Exuberant CTags at http://ctags.sourceforge.net/
John Fischer wrote: > Thomas, > > What community are you tracking? > > >>> 2.4 Originating Community >>> 2.4.1 Community Name >>> >>> 2.4.2 Community Involvement >>> Indicate Sun's involvement in the community >>> [ ] Maintainer >>> [ ] Contributor >>> [x] Monitoring > > Thanks, > > John > > On Mon, 2008-12-22 at 07:28, Brian Utterback wrote: >> I am submitting this fastrack on behalf of Thomas Preisler. >> >> Exposure is open. >> >> Template Version: @(#)sac_nextcase %I% %G% SMI >> This information is Copyright 2008 Sun Microsystems >> 1. Introduction >> 1.1. Project/Component Working Name: >> Exuberant CTags >> 1.2. Name of Document Author/Supplier: >> Author: Brian Utterback >> 1.3 Date of This Document: >> 22 December, 2008 >> 4. Technical Description >> >> Exuberant Ctags is a multilanguage reimplementation of the Unix ctags >> program. It generates an index of source code object definitions which >> is used by a number of editors and tools to instantly locate the >> definitions. Exuberant Ctags currently supports the following languages: >> Assembler, ASP, AWK, BETA, C, C++, C#, COBOL, Eiffel, Erlang, >> Fortran, HTML, Java, Javascript, Lisp, Lua, Make, Pascal, Perl, >> PHP, PL/SQL, Python, REXX, Ruby, Scheme, >> Shell (Bourne, Korn, Z), S-Lang, SML (Standard ML), Tcl, Vera, >> Verilog, Vim, and YACC. >> >> This project proposes to deliver the ctags binary from the Exuberant >> CTags FOSS project renamed to exctags to avoid conflict with the >> existing ctags binary currently delivered as part of the SUNWtoo >> programming tools package. This follows the already established >> convention used by other platforms. >> >> The FOSSchecklist and man page are enclosed for review. >> >> A minor/patch binding is requested. >> -- >> blu >> >> "Murderous organizations have increased in size and scope; they are >> more daring, they are served by the most terrible weapons offered by >> modern science, and the world is nowadays threatened by new forces >> which, if recklessly unchained, may some day wreck universal >> destruction." - Arthur Griffith, 1898 >> ---------------------------------------------------------------------- >> Brian Utterback - Solaris RPE, Sun Microsystems, Inc. >> Ph:877-259-7345, Em:brian.utterback-at-ess-you-enn-dot-kom >> >> ______________________________________________________________________ >> FCL--FOSS Check List >> 1.0 Project Information >> 1.1 Name of project/component >> Exuberant Ctags Packaging for OpenSolaris >> >> 1.2 Author of document >> Thomas Preisler >> >> 2.0 Project Summary >> 2.1 Project Description >> Package current version (5.7) of Exuberant CTags release. >> >> Exuberant Ctags is a multilanguage reimplementation of the Unix >> ctags program. It generates an index of source code object definitions >> which is used by a number of editors and tools to instantly locate the >> definitions. Exuberant Ctags currently supports the following languages: >> Assembler, ASP, AWK, BETA, C, C++, C#, COBOL, Eiffel, Erlang, Fortran, >> HTML, Java, Javascript, Lisp, Lua, Make, Pascal, Perl, PHP, PL/SQL, >> Python, REXX, Ruby, Scheme, Shell (Bourne, Korn, Z), S-Lang, >> SML (Standard ML), Tcl, Vera, Verilog, Vim, and YACC. >> >> 2.2 Release binding >> What is is the release binding? >> (see >> http://opensolaris.org/os/community/arc/policies/release-taxonomy/) >> [ ] Major >> [ ] Minor >> [x] Patch or Micro >> [ ] Unknown -- ARC review required >> >> 2.3 Type of project >> Is this case a Linux Familiarity project? >> [ ] Yes >> [x] No >> >> 2.4 Originating Community >> 2.4.1 Community Name >> >> 2.4.2 Community Involvement >> Indicate Sun's involvement in the community >> [ ] Maintainer >> [ ] Contributor >> [x] Monitoring >> >> Will the project team work with the upstream community to resolve >> architectural issues of interest to Sun? >> [ ] Yes >> [x] No - briefly explain >> Not needed. >> >> Will we or are we forking from the community? >> [ ] Yes - ARC review required prior to forking >> [x] No >> >> 3.0 Technical Description >> 3.1 Installation & Sharable >> 3.1.1S Solaris Installation - section only required for Solaris Software >> (see >> http://opensolaris.org/os/community/arc/policies/install-locations/ for >> details) >> Does this project follow the Install Locations best practice? >> [x] Yes >> [ ] No - ARC review required >> >> Does this project install into /usr under >> [sbin|bin|lib|include|man|share]? >> [x] Yes >> [ ] No or N/A >> >> Does this project install into /opt? >> [ ] Yes - explain below >> [x] No or N/A >> >> Does this project install into a different directory structure? >> [ ] Yes - ARC review required >> [x] No or N/A >> >> Do any of the components of this project conflict with anything under >> /usr? >> (see http://opensolaris.org/os/community/arc/caselog/2007/047/ for >> details) >> [ ] Yes - explain below (?) >> [x] No >> Default Exuberant Ctags binary name is ctags and would naturally >> install into /usr/bin/ctags >> but Solaris ctags is already installed in /usr/bin. To avoid conflict, >> Common pratice >> is to rename the binary and install it with the different name in >> '/usr/bin'. New name of >> Exuberant Ctags is exctags which is a common alternative name used by >> many others (try google for exctags). >> >> If conflicts exist then will this project install under /usr/gnu? >> [ ] Yes >> [ ] No - ARC review required >> [x] N/A >> Note: Exuberant Ctags is not a GNU product. >> >> Is this project installing into /usr/sfw? >> [ ] Yes - ARC review required >> [x] No >> >> 3.1.1W Windows Installation - section only required for Windows Software >> Section not applicable. >> >> 3.1.2 Share and Sharable >> Does the module include any components that are used or shared by >> other projects? >> [ ] Yes >> [x] No >> >> If yes are these components packaged to be shared with the other FOSS? >> [ ] Yes >> [ ] No - ARC review required >> [x] N/A >> >> 3.2 Exported Libraries >> Are libraries being delivered by this project? >> [ ] Yes >> [x] No - continue with next section (section 3.3) >> >> 3.3 Services and the /etc Directory >> (see http://opensolaris.org/os/community/arc/policies/SMF-policy/) >> Does the project integrate anything into /etc/init.d or /etc/rc?.d? >> [ ] Yes - ARC review required >> [x] No >> >> Does the project integrate any new entries into /etc/inittab or >> /etc/inetd.conf? >> [ ] Yes - ARC review required >> [x] No >> >> Does the project integrate any private non-public files into >> /etc/default >> or /etc/ configuration files? >> [ ] Yes - ARC review required >> [x] No >> >> Does the service manifests method context grant rights above that >> of the noaccess user and basic privilege set? >> [ ] Yes - ARC review required >> [x] No >> >> 3.4 Security >> 3.4.1 Secure By Default >> (see >> http://opensolaris.org/os/community/arc/policies/secure-by-default/ for >> details) >> (see http://www.opensolaris.org/os/community/arc/policies/NITS-policy/ >> for details) >> (see parts of >> http://opensolaris.org/os/community/arc/policies/SMF-policy/ for >> addtional details) >> Are there any network services provided by this project? >> [ ] Yes >> [x] No - continue with the next section (section 3.4.2) >> >> 3.4.2 Authorization >> (see http://opensolaris.org/os/community/arc/bestpractices/rbac-intro/ >> and >> http://opensolaris.org/os/community/arc/bestpractices/rbac-profiles/ >> and >> http://opensolaris.org/os/community/arc/bestpractices/rbac-profiles/ >> for details) >> Are there any setuid/setgid privileged binaries in the project? >> [ ] Yes - ARC review required >> [x] No - continue with next section (section 3.4.3) >> >> 3.4.3 Auditing >> (see http://opensolaris.org/os/community/arc/policies/audit-policy/ >> for details) >> (see http://opensolaris.org/os/community/arc/caselog/2003/397 for >> details) >> Does this component contain administrative or security enforcing >> software? >> [ ] Yes - ARC review required >> [x] No - continue to next section (section 3.4.4) >> >> 3.4.4 Authentication >> (see