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# frozen_string_literal: true
module Regexp::Expression
# A sequence of expressions. Differs from a Subexpressions by how it handles
# quantifiers, as it applies them to its last element instead of itself as
# a whole subexpression.
#
# Used as the base class for the Alternation alternatives, Conditional
# branches, and CharacterSet::Intersection intersected sequences.
class Sequence < Regexp::Expression::Subexpression
class << self
def add_to(exp, params = {}, active_opts = {})
sequence = construct(
level: exp.level,
set_level: exp.set_level,
conditional_level: params[:conditional_level] || exp.conditional_level,
ts: params[:ts],
)
sequence.options = active_opts
exp.expressions << sequence
sequence
end
end
def ts
(head = expressions.first) ? head.ts : @ts
end
def quantify(token, *args)
extract_quantifier_target(token.text).quantify(token, *args)
end
end
end
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