Class: MiniRuby::Parser

Inherits:

Object

• Object
• MiniRuby::Parser

Extended by:

T::Sig

Defined in:

lib/miniruby/parser.rb

Overview

MiniRuby parser

Defined Under Namespace

Classes: Result

Class Method Summary

• .parse(source) ⇒ Object

  : (String source) -> Result.

Instance Method Summary

• #initialize(source) ⇒ Parser constructor

  : (String source) -> void.

• #parse ⇒ Object

  : -> Result.

Constructor Details

#initialize(source) ⇒ Parser

: (String source) -> void

# File 'lib/miniruby/parser.rb', line 23

def initialize(source)
  # Lexer/Tokenizer that produces tokens
  @lexer = Lexer.new(source) #: Lexer
  # Next token used for predicting productions
  @lookahead = Token.new(Token::NONE, Span::ZERO) #: Token
  @errors = [] #: Array[String]
end

Class Method Details

.parse(source) ⇒ Object

: (String source) -> Result

# File 'lib/miniruby/parser.rb', line 15

def parse(source)
  new(source).parse
end

Instance Method Details

#parse ⇒ Object

: -> Result

# File 'lib/miniruby/parser.rb', line 32

def parse
  advance # populate @lookahead
  ast = parse_program
  Result.new(ast, @errors)
end