gofield | performance struct field accessor based on unsafe pointers | Reflection library
kandi X-RAY | gofield Summary
kandi X-RAY | gofield Summary
High-performance struct field accessor based on unsafe pointers.
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Top functions reviewed by kandi - BETA
- newStructType returns a new StructType .
- parseStructInfoWithCheck returns the runtime type and value of a struct pointer .
- derefPtrAndInit dereferences a pointer to the given value .
- parseStructInfo takes a struct pointer and returns its runtime type ID and runtime type ID .
- New returns a new Accessor .
- newStruct returns a new empty struct .
- Range calls fn for each field in s .
- WithMaxDeep is an Option to set the maximum number of deep recursively .
- WithGroupBy sets the GroupByFunc option .
- WithIterator allows you to specify the iterator function used to iterate over the iterator .
gofield Key Features
gofield Examples and Code Snippets
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QUESTION
I would like to produce a rose tree representation (called Header in the following) of a data type using generics-sop, but I got stuck at one detail; specifically, how to pass type information "one level down" within the implementation of mkAnonProd
such that when unpacking anonymous records the right instances of HasHeader
for the field types can be picked rather than the unit type.
In the following I have pasted my own code, some test datatypes and a GHCi session that illustrates the current and desired behaviour.
...ANSWER
Answered 2020-Oct-16 at 21:58Use hcpure
to call hasHeader
for each field.
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