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mastodon
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mastodon/app/lib/scope_parser.rb

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# frozen_string_literal: true
class ScopeParser < Parslet::Parser
rule(:term) { match('[a-z]').repeat(1).as(:term) }
rule(:colon) { str(':') }
rule(:access) { (str('write') | str('read')).as(:access) }
rule(:namespace) { str('admin').as(:namespace) }
rule(:scope) { ((namespace >> colon).maybe >> ((access >> colon >> term) | access | term)).as(:scope) }
root(:scope)
end