http://opensolaris.org/os/community/arc/policies/PAM/) >> Do the components contain any authentication code? >> [ ] Yes >> [x] No - continue to next section (section 3.4.5) >> >> 3.4.5 Passwords >> (see >> http://opensolaris.org/os/community/arc/bestpractices/passwords-cli/ and >> >> http://opensolaris.org/os/community/arc/bestpractices/passwords-files/ for >> details) >> Do any of the components for the project deal with passwords? >> [ ] Yes >> [x] No - continue to next section (section 3.4.6) >> >> 3.4.6 General Security Questions >> (see >> http://opensolaris.org/os/community/arc/bestpractices/security-questions/ >> for details) >> Are there any network protocols used by this project? >> [ ] Yes >> [x] No - continue with the next section (section 3.5) >> >> 3.5 Networking >> Do the components access the network? >> [ ] Yes >> [x] No - continue with the next section (section 3.6) >> >> 3.6 Core Solaris Components >> Do the components of this project compete with or duplicate core >> Solaris components? >> [ ] Yes - ARC review required >> [x] No >> >> Examples of Core Solaris Components include but are not limited to: >> >> Secure By Default >> Authorizations >> PAM -- Plugable Authentication Module >> Privilege >> PRM -- Process Rights Management -- Privilege >> Audit >> xVm -- Virtualization >> zones / Solaris Containers >> PRM -- Process Rights Management >> RBAC -- Role Based Access Control >> TX / Trusted Extensions >> ZFS >> SMF -- Service Management Facility >> FMA -- Fault Management Architecture >> SCF -- Smart Card Facility >> IPsec >> >> 4.0 Interfaces >> (see >> http://www.opensolaris.org/os/community/arc/policies/interface-taxonomy/ for >> details) >> 4.1 Exported Interfaces >> >> Interface Name Classification Comments >> ---------------- -------------- ---------------------- >> SUNWexctags Uncommitted Package >> /usr/bin/exctags Uncommitted Executable binary file >> >> 4.2 Imported Interfaces >> Interface Name Classification Comments >> --------------------------- -------------------- >> -------------------------- >> >> >> Brief Interface Classifications - See Appendix C for definitions >> Volatile - interfaces are fluid and will follow a rapidly changing >> community >> Uncommitted - interfaces are still evolving in the community and might >> follow >> the community >> Committed - interfaces are stable in the community >> Project Private - no review required, just document in table >> Contracted (interface modifier) - further review required >> >> >> ______________________________________________________________________ >> >> Exuberant Ctags CTAGS(1) >> >> >> >> NAME >> ctags - Generate tag files for source code >> >> >> >> SYNOPSIS >> ctags [options] [file(s)] >> >> etags [options] [file(s)] >> >> >> >> DESCRIPTION >> The ctags and etags programs (hereinafter collectively >> referred to as ctags, except where distinguished) generate >> an index (or "tag") file for a variety of language objects >> found in file(s). This tag file allows these items to be >> quickly and easily located by a text editor or other util- >> ity. A "tag" signifies a language object for which an index >> entry is available (or, alternatively, the index entry >> created for that object). >> >> 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. >> >> Tag index files are supported by numerous editors, which >> allow the user to locate the object associated with a name >> appearing in a source file and jump to the file and line >> which defines the name. Those known about at the time of >> this release are: >> >> Vi(1) and its derivatives (e.g. Elvis, Vim, Vile, >> Lemmy), CRiSP, Emacs, FTE (Folding Text Editor), JED, >> jEdit, Mined, NEdit (Nirvana Edit), TSE (The SemWare >> Editor), UltraEdit, WorkSpace, X2, Zeus >> >> Ctags is capable of generating different kinds of tags for >> each of many different languages. For a complete list of >> supported languages, the names by which they are recognized, >> and the kinds of tags which are generated for each, see the >> --list-languages and --list-kinds options. >> >> >> >> SOURCE FILES >> Unless the --language-force option is specified, the >> language of each source file is automatically selected based >> upon a mapping of file names to languages. The mappings in >> effect for each language may be display using the >> --list-maps option and may be changed using the --langmap >> option. On platforms which support it, if the name of a >> >> >> >> Darren Hiebert Last change: Version 5.7 1 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> file is not mapped to a language and the file is executable, >> the first line of the file is checked to see if the file is >> a "#!" script for a recognized language. >> >> By default, all other files names are ignored. This permits >> running ctags on all files in either a single directory >> (e.g. "ctags *"), or on all files in an entire source direc- >> tory tree (e.g. "ctags -R"), since only those files whose >> names are mapped to languages will be scanned. >> >> [The reason that .h extensions are mapped to C++ files >> rather than C files is because it is common to use .h exten- >> sions in C++, and no harm results in treating them as C++ >> files.] >> >> >> >> OPTIONS >> Despite the wealth of available options, defaults are set so >> that ctags is most commonly executed without any options >> (e.g. "ctags *", or "ctags -R"), which will create a tag >> file in the current directory for all recognized source >> files. The options described below are provided merely to >> allow custom tailoring to meet special needs. >> >> Note that spaces separating the single-letter options from >> their parameters are optional. >> >> Note also that the boolean parameters to the long form >> options (those beginning with "--" and that take a >> "[=yes|no]" parameter) may be omitted, in which case "=yes" >> is implied. (e.g. --sort is equivalent to --sort=yes). Note >> further that "=1" and "=on" are considered synonyms for >> "=yes", and that "=0" and "=off" are considered synonyms for >> "=no". >> >> Some options are either ignored or useful only when used >> while running in etags mode (see -e option). Such options >> will be noted. >> >> Most options may appear anywhere on the command line, >> affecting only those files which follow the option. A few >> options, however, must appear before the first file name and >> will be noted as such. >> >> Options taking language names will accept those names in >> either upper or lower case. See the --list-languages option >> for a complete list of the built-in language names. >> >> >> -a Equivalent to --append. >> >> >> >> >> Darren Hiebert Last change: Version 5.7 2 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> -B Use backward searching patterns (e.g. ?pattern?). >> [Ignored in etags mode] >> >> >> -e Enable etags mode, which will create a tag file for use >> with the Emacs editor. Alternatively, if ctags is >> invoked by a name containing the string "etags" (either >> by renaming, or creating a link to, the executable), >> etags mode will be enabled. This option must appear >> before the first file name. >> >> >> -f tagfile >> Use the name specified by tagfile for the tag file >> (default is "tags", or "TAGS" when running in etags >> mode). If tagfile is specified as "-", then the tag >> file is written to standard output instead. Ctags will >> stubbornly refuse to take orders if tagfile exists and >> its first line contains something other than a valid >> tags line. This will save your neck if you mistakenly >> type "ctags -f *.c", which would otherwise overwrite >> your first C file with the tags generated by the rest! >> It will also refuse to accept a multi-character file >> name which begins with a '-' (dash) character, since >> this most likely means that you left out the tag file >> name and this option tried to grab the next option as >> the file name. If you really want to name your output >> tag file "-ugly", specify it as "./-ugly". This option >> must appear before the first file name. If this option >> is specified more than once, only the last will apply. >> >> >> -F Use forward searching patterns (e.g. /pattern/) >> (default). [Ignored in etags mode] >> >> >> -h list >> Specifies a list of file extensions, separated by >> periods, which are to be interpreted as include (or >> header) files. To indicate files having no extension, >> use a period not followed by a non-period character >> (e.g. ".", "..x", ".x."). This option only affects how >> the scoping of a particular kinds of tags is inter- >> preted (i.e. whether or not they are considered as glo- >> bally visible or visible only within the file in which >> they are defined); it does not map the extension to any >> particular language. Any tag which is located in a >> non-include file and cannot be seen (e.g. linked to) >> from another file is considered to have file-limited >> (e.g. static) scope. No kind of tag appearing in an >> include file will be considered to have file-limited >> scope. If the first character in the list is a plus >> >> >> >> Darren Hiebert Last change: Version 5.7 3 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> sign, then the extensions in the list will be appended >> to the current list; otherwise, the list will replace >> the current list. See, also, the --file-scope option. >> The default list is ".h.H.hh.hpp.hxx.h++.inc.def". To >> restore the default list, specify -h default. Note that >> if an extension supplied to this option is not already >> mapped to a particular language (see SOURCE FILES, >> above), you will also need to use either the --langmap >> or --language-force option. >> >> >> -I identifier-list >> Specifies a list of identifiers which are to be spe- >> cially handled while parsing C and C++ source files. >> This option is specifically provided to handle special >> cases arising through the use of preprocessor macros. >> When the identifiers listed are simple identifiers, >> these identifiers will be ignored during parsing of the >> source files. If an identifier is suffixed with a '+' >> character, ctags will also ignore any parenthesis- >> enclosed argument list which may immediately follow the >> identifier in the source files. If two identifiers are >> separated with the '=' character, the first identifiers >> is replaced by the second identifiers for parsing pur- >> poses. The list of identifiers may be supplied directly >> on the command line or read in from a separate file. If >> the first character of identifier-list is '@', '.' or a >> pathname separator ('/' or '\'), or the first two char- >> acters specify a drive letter (e.g. "C:"), the parame- >> ter identifier-list will be interpreted as a filename >> from which to read a list of identifiers, one per input >> line. Otherwise, identifier-list is a list of identif- >> iers (or identifier pairs) to be specially handled, >> each delimited by a either a comma or by white space >> (in which case the list should be quoted to keep the >> entire list as one command line argument). Multiple -I >> options may be supplied. To clear the list of ignore >> identifiers, supply a single dash ("-") for >> identifier-list. >> >> This feature is useful when preprocessor macros are >> used in such a way that they cause syntactic confusion >> due to their presence. Indeed, this is the best way of >> working around a number of problems caused by the pres- >> ence of syntax-busting macros in source files (see >> CAVEATS, below). Some examples will illustrate this >> point. >> >> int foo ARGDECL4(void *, ptr, long int, nbytes) >> >> >> In the above example, the macro "ARGDECL4" would be >> >> >> >> Darren Hiebert Last change: Version 5.7 4 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> mistakenly interpreted to be the name of the function >> instead of the correct name of "foo". Specifying -I >> ARGDECL4 results in the correct behavior. >> >> /* creates an RCS version string in module */ >> MODULE_VERSION("$Revision: 590 $") >> >> >> In the above example the macro invocation looks too >> much like a function definition because it is not fol- >> lowed by a semicolon (indeed, it could even be followed >> by a global variable definition that would look much >> like a K&R style function parameter declaration). In >> fact, this seeming function definition could possibly >> even cause the rest of the file to be skipped over >> while trying to complete the definition. Specifying -I >> MODULE_VERSION+ would avoid such a problem. >> >> CLASS Example { >> // your content here >> }; >> >> >> The example above uses "CLASS" as a preprocessor macro >> which expands to something different for each platform. >> For instance CLASS may be defined as "class >> __declspec(dllexport)" on Win32 platforms and simply >> "class" on UNIX. Normally, the absence of the C++ key- >> word "class" would cause the source file to be >> incorrectly parsed. Correct behavior can be restored by >> specifying -I CLASS=class. >> >> >> -L file >> Read from file a list of file names for which tags >> should be generated. If file is specified as "-", then >> file names are read from standard input. File names >> read using this option are processed following file >> names appearing on the command line. Options are also >> accepted in this input. If this option is specified >> more than once, only the last will apply. Note: file >> is read in line-oriented mode, where a new line is the >> only delimiter and non-trailing white space is con- >> sidered significant, in order that file names contain- >> ing spaces may be supplied (however, trailing white >> space is stripped from lines); this can affect how >> options are parsed if included in the input. >> >> >> -n Equivalent to --excmd=number. >> >> >> >> >> >> Darren Hiebert Last change: Version 5.7 5 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> -N Equivalent to --excmd=pattern. >> >> >> -o tagfile >> Equivalent to -f tagfile. >> >> >> -R Equivalent to --recurse. >> >> >> -u Equivalent to --sort=no (i.e. "unsorted"). >> >> >> -V Equivalent to --verbose. >> >> >> -w This option is silently ignored for backward- >> compatibility with the ctags of SVR4 Unix. >> >> >> -x Print a tabular, human-readable cross reference (xref) >> file to standard output instead of generating a tag >> file. The information contained in the output includes: >> the tag name; the kind of tag; the line number, file >> name, and source line (with extra white space con- >> densed) of the file which defines the tag. No tag file >> is written and all options affecting tag file output >> will be ignored. Example applications for this feature >> are generating a listing of all functions located in a >> source file (e.g. ctags -x --c-kinds=f file), or gen- >> erating a list of all externally visible global vari- >> ables located in a source file (e.g. ctags -x >> --c-kinds=v --file-scope=no file). This option must >> appear before the first file name. >> >> >> --append[=yes|no] >> Indicates whether tags generated from the specified >> files should be appended to those already present in >> the tag file or should replace them. This option is off >> by default. This option must appear before the first >> file name. >> >> >> --etags-include=file >> Include a reference to file in the tag file. This >> option may be specified as many times as desired. This >> supports Emacs' capability to use a tag file which >> "includes" other tag files. [Available only in etags >> mode] >> >> >> >> >> >> Darren Hiebert Last change: Version 5.7 6 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> --exclude=[pattern] >> Add pattern to a list of excluded files and direc- >> tories. This option may be specified as many times as >> desired. For each file name considered by ctags, each >> pattern specified using this option will be compared >> against both the complete path (e.g. >> some/path/base.ext) and the base name (e.g. base.ext) >> of the file, thus allowing patterns which match a given >> file name irrespective of its path, or match only a >> specific path. If appropriate support is available