Class: Fluent::Config::BasicParser

Inherits:
Object
  • Object
show all
Extended by:
ClassMethods
Defined in:
lib/fluent/config/basic_parser.rb

Direct Known Subclasses

LiteralParser

Defined Under Namespace

Modules: ClassMethods

Constant Summary collapse

LINE_END = 
/(?:[ \t]*(?:\#.*)?(?:\z|[\r\n]))+/
SPACING = 
/(?:[ \t\r\n]|\z|\#.*?(?:\z|[\r\n]))+/
ZERO_OR_MORE_SPACING = 
/(?:[ \t\r\n]|\z|\#.*?(?:\z|[\r\n]))*/
SPACING_WITHOUT_COMMENT = 
/(?:[ \t\r\n]|\z)+/
LINE_END_WITHOUT_SPACING_AND_COMMENT = 
/(?:\z|[\r\n])/

Instance Method Summary collapse

Methods included from ClassMethods

def_literal, def_symbol, symbol

Constructor Details

#initialize(strscan) ⇒ BasicParser

Returns a new instance of BasicParser.



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# File 'lib/fluent/config/basic_parser.rb', line 23

def initialize(strscan)
  @ss = strscan
end

Instance Method Details

#check(pattern) ⇒ Object 



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# File 'lib/fluent/config/basic_parser.rb', line 75

def check(pattern)
  @ss.check(pattern)
end

#eof? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/config/basic_parser.rb', line 67

def eof?
  @ss.eos?
end

#error_sample ⇒ Object 



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# File 'lib/fluent/config/basic_parser.rb', line 95

def error_sample
  pos = @ss.pos

  lines = @ss.string.lines.to_a
  lines.each_with_index { |line, ln|
    if line.size >= pos
      msgs = ["line #{ln + 1},#{pos}\n"]

      if ln > 0
        last_line = lines[ln - 1]
        msgs << "%3s: %s" % [ln, last_line]
      end

      msgs << "%3s: %s" % [ln + 1, line]
      msgs << "\n     #{'-' * pos}^\n"

      if next_line = lines[ln + 1]
        msgs << "%3s: %s" % [ln + 2, next_line]
      end

      return msgs.join
    end
    pos -= line.size
    last_line = line
  }
end

#getch ⇒ Object 



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# File 'lib/fluent/config/basic_parser.rb', line 63

def getch
  @ss.getch
end

#line_end ⇒ Object 



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# File 'lib/fluent/config/basic_parser.rb', line 79

def line_end
  skip(LINE_END)
end

#parse_error!(message) ⇒ Object

Raises:



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# File 'lib/fluent/config/basic_parser.rb', line 91

def parse_error!(message)
  raise ConfigParseError, "#{message} at #{error_sample}"
end

#prev_match ⇒ Object 



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# File 'lib/fluent/config/basic_parser.rb', line 71

def prev_match
  @ss[0]
end

#scan(pattern) ⇒ Object 



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# File 'lib/fluent/config/basic_parser.rb', line 59

def scan(pattern)
  @ss.scan(pattern)
end

#skip(pattern) ⇒ Object 



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# File 'lib/fluent/config/basic_parser.rb', line 55

def skip(pattern)
  @ss.skip(pattern)
end

#spacing ⇒ Object 



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# File 'lib/fluent/config/basic_parser.rb', line 83

def spacing
  skip(SPACING)
end

#spacing_without_comment ⇒ Object 



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# File 'lib/fluent/config/basic_parser.rb', line 87

def spacing_without_comment
  skip(SPACING_WITHOUT_COMMENT)
end