comparison vendor/gems/coderay-0.9.7/lib/coderay/scanners/ruby/patterns.rb @ 524:1248a47e81b3 feature_36

Merge from branch "luisf"

+# encoding: utf-8
+module CodeRay
+module Scanners
+
+  module Ruby::Patterns  # :nodoc:
+
+    RESERVED_WORDS = %w[
+      and def end in or unless begin
+      defined? ensure module redo super until
+      BEGIN break do next rescue then
+      when END case else for retry
+      while alias class elsif if not return
+      undef yield
+    ]
+
+    DEF_KEYWORDS = %w[ def ]
+    UNDEF_KEYWORDS = %w[ undef ]
+    ALIAS_KEYWORDS = %w[ alias ]
+    MODULE_KEYWORDS = %w[ class module ]
+    DEF_NEW_STATE = WordList.new(:initial).
+      add(DEF_KEYWORDS, :def_expected).
+      add(UNDEF_KEYWORDS, :undef_expected).
+      add(ALIAS_KEYWORDS, :alias_expected).
+      add(MODULE_KEYWORDS, :module_expected)
+
+    PREDEFINED_CONSTANTS = %w[
+      nil true false self
+      DATA ARGV ARGF
+      __FILE__ __LINE__ __ENCODING__
+    ]
+
+    IDENT_KIND = WordList.new(:ident).
+      add(RESERVED_WORDS, :reserved).
+      add(PREDEFINED_CONSTANTS, :pre_constant)
+
+    if /\w/u === '∑'
+      # MRI 1.8.6, 1.8.7
+      IDENT = /[^\W\d]\w*/
+    else
+      if //.respond_to? :encoding
+        # MRI 1.9.1, 1.9.2
+        IDENT = Regexp.new '[\p{L}\p{M}\p{Pc}\p{Sm}&&[^\x00-\x40\x5b-\x5e\x60\x7b-\x7f]][\p{L}\p{M}\p{N}\p{Pc}\p{Sm}&&[^\x00-\x2f\x3a-\x40\x5b-\x5e\x60\x7b-\x7f]]*'
+      else
+        # JRuby, Rubinius
+        IDENT = /[^\x00-\x40\x5b-\x5e\x60\x7b-\x7f][^\x00-\x2f\x3a-\x40\x5b-\x5e\x60\x7b-\x7f]*/
+      end
+    end
+
+    METHOD_NAME = / #{IDENT} [?!]? /ox
+    METHOD_NAME_OPERATOR = /
+      \*\*?           # multiplication and power
+      | [-+~]@?       # plus, minus, tilde with and without at sign
+      | [\/%&|^`]     # division, modulo or format strings, and, or, xor, system
+      | \[\]=?        # array getter and setter
+      | << | >>       # append or shift left, shift right
+      | <=?>? | >=?   # comparison, rocket operator
+      | ===? | =~     # simple equality, case equality, match
+      | ![~=@]?       # negation with and without at sign, not-equal and not-match
+    /ox
+    METHOD_NAME_EX = / #{IDENT} (?:[?!]|=(?!>))? | #{METHOD_NAME_OPERATOR} /ox
+    INSTANCE_VARIABLE = / @ #{IDENT} /ox
+    CLASS_VARIABLE = / @@ #{IDENT} /ox
+    OBJECT_VARIABLE = / @@? #{IDENT} /ox
+    GLOBAL_VARIABLE = / \$ (?: #{IDENT} | [1-9]\d* | 0\w* | [~&+`'=\/,;_.<>!@$?*":\\] | -[a-zA-Z_0-9] ) /ox
+    PREFIX_VARIABLE = / #{GLOBAL_VARIABLE} | #{OBJECT_VARIABLE} /ox
+    VARIABLE = / @?@? #{IDENT} | #{GLOBAL_VARIABLE} /ox
+
+    QUOTE_TO_TYPE = {
+      '`' => :shell,
+      '/'=> :regexp,
+    }
+    QUOTE_TO_TYPE.default = :string
+
+    REGEXP_MODIFIERS = /[mixounse]*/
+    REGEXP_SYMBOLS = /[|?*+(){}\[\].^$]/
+
+    DECIMAL = /\d+(?:_\d+)*/
+    OCTAL = /0_?[0-7]+(?:_[0-7]+)*/
+    HEXADECIMAL = /0x[0-9A-Fa-f]+(?:_[0-9A-Fa-f]+)*/
+    BINARY = /0b[01]+(?:_[01]+)*/
+
+    EXPONENT = / [eE] [+-]? #{DECIMAL} /ox
+    FLOAT_SUFFIX = / #{EXPONENT} | \. #{DECIMAL} #{EXPONENT}? /ox
+    FLOAT_OR_INT = / #{DECIMAL} (?: #{FLOAT_SUFFIX} () )? /ox
+    NUMERIC = / (?: (?=0) (?: #{OCTAL} | #{HEXADECIMAL} | #{BINARY} ) | #{FLOAT_OR_INT} ) /ox
+
+    SYMBOL = /
+      :
+      (?:
+        #{METHOD_NAME_EX}
+      | #{PREFIX_VARIABLE}
+      | ['"]
+      )
+    /ox
+    METHOD_NAME_OR_SYMBOL = / #{METHOD_NAME_EX} | #{SYMBOL} /ox
+
+    SIMPLE_ESCAPE = /
+        [abefnrstv]
+      |  [0-7]{1,3}
+      | x[0-9A-Fa-f]{1,2}
+      | .?
