Module: Regexp::Parser
- Includes:
- Expression, Syntax
- Defined in:
- lib/regexp_parser.rb,
lib/regexp_parser/parser.rb
Defined Under Namespace
Classes: ParserError, UnknownTokenError, UnknownTokenTypeError
Constant Summary collapse
- VERFILE =
File.('../../VERSION.yml', __FILE__)
- VERSION =
YAML.load(File.read(VERFILE)).values.compact.join('.')
Constants included from Syntax
Class Method Summary collapse
- .anchor(token) ⇒ Object
- .append_set(token) ⇒ Object
- .backref(token) ⇒ Object
- .close_group ⇒ Object
- .close_set(token) ⇒ Object
- .escape(token) ⇒ Object
- .group(token) ⇒ Object
- .interval(text) ⇒ Object
- .meta(token) ⇒ Object
- .negate_set ⇒ Object
- .nest(exp) ⇒ Object
- .open_group(token) ⇒ Object
- .open_set(token) ⇒ Object
- .options(token) ⇒ Object
- .parse(input, syntax = "ruby/#{RUBY_VERSION}", &block) ⇒ Object
- .parse_token(token) ⇒ Object
- .property(token) ⇒ Object
- .quantifier(token) ⇒ Object
- .set(token) ⇒ Object
- .type(token) ⇒ Object
Methods included from Syntax
Methods included from Expression
Class Method Details
.anchor(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 245 def self.anchor(token) case token.token when :bol @node << Anchor::BeginningOfLine.new(token) when :eol @node << Anchor::EndOfLine.new(token) when :bos @node << Anchor::BOS.new(token) when :eos @node << Anchor::EOS.new(token) when :eos_ob_eol @node << Anchor::EOSobEOL.new(token) when :word_boundary @node << Anchor::WordBoundary.new(token) when :nonword_boundary @node << Anchor::NonWordBoundary.new(token) when :match_start @node << Anchor::MatchStart.new(token) else raise UnknownTokenError.new('Anchor', token) end end |
.append_set(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 429 def self.append_set(token) @set << token.text end |
.backref(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 120 def self.backref(token) case token.token when :name_ref @node << Backreference::Name.new(token) when :name_nest_ref @node << Backreference::NameNestLevel.new(token) when :name_call @node << Backreference::NameCall.new(token) when :number, :number_ref @node << Backreference::Number.new(token) when :number_rel_ref @node << Backreference::NumberRelative.new(token) when :number_nest_ref @node << Backreference::NumberNestLevel.new(token) when :number_call @node << Backreference::NumberCall.new(token) when :number_rel_call @node << Backreference::NumberCallRelative.new(token) else raise UnknownTokenError.new('Backreference', token) end end |
.close_group ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 408 def self.close_group @nesting.pop @node = @nesting.last @node = @node.last if @node.last and @node.last.is_a?(Alternation) end |
.close_set(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 433 def self.close_set(token) @set.close end |
.escape(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 268 def self.escape(token) case token.token when :backspace @node << EscapeSequence::Backspace.new(token) when :escape @node << EscapeSequence::AsciiEscape.new(token) when :bell @node << EscapeSequence::Bell.new(token) when :form_feed @node << EscapeSequence::FormFeed.new(token) when :newline @node << EscapeSequence::Newline.new(token) when :carriage @node << EscapeSequence::Return.new(token) when :space @node << EscapeSequence::Space.new(token) when :tab @node << EscapeSequence::Tab.new(token) when :vertical_tab @node << EscapeSequence::VerticalTab.new(token) when :control @node << EscapeSequence::Control.new(token) else # treating everything else as a literal @node << EscapeSequence::Literal.new(token) end end |
.group(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 355 def self.group(token) case token.token when :options self.(token) when :close self.close_group when :comment @node << Group::Comment.new(token) else self.open_group(token) end end |
.interval(text) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 340 def self.interval(text) mchr = text[text.length-1].chr =~ /[?+]/ ? text[text.length-1].chr : nil mode = case mchr when '?'; text.chop!; :reluctant when '+'; text.chop!; :possessive else :greedy end range = text.gsub(/\{|\}/, '').split(',', 2).each {|i| i.strip} min = range[0].empty? ? 0 : range[0] max = range[1] ? (range[1].empty? ? -1 : range[1]) : min @node.expressions.last.quantify(:interval, text, min.to_i, max.to_i, mode) end |