from >> the runtime library of your C compiler, then pattern >> may contain the usual shell wildcards (not regular >> expressions) common on Unix (be sure to quote the >> option parameter to protect the wildcards from being >> expanded by the shell before being passed to ctags; >> also be aware that wildcards can match the slash char- >> acter, '/'). You can determine if shell wildcards are >> available on your platform by examining the output of >> the --version option, which will include "+wildcards" >> in the compiled feature list; otherwise, pattern is >> matched against file names using a simple textual com- >> parison. >> >> If pattern begins with the character '@', then the rest >> of the string is interpreted as a file name from which >> to read exclusion patterns, one per line. If pattern is >> empty, the list of excluded patterns is cleared. Note >> that at program startup, the default exclude list con- >> tains "EIFGEN", "SCCS", "RCS", and "CVS", which are >> names of directories for which it is generally not >> desirable to descend while processing the --recurse >> option. >> >> >> --excmd=type >> Determines the type of EX command used to locate tags >> in the source file. [Ignored in etags mode] >> >> The valid values for type (either the entire word or >> the first letter is accepted) are: >> >> >> number Use only line numbers in the tag file for >> locating tags. This has four advantages: >> 1. Significantly reduces the size of the >> resulting tag file. >> 2. Eliminates failures to find tags because >> the line defining the tag has changed, >> causing the pattern match to fail (note >> that some editors, such as vim, are able >> to recover in many such instances). >> 3. Eliminates finding identical matching, but >> >> >> >> Darren Hiebert Last change: Version 5.7 7 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> incorrect, source lines (see BUGS, below). >> 4. Retains separate entries in the tag file >> for lines which are identical in content. >> In pattern mode, duplicate entries are >> dropped because the search patterns they >> generate are identical, making the dupli- >> cate entries useless. >> >> >> However, this option has one significant draw- >> back: changes to the source files can cause >> the line numbers recorded in the tag file to >> no longer correspond to the lines in the >> source file, causing jumps to some tags to >> miss the target definition by one or more >> lines. Basically, this option is best used >> when the source code to which it is applied is >> not subject to change. Selecting this option >> type causes the following options to be >> ignored: -BF. >> >> >> pattern Use only search patterns for all tags, rather >> than the line numbers usually used for macro >> definitions. This has the advantage of not >> referencing obsolete line numbers when lines >> have been added or removed since the tag file >> was generated. >> >> >> mixed In this mode, patterns are generally used with >> a few exceptions. For C, line numbers are used >> for macro definition tags. This was the >> default format generated by the original ctags >> and is, therefore, retained as the default for >> this option. For Fortran, line numbers are >> used for common blocks because their >> corresponding source lines are generally >> identical, making pattern searches useless for >> finding all matches. >> >> >> --extra=[+|-]flags >> Specifies whether to include extra tag entries for cer- >> tain kinds of information. The parameter flags is a set >> of one-letter flags, each representing one kind of >> extra tag entry to include in the tag file. If flags is >> preceded by by either the '+' or '-' character, the >> effect of each flag is added to, or removed from, those >> currently enabled; otherwise the flags replace any >> current settings. The meaning of each flag is as fol- >> lows: >> >> >> >> Darren Hiebert Last change: Version 5.7 8 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> f Include an entry for the base file name of every >> source file (e.g. "example.c"), which addresses >> the first line of the file. >> >> q Include an extra class-qualified tag entry for >> each tag which is a member of a class (for >> languages for which this information is >> extracted; currently C++, Eiffel, and Java). The >> actual form of the qualified tag depends upon >> the language from which the tag was derived >> (using a form that is most natural for how qual- >> ified calls are specified in the language). For >> C++, it is in the form "class::member"; for Eif- >> fel and Java, it is in the form "class.member". >> This may allow easier location of a specific >> tags when multiple occurrences of a tag name >> occur in the tag file. Note, however, that this >> could potentially more than double the size of >> the tag file. >> >> >> --fields=[+|-]flags >> Specifies the available extension fields which are to >> be included in the entries of the tag file (see TAG >> FILE FORMAT, below, for more information). The parame- >> ter flags is a set of one-letter flags, each represent- >> ing one type of extension field to include, with the >> following meanings (disabled by default unless indi- >> cated): >> >> >> a Access (or export) of class members >> f File-restricted scoping [enabled] >> i Inheritance information >> k Kind of tag as a single letter [enabled] >> K Kind of tag as full name >> l Language of source file containing tag >> m Implementation information >> n Line number of tag definition >> s Scope of tag definition [enabled] >> S Signature of routine (e.g. prototype or parame- >> ter list) >> z Include the "kind:" key in kind field >> t Type and name of a variable or typedef as >> "typeref:" field [enabled] >> >> Each letter or group of letters may be preceded by >> either '+' to add it to the default set, or '-' to >> exclude it. In the absence of any preceding '+' or '-' >> sign, only those kinds explicitly listed in flags will >> be included in the output (i.e. overriding the default >> set). This option is ignored if the option --format=1 >> >> >> >> Darren Hiebert Last change: Version 5.7 9 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> has been specified. The default value of this option is >> fks. >> >> >> --file-scope[=yes|no] >> Indicates whether tags scoped only for a single file >> (i.e. tags which cannot be seen outside of the file in >> which they are defined, such as "static" tags) should >> be included in the output. See, also, the -h option. >> This option is enabled by default. >> >> >> --filter[=yes|no] >> Causes ctags to behave as a filter, reading source file >> names from standard input and printing their tags to >> standard output on a file-by-file basis. If --sorted is >> enabled, tags are sorted only within the source file in >> which they are defined. File names are read from stan- >> dard input in line-oriented input mode (see note for -L >> option) and only after file names listed on the command >> line or from any file supplied using the -L option. >> When this option is enabled, the options -f, -o, and >> --totals are ignored. This option is quite esoteric and >> is disabled by default. This option must appear before >> the first file name. >> >> >> --filter-terminator=string >> Specifies a string to print to standard output follow- >> ing the tags for each file name parsed when the >> --filter option is enabled. This may permit an applica- >> tion reading the output of ctags to determine when the >> output for each file is finished. Note that if the file >> name read is a directory and --recurse is enabled, this >> string will be printed only one once at the end of all >> tags found for by descending the directory. This string >> will always be separated from the last tag line for the >> file by its terminating newline. This option is quite >> esoteric and is empty by default. This option must >> appear before the first file name. >> >> >> --format=level >> Change the format of the output tag file. Currently the >> only valid values for level are 1 or 2. Level 1 