Matrix operator

[kwinso]

I've seen "limits" is defined with mathop

I've been using limits(A)_(m xx n) to define matrix name with it's size. Not a convenient thing tbh.

I wonder is it possible to add new mat or matrix operator defined with mathop, which will do this. I image the API like this:

• mat(A, n) -> limits(A)_(n xx n)
• mat(A, m, n) -> limits(A)_(m xx n)

[kwinso]

Also, what about some API to define these custom operators the way we do it in symbols.json (with placeholders for value)?

[widcardw]

asciimath-parser uses replaceBeforeTokenizing as one of its config params. It is a preprocess before the formula is passed into the parser. I can replace the matched token and replace it with common asciimath.

For example, the expression should be

[
  [/mat\(([^,]+?),([^,]+?),([^\)]+?)\)/g,
   (_, $1, $2, $3) => `limits(${$1})_(${$2} xx ${$3})`]
]

However, it's unsafe to execute user written code and inject it into the program. I haven't thought about how to implement this feature in Obsidian plugin safely.

[widcardw]

Also, what about some API to define these custom operators the way we do it in symbols.json (with placeholders for value)?

asciimath-parser is written in pure algorithm instead of grammar tools like antlr. So it may be hard to change the current grammar, or use it like C/C++ and define macros...