+    /mx
+    
+    CONTROL_META_ESCAPE = /
+      (?: M-|C-|c )
+      (?: \\ (?: M-|C-|c ) )*
+      (?: [^\\] | \\ #{SIMPLE_ESCAPE} )?
+    /mox
+    
+    ESCAPE = /
+      #{CONTROL_META_ESCAPE} | #{SIMPLE_ESCAPE}
+    /mox
+    
+    CHARACTER = /
+      \?
+      (?:
+        [^\s\\]
+      | \\ #{ESCAPE}
+      )
+    /mox
+
+    # NOTE: This is not completely correct, but
+    # nobody needs heredoc delimiters ending with \n.
+    # Also, delimiters starting with numbers are allowed.
+    # but they are more often than not a false positive.
+    HEREDOC_OPEN = /
+      << (-)?              # $1 = float
+      (?:
+        ( #{IDENT} )       # $2 = delim
+      |
+        ( ["'`\/] )        # $3 = quote, type
+        ( [^\n]*? ) \3     # $4 = delim
+      )
+    /mx
+
+    RUBYDOC = /
+      =begin (?!\S)
+      .*?
+      (?: \Z | ^=end (?!\S) [^\n]* )
+    /mx
+
+    DATA = /
+      __END__$
+      .*?
+      (?: \Z | (?=^\#CODE) )
+    /mx
+    
+    # Checks for a valid value to follow. This enables
+    # value_expected in method calls without parentheses.
+    VALUE_FOLLOWS = /
+      (?>[ \t\f\v]+)
+      (?:
+        [%\/][^\s=]
+      | <<-?\S
+      | [-+] \d
+      | #{CHARACTER}
+      )
+    /x
+    KEYWORDS_EXPECTING_VALUE = WordList.new.add(%w[
+      and end in or unless begin
+      defined? ensure redo super until
+      break do next rescue then
+      when case else for retry
+      while elsif if not return
+      yield
+    ])
+
+    RUBYDOC_OR_DATA = / #{RUBYDOC} | #{DATA} /xo
+
+    RDOC_DATA_START = / ^=begin (?!\S) | ^__END__$ /x
+
+    FANCY_START_CORRECT = / % ( [qQwWxsr] | (?![a-zA-Z0-9]) ) ([^a-zA-Z0-9]) /mx
+
+    FancyStringType = {
+      'q' => [:string, false],
+      'Q' => [:string, true],
+      'r' => [:regexp, true],
+      's' => [:symbol, false],
+      'x' => [:shell, true]
+    }
+    FancyStringType['w'] = FancyStringType['q']
+    FancyStringType['W'] = FancyStringType[''] = FancyStringType['Q']
+
+    class StringState < Struct.new :type, :interpreted, :delim, :heredoc,
+      :paren, :paren_depth, :pattern, :next_state
+
+      CLOSING_PAREN = Hash[ *%w[
+        ( )
+        [ ]
+        < >
+        { }
+      ] ]
+
+      CLOSING_PAREN.each { |k,v| k.freeze; v.freeze }  # debug, if I try to change it with <<
+      OPENING_PAREN = CLOSING_PAREN.invert
+
+      STRING_PATTERN = Hash.new do |h, k|
+        delim, interpreted = *k
+        delim_pattern = Regexp.escape(delim.dup)  # dup: workaround for old Ruby
+        if closing_paren = CLOSING_PAREN[delim]
+          delim_pattern = delim_pattern[0..-1] if defined? JRUBY_VERSION  # JRuby fix
+          delim_pattern << Regexp.escape(closing_paren)
+        end
+        delim_pattern << '\\\\' unless delim == '\\'
+        
+        special_escapes =
+          case interpreted
+          when :regexp_symbols
+            '| ' + REGEXP_SYMBOLS.source
+          when :words
+            '| \s'
+          end
+        
+        h[k] =
+          if interpreted and not delim == '#'
+            / (?= [#{delim_pattern}] | \# [{$@] #{special_escapes} ) /mx
+          else
+            / (?= [#{delim_pattern}] #{special_escapes} ) /mx
+          end
+      end
+
+      HEREDOC_PATTERN = Hash.new do |h, k|
+        delim, interpreted, indented = *k
+        delim_pattern = Regexp.escape(delim.dup)  # dup: workaround for old Ruby
+        delim_pattern = / \n #{ '(?>[\ \t]*)' if indented } #{ Regexp.new delim_pattern } $ /x
+        h[k] =
+          if interpreted
+            / (?= #{delim_pattern}() | \\ | \# [{$@] ) /mx  # $1 set == end of heredoc
+          else
+            / (?= #{delim_pattern}() | \\ ) /mx
+          end
+      end
+
+      def initialize kind, interpreted, delim, heredoc = false
+        if heredoc
+          pattern = HEREDOC_PATTERN[ [delim, interpreted, heredoc == :indented] ]
+          delim = nil
+        else
+          pattern = STRING_PATTERN[ [delim, interpreted] ]
+          if paren = CLOSING_PAREN[delim]
+            delim, paren = paren, delim
+            paren_depth = 1
+          end
+        end
+        super kind, interpreted, delim, heredoc, paren, paren_depth, pattern, :initial
+      end
+    end unless defined? StringState
+
+  end
+
+end
+end