class Regexp::Syntax::Base
A lookup map of supported types and tokens in a given syntax
Public Class Methods
inspect()
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# File lib/regexp_parser/syntax/base.rb, line 91 def self.inspect "#{super} (feature set of #{ancestors[1].to_s.split('::').last})" end
new()
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# File lib/regexp_parser/syntax/base.rb, line 14 def initialize @implements = {} implements Token::Literal::Type, Token::Literal::All implements Token::FreeSpace::Type, Token::FreeSpace::All end
Public Instance Methods
excludes(type, tokens)
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# File lib/regexp_parser/syntax/base.rb, line 33 def excludes(type, tokens) implementations(type).subtract(Array(tokens)) end
features()
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# File lib/regexp_parser/syntax/base.rb, line 21 def features @implements end
implementations(type)
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# File lib/regexp_parser/syntax/base.rb, line 25 def implementations(type) @implements[type] ||= Set.new end
implements(type, tokens)
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# File lib/regexp_parser/syntax/base.rb, line 29 def implements(type, tokens) implementations(type).merge(Array(tokens)) end
implements!(type, token)
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# File lib/regexp_parser/syntax/base.rb, line 42 def implements!(type, token) raise NotImplementedError.new(self, type, token) unless implements?(type, token) end
Also aliased as: check!
implements?(type, token)
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# File lib/regexp_parser/syntax/base.rb, line 37 def implements?(type, token) implementations(type).include?(token) end
Also aliased as: check?
normalize(type, token)
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# File lib/regexp_parser/syntax/base.rb, line 48 def normalize(type, token) case type when :group normalize_group(type, token) when :backref normalize_backref(type, token) else [type, token] end end
normalize_backref(type, token)
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# File lib/regexp_parser/syntax/base.rb, line 68 def normalize_backref(type, token) case token when :name_ref_ab, :name_ref_sq [:backref, :name_ref] when :name_call_ab, :name_call_sq [:backref, :name_call] when :name_recursion_ref_ab, :name_recursion_ref_sq [:backref, :name_recursion_ref] when :number_ref_ab, :number_ref_sq [:backref, :number_ref] when :number_call_ab, :number_call_sq [:backref, :number_call] when :number_rel_ref_ab, :number_rel_ref_sq [:backref, :number_rel_ref] when :number_rel_call_ab, :number_rel_call_sq [:backref, :number_rel_call] when :number_recursion_ref_ab, :number_recursion_ref_sq [:backref, :number_recursion_ref] else [type, token] end end
normalize_group(type, token)
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# File lib/regexp_parser/syntax/base.rb, line 59 def normalize_group(type, token) case token when :named_ab, :named_sq [:group, :named] else [type, token] end end