speci- >> fies the original tag file format and level 2 specifies >> a new extended format containing extension fields (but >> in a manner which retains backward-compatibility with >> original vi(1) implementations). The default level is >> 2. This option must appear before the first file name. >> [Ignored in etags mode] >> >> >> >> >> Darren Hiebert Last change: Version 5.7 10 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> --help >> Prints to standard output a detailed usage description, >> and then exits. >> >> >> --if0[=yes|no] >> Indicates a preference as to whether code within an >> "#if 0" branch of a preprocessor conditional should be >> examined for non-macro tags (macro tags are always >> included). Because the intent of this construct is to >> disable code, the default value of this option is no. >> Note that this indicates a preference only and does not >> guarantee skipping code within an "#if 0" branch, since >> the fall-back algorithm used to generate tags when >> preprocessor conditionals are too complex follows all >> branches of a conditional. This option is disabled by >> default. >> >> >> --<LANG>-kinds=[+|-]kinds >> Specifies a list of language-specific kinds of tags (or >> kinds) to include in the output file for a particular >> language, where <LANG> is case-insensitive and is one >> of the built-in language names (see the >> --list-languages option for a complete list). The >> parameter kinds is a group of one-letter flags desig- >> nating kinds of tags (particular to the language) to >> either include or exclude from the output. The specific >> sets of flags recognized for each language, their mean- >> ings and defaults may be list using the --list-kinds >> option. Each letter or group of letters may be preceded >> by either '+' to add it to, or '-' to remove it from, >> the default set. In the absence of any preceding '+' or >> '-' sign, only those kinds explicitly listed in kinds >> will be included in the output (i.e. overriding the >> default for the specified language). >> >> As an example for the C language, in order to add pro- >> totypes and external variable declarations to the >> default set of tag kinds, but exclude macros, use >> --c-kinds=+px-d; to include only tags for functions, >> use --c-kinds=f. >> >> >> --langdef=name >> Defines a new user-defined language, name, to be parsed >> with regular expressions. Once defined, name may be >> used in other options taking language names. The typi- >> cal use of this option is to first define the language, >> then map file names to it using --langmap, then specify >> regular expressions using --regex-<LANG> to define how >> its tags are found. >> >> >> >> Darren Hiebert Last change: Version 5.7 11 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> --langmap=map[,map[...]] >> Controls how file names are mapped to languages (see >> the --list-maps option). Each comma-separated map con- >> sists of the language name (either a built-in or user- >> defined language), a colon, and a list of file exten- >> sions and/or file name patterns. A file extension is >> specified by preceding the extension with a period >> (e.g. ".c"). A file name pattern is specified by >> enclosing the pattern in parentheses (e.g. >> "([Mm]akefile)"). If appropriate support is available >> from the runtime library of your C compiler, then the >> file name pattern may contain the usual shell wildcards >> common on Unix (be sure to quote the option parameter >> to protect the wildcards from being expanded by the >> shell before being passed to ctags). You can determine >> if shell wildcards are available on your platform by >> examining the output of the --version option, which >> will include "+wildcards" in the compiled feature list; >> otherwise, the file name patterns are matched against >> file names using a simple textual comparison. When map- >> ping a file extension, it will first be unmapped from >> any other languages. >> >> If the first character in a map is a plus sign, then >> the extensions and file name patterns in that map will >> be appended to the current map for that language; oth- >> erwise, the map will replace the current map. For exam- >> ple, to specify that only files with extensions of .c >> and .x are to be treated as C language files, use >> "--langmap=c:.c.x"; to also add files with extensions >> of .j as Java language files, specify >> "--langmap=c:.c.x,java:+.j". To map makefiles (e.g. >> files named either "Makefile", "makefile", or having >> the extension ".mak") to a language called "make", >> specify "--langmap=make:([Mm]akefile).mak". To map >> files having no extension, specify a period not fol- >> lowed by a non-period character (e.g. ".", "..x", >> ".x."). To clear the mapping for a particular language >> (thus inhibiting automatic generation of tags for that >> language), specify an empty extension list (e.g. >> "--langmap=fortran:"). To restore the default language >> mappings for all a particular language, supply the key- >> word "default" for the mapping. To specify restore the >> default language mappings for all languages, specify >> "--langmap=default". Note that file extensions are >> tested before file name patterns when inferring the >> language of a file. >> >> >> --language-force=language >> By default, ctags automatically selects the language of >> a source file, ignoring those files whose language >> >> >> >> Darren Hiebert Last change: Version 5.7 12 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> cannot be determined (see SOURCE FILES, above). This >> option forces the specified language (case-insensitive; >> either built-in or user-defined) to be used for every >> supplied file instead of automatically selecting the >> language based upon its extension. In addition, the >> special value auto indicates that the language should >> be automatically selected (which effectively disables >> this option). >> >> >> --languages=[+|-]list >> Specifies the languages for which tag generation is >> enabled, with list containing a comma-separated list of >> language names (case-insensitive; either built-in or >> user-defined). If the first language of list is not >> preceded by either a '+' or '-', the current list will >> be cleared before adding or removing the languages in >> list. Until a '-' is encountered, each language in the >> list will be added to the current list. As either the >> '+' or '-' is encountered in the list, the languages >> following it are added or removed from the current >> list, respectively. Thus, it becomes simple to replace >> the current list with a new one, or to add or remove >> languages from the current list. The actual list of >> files for which tags will be generated depends upon the >> language extension mapping in effect (see the --langmap >> option). Note that all languages, including user- >> defined languages are enabled unless explicitly dis- >> abled using this option. Language names included in >> list may be any built-in language or one previously >> defined with --langdef. The default is "all", which is >> also accepted as a valid argument. See the >> --list-languages option for a complete list of the >> built-in language names. >> >> >> --license >> Prints a summary of the software license to standard >> output, and then exits. >> >> >> --line-directives[=yes|no] >> Specifies whether "#line" directives should be recog- >> nized. These are present in the output of preprocessors >> and contain the line number, and possibly the file >> name, of the original source file(s) from which the >> preprocessor output file was generated. When enabled, >> this option will cause ctags to generate tag entries >> marked with the file names and line numbers of their >> locations original source file(s), instead of their >> actual locations in the preprocessor output. The actual >> file names placed into the tag file will have the same >> >> >> >> Darren Hiebert Last change: Version 5.7 13 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> leading path components as the preprocessor