Class: LyambdaGem::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/lyambda_gem/parser.rb

Instance Method Summary collapse

Constructor Details

#initialize(input) ⇒ Parser

Returns a new instance of Parser.



6
7
8
9
10
 
# File 'lib/lyambda_gem/parser.rb', line 6

def initialize(input)
  @tokens = input.gsub('λ', '\\')  # унифицируем
                 .scan(/[()\\\.]|[^\s()\\\.]+/)
  @pos = 0
end

Instance Method Details

#parse ⇒ Object 



12
13
14
15
16
17
18
19
20
 
# File 'lib/lyambda_gem/parser.rb', line 12

def parse
  term = parse_expression
  raise ParseError, "Unexpected tokens after end: #{@tokens[@pos..].join(' ')}" unless @pos == @tokens.size
  term
  rescue ParseError => e
  raise e
  rescue => e
  raise ParseError, "Invalid syntax: #{e.message}"
end