Add nameof (#471)

README.md

@@ -311,6 +311,9 @@ Currently, the `@compat` macro supports the following syntaxes:
 * `module_parent`, `Base.function_module`, and `Base.datatype_module` are now methods of
   a new function called `parentmodule` ([#25629]).
 
+* `module_name`, `Base.function_name`, and `Base.datatype_name` are now methods of a
+  new function called `nameof` ([#25622]).
+
 * `find` is now `findall` ([#25545]).
 
 * `indmin` and `indmax` are now `argmin` and `argmax`, respectively ([#25654]).
@@ -499,6 +502,7 @@ includes this fix. Find the minimum version from there.
 [#25544]: https://github.com/JuliaLang/julia/issues/25544
 [#25545]: https://github.com/JuliaLang/julia/issues/25545
 [#25571]: https://github.com/JuliaLang/julia/issues/25571
+[#25622]: https://github.com/JuliaLang/julia/issues/25622
 [#25628]: https://github.com/JuliaLang/julia/issues/25628
 [#25629]: https://github.com/JuliaLang/julia/issues/25629
 [#25654]: https://github.com/JuliaLang/julia/issues/25654

src/Compat.jl

@@ -1469,6 +1469,13 @@ end
     export codeunits, ncodeunits
 end
 
+@static if !isdefined(Base, :nameof)
+    nameof(m::Module) = Base.module_name(m)
+    nameof(f::Function) = Base.function_name(f)
+    nameof(t::Union{DataType,UnionAll}) = Base.datatype_name(t)
+    export nameof
+end
+
 include("deprecated.jl")
 
 end # module Compat

test/runtests.jl

@@ -1236,6 +1236,12 @@ end
 @test codeunits("foo") == [0x66,0x6f,0x6f] == codeunits(SubString("fooαβγ",1,3))
 @test ncodeunits("αβγ") == 6 == ncodeunits(SubString("fooαβγ",4,8))
 
+# 0.7.0-DEV.3539
+@test nameof(Compat.Sys) == :Sys
+@test nameof(sin) == :sin
+@test nameof(Float64) == :Float64
+@test nameof(Array) == :Array
+
 # 0.7.0-DEV.3382
 module TestLibdl
     using Compat