我正在尝试使用带有VIM的ctags,而且我是两者的新手.为了测试ctags有用的程度,我决定通过一个非常简单的测试,即解析/usr/include中的头文件,以便我可以自动完成一些非常基本的功能.
当我运行命令
ctags --c++-kinds=+p --fields=+iaS -f ~/.tags/tags /usr/include/*.h
然后输出打印
BUFSIZ /usr/include/stdio.h 108;" d EOF /usr/include/stdio.h 115;" d FILE /usr/include/stdio.h /^typedef struct _IO_FILE FILE;$/;" t typeref:struct:_IO_FILE FSETLOCKING_BYCALLER /usr/include/stdio_ext.h /^ FSETLOCKING_BYCALLER$/;" e enum:__anon122 FSETLOCKING_BYCALLER /usr/include/stdio_ext.h 39;" d FSETLOCKING_INTERNAL /usr/include/stdio_ext.h /^ FSETLOCKING_INTERNAL,$/;" e enum:__anon122 FSETLOCKING_INTERNAL /usr/include/stdio_ext.h 36;" d FSETLOCKING_QUERY /usr/include/stdio_ext.h /^ FSETLOCKING_QUERY = 0,$/;" e enum:__anon122 FSETLOCKING_QUERY /usr/include/stdio_ext.h 32;" d P_tmpdir /usr/include/stdio.h 128;" d SEEK_CUR /usr/include/stdio.h 122;" d SEEK_END /usr/include/stdio.h 123;" d SEEK_SET /usr/include/stdio.h 121;" d _IOFBF /usr/include/stdio.h 101;" d _IOLBF /usr/include/stdio.h 102;" d _IONBF /usr/include/stdio.h 103;" d _IO_STdio /usr/include/libio.h 165;" d _IO_STdio_H /usr/include/libio.h 30;" d _OLD_STdio_MAGIC /usr/include/libio.h 121;" d _STdio_EXT_H /usr/include/stdio_ext.h 24;" d _STdio_H /usr/include/stdio.h 27;" d _STdio_USES_IOSTREAM /usr/include/stdio.h 73;" d _VA_LIST_DEFINED /usr/include/stdio.h 81;" d __FILE /usr/include/stdio.h /^typedef struct _IO_FILE __FILE;$/;" t typeref:struct:_IO_FILE __FILE_defined /usr/include/stdio.h 57;" d ____FILE_defined /usr/include/stdio.h 67;" d __need_FILE /usr/include/stdio.h 37;" d __need_FILE /usr/include/stdio.h 59;" d __need_NULL /usr/include/stdio.h 33;" d __need___FILE /usr/include/stdio.h 38;" d __need___FILE /usr/include/stdio.h 69;" d __need_getopt /usr/include/stdio.h 902;" d __need_size_t /usr/include/stdio.h 32;" d __wur /usr/include/stdio.h /^ _IO_cookie_io_functions_t __io_funcs) __THROW __wur;$/;" v __wur /usr/include/stdio.h /^ __THROW __attribute__ ((__format__ (__printf__,2,0))) __wur;$/;" v __wur /usr/include/stdio.h /^ __THROW __attribute__ ((__format__ (__printf__,3))) __wur;$/;" v __wur /usr/include/stdio.h /^ __THROW __attribute_malloc__ __wur;$/;" v __wur /usr/include/stdio.h /^ __THROW __wur;$/;" v __wur /usr/include/stdio.h /^extern FILE *fdopen (int __fd,__const char *__modes) __THROW __wur;$/;" v __wur /usr/include/stdio.h /^extern FILE *open_memstream (char **__bufloc,size_t *__sizeloc) __THROW __wur;$/;" v __wur /usr/include/stdio.h /^extern char *tmpnam (char *__s) __THROW __wur;$/;" v __wur /usr/include/stdio.h /^extern char *tmpnam_r (char *__s) __THROW __wur;$/;" v __wur /usr/include/stdio.h /^extern int feof (FILE *__stream) __THROW __wur;$/;" v __wur /usr/include/stdio.h /^extern int feof_unlocked (FILE *__stream) __THROW __wur;$/;" v __wur /usr/include/stdio.h /^extern int ferror (FILE *__stream) __THROW __wur;$/;" v __wur /usr/include/stdio.h /^extern int ferror_unlocked (FILE *__stream) __THROW __wur;$/;" v __wur /usr/include/stdio.h /^extern int fileno (FILE *__stream) __THROW __wur;$/;" v __wur /usr/include/stdio.h /^extern int fileno_unlocked (FILE *__stream) __THROW __wur;$/;" v __wur /usr/include/stdio.h /^extern int ftrylockfile (FILE *__stream) __THROW __wur;$/;" v _flushlbf /usr/include/stdio_ext.h /^extern void _flushlbf (void);$/;" p signature:(void) cuserid /usr/include/stdio.h /^extern char *cuserid (char *__s);$/;" p signature:(char *__s) dprintf /usr/include/stdio.h /^extern int dprintf (int __fd,__const char *__restrict __fmt,...)