add push!(Associative, vararg...) [#9295]

Author: bicycle1885

base/dict.jl

@@ -247,6 +247,8 @@ getindex(t::Associative, k1, k2, ks...) = getindex(t, tuple(k1,k2,ks...))
 setindex!(t::Associative, v, k1, k2, ks...) = setindex!(t, v, tuple(k1,k2,ks...))
 
 push!(t::Associative, p::Pair) = setindex!(t, p.second, p.first)
+push!(t::Associative, p::Pair, q::Pair) = push!(push!(t, p), q)
+push!(t::Associative, p::Pair, q::Pair, r::Pair...) = push!(push!(push!(t, p), q), r...)
 
 # hashing objects by identity
 

test/dict.jl

@@ -269,3 +269,18 @@ let
     b = Dict("フー" => 17, "バー" => 4711)
     @test is(typeof(merge(a, b)), Dict{UTF8String,Float64})
 end
+
+# issue 9295
+let
+    d = Dict()
+    @test is(push!(d, 'a' => 1), d)
+    @test d['a'] == 1
+    @test is(push!(d, 'b' => 2, 'c' => 3), d)
+    @test d['b'] == 2
+    @test d['c'] == 3
+    @test is(push!(d, 'd' => 4, 'e' => 5, 'f' => 6), d)
+    @test d['d'] == 4
+    @test d['e'] == 5
+    @test d['f'] == 6
+    @test length(d) == 6
+end