Function precedingSpec

src/extraction/languages/erlang.ts:82–90

The -spec directly above a function (comments may sit between), if it names it.

(node: SyntaxNode, name: string, source: string)

/** The -spec directly above a function (comments may sit between), if it names it. */
function precedingSpec(node: SyntaxNode, name: string, source: string): SyntaxNode | null {
  let prev = node.previousNamedSibling;
  while (prev && prev.type === 'comment') prev = prev.previousNamedSibling;
  if (prev?.type === 'spec') {
    const specFun = getChildByField(prev, 'fun');
    if (specFun && atomText(specFun, source) === name) return prev;
  }
  return null;
}

/** `name(Args) when Guard` — the clause text up to the `->`. */
function clauseHeader(clause: SyntaxNode, source: string): string | undefined {