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Clarify documentation around what constructors do (#1125) 

The wording of the documentation is slightly misleading. Before this
commit, it says that the returned collectors are "already registered".
This could be interpreted in two ways, one could think that promauto
keeps some sort of cache of already registered Collectors that are
returned by this package, and the other way is that the Collectors
constructed are registered before being returned. What is actually
happening is the latter, and the wording after this PR leaves no room to
think that the former could be the case.

Signed-off-by: Rafael Franco <me@rafaelfranco.es>

Signed-off-by: Rafael Franco <me@rafaelfranco.es>
This commit is contained in:
Rafael Franco 2022-09-12 10:17:56 +01:00 committed by GitHub
parent 83d56b1144
commit 7c46c150bd
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1 changed files with 7 additions and 7 deletions
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14
prometheus/promauto/auto.go
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@ -14,13 +14,13 @@
// Package promauto provides alternative constructors for the fundamental // Package promauto provides alternative constructors for the fundamental
// Prometheus metric types and their …Vec and …Func variants. The difference to // Prometheus metric types and their …Vec and …Func variants. The difference to
// their counterparts in the prometheus package is that the promauto // their counterparts in the prometheus package is that the promauto
// constructors return Collectors that are already registered with a // constructors register the Collectors with a registry before returning them.
// registry. There are two sets of constructors. The constructors in the first // There are two sets of constructors. The constructors in the first set are
// set are top-level functions, while the constructors in the other set are // top-level functions, while the constructors in the other set are methods of
// methods of the Factory type. The top-level function return Collectors // the Factory type. The top-level function return Collectors registered with
// registered with the global registry (prometheus.DefaultRegisterer), while the // the global registry (prometheus.DefaultRegisterer), while the methods return
// methods return Collectors registered with the registry the Factory was // Collectors registered with the registry the Factory was constructed with. All
// constructed with. All constructors panic if the registration fails. // constructors panic if the registration fails.
// //
// The following example is a complete program to create a histogram of normally // The following example is a complete program to create a histogram of normally
// distributed random numbers from the math/rand package: // distributed random numbers from the math/rand package: