C tags logic

Replies

• 

  Ankita Katdare

  @#-Link-Snipped-# Interesting question.
  
  The ctags programs are used for creating an index file for different language objects found in a file or a number of files. This tag file makes it easy for us to locate these easily and faster using a text editor or other utility.
  
  A "tag" signifies a language object for which an index entry is available. Alternatively, ctags can generate a cross reference file which lists, in human readable form, information about the various source objects found in a set of language files.
  
  Can you share some example so that we can discuss things based on it?
• 

  Nikhil Lokhande

  Thanks for response 😀
  
  I want to know how it is implemented to create an index?
  
  It is parsing whole C file to find out the function definition while building index file thats what I know...
  
  I didn't go any info regarding what was the parser logic used?
  
  once u install ctags u can manually generate particular index using command
  
  ctags -x
  
  It will list all function names with line_number.
  
  Please help me out regarding parser logic?
• 

  sr patil

  @#-Link-Snipped-#, sir please can you tell me what is c tags?
• 

  Nikhil Lokhande

  sr patil

  @#-Link-Snipped-#, sir please can you tell me what is c tags?

  Ankita already explained ctags meaning 😀
  
  In Nutshell I can say that due to Ctags you can easily browse through code.
  
  e.g.
  1 function defined in first.c file
  void main()
  {
  call(a,b);
  }
  
  in second.c file u wrote function "call".
  
  When you open file first.c in vim editor and press ctrl+] , you directly goto second.c file on the line where call function is defined.
  
  Again if you press ctrl+T you will come back to first.c file where call function was called.
  
  I just gave example of function.
  It is applied to class , macro etc.
  
  It can be used in almost all languages.
  
  You can install ctags utility on your PC and check it out 😀
• 

  sr patil

  Thank you sir!
• 

  Anand Tamariya

  Do you know about token parsers and Abstract Syntax Trees (AST)? The syntax for functions and variables is well defined. You parse those tokens and decide whether it's a function or variable or logic code.
• 

  Nikhil Lokhande

  Anand Tamariya

  Do you know about token parsers and Abstract Syntax Trees (AST)? The syntax for functions and variables is well defined. You parse those tokens and decide whether it's a function or variable or logic code.

  Anand thnx alot 😀
  
  will check upon it..