ast-grep: Utility Rule

code:yaml

# define util rules using utils field

utils:

# it accepts a string-keyed dictionary of rule object

is-literal: # rule-id

any: # actual rule object

- kind: 'false'

- kind: undefined

- kind: 'null'

- kind: 'true'

- kind: regex

- kind: number

- kind: string

rule:

any:

- matches: is-literal # reference the util!

- kind: array

has:

matches: is-literal # reference it again!

↑これはlocal utility rule

globalに定義したいなら