Class: Regexp::Expression::Sequence
- Inherits:
-
Subexpression
- Object
- Base
- Subexpression
- Regexp::Expression::Sequence
- Defined in:
- lib/regexp_parser/expression/sequence.rb
Overview
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 and Conditional branches.
Direct Known Subclasses
Instance Attribute Summary
Attributes inherited from Subexpression
Attributes inherited from Base
#conditional_level, #level, #options, #quantifier, #set_level, #token, #ts, #type
Instance Method Summary collapse
-
#initialize(level, set_level, conditional_level) ⇒ Sequence
constructor
A new instance of Sequence.
- #quantify(token, text, min = nil, max = nil, mode = :greedy) ⇒ Object
- #starts_at ⇒ Object
- #text ⇒ Object
Methods inherited from Subexpression
#<<, #[], #all?, #clone, #each, #each_expression, #each_with_index, #empty?, #first, #insert, #last, #length, #map, #strfregexp_tree, #te, #to_h, #to_s, #traverse, #ts
Methods inherited from Base
#ascii_classes?, #case_insensitive?, #clone, #coded_offset, #default_classes?, #free_spacing?, #full_length, #greedy?, #is?, #match, #matches?, #multiline?, #offset, #one_of?, #possessive?, #quantified?, #quantity, #reluctant?, #strfregexp, #terminal?, #to_h, #to_re, #to_s, #type?, #unicode_classes?
Constructor Details
#initialize(level, set_level, conditional_level) ⇒ Sequence
Returns a new instance of Sequence.
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# File 'lib/regexp_parser/expression/sequence.rb', line 10 def initialize(level, set_level, conditional_level) super Regexp::Token.new( :expression, :sequence, '', nil, # ts nil, # te level, set_level, conditional_level ) end |
Instance Method Details
#quantify(token, text, min = nil, max = nil, mode = :greedy) ⇒ Object
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# File 'lib/regexp_parser/expression/sequence.rb', line 31 def quantify(token, text, min = nil, max = nil, mode = :greedy) offset = -1 target = expressions[offset] while target and target.is_a?(FreeSpace) target = expressions[offset -= 1] end raise ArgumentError.new("No valid target found for '#{text}' " + "quantifier") unless target target.quantify(token, text, min, max, mode) end |
#starts_at ⇒ Object
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# File 'lib/regexp_parser/expression/sequence.rb', line 27 def starts_at @expressions.first.starts_at end |
#text ⇒ Object
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# File 'lib/regexp_parser/expression/sequence.rb', line 23 def text to_s end |