal.
May be we could encode them with variant selectors (like for the two known
variants of ≤ and ≥) ?
2016-06-26 15:00 GMT+02:00 Philippe Verdy <verdy_p at wanadoo.fr>:
> But there are also variants of U+2264 (≤) and U+2265 (≥) with dots within
> the bracket (starting page 973 in the same book) for "weak precedence" of
> These variants (used to compine ⋖ or ⋗ with ≐) don't seem to be encoded.
> 2016-06-26 11:38 GMT+02:00 Andrew West <andrewcwest at gmail.com>:
>> On 26 June 2016 at 09:37, Costello, Roger L. <costello at mitre.org> wrote:
>> > In the book Parsing Techniques the authors use a less than symbol with
>> a dot tucked inside for the open parenthesis and a greater than symbol with
>> a dot tucked insider for the close parenthesis. Also, they use an equal
>> sign with a dot over it. You can see the 3 symbols here:
>> > Are there Unicode symbols for the 3 symbols?
>> Yes, and they have all been around since Unicode 1.0:
>> U+22D6 ⋖
>> U+22D7 ⋗
>> U+2250 ≐ (named APPROACHES THE LIMIT)
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