C语言 # is not followed by a macro parameter
WebIt has enhanced features of cpp (or may be cpp is a scaled down version of m4). Specially, it has better support for multi-line macros. It continue to be used in various packages. Worth mentioning that adding a code generation to your code will make it more complex to maintain/debug. define (`CHECK_MACRO', ` #ifdef $1 printf ("defined #$1\n ... Webc c-preprocessor error: '#' is not followed by a macro parameter 我正在尝试编写一个宏，该宏为C中任何给定的对象类生成对象池代码。 每当我运行预处理器 时，我都会不断 …
C语言 # is not followed by a macro parameter
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WebMay 25, 2013 · unless preceded by a # or ## preprocessing token or followed by a ## preprocessing token (see below) : #param, ##param, param## In the invocation NAME (mine), the argument is 'mine'; it is fully expanded to 'mine'; it is then substituted into the replacement string: EVALUATOR(mine, VARIABLE) <-- #define NAME ( fun) … WebGenerally speaking, the solution is to turn that inside out: use conditional directives to define the macro differently in different cases. That will not work for a generic macro-test …
WebMar 25, 2006 · C++ and C). By definition a macro (the part after the #define) ends on the same line. This can be partially ameliorated by the use of continuation lines (where the last character on the physical line is a '\'). You CANNOT put preprocessing conditionals inside a macro, because they have to start a line, and you can't get there without ending the ... WebThis is true even if the macro encloses the parameters in parentheses to prevent expansion from breaking anything. int oops = 5; double incremental_damage = AREA (oops++); // Compiler sees: double incremental_damage = …
WebAug 2, 2024 · The preprocessor expands macros in all lines except preprocessor directives, lines that have a # as the first non-white-space character. It expands macros in parts of some directives that aren't skipped as part of a conditional compilation. Conditional compilation directives allow you to suppress compilation of parts of a source file. WebAug 2, 2024 · The macro name is replaced by a copy of the macro body. If the macro accepts arguments, the actual arguments following the macro name are substituted for …
WebThis type is defined in stdarg.h header file. Use int parameter and va_start macro to initialize the va_list variable to an argument list. The macro va_start is defined in stdarg.h header file. Use va_arg macro and va_list variable to access each item in argument list. Use a macro va_end to clean up the memory assigned to va_list variable.
rawalpindi to goth machhiWebFeb 3, 2024 · You can do the same thing by using any second value in the #define ID_x macros, as long as there is one; the real parameters can be added to REQ_ENTRY. But it takes some extra juggling. 其他推荐答案. It's a pity that the defined operator is available only in the context of #if and #ifelse, but not for macro expansions. rawalpindi to karachi train ticket priceWebNov 16, 2012 · You need a space between the first backslash and the macro name, otherwise you are defining a macro called TSMP_PROV_VAL_PRINT_DFT_IN_PARAMSTSMP_PRINT_MSISDN with provDet.subsInfo.msisdn as a parameter. standard grep question. "The parameter list is … rawalpindi today weatherWebWhen a macro is expanded, the two tokens on either side of each ‘##’ operator are combined into a single token, which then replaces the ‘##’ and the two original tokens in … rawalpindi to lahore busWebThe invocation of the macro need not be restricted to a single logical line--it can cross as many lines in the source file as you wish. The number of arguments you give must match the number of parameters in the macro definition. When the macro is expanded, each use of a parameter in its body is replaced by the tokens of the corresponding argument. rawalpindi to lahore bus ticket priceWebNov 27, 2024 · 但是，出现编译器错误： error:"*" may not appear in macro parameter list 我只是好奇如果删除" *"会发生什么，这会导致错误"宏参数必须用逗号分隔"。 关于我在这里做错的任何想法吗？ 据我所知，至少在C语言中，没有键入宏参数。 全部是符号替换。 只需使用 pReporter 而不是 Reporter * pReporter 或 Reporter pReporter 。 (我想您的宏的其 … rawalpindi to kohat bus serviceWeberror C2010: 'character' : unexpected in macro formal parameter list 中文对照：（编译错误）带参宏的形式参数表中出现未知字符 分析：例如“#define s (r ) r*r”中参数多了一个字符‘ ’ error C2014: preprocessor command must start as first nonwhite space 中文对照：（编译错误）预处理命令前面只允许空格 分析：每一条预处理命令都应独占一行，不应出现其他 … rawalpindi to sialkot bus service