Exception: EBNF::LL1::Parser::Error

Inherits:
StandardError
  • Object
show all
Defined in:
lib/ebnf/ll1/parser.rb

Overview

Raised for errors during parsing.

Examples:

Raising a parser error

raise Error.new(
  "invalid token '%' on line 10",
  token: '%', lineno: 9, production: :turtleDoc)

See Also:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(message, options = {}) ⇒ Error

Initializes a new lexer error instance.

Parameters:

  • message (String, #to_s)
  • options (Hash{Symbol => Object}) (defaults to: {})

Options Hash (options):

  • :production (Symbol) — default: nil
  • :token (String) — default: nil
  • :lineno (Integer) — default: nil 


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# File 'lib/ebnf/ll1/parser.rb', line 754

def initialize(message, options = {})
  @production = options[:production]
  @token      = options[:token]
  @lineno     = options[:lineno] || (@token.lineno if @token.respond_to?(:lineno))
  super(message.to_s)
end

Instance Attribute Details

#lineno ⇒ Integer (readonly)

The line number where the error occurred.

Returns:

  • (Integer) 


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# File 'lib/ebnf/ll1/parser.rb', line 744

def lineno
  @lineno
end

#production ⇒ Symbol (readonly)

The current production.

Returns:

  • (Symbol) 


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# File 'lib/ebnf/ll1/parser.rb', line 732

def production
  @production
end

#token ⇒ String (readonly)

The invalid token which triggered the error.

Returns:

  • (String) 


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# File 'lib/ebnf/ll1/parser.rb', line 738

def token
  @token
end