[Pitch] Regex builder DSL

[rxwei (Richard Wei)]

@Dante-Broggi

While I like the API in general, I was wondering about the possibility of extending this syntax to non-String Collections and custom Element types.

In the fullness of time, we want to have a generic Pattern type with a builder DSL like this as shown in Declarative String Processing Overview to support general-purpose data processing. Regex is a scoped-down version of that, but aims to offer better familiarity and adopt regex conventions, e.g. to have .0 refer to the whole match followed by captures. Regex could conform to a future PatternComponent protocol and be used in a pattern builder block.