output >> file, since it is assumed that the original source >> files are located relative to the preprocessor output >> file (unless, of course, the #line directive specifies >> an absolute path). This option is off by default. Note: >> This option is generally only useful when used together >> with the --excmd=number (-n) option. Also, you may have >> to use either the --langmap or --language-force option >> if the extension of the preprocessor output file is not >> known to ctags. >> >> >> --links[=yes|no] >> Indicates whether symbolic links (if supported) should >> be followed. When disabled, symbolic links are ignored. >> This option is on by default. >> >> >> --list-kinds[=language|all] >> Lists the tag kinds recognized for either the specified >> language or all languages, and then exits. Each kind of >> tag recorded in the tag file is represented by a one- >> letter flag, which is also used to filter the tags >> placed into the output through use of the >> --<LANG>-kinds option. Note that some languages and/or >> tag kinds may be implemented using regular expressions >> and may not be available if regex support is not com- >> piled into ctags (see the --regex-<LANG> option). Each >> kind listed is enabled unless followed by "[off]". >> >> >> --list-maps[=language|all] >> Lists the file extensions and file name patterns which >> associate a file name with a language for either the >> specified language or all languages, and then exits. >> See the --langmap option, and SOURCE FILES, above. >> >> >> --list-languages >> Lists the names of the languages understood by ctags, >> and then exits. These language names are case insensi- >> tive and may be used in the --language-force, >> --languages, --<LANG>-kinds, and --regex-<LANG> >> options. >> >> >> --options=file >> Read additional options from file. The file should con- >> tain one option per line. As a special case, if >> --options=NONE is specified as the first option on the >> command line, it will disable the automatic reading of >> any configuration options from either a file or the >> >> >> >> Darren Hiebert Last change: Version 5.7 14 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> environment (see FILES). >> >> >> --recurse[=yes|no] >> Recurse into directories encountered in the list of >> supplied files. If the list of supplied files is empty >> and no file list is specified with the -L option, then >> the current directory (i.e. ".") is assumed. Symbolic >> links are followed. If you don't like these behaviors, >> either explicitly specify the files or pipe the output >> of find(1) into ctags -L- instead. Note: This option is >> not supported on all platforms at present. It is >> available if the output of the --help option includes >> this option. See, also, the --exclude to limit recur- >> sion. >> >> >> --regex-<LANG>=/regexp/replacement/[kind-spec/][flags] >> The /regexp/replacement/ pair define a regular expres- >> sion replacement pattern, similar in style to sed sub- >> stitution commands, with which to generate tags from >> source files mapped to the named language, <LANG>, >> (case-insensitive; either a built-in or user-defined >> language). The regular expression, regexp, defines an >> extended regular expression (roughly that used by >> egrep(1)), which is used to locate a single source line >> containing a tag and may specify tab characters using >> \t. When a matching line is found, a tag will be gen- >> erated for the name defined by replacement, which gen- >> erally will contain the special back-references \1 >> through \9 to refer to matching sub-expression groups >> within regexp. The '/' separator characters shown in >> the parameter to the option can actually be replaced by >> any character. Note that whichever separator character >> is used will have to be escaped with a backslash ('\') >> character wherever it is used in the parameter as some- >> thing other than a separator. The regular expression >> defined by this option is added to the current list of >> regular expressions for the specified language unless >> the parameter is omitted, in which case the current >> list is cleared. >> >> Unless modified by flags, regexp is interpreted as a >> Posix extended regular expression. The replacement >> should expand for all matching lines to a non-empty >> string of characters, or a warning message will be >> reported. An optional kind specifier for tags matching >> regexp may follow replacement, which will determine >> what kind of tag is reported in the "kind" extension >> field (see TAG FILE FORMAT, below). The full form of >> kind-spec is in the form of a single letter, a comma, a >> name (without spaces), a comma, a description, followed >> >> >> >> Darren Hiebert Last change: Version 5.7 15 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> by a separator, which specify the short and long forms >> of the kind value and its textual description >> (displayed using --list-kinds). Either the kind name >> and/or the description may be omitted. If kind-spec is >> omitted, it defaults to "r,regex". Finally, flags are >> one or more single-letter characters having the follow- >> ing effect upon the interpretation of regexp: >> >> >> b The pattern is interpreted as a Posix basic reg- >> ular expression. >> >> e The pattern is interpreted as a Posix extended >> regular expression (default). >> >> i The regular expression is to be applied in a >> case-insensitive manner. >> >> Note that this option is available only if ctags was >> compiled with support for regular expressions, which >> depends upon your platform. You can determine if sup- >> port for regular expressions is compiled in by examin- >> ing the output of the --version option, which will >> include "+regex" in the compiled feature list. >> >> For more information on the regular expressions used by >> ctags, see either the regex(5,7) man page, or the GNU >> info documentation for regex (e.g. "info regex"). >> >> >> --sort[=yes|no|foldcase] >> Indicates whether the tag file should be sorted on the >> tag name (default is yes). Note that the original vi(1) >> required sorted tags. The foldcase value specifies case >> insensitive (or case-folded) sorting. Fast binary >> searches of tag files sorted with case-folding will >> require special support from tools using tag files, >> such as that found in the ctags readtags library, or >> Vim version 6.2 or higher (using "set ignorecase"). >> This option must appear before the first file name. >> [Ignored in etags mode] >> >> >> --tag-relative[=yes|no] >> Indicates that the file paths recorded in the tag file >> should be relative to the directory containing the tag >> file, rather than relative to the current directory, >> unless the files supplied on the command line are >> specified with absolute paths. This option must appear >> before the first file name. The default is yes when >> running in etags mode (see the -e option), no other- >> wise. >> >> >> >> Darren Hiebert Last change: Version 5.7 16 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> --totals[=yes|no] >> Prints statistics about the source files read and the >> tag file written during the current invocation of >> ctags. This option is off by default. This option must >> appear before the first file name. >> >> >> --verbose[=yes|no] >> Enable verbose mode. This prints out information on >> option processing and a brief message describing what >> action is being taken for each file considered by >> ctags. Normally, ctags does not read command line argu- >> ments until after options are read from the configura- >> tion files (see FILES, below) and the CTAGS environment >> variable. However, if this option is the first argument >> on the command line, it will take effect before any >> options are read from these sources. The default is no. >> >> >> --version >> Prints a version identifier for ctags to standard out- >> put, and then exits. This is guaranteed to always con- >> tain the string "Exuberant Ctags". >> >> >> >> OPERATIONAL DETAILS >> As ctags considers each