class LexicalAnalyzer

The RCTP class for lexical analysis.

Constants

VERSION

Attributes

rules[R]

text[R]

Public Class Methods

new(text: "", rules: []) click to toggle source

Set things up.

# File lib/lexical_analyzer.rb, line 13
def initialize(text: "", rules: [])
  @text  = text
  @rules = rules
end

Public Instance Methods

get(extra=nil) click to toggle source

Get the next lexical token

# File lib/lexical_analyzer.rb, line 26
def get(extra=nil)
  (extra ? rules + extra : rules).each do |rule|
    if match_data = rule.match(text)
      @text = match_data.post_match
      return rule.call(match_data.to_s) || get
    end
  end

  false
end

renew(text: @text, rules: @rules) click to toggle source

Reuse an existing lexical analyzer.

# File lib/lexical_analyzer.rb, line 19
def renew(text: @text, rules: @rules)
  @text  = text
  @rules = rules
  self
end