Strukt | C-style structs on the JVM | Reflection library
kandi X-RAY | Strukt Summary
kandi X-RAY | Strukt Summary
C-style structs on the JVM!. ZERO garbage, ZERO reflection, ZERO code generation. EASY to use, and with INCREDIBLE performance.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Strukt
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Strukt Examples and Code Snippets
Lines of Code : 19License : Permissive (Apache-2.0)
CopyBenchmark Mode Cnt Score Error Units
HeapRead.read thrpt 434769304.174 ops/s
PointedRead.read thrpt 372296437.498 ops/s
public interface Point extends Strukt {
Strukts points = Strukts.elastic(Point.class);
IntField x = points.intField(0);
IntField y = points.intField(0, ThreadSafeType.VOLATILE);
static long allocate() {
return points.allocate();
}
}
lo object Points : ElasticStrukts(Point::class) {
val x by 0
val y by 0
}
enum class Type { DEFAULT, SPECIAL }
object Points : ElasticStrukts(Point::class) {
val x by 0
val y by 0
val type by Type.DEFAULT
}
Community Discussions
Trending Discussions on Strukt
QUESTION
I am trying to access a struct defined in one c file from another c file. The issue is that I cannot use the extern keyword nor can I defined the struct in the header file. How do I access the struct defined in abstract.c inside use_abstract.c? Here is a minimally producible example:
abstract.c
...ANSWER
Answered 2021-Jan-21 at 18:21There are a few ways of tackling this particular issue, depending on what you're trying to do.
First, your code seems to be conflating the structure name struct s_strukt with the typedef name strukt. In general, the typedef would live in abstract.h, where it would be available to both client code and to the implementation in abstract.c (and I think that, in general, having a type name that is one letter different from -- and pronounced the same -- as an existing C keyword is going to lead to confusion and dismay).
If your goal is clear separation between interface and implementation, you can use what are called "opaque structures". This is what you get when you have a type that references a structure the definition of which isn't visible to the calling code (for example, the FILE type used by fopen/fclose/read/write, etc).
In abstract.h, you would have:
QUESTION
I have the following:
abstract.h
...ANSWER
Answered 2021-Jan-21 at 14:33You have to declare your ("public") structs in your headers and include those headers in the source where you're using it. Here your use_abstract.c only knows that there is a struct called s_strukt that exists by including "abstract.h", but it doesn't know any of its fields.
And one more thing, use either one of these typedef in your header (both are the same) not both at the same time.
QUESTION
I want the Set method below to set the APtr field of a passed in B struct to a value that gets passed in by value, i.e. without a pointer indirection.
For that to work via go reflection, I will probably have to copy that value to a new location that I have the address of? Either way, how can I get this to work? What I have is a working version for non-pointers values.
...ANSWER
Answered 2019-Aug-30 at 06:03func Set(strukt interface{}, fieldName string, newFieldValue interface{}) {
struktValueElem := reflect.ValueOf(strukt).Elem()
field := struktValueElem.FieldByName(fieldName)
newFieldValueValue := reflect.ValueOf(newFieldValue)
if field.Kind() == reflect.Ptr {
rt := field.Type() // type *A
rt = rt.Elem() // type A
rv := reflect.New(rt) // value *A
el := rv.Elem() // value A (addressable)
el.Set(newFieldValueValue) // el is addressable and has the same type as newFieldValueValue (A), Set can be used
field.Set(rv) // field is addressable and has the same type as rv (*A), Set can be used
} else { // not a pointer? more straightforward:
field.Set(newFieldValueValue)
}
}
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