file name in turn, it tries to >> determine the language of the file by applying the following >> three tests in order: if the file extension has been mapped >> to a language, if the file name matches a shell pattern >> mapped to a language, and finally if the file is executable >> and its first line specifies an interpreter using the Unix- >> style "#!" specification (if supported on the platform). If >> a language was identified, the file is opened and then the >> appropriate language parser is called to operate on the >> currently open file. The parser parses through the file and >> adds an entry to the tag file for each language object it is >> written to handle. See TAG FILE FORMAT, below, for details >> on these entries. >> >> This implementation of ctags imposes no formatting require- >> ments on C code as do legacy implementations. Older imple- >> mentations of ctags tended to rely upon certain formatting >> assumptions in order to help it resolve coding dilemmas >> caused by preprocessor conditionals. >> >> In general, ctags tries to be smart about conditional >> preprocessor directives. If a preprocessor conditional is >> encountered within a statement which defines a tag, ctags >> follows only the first branch of that conditional (except in >> the special case of "#if 0", in which case it follows only >> >> >> >> Darren Hiebert Last change: Version 5.7 17 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> the last branch). The reason for this is that failing to >> pursue only one branch can result in ambiguous syntax, as in >> the following example: >> >> #ifdef TWO_ALTERNATIVES >> struct { >> #else >> union { >> #endif >> short a; >> long b; >> } >> >> Both branches cannot be followed, or braces become unbal- >> anced and ctags would be unable to make sense of the syntax. >> >> If the application of this heuristic fails to properly parse >> a file, generally due to complicated and inconsistent pair- >> ing within the conditionals, ctags will retry the file using >> a different heuristic which does not selectively follow con- >> ditional preprocessor branches, but instead falls back to >> relying upon a closing brace ("}") in column 1 as indicating >> the end of a block once any brace imbalance results from >> following a #if conditional branch. >> >> Ctags will also try to specially handle arguments lists >> enclosed in double sets of parentheses in order to accept >> the following conditional construct: >> >> extern void foo __ARGS((int one, char two)); >> >> Any name immediately preceding the "((" will be automati- >> cally ignored and the previous name will be used. >> >> C++ operator definitions are specially handled. In order for >> consistency with all types of operators (overloaded and >> conversion), the operator name in the tag file will always >> be preceded by the string "operator " (i.e. even if the >> actual operator definition was written as "operator<<"). >> >> After creating or appending to the tag file, it is sorted by >> the tag name, removing identical tag lines. >> >> >> >> TAG FILE FORMAT >> When not running in etags mode, each entry in the tag file >> consists of a separate line, each looking like this in the >> most general case: >> >> tag_name<TAB>file_name<TAB>ex_cmd;"<TAB>extension_fields >> >> >> >> >> Darren Hiebert Last change: Version 5.7 18 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> The fields and separators of these lines are specified as >> follows: >> >> 1. tag name >> 2. single tab character >> 3. name of the file in which the object associated with >> the tag is located >> 4. single tab character >> 5. EX command used to locate the tag within the file; >> generally a search pattern (either /pattern/ or >> ?pattern?) or line number (see --excmd). Tag file >> format 2 (see --format) extends this EX command >> under certain circumstances to include a set of >> extension fields (described below) embedded in an EX >> comment immediately appended to the EX command, >> which leaves it backward-compatible with original >> vi(1) implementations. >> >> A few special tags are written into the tag file for inter- >> nal purposes. These tags are composed in such a way that >> they always sort to the top of the file. Therefore, the >> first two characters of these tags are used a magic number >> to detect a tag file for purposes of determining whether a >> valid tag file is being overwritten rather than a source >> file. >> >> Note that the name of each source file will be recorded in >> the tag file exactly as it appears on the command line. >> Therefore, if the path you specified on the command line was >> relative to the current directory, then it will be recorded >> in that same manner in the tag file. See, however, the >> --tag-relative option for how this behavior can be modified. >> >> Extension fields are tab-separated key-value pairs appended >> to the end of the EX command as a comment, as described >> above. These key value pairs appear in the general form >> "key:value". Their presence in the lines of the tag file are >> controlled by the --fields option. The possible keys and the >> meaning of their values are as follows: >> >> >> access Indicates the visibility of this class member, >> where value is specific to the language. >> >> >> file Indicates that the tag has file-limited visibil- >> ity. This key has no corresponding value. >> >> >> kind Indicates the type, or kind, of tag. Its value >> is either one of the corresponding one-letter >> flags described under the various --<LANG>-kinds >> >> >> >> Darren Hiebert Last change: Version 5.7 19 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> options above, or a full name. It is permitted >> (and is, in fact, the default) for the key por- >> tion of this field to be omitted. The optional >> behaviors are controlled with the --fields >> option. >> >> >> implementation >> When present, this indicates a limited implemen- >> tation (abstract vs. concrete) of a routine or >> class, where value is specific to the language >> ("virtual" or "pure virtual" for C++; "abstract" >> for Java). >> >> >> inherits When present, value. is a comma-separated list >> of classes from which this class is derived >> (i.e. inherits from). >> >> >> signature When present, value is a language-dependent >> representation of the signature of a routine. A >> routine signature in its complete form specifies >> the return type of a routine and its formal >> argument list. This extension field is presently >> supported only for C-based languages and does >> not include the return type. >> >> >> In addition, information on the scope of the tag definition >> may be available, with the key portion equal to some >> language-dependent construct name and its value the name >> declared for that construct in the program. This scope entry >> indicates the scope in which the tag was found. For example, >> a tag generated for a C structure member would have a scope >> looking like "struct:myStruct". >> >> >> >> HOW TO USE WITH VI >> Vi will, by default, expect a tag file by the name "tags" in >> the current directory. Once the tag file is built, the fol- >> lowing commands exercise the tag indexing feature: >> >> vi -t tag Start vi and position the cursor at the file and >> line where "tag" is defined. >> >> :ta tag Find a tag. >> >> Ctrl-] Find the tag under the cursor. >> >> Ctrl-T Return to previous location before jump to tag >> >> >> >> Darren Hiebert Last change: Version 5.7 20 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> (not widely implemented). >> >> >> >> HOW TO USE WITH GNU EMACS >> Emacs will, by default, expect a tag file by the name "TAGS" >> in the current directory. Once the tag file is built, the >> following commands exercise the tag indexing feature: >> >> M-x visit-tags-table <RET> FILE <RET> >> Select the tag file, "FILE", to use. >> >> M-. [TAG] <RET> >> Find the first definition of TAG. The default tag >> is the identifier under the cursor. >> >> M-* Pop back to where you previously invoked "M-.". >> >> C-u M-. Find