Class: L43Rmap::Parsing::RgxParser

Inherits:
Object
  • Object
show all
Defined in:
lib/l43_rmap/parsing/rgx_parser.rb

Constant Summary collapse

BadRgx = 
Class.new(RuntimeError)

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#blk ⇒ Object (readonly)

Returns the value of attribute blk.



14
15
16
 
# File 'lib/l43_rmap/parsing/rgx_parser.rb', line 14

def blk
  @blk
end

#only_group ⇒ Object (readonly)

Returns the value of attribute only_group.



14
15
16
 
# File 'lib/l43_rmap/parsing/rgx_parser.rb', line 14

def only_group
  @only_group
end

#rgx ⇒ Object (readonly)

Returns the value of attribute rgx.



14
15
16
 
# File 'lib/l43_rmap/parsing/rgx_parser.rb', line 14

def rgx
  @rgx
end

Instance Method Details

#parse(input) ⇒ Object 



16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'lib/l43_rmap/parsing/rgx_parser.rb', line 16

def parse(input)
  match = rgx.match(input.current)
  # p(rgx:, input:, match:) if ENV['DEBUG']
  # p(match:) if match
  case match
  in nil
    nil
  in [m]
    ParseState.new(ast: postprocess(m), input: advance(input, m, m))
  in [m, a]
    ParseState.new(ast: postprocess(a), input: advance(input, a, m))
  in [_, *rest]
    raise BadRgx, "too many captures; max = 1, had #{rest.count}"
  end
end