Function modFormatter

modFormatter(f: EndoOf<EndoOf<string>>): EndoOf<Draw.Theme>

Function

Modify the formatter function of a tree theme using the given function.

Parameters

f: EndoOf<EndoOf<string>>
Will be given the formatter function and expected to return an updated value.

Returns EndoOf<Draw.Theme>

Example

import {Draw, from, of} from 'effect-tree'
import {pipe, flow} from 'effect'

const theme: Draw.Theme = pipe(
  Draw.getTheme('thin'),
  Draw.modFormatter(f => flow(f, label  => `«${label}»`)),
)

const tree = from('a', of('b'), of('c'))

expect(Draw.themedTree(tree, theme)).toEqual([
  '┬«a» ',
  '├─«b»',
  '└─«c»',
])