Are there Unicode symbols for parenthesis generator symbols?

[Philippe Verdy]

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
operators...

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:
> >
> >
> https://books.google.com/books?id=05xA_d5dSwAC&pg=PA267&lpg=PA267&dq=parenthesis+generator+symbols&source=bl&ots=3OwyeBndO8&sig=ZhwoeYRJjm3GTzNNP1vgsAVRisc&hl=en&sa=X&sqi=2&ved=0ahUKEwi577X-o8XNAhWBaz4KHc0QA_EQ6AEIIzAB#v=onepage&q=parenthesis%20generator%20symbols&f=false
> >
> > 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)
>
> Andrew
>
>
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