$/;" p signature:(int __fd,...) fclose /usr/include/stdio.h /^extern int fclose (FILE *__stream);$/;" p signature:(FILE *__stream) fcloseall /usr/include/stdio.h /^extern int fcloseall (void);$/;" p signature:(void) fflush /usr/include/stdio.h /^extern int fflush (FILE *__stream);$/;" p signature:(FILE *__stream) fflush_unlocked /usr/include/stdio.h /^extern int fflush_unlocked (FILE *__stream);$/;" p signature:(FILE *__stream) fgetc /usr/include/stdio.h /^extern int fgetc (FILE *__stream);$/;" p signature:(FILE *__stream) fgetc_unlocked /usr/include/stdio.h /^extern int fgetc_unlocked (FILE *__stream);$/;" p signature:(FILE *__stream) fgetpos /usr/include/stdio.h /^extern int fgetpos (FILE *__restrict __stream,fpos_t *__restrict __pos);$/;" p signature:(FILE *__restrict __stream,fpos_t *__restrict __pos) fgetpos64 /usr/include/stdio.h /^extern int fgetpos64 (FILE *__restrict __stream,fpos64_t *__restrict __pos);$/;" p signature:(FILE *__restrict __stream,fpos64_t *__restrict __pos) fpos64_t /usr/include/stdio.h /^typedef _G_fpos64_t fpos64_t;$/;" t fpos_t /usr/include/stdio.h /^typedef _G_fpos_t fpos_t;$/;" t fprintf /usr/include/stdio.h /^extern int fprintf (FILE *__restrict __stream,$/;" p signature:(FILE *__restrict __stream,__const char *__restrict __format,...) fputc /usr/include/stdio.h /^extern int fputc (int __c,FILE *__stream);$/;" p signature:(int __c,FILE *__stream) fputc_unlocked /usr/include/stdio.h /^extern int fputc_unlocked (int __c,FILE *__stream);$/;" p signature:(int __c,FILE *__stream) fputs /usr/include/stdio.h /^extern int fputs (__const char *__restrict __s,FILE *__restrict __stream);$/;" p signature:(__const char *__restrict __s,FILE *__restrict __stream) fputs_unlocked /usr/include/stdio.h /^extern int fputs_unlocked (__const char *__restrict __s,$/;" p signature:(__const char *__restrict __s,FILE *__restrict __stream) fscanf /usr/include/stdio.h 441;" d fseek /usr/include/stdio.h /^extern int fseek (FILE *__stream,long int __off,int __whence);$/;" p signature:(FILE *__stream,int __whence) fseeko /usr/include/stdio.h /^extern int fseeko (FILE *__stream,__off_t __off,int __whence) fseeko64 /usr/include/stdio.h /^extern int fseeko64 (FILE *__stream,__off64_t __off,int __whence) fsetpos /usr/include/stdio.h /^extern int fsetpos (FILE *__stream,__const fpos_t *__pos);$/;" p signature:(FILE *__stream,__const fpos_t *__pos) fsetpos64 /usr/include/stdio.h /^extern int fsetpos64 (FILE *__stream,__const fpos64_t *__pos);$/;" p signature:(FILE *__stream,__const fpos64_t *__pos) getc /usr/include/stdio.h /^extern int getc (FILE *__stream);$/;" p signature:(FILE *__stream) getc /usr/include/stdio.h 