Function sideEffect

sideEffect<D, E>(sideEffect: ((state: ParseState<D, E>) => void)): TokenParser<D, E>
Defines a new TokenParser that will execute sideEffect with the ParseState passed to it and then return it.

sideEffect is only executed and does not return anything. It is only executed for it's side-effects.

Any side-effects executed may impose performance penalties to the parsing process, thus this functionality must be used with great care and only in non-critical paths.

It can be used for logging support.

Returns
A new TokenParser that will execute sideEffect and not change the result.
Type Parameters
- D extends Identifiable
- E extends Identifiable
Parameters
- sideEffect: ((state: ParseState<D, E>) => void)
  
  A callback that will be called to produce side effects based on the ParseState passed.
  - - (state: ParseState<D, E>): void
    - Parameters
      
      state: ParseState<D, E>
      
      Returns void
Returns TokenParser<D, E>
- Defined in index.ts:1151