List * tag_list()
{
List * list = NULL;
if( match( STAG ) )
{
list = make_list( yylval ); //匹配到开始标签
advance();
add_child( list, tag_list() ); //添加孩子
if( strcmp( yylval->tag_name, list->node->tag_name ) != 0 ) //处理标签不匹配问题
{
printf( "发生标签不匹配问题，在.xml文件中%d行的%s标签与在%d行%s标签不匹配！\n",
yylval->lineno, yylval->tag_name, list->node->lineno, list->node->tag_name );
exit( 0 );
}
advance();
add_list( list, tag_list() ); //添加同级标签
}
else if( match( TEXT ) )
{
list = make_list( yylval );
advance();
add_list( list, tag_list() );
}
else if( match( ETAG ) ) //匹配到结束标签 直接返回空
;
return list;
}
tag_list from_string(std::string const &p_string)
{
GstTagList *tag_list_ = gst_tag_list_new_from_string(p_string.c_str());
if (tag_list_ == nullptr)
return tag_list();
else
return tag_list(tag_list_);
}
int main()
{
List * root; /*定义语义树根结点*/
root = tag_list(); /*递归下降分析返回根结点*/
print_tree(0, root); /*打印树到屏幕*/
return 0;
}
term_t heap_cons2(heap_t *hp, term_t head, term_t tail)
{
cons_t *cons;
int gap = sizeof(*cons);
cons = (cons_t *)heap_alloc(hp, gap);
cons->head = head;
cons->tail = tail;
return tag_list(cons);
}
void add_raw_value(tag_list &p_tag_list, GValue const *p_value, std::string const &p_name, GstTagMergeMode const p_merge_mode)
{
g_assert(p_value != NULL);
g_assert(!p_name.empty());
if (p_tag_list.is_empty())
p_tag_list = tag_list(gst_tag_list_new_empty());
gst_tag_list_add_value(p_tag_list.get_tag_list(), p_merge_mode, p_name.c_str(), p_value);
}
