Drop compat code for at-nospecialize (from #385 and #409)

Author: martinholters

README.md

@@ -368,8 +368,6 @@ Currently, the `@compat` macro supports the following syntaxes:
 
 ## New macros
 
-* `@nospecialize` has been added ([#22666]).
-
 * The logging macros `@error`, `@warn`, `@info` and `@debug` can be used as
   `Compat.@error`, `Compat.@warn`, `Compat.@info` and `Compat.@debug` on Julia 0.6 ([#24490]).
   Note that the behavior do not mirror the logging macros in Julia 0.7, instead on Julia 0.6:

src/Compat.jl

@@ -7,32 +7,6 @@ import Sockets
 
 include("compatmacro.jl")
 
-@static if !isdefined(Base, Symbol("@nospecialize"))
-    # 0.7
-    macro nospecialize(arg)
-        if isa(arg, Symbol)
-            # @nospecialize(arg)
-            return :($(esc(arg))::ANY)
-        elseif isa(arg, Expr) && arg.head == :(::)
-            # @nospecialize(arg::typ)
-            # unsupported: needs ::ANY which would change dispatch as determined by ::typ
-        elseif isa(arg, Expr) && arg.head == :(=)
-            # @nospecialize(arg=val)
-            arg, val = arg.args
-            if isa(arg, Expr) && arg.head == :(::)
-                # @nospecialize(arg::typ=val)
-                # unsupported (see above), but generate a kw arg
-                arg, typ = arg.args
-                return Expr(:kw, :($(esc(arg))::$(esc(typ))), esc(val))
-            else
-                return Expr(:kw, :($(esc(arg))::ANY), esc(val))
-            end
-        end
-        return esc(arg)
-    end
-    export @nospecialize
-end
-
 # https://github.com/JuliaLang/julia/pull/22064
 @static if !isdefined(Base, Symbol("@__MODULE__"))
     # 0.7

test/old.jl

@@ -23,3 +23,20 @@ end
     @test stdout === STDOUT
     @test stderr === STDERR
 end
+
+# @nospecialize
+# 0.7
+no_specialize(@nospecialize(x)) = sin(1)
+no_specialize(@nospecialize(x::Integer)) = sin(2)
+@test no_specialize(1.0) == sin(1)
+@test no_specialize(1) == sin(2)
+no_specialize_kw1(@nospecialize(x=0)) = sin(1)
+no_specialize_kw1(@nospecialize(x::Integer)) = sin(2)
+@test no_specialize_kw1(1.0) == sin(1)
+@test no_specialize_kw1(1) == sin(2)
+@test no_specialize_kw1() == sin(2)
+no_specialize_kw2(@nospecialize(x)) = sin(1)
+no_specialize_kw2(@nospecialize(x::Integer=0)) = sin(2)
+@test no_specialize_kw2(1.0) == sin(1)
+@test no_specialize_kw2(1) == sin(2)
+@test no_specialize_kw2() == sin(2)

test/runtests.jl

@@ -265,23 +265,6 @@ end
 @test @inferred(ntuple(x->x, Val(0))) == ()
 @test @inferred(ntuple(x->x, Val(5))) == (1,2,3,4,5)
 
-# @nospecialize
-# 0.7
-no_specialize(@nospecialize(x)) = sin(1)
-no_specialize(@nospecialize(x::Integer)) = sin(2)
-@test no_specialize(1.0) == sin(1)
-@test no_specialize(1) == sin(2)
-no_specialize_kw1(@nospecialize(x=0)) = sin(1)
-no_specialize_kw1(@nospecialize(x::Integer)) = sin(2)
-@test no_specialize_kw1(1.0) == sin(1)
-@test no_specialize_kw1(1) == sin(2)
-@test no_specialize_kw1() == sin(2)
-no_specialize_kw2(@nospecialize(x)) = sin(1)
-no_specialize_kw2(@nospecialize(x::Integer=0)) = sin(2)
-@test no_specialize_kw2(1.0) == sin(1)
-@test no_specialize_kw2(1) == sin(2)
-@test no_specialize_kw2() == sin(2)
-
 # 0.7
 @test read(IOBuffer("aaaa"), String) == "aaaa"
 @test occursin("read(@__FILE__, String)", read(@__FILE__, String))