Merge pull request #4 from ajinkya-k/ahk/comparative

added macro `@bcomp` to support comparative benchmarks added in Chairmarks v1.3

Author: astrozot

src/PrettyChairmarks.jl

@@ -4,7 +4,7 @@ using Chairmarks
 using Printf
 import Statistics
 
-export @b, @be, @bs
+export @b, @be, @bs, @bcomp
 
 prettypercent(p) = string(@sprintf("%.2f", p * 100), "%")
 
@@ -90,6 +90,13 @@ macro bs(args...)
     :(PrettyBenchmark($call))
 end
 
+macro bcomp(expr...)
+    call = Chairmarks.process_args(expr)
+    quote
+        tuple([PrettyChairmarks.PrettyBenchmark(bnc) for bnc in $call]...)
+    end
+end
+
 _summary(io, t, args...) = withtypename(() -> print(io, args...), io, t)
 
 Base.summary(io::IO, t::PrettyBenchmark) = _summary(io, t, prettytime(time(t)))
@@ -303,4 +310,6 @@ function Base.show(io::IO, ::MIME"text/plain", t1::PrettyBenchmark)
     return print(io, ".")
 end
 
+Base.show(io::IO, m::MIME"text/plain", bmks::Tuple{Vararg{PrettyBenchmark}}) = for b in bmks Base.show(io, m, b) end
+
 end