Family{C}: use keyword arguments for construction.

src/Prometheus.jl

@@ -381,12 +381,12 @@ struct Family{C} <: Collector
     lock::ReentrantLock
 
     function Family{C}(
-            registry::Union{CollectorRegistry, Nothing},
-            metric_name::String, help::String, labelnames::LabelNames,
+            metric_name::String, help::String, labelnames::Vector{String};
+            registry::Union{CollectorRegistry, Nothing}=DEFAULT_REGISTRY,
         ) where C
         children = Dict{LabelValues, C}()
         lock = ReentrantLock()
-        family = new(metric_name, help, labelnames, children, lock)
+        family = new(metric_name, help, LabelNames(labelnames), children, lock)
         if registry !== nothing
             register(registry, family)
         end
@@ -394,12 +394,6 @@ struct Family{C} <: Collector
     end
 end
 
-function Family{C}(metric_name::String, help::String, labelnames) where C
-    return Family{C}(DEFAULT_REGISTRY, metric_name, help, LabelNames(labelnames))
-end
-function Family{C}(registry::Union{CollectorRegistry, Nothing}, metric_name::String, help::String, labelnames) where C
-    return Family{C}(registry, metric_name, help, LabelNames(labelnames))
-end
 
 function metric_names(family::Family)
     return (family.metric_name, )

test/runtests.jl

@@ -172,8 +172,9 @@ end
     @test c in Prometheus.DEFAULT_REGISTRY.collectors
     r = Prometheus.CollectorRegistry()
     c = Prometheus.Family{Collector}(
-        r, "http_requests", "Number of HTTP requests.",
-        ["endpoint", "status_code"],
+        "http_requests", "Number of HTTP requests.",
+        ["endpoint", "status_code"];
+        registry = r,
     )
     @test c in r.collectors
     @test length(c.children) == 0
@@ -225,8 +226,9 @@ end
 @testset "Prometheus.Family{Summary}" begin
     r = Prometheus.CollectorRegistry()
     c = Prometheus.Family{Prometheus.Summary}(
-        r, "http_request_time", "Time to process requests.",
-        ["endpoint", "status_code"],
+        "http_request_time", "Time to process requests.",
+        ["endpoint", "status_code"];
+        registry = r,
     )
     @test c in r.collectors
     @test length(c.children) == 0