如果你使用一个简单的正则表达式解析器,那么扩展Exuberant Ctags以支持另一种语言是一项相当简单的练习.
例如,下面是从Exuberant Ctags解析器页面获取的正则表达式解析器的示例:
/***************************************************************************
* make.c
* Regex-based parser for makefile macros
**************************************************************************/
/* INCLUDE FILES */
#include "general.h" /* always include first */
#include "parse.h" /* always include */
/* FUNCTION DEFINITIONS */
static void installMakefileRegex (const langType language)
{
addTagRegex (language, "(^|[ \t])([A-Z0-9_]+)[ \t]*:?=", "\\2", "m,macro", "i");
}
/* Create parser definition stucture */
extern parserDefinition* MakefileParser (void)
{
static const char *const patterns [] = { "[Mm]akefile", NULL };
static const char *const extensions [] = { "mak", NULL };
parserDefinition* const def = parserNew ("Makefile");
def->patterns = patterns;
def->extensions = extensions;
def->initialize = installMakefileRegex;
def->regex = TRUE;
return def;
}
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