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Class: Prism::LibRubyParser::PrismBuffer

Do not use. This class is for internal use only.
Relationships & Source Files
Inherits: Object
Defined in: lib/prism/ffi.rb

Overview

This object represents a pm_buffer_t. We only use it as an opaque pointer, so it doesn’t need to know the fields of pm_buffer_t.

Constant Summary

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(pointer) ⇒ PrismBuffer

[ GitHub ] 

  


# File 'lib/prism/ffi.rb', line 104



def initialize(pointer)
  @pointer = pointer
end


  







Class Method Details



  

    .with(&block)  
  



  

    

Initialize a new buffer and yield it to the block. The buffer will be automatically freed when the block returns.


  



  [ GitHub ]


  

  


# File 'lib/prism/ffi.rb', line 122



def self.with(&block)
  pointer = FFI::MemoryPointer.new(SIZEOF)

  begin
    raise unless LibRubyParser.pm_buffer_init(pointer)
    yield new(pointer)
  ensure
    LibRubyParser.pm_buffer_free(pointer)
    pointer.free
  end
end


  







Instance Attribute Details



  

    #pointer   (readonly)
  

  [ GitHub ]


  

  


# File 'lib/prism/ffi.rb', line 102



attr_reader :pointer


  







Instance Method Details



  

    #length  
  

  [ GitHub ]


  

  


# File 'lib/prism/ffi.rb', line 112



def length
  LibRubyParser.pm_buffer_length(pointer)
end


  








  

    #read  
  

  [ GitHub ]


  

  


# File 'lib/prism/ffi.rb', line 116



def read
  value.read_string(length)
end


  








  

    #value  
  

  [ GitHub ]


  

  


# File 'lib/prism/ffi.rb', line 108



def value
  LibRubyParser.pm_buffer_value(pointer)
end