macros

问题 I am trying to implement a basic nested loop in CL, but the Loop macro is resisting this. Basically, I would like to find all possible products of 3-digit numbers and accumulate them into a list. Here is my attempt: (loop for x downfrom 999 to 998 do (loop for y downfrom 999 to 998 collect (* x y))) The code above returns NIL for some reason. By the way, I realize that I only run down to 998, but this is done for testing purposes. What could I do to obtain a list like this: (999*999 999*998 .

问题 I would like to know how to detect the keyboard adapter on Windows when using two keyboards, that a key eg. W was pressed on first or on the second keyboard. Can anybody help me how to do it? I would like to use a cheap solution for macros. I would plan to bind macros for entrie second keyboard, when somebody press key W (just for example), keybaord would type a world uint8_t. 来源： https://stackoverflow.com/questions/61139696/c-getting-keyboard-adapter-when-using-two-keyboards-determine-where

问题 I would need something like this. Once I create a folder within a project. A React Project for example. I could select that folder and run some kind of macro or series of actions that would do this. Provided that the name of the folder is Component for example, when the macro would be played it would do this: Create a file with the name, Component.js that would have some kind of snippet default content. Create a file with the name, Component.styled.js which again would have in it some kind of

问题 I want to implement a macro named PRINT which gets zero or more parameters, and does the following: If it gets zero parameters - do nothing. If it gets one or more arguments - act like printf. I succeed in implementing it as you can see in my code below, but only at the cost of calling to printf with an empty string in the case we get zero arguments. Is there a way I can handle the zero arguments case without calling to printf (it's not efficient to print something when you just want to do

问题 I want to implement a macro named PRINT which gets zero or more parameters, and does the following: If it gets zero parameters - do nothing. If it gets one or more arguments - act like printf. I succeed in implementing it as you can see in my code below, but only at the cost of calling to printf with an empty string in the case we get zero arguments. Is there a way I can handle the zero arguments case without calling to printf (it's not efficient to print something when you just want to do

问题 I want to implement a macro named PRINT which gets zero or more parameters, and does the following: If it gets zero parameters - do nothing. If it gets one or more arguments - act like printf. I succeed in implementing it as you can see in my code below, but only at the cost of calling to printf with an empty string in the case we get zero arguments. Is there a way I can handle the zero arguments case without calling to printf (it's not efficient to print something when you just want to do

问题 I want to implement a macro named PRINT which gets zero or more parameters, and does the following: If it gets zero parameters - do nothing. If it gets one or more arguments - act like printf. I succeed in implementing it as you can see in my code below, but only at the cost of calling to printf with an empty string in the case we get zero arguments. Is there a way I can handle the zero arguments case without calling to printf (it's not efficient to print something when you just want to do

问题 I want to implement a macro named PRINT which gets zero or more parameters, and does the following: If it gets zero parameters - do nothing. If it gets one or more arguments - act like printf. I succeed in implementing it as you can see in my code below, but only at the cost of calling to printf with an empty string in the case we get zero arguments. Is there a way I can handle the zero arguments case without calling to printf (it's not efficient to print something when you just want to do

问题 I want to implement a macro named PRINT which gets zero or more parameters, and does the following: If it gets zero parameters - do nothing. If it gets one or more arguments - act like printf. I succeed in implementing it as you can see in my code below, but only at the cost of calling to printf with an empty string in the case we get zero arguments. Is there a way I can handle the zero arguments case without calling to printf (it's not efficient to print something when you just want to do

问题 I'm trying to pass the parameters to macro SETBIT with another predefined macro like this: #define SETBIT(ADDRESS,BIT,N) {(N) ? (ADDRESS &= ~(1<<BIT)) : (ADDRESS |= (1<<BIT))} #define DAC_SYNC PORTB,3,POS SETBIT(DAC_SYNC); However I receiver error: macro SETBIT requires 3 parameters only 1 given There is an article with the following recommendations: to prevent misnesting of arithmetic operations: #define foo (a,b) or #define bar(x) lose((x)) But even though I still have an error. BTW,