Function extractRuntimeEmits

packages/compiler-sfc/src/script/defineEmits.ts:73–103

(ctx: TypeResolveContext)

}

export function extractRuntimeEmits(ctx: TypeResolveContext): Set<string> {
  const emits = new Set<string>()
  const node = ctx.emitsTypeDecl!

  if (node.type === 'TSFunctionType') {
    extractEventNames(ctx, node.parameters[0], emits)
    return emits
  }

  const { props, calls } = resolveTypeElements(ctx, node)

  let hasProperty = false
  for (const key in props) {
    emits.add(key)
    hasProperty = true
  }

  if (calls) {
    if (hasProperty) {
      ctx.error(
        `defineEmits() type cannot mixed call signature and property syntax.`,
        node,
      )
    }
    for (const call of calls) {
      extractEventNames(ctx, call.parameters[0], emits)
    }
  }

  return emits
}

function extractEventNames(
  ctx: TypeResolveContext,