json5Allowed
Specifies that reading serialized JSON data supports the JSON5 syntax.
Declaration
static var json5Allowed: JSONSerialization.ReadingOptions { get }Discussion
The JSON5 Data Interchange Format is a superset of JSON that enhances human-readability of the JSON syntax. The JSON5 standard allows the following:
Single- or double-quoted strings.
Strings that span multiple lines.
Single- and multiline comments, using
//and/* … */syntax.Enhanced number formatting support, including hexadecimal, leading or trailing decimal point, explicit plus sign, and IEEE 754 positive infinity, negative infinity, and
NaN.
Using JSON5 in Attributed Strings
The Markdown syntax supported by AttributedString uses JSON5 to support an extended attribute syntax. Automatic grammar agreement uses this syntax for its inflect attribute, as do custom attributes defined by third-party frameworks. Use the syntax ^[text](attribute: value) to mark ranges of text decorated with a custom attribute, like this:
This is a [Markdown](https://commonmark.org) string with a ^[custom attribute](factor: 10).This example applies a custom attribute called factor with a value of 10 to the text “custom attribute” in the resulting attributed string. The portion inside the parentheses is JSON5. AttributedString also uses the topLevelDictionaryAssumed option; without it, the Markdown string would have to wrap everything inside the parentheses with braces.