Class: Omnium::Parser::Core

Inherits:
Object
  • Object
show all
Includes:
Common, AST, ParseErrorHandler
Defined in:
lib/omnium/parser/core.rb

Overview

The parser will verify the format of a list of tokens (syntax analysis) by ‘recursive-descent’.

Constant Summary

Constants included from Common

Common::NIL_VALUE_TOKENS, Common::PARAMETERISED_TOKENS, Common::RESERVED_KEYWORDS, Common::TOKENS, Common::VALUE_BASED_TOKENS

Instance Method Summary collapse

Methods included from ParseErrorHandler

#error

Methods included from Common

define_token_predicate_method, define_token_type_method, token_entity

Constructor Details

#initialize(lexer) ⇒ Core

Returns a new instance of Core.



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# File 'lib/omnium/parser/core.rb', line 12

def initialize(lexer)
  @lexer = lexer
  @token = nil
  @consumed_token = nil
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/omnium/parser/core.rb', line 18

def parse
  @token = @lexer.next_token
  node = program

  error(expected_type: eof_token, actual_type: @token.type) unless eof?

  node
end