Class: NexusParser::Tokens::RowVec

Inherits:
Token
  • Object
show all
Defined in:
lib/nexus_parser/tokens.rb

Instance Attribute Summary

Attributes inherited from Token

#value

Instance Method Summary collapse

Constructor Details

#initialize(str) ⇒ RowVec

Returns a new instance of RowVec.

Raises:



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# File 'lib/nexus_parser/tokens.rb', line 133

def initialize(str)
  # We ignore commas outside (and inside) of groupings, it's fine.
  str.gsub!(/[\, \t]/, '')

  groupers = ['(', ')', '{', '}']
  openers = ['(', '{']
  closers = [')', '}']
  closer_for = { '(' => ')', '{' => '}' }

  a = []
  group = nil
  group_closer = nil
  str.each_char { |c|
    if groupers.include? c
      if ((openers.include?(c) && !group.nil?) ||
        (closers.include?(c) && (group.nil? || c != group_closer)))
        raise(NexusParser::ParseError,
          "Mismatched grouping in matrix row '#{str}'")
      end

      if openers.include? c
        group = []
        group_closer = closer_for[c]
      else # c is a closer
        if group.count == 1
          a << group.first
        elsif group.count > 1
          a << group
        end
        group = nil
        group_closer = nil
      end
    else
      if group.nil?
        a << c
      else
        group << c
      end
    end
  }

  raise(NexusParser::ParseError,
    "Unclosed grouping in matrix row '#{str}'") if !group.nil?

  @value = a
end