Class: Jansson::FFI::Error Private

Inherits:
FFI::Struct
  • Object
show all
Defined in:
lib/jansson/ffi.rb,
lib/jansson/ffi/ext/error.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Instance Method Summary collapse

Instance Method Details

#description(source_string) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/jansson/ffi/ext/error.rb', line 6

def description(source_string)
  row = self[:line]
  col = self[:column]
  msg = self[:text].to_s
  
  source = source_string.each_line.to_a[row - 1].strip
  arrow  = ' ' * (col - 1) + '^'
  
  if source.length > 40
    if col >= 20
      source = '... ' + source.slice(col - 20, 40) + ' ...'
      arrow  = '    ' + arrow .slice(col - 20, 40)
    else
      source = source.slice(0, 40) + ' ...'
      arrow  = arrow .slice(0, 40)
    end
  end
  
  "near line: #{row}, column: #{col}: #{msg}\n#{source}\n#{arrow}"
end