Add bytesavailable (#483)

README.md

@@ -328,6 +328,8 @@ Currently, the `@compat` macro supports the following syntaxes:
 
 * `endof` is now `lastindex` ([#25458]). (Note that `lastindex(A, n)` is not supported.)
 
+* `nb_available` is now `bytesavailable` ([#25634]).
+
 ## New macros
 
 * `@__DIR__` has been added ([#18380])
@@ -518,6 +520,7 @@ includes this fix. Find the minimum version from there.
 [#25622]: https://github.com/JuliaLang/julia/issues/25622
 [#25628]: https://github.com/JuliaLang/julia/issues/25628
 [#25629]: https://github.com/JuliaLang/julia/issues/25629
+[#25634]: https://github.com/JuliaLang/julia/issues/25634
 [#25646]: https://github.com/JuliaLang/julia/issues/25646
 [#25654]: https://github.com/JuliaLang/julia/issues/25654
 [#24182]: https://github.com/JuliaLang/julia/issues/24182

src/Compat.jl

@@ -1497,6 +1497,12 @@ end
     export AbstractDisplay
 end
 
+# 0.7.0-DEV.3481
+@static if !isdefined(Base, :bytesavailable)
+    const bytesavailable = nb_available
+    export bytesavailable
+end
+
 # 0.7.0-DEV.3583
 @static if !isdefined(Base, :lastindex)
     const lastindex = endof

test/runtests.jl

@@ -1295,6 +1295,12 @@ end
 
 @test eltype(Base.Multimedia.displays) <: AbstractDisplay
 
+# 0.7.0-DEV.3481
+let b = IOBuffer()
+    write(b, "hi")
+    @test bytesavailable(b) == 0
+end
+
 # 0.7.0-DEV.3583
 @test lastindex(zeros(4)) == 4
 @test lastindex(zeros(4,4)) == 16