Parse setting macros like `lineskip`

[rrrnld]

How would I parse macros like this?

\topskip=40pt
\parskip=10pt
\parindent=0pt
\baselineskip=15pt

I have tried this:

const macrosWithSetting: {
  signature?: string
  argumentParser: ArgumentParser
} = {
  argumentParser: (nodes, startPos) => {
    // parses things like `\lineskip=-\baselineskip`
    // nodes[startPos] is the equality sign
    const value = nodes[startPos + 1]
    const args = [
      value, // value or "-"
      ...(value.type === 'string' && value.content === '-' // actual value if value === '-'
        ? [nodes[startPos + 2]]
        : []),
    ].map((n) => arg(n))
    return {
      args,
      nodesRemoved: args.length,
    }
  },
}

But it doesn't to collect the arguments / remove them from the AST.

[siefkenj]

In your function you should actually mutate the array by using .splice on nodes. That is why nodesRemoved is important, so that the caller knows how the array changed.

If you check in the linters, there should be some code that detects = followed by units that you could use.