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Class: RuboCop::AST::NodePattern::Parser

Relationships & Source Files
Namespace Children
Classes:
WithMeta
Extension / Inclusion / Inheritance Descendants
Subclasses:
WithMeta
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::RuboCop::SimpleForwardable, Racc::Parser
Instance Chain:
self, Racc::Parser
Inherits: Racc::Parser
  • Object
Defined in: lib/rubocop/ast/node_pattern/parser.rb,
lib/rubocop/ast/node_pattern/with_meta.rb

Overview

Parser for NodePattern Note: class reopened in parser.racc

Doc on how this fits in the compiling process: /docs/modules/ROOT/pages/node_pattern.adoc

Constant Summary

Class Method Summary

::RuboCop::SimpleForwardable - Extended

def_delegators

Instance Method Summary

Constructor Details

.new(builder = self.class::Builder.new) ⇒ Parser

[ GitHub ] 

  


# File 'lib/rubocop/ast/node_pattern/parser.rb', line 19



def initialize(builder = self.class::Builder.new)
  super()
  @builder = builder
end


  







Instance Method Details



  

    #enforce_unary(node)   (private)
  



  

    
  





  
Raises:





  [ GitHub ]


  

  


# File 'lib/rubocop/ast/node_pattern/parser.rb', line 50



def enforce_unary(node)
  return node if node.arity == 1

  detail = node.loc&.expression&.source || node.to_s
  raise NodePattern::Invalid, 'parse error, expected unary node pattern ' \
                              "but got expression matching multiple elements: #{detail}"
end


  








  

    #inspect  
  

  [ GitHub ]


  

  


# File 'lib/rubocop/ast/node_pattern/parser.rb', line 40



def inspect
  "<##{self.class}>"
end


  








  

    #on_error(token, val, _vstack)   (private)
  



  

    


Overrides Racc::Parser’s method:



  





  
Raises:





  [ GitHub ]


  

  


# File 'lib/rubocop/ast/node_pattern/parser.rb', line 59



def on_error(token, val, _vstack)
  detail = token_to_str(token) || '?'
  raise NodePattern::Invalid, "parse error on value #{val.inspect} (#{detail})"
end


  








  

    #parse(source)  ⇒ NodePattern::Node 
  



  

    


(Similar API to parser gem)
Parses a source and returns the AST.



  





  
Parameters:


    
  
  • 
    source_buffer
    (Parser::Source::Buffer, String)
—    
    

    The source buffer to parse.
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/rubocop/ast/node_pattern/parser.rb', line 31



def parse(source)
  @lexer = self.class::Lexer.new(source)
  do_parse
rescue Lexer::Error => e
  raise NodePattern::Invalid, e.message
ensure
  @lexer = nil # Don't keep references
end