![]() ![]() The tags file is a list of lines, each line in the format: This is the format used by vi and various clones. The original ctags and Exuberant Ctags have similar file formats: Ctags In the following, represents the byte with hexadecimal representation #. It is specialized for JavaScript and its packaging system CommonJS and outperforms Exuberant Ctags for JavaScript code, finding more tags than the latter. Jsctags is a ctags-compatible code indexing solution for JavaScript. It includes support for creating Emacs etags files. Hasktags creates ctags compatible tag files for Haskell source files. It includes support for Emacs compatibility.Įxuberant Ctags includes support for over 40 programming languages with the ability to add support for even more using regular expressions. Exuberant CtagsĮxuberant Ctags, written and maintained by Darren Hiebert, was initially distributed with Vim, but became a separate project upon the release of Vim 6. For those options which only make sense for vi style tag files produced by ctags, etags could not recognize them and would ignore them. There are a few variations of the ctags program: EtagsĮtags is the ctags utility that comes with Emacs. mcedit (Midnight Commander builtin editor).vi (and derivatives such as Elvis, Nvi, Vim, vile, etc.).jEdit (via plugins CodeBrowser, Tags, ClassBrowser, CtagsSideKick, and Jump).Gedit (via gedit-symbol-browser-plugin found on ). ![]() codelite use ctags as its tag indexer for code completion.Finally, the last command is used to jump back up in the tag stack to the location you initiated the previous tag search from.Tag index files are supported by many source code editors, including: If there are multiple definitions/uses for a particular tag, the tn and tp commands can be used to scroll through them, and the ts command can be used to "search" a list for the definition you want (useful when there are dozens or hundreds of definitions for some commonly-used struct). The second command can be used to search for any tag, regardless of the file that is currently opened. The first command is probably the one you will use most often: it jumps to the definition of the tag (function name, structure name, variable name, or pretty much anything) under the cursor. List all of the definitions of the last tag ![]() Go to the previous definition for the last tag Go to the next definition for the last tag Or, open any Linux source file in Vim and use the following basic commands: To search for a specific tag and open Vim to its definition, run the following command in your shell: You may see messages like "Warning: cannot open source file '.' : Permission denied" while ctags is building the tags file. To switch back to your original buffer and expand it, use C-x o to switch to it, then C-x 1 to expand. When you're done, instead of jumping back up in the tag stack, close the new buffer ( C-x k). Switch to the new buffer ( C-x o), scroll through the list of definitions to the one that you want, then press Enter to open the file. This will display a list of the tag definitions in another buffer. In this case, you can run the following two commands to list all of the uses of a given : You'll probably find that for some tags (common structures, for example), Etags finds hundreds or thousands of uses in the code, and jumping through them (with the third command above) to try to find the original definition is useless. Finally, use the fourth command to jump back up in the tag "stack." Sometimes Etags will find multiple definitions for a given tag when this is the case, use the third command to jump through the possible definitions until you find the one that you want. The second command can be used to search for any tag in the TAGS file, regardless of the file you are currently viewing. The first command is probably the one you will use most often: it jumps to the definition of the tag (function name, structure name, variable name, or pretty much anything). Say yes when prompted to load the really big tags file. The first time you run an Etags command within Emacs, you may have to specify the location of your TAGS file (i.e. ![]()
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