/*
* 宏的数字变成字符串
* 1. 宏中的#的功能是将其后面的宏参数进行字符串化操作（Stringizing operator）
* 简单说就是在它引用的宏变量的左右各加上一个双引号
* 2. #@是加单引号（Charizing Operator）gcc/clang并不支持它
* 3. 宏中遇到#或##时就不会再展开宏中嵌套的宏了, 需要使用一个中间转换宏达到展开宏的目的
* 4. ##的功能，它可以拼接符号（Token-pasting operator）
*/
static void macro_as_part_of_string(void)
{
#define CONFIG_BAUDRATE 2000000
#define __STRING(x) #x /* (#x) is invalid */
#define STRING(x) __STRING(x)
#define BOOTARGS_CONSOLE "console=ttyS3,"STRING(CONFIG_BAUDRATE)"n8 "
printf("%s\n", BOOTARGS_CONSOLE);
char *pChar = "hello";
char *pChar2 = __STRING(hello); /* hello -> "hello" */
if(!strcmp(pChar, pChar2)) {
printf("pChar:%s is equal to pChar2:%s\n", pChar, pChar2);
}
/* gcc/clang not support #@
#define TOCHAR(x) #@x
char c = TOCHAR(A);
printf("c is %c\n", c);
*/
printf("%s\n", __STRING(__FILE__));
printf("%s\n", STRING(__FILE__));
#define paster(n) printf("token"#n" = %d\n", token##n)
int token9 = 100;
paster(9);
#define WIDEN2(x) L##x
#define WIDEN(x) WIDEN2(x)
#define __WFILE__ WIDEN(__FILE__)
printf("%s\n", /*L*/"hello");
}
/*!
Inserts the copied data into the given node.
\note The mime-type for the data must be <tt>"application/x-qt-bauhaus"</tt>, otherwise the paste will fail.
\param transferData The clip-board contents to paste.
\param intoNode The node into which the clip-board contents are to be pasted.
\return true if successful, false otherwise.
*/
bool ModelRewriter::paste(QMimeData *transferData, const InternalNode::Pointer &intoNode)
{
if (!transferData)
return false;
if (intoNode.isNull() || !intoNode->isValid())
throw InvalidModelNodeException(__LINE__, Q_FUNC_INFO, __FILE__);
Paster paster(transferData, intoNode);
if (paster.doPaste(m_modelToTextMerger)) {
if (!modificationGroupActive()) {
m_modelToTextMerger.applyChanges(*m_textModifier);
}
return true;
} else {
m_modelToTextMerger.clear();
return false;
}
}
bool menu()
{
int a = 0;
while(a != 2)
{
printf("****************************************** \n");
printf("** 1 - paster ** \n");
printf("** 2 - exit ** \n");
printf("****************************************** \n");
printf("Please enter the number for the command \n");
scanf("%d", &a);
switch(a)
{
case 1: paster();
break;
default: printf("Please enter an available number for a command!");
break;
}
}
return 0;
};
int main(){
int token9 = 9;
paster(9);
return 0;
}
