Class: Treetop::Runtime::CompiledParser

Inherits:
Object
  • Object
show all
Includes:
Treetop::Runtime
Defined in:
lib/treetop/runtime/compiled_parser.rb

Direct Known Subclasses

Compiler::MetagrammarParser

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CompiledParser

Returns a new instance of CompiledParser.



11
12
13
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 11

def initialize
  self.consume_all_input = true
end

Instance Attribute Details

#consume_all_input ⇒ Object Also known as: consume_all_input?

Returns the value of attribute consume_all_input.



8
9
10
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 8

def consume_all_input
  @consume_all_input
end

#index ⇒ Object

Returns the value of attribute index.



6
7
8
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 6

def index
  @index
end

#input ⇒ Object (readonly)

Returns the value of attribute input.



6
7
8
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 6

def input
  @input
end

#max_terminal_failure_index ⇒ Object (readonly)

Returns the value of attribute max_terminal_failure_index.



6
7
8
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 6

def max_terminal_failure_index
  @max_terminal_failure_index
end

#root=(value) ⇒ Object (writeonly)

Sets the attribute root

Parameters:

  • value —

    the value to set the attribute root to.



7
8
9
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 7

def root=(value)
  @root = value
end

Instance Method Details

#failure_column ⇒ Object 



32
33
34
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 32

def failure_column
  @terminal_failures && input.column_of(failure_index)
end

#failure_index ⇒ Object 



24
25
26
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 24

def failure_index
  max_terminal_failure_index
end

#failure_line ⇒ Object 



28
29
30
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 28

def failure_line
  @terminal_failures && input.line_of(failure_index)
end

#failure_reason ⇒ Object 



36
37
38
39
40
41
42
43
44
45
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 36

def failure_reason
  return nil unless (tf = terminal_failures) && tf.size > 0
  "Expected " +
    (tf.size == 1 ?
     tf[0].expected_string :
           "one of #{tf.map{|f| f.expected_string}.uniq*', '}"
    ) +
          " at line #{failure_line}, column #{failure_column} (byte #{failure_index+1})" +
          " after #{input[index...failure_index]}"
end

#parse(input, options = {}) ⇒ Object 



15
16
17
18
19
20
21
22
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 15

def parse(input, options = {})
  prepare_to_parse(input)
  @index = options[:index] if options[:index]
  result = send("_nt_#{root}")
  return nil if (consume_all_input? && index != input.size)
  return SyntaxNode.new(input, index...(index + 1)) if result == true
  return result
end

#terminal_failures ⇒ Object 



47
48
49
50
51
52
53
 
# File 'lib/treetop/runtime/compiled_parser.rb', line 47

def terminal_failures
  if @terminal_failures.empty? || @terminal_failures[0].is_a?(TerminalParseFailure)
    @terminal_failures
  else
    @terminal_failures.map! {|tf_ary| TerminalParseFailure.new(*tf_ary) }
  end
end