2024 Nim offsetof

Nim offsetof

Author: lzon

August undefined, 2024

WebbSlutspelet i Nim lämnar lika många tändstickor i varje hög åt motspelaren. Till sist når man följande slutläge: Den som står i tur att dra har förlorat oavsett om man spelar Nim eller … WebbC's offsetof() macro is an ANSI C library feature found in stddef.h. It evaluates to the offset (in bytes) of a given member within a struct or union type, an expression of type size_t . …

offsetof - cppreference.com

http://ncm.gu.se/pdf/namnaren/4649_90_3-4.pdf WebbThe compiler depends on the System module to work properly and the System module depends on the compiler. Most of the routines listed here use special compiler magic. … knoxville events march

C 库宏 – offsetof() 菜鸟教程

Webb18 feb. 2024 · It is specified in C23 that defining a new type in offsetof is undefined behavior, and such usage is only partially supported by some implementations in C++ modes: offsetof(struct Foo { int a; }, a) is supported by ICC and some old versions of GCC, while offsetof(struct Foo { int a, b; }, a) is rejected by all known implementations … Webb23 okt. 2024 · I'm not entirely familiar with offsetof and what protobuf depends on them for. It looks like if there was a virtual table or something then offsetof doesn't calculate the correct offset for non-POD types perhaps? It just seems that if the compiler is saying the offsets are not valid, then it could be broken. Webb24 maj 2024 · Can't use offsetOf on object that ends with an UncheckedArray · Issue #11320 · nim-lang/Nim · GitHub nim-lang Nim Sponsor Notifications Fork 1.4k Star 14.3k Pull requests Actions Wiki 1 Insights New issue Can't use offsetOf on object that ends with an UncheckedArray #11320 Closed MortimerSnerd opened this issue on May 24, 2024 … reddit cph grooming

c++ - what is the purpose and return type of the __builtin_offsetof ...

How can I print the offset of a struct member at compile time?

Webb16 sep. 2024 · The compiler will generate a file named SourceFileName .s, and you can use -o Name to give it a different name if desired. Then grep "## offsetof" Name will find this line, showing something like: ## offsetof (struct A, b) = 1. Then you can use sed or other tools to extract the value. WebbPrint offsets of object field in Nim. GitHub Gist: instantly share code, notes, and snippets. Skip to content. All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} … knoxville facebookWebb9 maj 2014 · 在offsetof ()中，这个member成员的地址实际上就是type数据结构中member成员相对于结构变量的偏移量。对于给定一个结构，offsetof (type,member)是一个常量，list_entry ()正是利用这个不变的偏移量来求得链表数据项的变量地址。敬请高手指正。 plgxl 码龄11年暂无认证 0 原创 158万+ 周排名 161万+ 总排名 1496 访问等级 … knoxville explosion softball

"Webb8 jan. 2015 · offsetof (struct mystruct1, u_line.line); However, we can observe that the answer will be zero since mystruct1 contains a union as the first member (and only), … " - Nim offsetof

Nim offsetof

offsetof 和 container_of - william-cheung - 博客园

Webb16 jan. 2013 · #define OFFSET (x) offsetof (struct {\ char param1 [1], param2 [2], param3 [4], param4 [1];\ },x) Then you can use OFFSET (param1), etc. and it's even an integer … WebbNim är ett mycket gammalt sällskapsspel för två deltagare. I spelet använder man sig av exempelvis tändstickor (eller mynt eller små stenar), som läggs i ett valfritt antal högar …

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Webb先来看看offsetof宏是什么，这是定义在中的一个宏，用来计算一个 struct 结构体中某个成员相对于结构体首地址的偏移量。这是一个很有用的宏，因为 Linux … WebbExample template works(pos, member) = echo offsetof(type(pos[]), member) template broken[T](pos: ptr T, member) = echo offsetof(T, member) type O = object f: int var ...

Webboffsetof (s,m)解析. (s *)0 是把0地址转换为s指针类型，然后从这个指针上“取”m成员再取址，而m成员的地址转换后结果就是m成员相对于整个对象的偏移量（我们既然是从0地址开始算的，就不用再减去起始地址0）。. 在嵌入式应用中，或许你对offsetof接触不多甚至 ... Webboffsetof 是定义在头文件 stddef.h (cstddef in C++) 中的一个宏，用于计算结构体 (struct)或联合体 (union) 成员的地址偏移。. 这一实现的原理是如果一个对象的地址为0的话，那么它的数据成员的地址就是数据成员在该对象的内存布局中相对于对象地址的偏移值。. 虽然这 ...

WebbAttempting to use offsetOf on a type fails when used within a procedure inside a static block or assigned to a const. Example type GoodboySave = object checksum: uint32 header: array[8, char] versi... Webb6 mars 2024 · template offsetof * (typ, field): expr = (var dummy: typ; cast [system. int](addr (dummy.field)) - cast [system. int](addr (dummy))) But I think it should be in the …

WebbC 库宏 offsetof (type, member-designator) 会生成一个类型为 size_t 的整型常量，它是一个结构成员相对于结构开头的字节偏移量。成员是由 member-designator 给定的，结构的名称是在 type 中给定的。声明下面是 offsetof () 宏的声明。 offsetof(type, member-designator) 参数 type -- 这是一个 class 类型，其中，member-designator 是一个有效的 …

WebbMyggmedlet är vattenbaserat och ger därför ingen oljig känsla mot huden och skadar inte heller kläder eller plast. Sprayflaskan gör den enkel att applicera och den lätt … knoxville exterior servicesWebb11 mars 2004 · Regardless of the implementation, the offsetof () macro takes two parameters. The first parameter is the structure name; the second, the name of the structure element. (I apologize for using a term as vague as “structure name.”. I'll refine this shortly.) A straightforward use of the macro is shown in Listing 2. knoxville eyeglass worldWebb28 juni 2010 · According to the 1998 ISO C++ standard, applying ‘offsetof’ to a non-POD type is undefined. In existing C++ implementations, however, ‘offsetof’ typically gives meaningful results even when applied to certain kinds of non-POD types. (Such as a simple ‘struct’ that fails to be a POD type only by virtue of having a constructor.) knoxville extended weather forecastWebb維基百科，自由的百科全書. C語言的 offsetof () 巨集，是定義在 stddef.h 。. 用於求出一個 struct 或 union 資料類型的給定成員的 size_t 類型的位元組偏移值。. offsetof () 巨集有兩個參數，分別是結構名與結構內的成員名。. 不能聲明為C原型。. reddit cracked dawsWebb17 mars 2024 · How to get the offset of a nested struct member in C? One solution to print the offset of the checksum field in the info struct, is to use the macros typeof and … knoxville exterior lighting knoxville facebook marketplaceWebb16 maj 2024 · I currently try to implement offsetof, alignof, sizeof as a compile time feature of my compiler ( #5664 ), and in my tests I found out, that the original nim code … knoxville extended stay housing