Class: GirFFI::Builders::CallbackArgumentBuilder

Inherits:
BaseArgumentBuilder show all
Defined in:
lib/gir_ffi/builders/callback_argument_builder.rb

Overview

Convertor for arguments for ruby callbacks. Used when building the argument mapper for callbacks.

Direct Known Subclasses

ClosureArgumentBuilder, VFuncArgumentBuilder

Constant Summary

Constants inherited from BaseArgumentBuilder

BaseArgumentBuilder::KEYWORDS

Instance Attribute Summary

Attributes inherited from BaseArgumentBuilder

#arginfo, #array_arg, #length_arg

Instance Method Summary collapse

Methods inherited from BaseArgumentBuilder

#argument_class_name, #array_length_idx, #array_length_parameter?, #closure=, #closure?, #closure_idx, #destroy_idx, #destroy_notifier?, #direction, #helper_argument?, #initialize, #mark_as_destroy_notifier, #name, #new_variable, #ownership_transfer, #safe, #specialized_type_tag, #type_info

Constructor Details

This class inherits a constructor from GirFFI::Builders::BaseArgumentBuilder

Instance Method Details

#block_argument? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gir_ffi/builders/callback_argument_builder.rb', line 15

def block_argument?
  false
end

#call_argument_name ⇒ Object 



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# File 'lib/gir_ffi/builders/callback_argument_builder.rb', line 32

def call_argument_name
  if [:in, :inout].include? direction
    pre_converted_name unless array_arg
  end
end

#capture_variable_name ⇒ Object 



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# File 'lib/gir_ffi/builders/callback_argument_builder.rb', line 38

def capture_variable_name
  unless array_arg
    result_name if [:out, :inout].include? direction
  end
end

#method_argument_name ⇒ Object 



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# File 'lib/gir_ffi/builders/callback_argument_builder.rb', line 11

def method_argument_name
  @method_argument_name ||= name || new_variable
end

#out_parameter_name ⇒ Object 



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# File 'lib/gir_ffi/builders/callback_argument_builder.rb', line 23

def out_parameter_name
  @out_parameter_name ||=
    if direction == :inout
      new_variable
    else
      pre_converted_name
    end
end

#post_conversion ⇒ Object 



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# File 'lib/gir_ffi/builders/callback_argument_builder.rb', line 57

def post_conversion
  case direction
  when :out, :inout
    [outgoing_post_conversion]
  when :error
    [
      "rescue => #{result_name}",
      outgoing_post_conversion,
      'end'
    ]
  else
    []
  end
end

#pre_conversion ⇒ Object 



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# File 'lib/gir_ffi/builders/callback_argument_builder.rb', line 44

def pre_conversion
  case direction
  when :in
    [ingoing_pre_conversion]
  when :out
    [out_parameter_preparation]
  when :inout
    [out_parameter_preparation, ingoing_pre_conversion]
  when :error
    [out_parameter_preparation, 'begin']
  end
end

#pre_converted_name ⇒ Object 



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# File 'lib/gir_ffi/builders/callback_argument_builder.rb', line 19

def pre_converted_name
  @pre_converted_name ||= new_variable
end