Function isParamReference

src/javascript/params.ts:34–49

(node: MemberExpression)

  });

  function isParamReference(node: MemberExpression): node is ParamReference {
    if (
      node.object.type !== "MemberExpression" ||
      node.object.object.type !== "Identifier" ||
      node.object.object.name !== "observable" ||
      node.object.property.type !== "Identifier" ||
      node.object.property.name !== "params" ||
      !references.includes(node.object.object)
    ) {
      return false;
    }
    if (node.property.type !== "Identifier" && node.property.type !== "Literal") {
      throw syntaxError("invalid param reference", node, input);
    }
    return true;
  }

  return matches;
}