Class | Haml::Helpers::ErrorReturn |
In: |
lib/haml/helpers.rb
|
Parent: | Object |
An object that raises an error when \{to_s} is called. It‘s used to raise an error when the return value of a helper is used when it shouldn‘t be.
@param message [String] The error message to raise when \{to_s} is called
# File lib/haml/helpers.rb, line 17 17: def initialize(method) 18: @message = "\#{method} outputs directly to the Haml template.\nDisregard its return value and use the - operator,\nor use capture_haml to get the value as a String.\n" 19: end
@return [String] A human-readable string representation
# File lib/haml/helpers.rb, line 49 49: def inspect 50: "Haml::Helpers::ErrorReturn(#{@message.inspect})" 51: end
Raises an error.
@raise [Haml::Error] The error
# File lib/haml/helpers.rb, line 29 29: def to_s 30: raise Haml::Error.new(@message) 31: rescue Haml::Error => e 32: e.backtrace.shift 33: 34: # If the ErrorReturn is used directly in the template, 35: # we don't want Haml's stuff to get into the backtrace, 36: # so we get rid of the format_script line. 37: # 38: # We also have to subtract one from the Haml line number 39: # since the value is passed to format_script the line after 40: # it's actually used. 41: if e.backtrace.first =~ /^\(eval\):\d+:in `format_script/ 42: e.backtrace.shift 43: e.backtrace.first.gsub!(/^\(haml\):(\d+)/) {|s| "(haml):#{$1.to_i - 1}"} 44: end 45: raise e 46: end