527;" d getc_unlocked /usr/include/stdio.h /^extern int getc_unlocked (FILE *__stream);$/;" p signature:(FILE *__stream) getchar /usr/include/stdio.h /^extern int getchar (void);$/;" p signature:(void) getchar_unlocked /usr/include/stdio.h /^extern int getchar_unlocked (void);$/;" p signature:(void) getw /usr/include/stdio.h /^extern int getw (FILE *__stream);$/;" p signature:(FILE *__stream) jpeg_stdio_dest /usr/include/jpeglib.h /^EXTERN(void) jpeg_stdio_dest JPP((j_compress_ptr cinfo,FILE * outfile));$/;" p signature:(j_compress_ptr cinfo,FILE * outfile) jpeg_stdio_dest /usr/include/jpeglib.h 841;" d jpeg_stdio_src /usr/include/jpeglib.h /^EXTERN(void) jpeg_stdio_src JPP((j_decompress_ptr cinfo,FILE * infile));$/;" p signature:(j_decompress_ptr cinfo,FILE * infile) jpeg_stdio_src /usr/include/jpeglib.h 842;" d pclose /usr/include/stdio.h /^extern int pclose (FILE *__stream);$/;" p signature:(FILE *__stream) perror /usr/include/stdio.h /^extern void perror (__const char *__s);$/;" p signature:(__const char *__s) printf /usr/include/stdio.h /^extern int printf (__const char *__restrict __format,...);$/;" p signature:(__const char *__restrict __format,...) putc /usr/include/stdio.h /^extern int putc (int __c,FILE *__stream);$/;" p signature:(int __c,FILE *__stream) putc /usr/include/stdio.h 569;" d putc_unlocked /usr/include/stdio.h /^extern int putc_unlocked (int __c,FILE *__stream) putchar /usr/include/stdio.h /^extern int putchar (int __c);$/;" p signature:(int __c) putchar_unlocked /usr/include/stdio.h /^extern int putchar_unlocked (int __c);$/;" p signature:(int __c) puts /usr/include/stdio.h /^extern int puts (__const char *__s);$/;" p signature:(__const char *__s) putw /usr/include/stdio.h /^extern int putw (int __w,FILE *__stream);$/;" p signature:(int __w,FILE *__stream) rewind /usr/include/stdio.h /^extern void rewind (FILE *__stream);$/;" p signature:(FILE *__stream) scanf /usr/include/stdio.h 442;" d sscanf /usr/include/stdio.h 443;" d stderr /usr/include/stdio.h 152;" d stdin /usr/include/stdio.h 150;" d stdout /usr/include/stdio.h 151;" d ungetc /usr/include/stdio.h /^extern int ungetc (int __c,FILE *__stream) va_list /usr/include/stdio.h /^typedef _G_va_list va_list;$/;" t vdprintf /usr/include/stdio.h /^extern int vdprintf (int __fd,$/;" p signature:(int __fd,_G_va_list __arg) vfprintf /usr/include/stdio.h /^extern int vfprintf (FILE *__restrict __s,$/;" p signature:(FILE *__restrict __s,_G_va_list __arg) vfscanf /usr/include/stdio.h 500;" d vprintf /usr/include/stdio.h /^extern int vprintf (__const char *__restrict __format,_G_va_list __arg);$/;" p signature:(__const char *__restrict __format,_G_va_list __arg) vscanf /usr/include/stdio.h 501;" d vsscanf /usr/include/stdio.h 502;" d
很明显ctags错过了一些非常明显的函数,比如fopen,但它包含了像fclose这样的函数.当我使用ctags解析时,是否有一些我缺少的选项？
解决方法
在你的ctags命令中添加一个-I__wur,你就会得到你想要的结果.
__wur是__attribute __的一个宏((__ warn_unused_result__))
__wur是__attribute __的一个宏((__ warn_unused_result__))
有关更详尽的解释,请参阅：
http://sourceforge.net/mailarchive/message.php?msg_name=48A7FF60.9080609%40sina.com
