Class: Cyclotone::MiniNotation::Parser

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

Defined Under Namespace

Classes: Token

Constant Summary collapse

SINGLE_CHAR_TOKENS = 
{
  "[" => :lbracket,
  "]" => :rbracket,
  "{" => :lbrace,
  "}" => :rbrace,
  "(" => :lparen,
  ")" => :rparen,
  "," => :comma,
  "." => :dot,
  "~" => :tilde,
  "*" => :star,
  "/" => :slash,
  "!" => :bang,
  "_" => :underscore,
  "@" => :at,
  "?" => :question,
  "|" => :pipe,
  ":" => :colon,
  "%" => :percent
}.freeze

Instance Method Summary collapse

Instance Method Details

#parse(input) ⇒ Object

Raises:



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# File 'lib/cyclotone/mini_notation/parser.rb', line 29

def parse(input)
  @source = input.to_s
  @tokens = tokenize(@source)
  @index = 0

  skip_spaces
  raise ParseError.new("input is empty", line: 1, column: 1, source: @source) if current.type == :eof

  ast = parse_stack(terminators: [:eof])
  skip_spaces
  expect(:eof)
  ast
end