Class: Keisan::Parser
- Inherits:
-
Object
- Object
- Keisan::Parser
- Defined in:
- lib/keisan/parser.rb
Constant Summary collapse
- KEYWORDS =
%w(let puts break continue).freeze
Instance Attribute Summary collapse
-
#components ⇒ Object
readonly
Returns the value of attribute components.
-
#tokens ⇒ Object
readonly
Returns the value of attribute tokens.
Instance Method Summary collapse
- #ast ⇒ Object
-
#initialize(string: nil, tokens: nil) ⇒ Parser
constructor
A new instance of Parser.
Constructor Details
#initialize(string: nil, tokens: nil) ⇒ Parser
Returns a new instance of Parser.
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 |
# File 'lib/keisan/parser.rb', line 7 def initialize(string: nil, tokens: nil) if string.nil? && tokens.nil? raise Exceptions::InternalError.new("Invalid arguments") end if !string.nil? @tokens = Tokenizer.new(string).tokens else raise Exceptions::InternalError.new("Invalid argument: tokens = #{tokens}") if tokens.nil? || !tokens.is_a?(Array) @tokens = tokens end @components = [] if multi_line? parse_multi_line! elsif @tokens.first&.is_a?(Tokens::Word) && KEYWORDS.include?(@tokens.first.string) parse_keyword! else parse_components! remove_unary_identity! end end |
Instance Attribute Details
#components ⇒ Object (readonly)
Returns the value of attribute components.
5 6 7 |
# File 'lib/keisan/parser.rb', line 5 def components @components end |
#tokens ⇒ Object (readonly)
Returns the value of attribute tokens.
5 6 7 |
# File 'lib/keisan/parser.rb', line 5 def tokens @tokens end |