Class: Prism::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/masamune/abstract_syntax_tree/prism/node_extensions.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.node_predicate(name, body = -> { true }) ⇒ Object 



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# File 'lib/masamune/abstract_syntax_tree/prism/node_extensions.rb', line 5

def self.node_predicate(name, body = -> { true })
  define_method(name, &body)
  Node.define_method(name) { false } unless Node.respond_to?(name, false)
end

Instance Method Details

#comment? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/masamune/abstract_syntax_tree/prism/node_extensions.rb', line 3

def comment? = false

#line_number ⇒ Object 



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# File 'lib/masamune/abstract_syntax_tree/prism/node_extensions.rb', line 10

def line_number
  token_location.start_line
end

#token_location ⇒ Object

#location provides helpful information for the source code of a node as a whole, but in Masamune we generally want the token value itself, so we primarily get the token value's location.



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# File 'lib/masamune/abstract_syntax_tree/prism/node_extensions.rb', line 16

def token_location
  location
end

#token_value ⇒ Object

The source code of Prism nodes can be retrieved by calling #slice. However, the output tends to vary from node to node, and other methods like name, message, etc. are available in Prism nodes which means you have to know exactly which method to call the get the results you want.

The token method simplifies all of this, and just gives you the variable, method name, etc. in String form by just calling token_value.



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# File 'lib/masamune/abstract_syntax_tree/prism/node_extensions.rb', line 27

def token_value
  content
end