Invisible operators
Nobody has claimed this yet.
Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 38/100
Research direction
The issue names no source files, tests, or entry points; start by locating the sym symbol definitions in the repository and review sections 2.14 of UTR #25 and 22.6 of the Unicode 16.0.0 Core Specification. Done means the four proposed invisible operators have documented names and symbol variants under sym, with the default math-font concern checked.
Written by the indexing model from the issue text.
Description
Context
Unicode defines multiple invisible operators, which are meant to disambiguate juxtaposition in mathematical text. This is primarily destined to be used by symbolic calculation softwares and screen readers. Their use is not mandatory but recommended to improve accessibility.
Invisible operators are the topic of section 2.14 of UTR #25 (the Technical Report on Unicode Support for Mathematics), and section 22.6 of the more recent, and authoritative Unicode 16.0.0 Core Specification.
Invisible operators were previously mentioned in https://github.com/typst/typst/issues/721#issuecomment-2351122402.
Formal proposal
Add the symbol variants from the following table under sym.
| Character | Name |
|---|---|
| U+2061 FUNCTION APPLICATION (Binary) | ???[^1] |
| U+2062 INVISIBLE TIMES (Binary) | times.invisible |
| U+2063 INVISIBLE SEPARATOR (Punctuation) | comma.invisible[^2] |
| U+2024 INVISIBL PLUS (Special) | plus.invisible |
[^1]: TODO: Find a name.
[^2]: U+2063 has the Unicode informative alias "invisible comma."
Alternative names
Other possible names include invisible.{application,times,comma,plus}.
Concerns
Invisible operators seem to not be handled properly by the default math font.
- Dominant language
- Rust
- Stars
- 53
- Forks
- 22
- PR merge metrics
- No merged PRs in 30d
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
More from typst/codex
-
Difficulty 4/5 3-5 days Newbie friendliness 35/100
-
Difficulty 3/5 1-2 days Newbie friendliness 55/100
-
Difficulty 2/5 1-3 hours Newbie friendliness 35/100
-
proposal
Difficulty 5/5 Over a week Newbie friendliness 25/100
-
Lack of ⊻ U+22BB Openproposal
Difficulty 2/5 1-3 hours Newbie friendliness 45/100
Similar issues
-
Browser (wasm) relay client cannot connect to relays whose URL has a trailing-dot FQDN hostname Open
Difficulty 2/5 1-3 hours Newbie friendliness 75/100
n0-computer/iroh#4550 ·
-
Difficulty 2/5 1-3 hours Newbie friendliness 65/100
paritytech/zombienet-sdk#591 ·
-
Difficulty 2/5 1-3 hours Newbie friendliness 75/100
farion1231/cc-switch#7638 · 1 comment ·
-
onnx-ir re-exports ModelProto and GraphProto but not NodeProto, AttributeProto and AttributeType Open
Difficulty 2/5 1-3 hours Newbie friendliness 75/100
-
Difficulty 2/5 1-3 hours Newbie friendliness 75/100