Class: StyleScript::ParseError

Inherits:
Racc::ParseError
  • Object
show all
Defined in:
lib/style_script/parse_error.rb

Overview

Racc will raise this Exception whenever a syntax error occurs. The main benefit over the Racc::ParseError is that the StyleScript::ParseError is line-number aware.

Constant Summary collapse

TOKEN_MAP = 
{
  'INDENT'  => 'indent',
  'OUTDENT' => 'outdent',
  "\n"      => 'newline'
}

Instance Method Summary collapse

Constructor Details

#initialize(token_id, value, stack = nil, message = nil) ⇒ ParseError

Returns a new instance of ParseError.



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# File 'lib/style_script/parse_error.rb', line 14

def initialize(token_id, value, stack=nil, message=nil)
  @token_id, @value, @stack, @message = token_id, value, stack, message
end

Instance Method Details

#message ⇒ Object Also known as: inspect 



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# File 'lib/style_script/parse_error.rb', line 18

def message
  line      = @value.respond_to?(:line) ? @value.line : "END"
  line_part = "line #{line}:"
  id_part   = @token_id != @value.to_s ? " unexpected #{@token_id.to_s.downcase}" : ""
  val_part  = @message || "for #{TOKEN_MAP[@value.to_s] || "'#{@value}'"}"
  "#{line_part} syntax error, #{val_part}#{id_part}"
end