the next definition for the last tag. >> >> >> For more commands, see the Tags topic in the Emacs info >> document. >> >> >> >> HOW TO USE WITH NEDIT >> NEdit version 5.1 and later can handle the new extended tag >> file format (see --format). To make NEdit use the tag file, >> select "File->Load Tags File". To jump to the definition for >> a tag, highlight the word, the press Ctrl-D. NEdit 5.1 can >> can read multiple tag files from different directories. >> Setting the X resource nedit.tagFile to the name of a tag >> file instructs NEdit to automatically load that tag file at >> startup time. >> >> >> >> CAVEATS >> Because ctags is neither a preprocessor nor a compiler, use >> of preprocessor macros can fool ctags into either missing >> tags or improperly generating inappropriate tags. Although >> ctags has been designed to handle certain common cases, this >> is the single biggest cause of reported problems. In partic- >> ular, the use of preprocessor constructs which alter the >> textual syntax of C can fool ctags. You can work around many >> such problems by using the -I option. >> >> Note that since ctags generates patterns for locating tags >> (see the --excmd option), it is entirely possible that the >> wrong line may be found by your editor if there exists >> another source line which is identical to the line >> >> >> >> Darren Hiebert Last change: Version 5.7 21 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> containing the tag. The following example demonstrates this >> condition: >> >> int variable; >> >> /* ... */ >> void foo(variable) >> int variable; >> { >> /* ... */ >> } >> >> Depending upon which editor you use and where in the code >> you happen to be, it is possible that the search pattern may >> locate the local parameter declaration in foo() before it >> finds the actual global variable definition, since the lines >> (and therefore their search patterns are identical). This >> can be avoided by use of the --excmd=n option. >> >> >> >> BUGS >> Ctags has more options than ls(1). >> >> When parsing a C++ member function definition (e.g. >> "className::function"), ctags cannot determine whether the >> scope specifier is a class name or a namespace specifier and >> always lists it as a class name in the scope portion of the >> extension fields. Also, if a C++ function is defined outside >> of the class declaration (the usual case), the access >> specification (i.e. public, protected, or private) and >> implementation information (e.g. virtual, pure virtual) con- >> tained in the function declaration are not known when the >> tag is generated for the function definition. It will, how- >> ever be available for prototypes (e.g --c++-kinds=+p). >> >> No qualified tags are generated for language objects inher- >> ited into a class. >> >> >> >> ENVIRONMENT VARIABLES >> CTAGS If this environment variable exists, it will be >> expected to contain a set of default options which >> are read when ctags starts, after the configuration >> files listed in FILES, below, are read, but before >> any command line options are read. Options appearing >> on the command line will override options specified >> in this variable. Only options will be read from >> this variable. Note that all white space in this >> variable is considered a separator, making it impos- >> sible to pass an option parameter containing an >> >> >> >> Darren Hiebert Last change: Version 5.7 22 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> embedded space. If this is a problem, use a confi- >> guration file instead. >> >> >> ETAGS Similar to the CTAGS variable above, this variable, >> if found, will be read when etags starts. If this >> variable is not found, etags will try to use CTAGS >> instead. >> >> >> TMPDIR On Unix-like hosts where mkstemp() is available, the >> value of this variable specifies the directory in >> which to place temporary files. This can be useful >> if the size of a temporary file becomes too large to >> fit on the partition holding the default temporary >> directory defined at compilation time. ctags >> creates temporary files only if either (1) an >> emacs-style tag file is being generated, (2) the tag >> file is being sent to standard output, or (3) the >> program was compiled to use an internal sort algo- >> rithm to sort the tag files instead of the the sort >> utility of the operating system. If the sort utility >> of the operating system is being used, it will gen- >> erally observe this variable also. Note that if >> ctags is setuid, the value of TMPDIR will be >> ignored. >> >> >> >> FILES >> /ctags.cnf (on MSDOS, MSWindows only) >> /etc/ctags.conf >> /usr/local/etc/ctags.conf >> $HOME/.ctags >> $HOME/ctags.cnf (on MSDOS, MSWindows only) >> .ctags >> ctags.cnf (on MSDOS, MSWindows only) >> If any of these configuration files exist, each will be >> expected to contain a set of default options which are >> read in the order listed when ctags starts, but before >> the CTAGS environment variable is read or any command >> line options are read. This makes it possible to set up >> site-wide, personal or project-level defaults. It is >> possible to compile ctags to read an additional confi- >> guration file before any of those shown above, which >> will be indicated if the output produced by the --ver- >> sion option lists the "custom-conf" feature. Options >> appearing in the CTAGS environment variable or on the >> command line will override options specified in these >> files. Only options will be read from these files. Note >> that the option files are read in line-oriented mode in >> which spaces are significant (since shell quoting is >> >> >> >> Darren Hiebert Last change: Version 5.7 23 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> not possible). Each line of the file is read as one >> command line parameter (as if it were quoted with sin- >> gle quotes). Therefore, use new lines to indicate >> separate command-line arguments. >> >> >> tags The default tag file created by ctags. >> >> TAGS The default tag file created by etags. >> >> >> SEE ALSO >> The official Exuberant Ctags web site at: >> >> http://ctags.sourceforge.net >> >> Also ex(1), vi(1), elvis, or, better yet, vim, the official >> editor of ctags. For more information on vim, see the VIM >> Pages web site at: >> >> http://www.vim.org/ >> >> >> >> AUTHOR >> Darren Hiebert <dhiebert at users.sourceforge.net> >> http://DarrenHiebert.com/ >> >> >> >> MOTIVATION >> "Think ye at all times of rendering some service to every >> member of the human race." >> >> "All effort and exertion put forth by man from the fullness >> of his heart is worship, if it is prompted by the highest >> motives and the will to do service to humanity." >> >> -- From the Baha'i Writings >> >> >> >> CREDITS >> This version of ctags was originally derived from and >> inspired by the ctags program by Steve Kirkendall >> <kirkenda at cs.pdx.edu> that comes with the Elvis vi clone >> (though virtually none of the original code remains). >> >> Credit is also due Bram Moolenaar <Bram at vim.org>, the author >> of vim, who has devoted so much of his time and energy both >> to developing the editor as a service to others, and to >> helping the orphans of Uganda. >> >> >> >> Darren Hiebert Last change: Version 5.7 24 >> >> >> >> >> >> >> Exuberant Ctags CTAGS(1) >> >> >> >> The section entitled "HOW TO USE WITH GNU EMACS" was shame- >> lessly stolen from the info page for GNU etags. >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> Darren Hiebert Last change: Version 5.7 25 >> >> >> > -- blu "Murderous organizations have increased in size and scope; they are more daring, they are served by the most terrible weapons offered by modern science, and the world is nowadays threatened by new forces which, if recklessly unchained, may some day wreck universal destruction." - Arthur Griffith, 1898 ---------------------------------------------------------------------- Brian Utterback - Solaris RPE, Sun Microsystems, Inc. Ph:877-259-7345, Em:brian.utterback-at-ess-you-enn-dot-kom
