| Commit message (Collapse) | Author | Age | Files | Lines |
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Longer name, but it doesn't lie. We have no data structure right now for
combining multiple code points. And it makes no sense for the notion of
a grapheme to conflate its Unicode encoding.
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Unix text-mode terminals transparently support utf-8 these days, and so
I treat utf-8 sequences (which I call graphemes in Mu) as fundamental.
I then blindly carried over this state of affairs to bare-metal Mu,
where it makes no sense. If you don't have a terminal handling
font-rendering for you, fonts are most often indexed by code points and
not utf-8 sequences.
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Now that it's been used in a second app without needing any changes.
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We support 128px, so let's use the whole 128px.
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Not quite working yet. Only the very first rendering succeeds. After
that any keypress triggers a second render which aborts. Image is
getting corrupted in memory somehow.
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I'm loading them in uncompressed ASCII format, and all streams and gap
buffers all over the place need to get massively scaled up to 256KB
capacity. But the tests don't yet run out of RAM, so I'll keep going.
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This was the whole proximal goal in implementing balanced terminals.
Printing these is still unreliable. It always surrounds in [], which may
not work.
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I've always been dissatisfied with the notion of escaping. It introduces
a special-case meta-notation within the tokenizer, and the conventional
approach leads to exponential "leaning toothpick syndrome" with each
level of escaping.
One potential "correct" solution is to keep string terminals
parameterizable:
[abc] => abc
[=] => =
[=[abc]=] => abc
[=[a]bc]=] => a]bc
[==[a]=]bc]==] => a]=]bc
..and so on. Basically the terminals grow linearly as the number of
escapings grow.
While this is workable, I'd like to wait until I actually need it, and
then gauge whether the need is a sign of the stack growing too complex,
with too many layers of notation/parsing. Mu's goal is just 3 notations,
and it's going to require constant vigilance to keep that from growing.
Therefore, for now, there are two notations for string literals, one
symmetric and one balanced:
"abc" => abc
[abc] => abc
The balancing notation permits nested brackets as long as they balance.
[abc [def]] => abc [def]
If you need unbalanced square brackets, use the symmetric terminals:
"abc [def" => abc [def
If you need double quotes inside strings, use the balanced notation:
[abc "def] => abc "def
If you need _both_ square brackets (whether balanced or unbalanced) and
double quotes, you're currently shit outta luck.
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Super slow; each frame is cleared as a sort of progress indicator while
it computes the next frame.
In the process I realize I need to adjust every single trace in the
shell sources to be more fault-tolerant to a filled-up trace stream.
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Smoked out some issues by rendering a single frame of Game of Life.
Incredibly slow.
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