Should the delimiters change?

[CAD97]

If we decide to support AsciiMath (#1), then the display-math ```math is ambiguous.

Options:

• Use ```katex and ```asciimath (or latex), which become class="language-katex" and class="language-asciimath" in html
• Use ```math and ```asciimath, which become class="language-math" and class="language-asciimath"
• Use ```math,katex and ```math,asciimath, which I think becomes class="language-math,katex",class="language-math,asciimath"` -- That's what the reference implementation outputs, anyway.

If that's what pulldown-cmark does, then I think the third option is the best one.

[CAD97]

What does GitHub do?

f(x) = \int_{-\infty}^\infty
  \hat f(\xi)\,e^{2 \pi i \xi x}
  \,d\xi

<pre lang="math,katex"><code>f(x) = \int_{-\infty}^\infty
  \hat f(\xi)\,e^{2 \pi i \xi x}
  \,d\xi
</code></pre>

[CAD97]

Reusing class="language-katex" is probably not a good idea, as that should render the code block as katex code, not interpret it. Same with class="language-asciimath". Someone might do syntax highlighting for it, or want to show off their asciimath code.

[CAD97]

Inline math is a lot more up in the air.

I chose $1+1$, as its fallback to code-blocks parallels what seems like the obvious choice for display-style, that is the <code> block with class language-math, as that's what it is. But for inline code blocks, CommonMark doesn't give a way to specify the class of the rendered HTML node.

If we add AsciiMath, then we need different markers for inline AsciiMath.