zyppng::log::formatter< T, Enable > Struct Template Reference

Primary trait for object formatting. More...

Detailed Description

template<typename T, typename Enable = void>
struct zyppng::log::formatter< T, Enable >

Primary trait for object formatting.

To support a type T in the log layer, you must provide a specialization of this struct. The specialization is valid if it implements at least one of the two static stream signatures.

The Interface Contract

1. Context-Aware (For SAT Handles/IDs)

static std::ostream& stream(std::ostream& os, const ContextRef& ctx, const T& obj);

Use this for objects that require system state (like a Pool or Config) to be resolved.

2. Context-Independent (For Self-contained Values)

static std::ostream& stream(std::ostream& os, const T& obj);

Use this for objects that own their data (like Arch or Edition).

implementation Example

template <>
struct formatter<sat::SolvableId> {
static std::ostream& stream(std::ostream& os, const ContextRef& ctx, sat::SolvableId id) {
return os << ctx.pool().getName(id);
}
};

Template Parameters

T	The logic type to be formatted.

Note

If both signatures are provided, log::view(ctx, obj) will prioritize the Context-Aware version.

Definition at line 67 of file format.h.

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The documentation for this struct was generated from the following file:

• zypp/ng/log/format.h