assumesTopLevelDictionary
Specifies that decoding assumes the top level of the JSON data is a dictionary, even if it doesn’t begin and end with braces.
Declaration
var assumesTopLevelDictionary: Bool { get set }Discussion
This is an extension to JSON5 that’s not part of the specification. AttributedString uses this option, along with allowsJSON5, to support the use of JSON5 inside Markdown strings that use multiple custom attributes. Using assumesTopLevelDictionary allows for the following syntax inside the parentheses of the custom attribute markup:
This is a [Markdown](https://commonmark.org) string with a ^[custom attribute](factor: 10, other: true).Without assumesTopLevelDictionary, the markup would have to use explicit enclosing braces to declare the contents of the parentheses to be a dictionary:
This is a [Markdown](https://commonmark.org) string with a ^[custom attribute]({factor: 10, other: true}).When you use braces, you must use matched pairs. This means that with assumesTopLevelDictionary set, the syntax ({…}) and (…) are both legal, but ({…) and (…}) are not.