Function walkNode

packages/cli-lib/svelte_extractor.ts:137–239

(
  node: SvelteNode,
  source: string,
  parseScriptFn: ScriptParseFn
)

}

function walkNode(
  node: SvelteNode,
  source: string,
  parseScriptFn: ScriptParseFn
): void {
  switch (node.type) {
    case 'ExpressionTag':
      extractExpression(node.expression, source, parseScriptFn)
      break

    case 'ConstTag':
      // {@const x = expr} — the declaration contains the expression
      if (node.declaration) {
        const content = source.slice(
          node.declaration.start,
          node.declaration.end
        )
        try {
          parseScriptFn(content)
        } catch (e) {
          console.warn(
            `Failed to parse const declaration. Ignore this if content has no extractable message`,
            e
          )
        }
      }
      break

    case 'IfBlock':
      extractExpression(node.test, source, parseScriptFn)
      walkFragment(node.consequent, source, parseScriptFn)
      walkFragment(node.alternate, source, parseScriptFn)
      break

    case 'EachBlock':
      extractExpression(node.expression, source, parseScriptFn)
      if (node.key) {
        extractExpression(node.key, source, parseScriptFn)
      }
      walkFragment(node.body, source, parseScriptFn)
      walkFragment(node.fallback, source, parseScriptFn)
      break

    case 'AwaitBlock':
      extractExpression(node.expression, source, parseScriptFn)
      walkFragment(node.pending, source, parseScriptFn)
      walkFragment(node.then, source, parseScriptFn)
      walkFragment(node.catch, source, parseScriptFn)
      break

    case 'KeyBlock':
      extractExpression(node.expression, source, parseScriptFn)
      walkFragment(node.fragment, source, parseScriptFn)
      break

    case 'SnippetBlock':
      walkFragment(node.body, source, parseScriptFn)
      break