.meta(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 90 def self.(token) case token.token when :dot @node << CharacterType::Any.new(token) when :alternation unless @node.token == :alternation unless @node.last.is_a?(Alternation) alt = Alternation.new(token) seq = Sequence.new while @node.expressions.last seq.insert @node.expressions.pop end alt.alternative(seq) @node << alt @node = alt @node.alternative else @node = @node.last @node.alternative end else @node.alternative end else raise UnknownTokenError.new('Meta', token) end end |
.negate_set ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 425 def self.negate_set @set.negate end |
.nest(exp) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 39 def self.nest(exp) @nesting.push exp @node << exp @node = exp end |
.open_group(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 381 def self.open_group(token) case token.token when :passive exp = Group::Passive.new(token) when :atomic exp = Group::Atomic.new(token) when :named exp = Group::Named.new(token) when :capture exp = Group::Capture.new(token) when :lookahead exp = Assertion::Lookahead.new(token) when :nlookahead exp = Assertion::NegativeLookahead.new(token) when :lookbehind exp = Assertion::Lookbehind.new(token) when :nlookbehind exp = Assertion::NegativeLookbehind.new(token) else raise UnknownTokenError.new('Group type open', token) end self.nest exp end |
.open_set(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 415 def self.open_set(token) token.token = :character if token.type == :subset @set << CharacterSubSet.new(token) else @node << (@set = CharacterSet.new(token)) end end |
.options(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 368 def self.(token) opt = token.text.split('-', 2) exp = Group::Options.new(token) exp. = { :m => opt[0].include?('m') ? true : false, :i => opt[0].include?('i') ? true : false, :x => opt[0].include?('x') ? true : false } self.nest exp end |
.parse(input, syntax = "ruby/#{RUBY_VERSION}", &block) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 25 def self.parse(input, syntax = "ruby/#{RUBY_VERSION}", &block) @nesting = [@root = @node = Root.new] Regexp::Lexer.scan(input, syntax) do |token| self.parse_token token end if block_given? block.call @root else @root end end |
.parse_token(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 46 def self.parse_token(token) case token.type when :meta; self.(token) when :quantifier; self.quantifier(token) when :anchor; self.anchor(token) when :escape; self.escape(token) when :group; self.group(token) when :assertion; self.group(token) when :set, :subset; self.set(token) when :type; self.type(token) when :backref; self.backref(token) when :property, :nonproperty self.property(token) when :literal @node << Literal.new(token) else raise UnknownTokenTypeError.new(token.type, token) end end |
.property(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 166 def self.property(token) include Regexp::Expression::UnicodeProperty case token.token when :alnum; @node << Alnum.new(token) when :alpha; @node << Alpha.new(token) when :any; @node << Any.new(token) when :ascii; @node << Ascii.new(token) when :blank; @node << Blank.new(token) when :cntrl; @node << Cntrl.new(token) when :digit; @node << Digit.new(token) when :graph; @node << Graph.new(token) when :lower; @node << Lower.new(token) when :print; @node << Print.new(token) when :punct; @node << Punct.new(token) when :space; @node << Space.new(token) when :upper; @node << Upper.new(token) when :word; @node << Word.new(token) when :xdigit; @node << Xdigit.new(token) when :newline; @node << Newline.new(token) when :letter_any; @node << Letter::Any.new(token) when :letter_uppercase; @node << Letter::Uppercase.new(token) when :letter_lowercase; @node << Letter::Lowercase.new(token) when :letter_titlecase; @node << Letter::Titlecase.new(token) when :letter_modifier; @node << Letter::Modifier.new(token) when :letter_other; @node << Letter::Other.new(token) when :mark_any; @node << Mark::Any.new(token) when :mark_nonspacing; @node << Mark::Nonspacing.new(token) when :mark_spacing; @node << Mark::Spacing.new(token) when :mark_enclosing; @node << Mark::Enclosing.new(token) when :number_any; @node << Number::Any.new(token) when :number_decimal; @node << Number::Decimal.new(token) when :number_letter; @node << Number::Letter.new(token) when :number_other; @node << Number::Other.new(token) when :punct_any; @node << Punctuation::Any.new(token) when :punct_connector; @node << Punctuation::Connector.new(token) when :punct_dash; @node << Punctuation::Dash.new(token) when :punct_open; @node << Punctuation::Open.new(token) when :punct_close; @node << Punctuation::Close.new(token) when :punct_initial; @node << Punctuation::Initial.new(token) when :punct_final; @node << Punctuation::Final.new(token) when :punct_other; @node << Punctuation::Other.new(token) when :separator_any; @node << Separator::Any.new(token) when :separator_space; @node << Separator::Space.new(token) when :separator_line; @node << Separator::Line.new(token) when :separator_para; @node << Separator::Paragraph.new(token) when :symbol_any; @node << Symbol::Any.new(token) when :symbol_math; @node << Symbol::Math.new(token) when :symbol_currency; @node << Symbol::Currency.new(token) when :symbol_modifier; @node << Symbol::Modifier.new(token) when :symbol_other; @node << Symbol::Other.new(token) when :other; @node << Codepoint::Any.new(token) when :control; @node << Codepoint::Control.new(token) when :format; @node << Codepoint::Format.new(token) when :surrogate; @node << Codepoint::Surrogate.new(token) when :private_use; @node << Codepoint::PrivateUse.new(token) when :unassigned; @node << Codepoint::Unassigned.new(token) when *Token::UnicodeProperty::Age @node << Age.new(token) when *Token::UnicodeProperty::Derived @node << Derived.new(token) when *Regexp::Syntax::Token::UnicodeProperty::Script @node << Script.new(token) else raise UnknownTokenError.new('UnicodeProperty', token) end end |
.quantifier(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 300 def self.quantifier(token) unless @node.expressions.last if token.token == :zero_or_one raise "Quantifier given without a target, or the syntax of the group " + "or its options is incorrect" else raise "Quantifier `#{token.text}' given without a target" end end case token.token when :zero_or_one @node.expressions.last.quantify(:zero_or_one, token.text, 0, 1, :greedy) when :zero_or_one_reluctant @node.expressions.last.quantify(:zero_or_one, token.text, 0, 1, :reluctant) when :zero_or_one_possessive @node.expressions.last.quantify(:zero_or_one, token.text, 0, 1, :possessive) when :zero_or_more @node.expressions.last.quantify(:zero_or_more, token.text, 0, -1, :greedy) when :zero_or_more_reluctant @node.expressions.last.quantify(:zero_or_more, token.text, 0, -1, :reluctant) when :zero_or_more_possessive @node.expressions.last.quantify(:zero_or_more, token.text, 0, -1, :possessive) when :one_or_more @node.expressions.last.quantify(:one_or_more, token.text, 1, -1, :greedy) when :one_or_more_reluctant @node.expressions.last.quantify(:one_or_more, token.text, 1, -1, :reluctant) when :one_or_more_possessive @node.expressions.last.quantify(:one_or_more, token.text, 1, -1, :possessive) when :interval self.interval(token.text) else raise UnknownTokenError.new('Quantifier', token) end end |
.set(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 69 def self.set(token) case token.token when :open self.open_set(token) when :close self.close_set(token) when :negate self.negate_set when :member, :range, :escape, :collation, :equivalent self.append_set(token) when *Token::Escape::All self.append_set(token) when *Token::CharacterSet::All self.append_set(token) when *Token::UnicodeProperty::All self.append_set(token) else raise UnknownTokenError.new('CharacterSet', token) end end |
.type(token) ⇒ Object
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# File 'lib/regexp_parser/parser.rb', line 143 def self.type(token) case token.token when :digit @node << CharacterType::Digit.new(token) when :nondigit @node << CharacterType::NonDigit.new(token) when :hex @node << CharacterType::Hex.new(token) when :nonhex @node << CharacterType::NonHex.new(token) when :space @node << CharacterType::Space.new(token) when :nonspace @node << CharacterType::NonSpace.new(token) when :word @node << CharacterType::Word.new(token) when :nonword @node << CharacterType::NonWord.new(token) else raise UnknownTokenError.new('CharacterType', token) end end |