Nim offsetof

Author: dmxh

August undefined, 2024

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.

The V Programming Language

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 … WebbGolang Offsetof - 30 examples found. These are the top rated real world Golang examples of unsafe.Offsetof extracted from open source projects. You can rate examples to help us improve the quality of examples. Programming Language: Golang Namespace/Package Name: unsafe Method/Function: Offsetof Examples at hotexamples.com: 30 Example … coffin path

Nim – Wikipedia

http://ncm.gu.se/pdf/namnaren/4649_90_3-4.pdf 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 }} … 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 … coffin paper template

Köp NIM från WidForss

Webb26 juni 2013 · 而__builtin_offsetof ()宏就是在编译器中已经设计好了的函数，直接调用即可。. 明白了这个区别后，下面的代码很好理解。. __compiler_offsetof来确认编译器中是否内建了功能同offsetof ()宏一样的宏。. 若已经内建了这样的宏，则 offsetof ()就是使用这个内建宏__compiler ... 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. coffin party favorsWebb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 … coffin pedestal

"Webb28 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.) " - Nim offsetof

Nim offsetof

Webb16 juli 2011 · offsetof ( type, member-designator) which expands to an integral constant expression that has type size_t, the value of which is the offset in bytes, to the structure member (designated by member-designator ), from the beginning of its structure (designated by type ). Using the offsetof macro does not invoke undefined behavior. 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 . …

Did you know?

http://ncm.gu.se/pdf/namnaren/4649_90_3-4.pdf Webb18 feb. 2024 · The offset of the first member of a standard-layout type is always zero ( empty-base optimization is mandatory). (since C++11) offsetof cannot be implemented …

Webb16 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 … 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 …

Webb19 okt. 2024 · My desired usecase is actually more complex I'm trying to get offsetOf (Foo, bars [4].blop) so ideally offsetOf would support returning the offset of any child of any base. type Bar = object bop: uint8 blop: uint8 type Foo = object baz: uint8 bars: array [ 4, Bar ] bar: Bar var foo: Foo let offset = ( cast [ int ] ( addr (foo. bars [ 3 ].blop ... 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 …

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 …

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 ... coffin peakWebb17 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 … coffin permitWebb27 nov. 2024 · C 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。 /* * 参数： type -- 这是一个 class 类型，其中，member-designator 是一个有效的成员指示器。 * member-designator -- 这是一个 … coffin pfpWebb6 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 … coffin pcWebbC 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 … coffin openWebb9 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 … coffin pet bedWebbThe macro offsetof () returns the offset of the field member from the start of the structure type . This macro is useful because the sizes of the fields that compose a structure can vary across implementations, and compilers may insert different numbers of … coffin people