Add invpermute! and a pairs method for replace

README.md

@@ -219,6 +219,9 @@ Currently, the `@compat` macro supports the following syntaxes:
 
 * `Some{T}` wraps `T` to signify that a result of `T<:Void` is expected ([#23642]).
 
+* `replace` accepts a pair of pattern and replacement, with the number of replacements as
+  a keyword argument ([#25165]).
+
 ## Renaming
 
 
@@ -266,6 +269,8 @@ Currently, the `@compat` macro supports the following syntaxes:
 
 * `unshift!` and `shift!` are now `pushfirst!` and `popfirst!` ([#25100]).
 
+* `ipermute!` is now `invpermute!` ([#25168]).
+
 ## New macros
 
 * `@__DIR__` has been added ([#18380])
@@ -424,3 +429,5 @@ includes this fix. Find the minimum version from there.
 [#25100]: https://github.com/JuliaLang/julia/issues/25100
 [#25102]: https://github.com/JuliaLang/julia/issues/25102
 [#25162]: https://github.com/JuliaLang/julia/issues/25162
+[#25165]: https://github.com/JuliaLang/julia/issues/25165
+[#25168]: https://github.com/JuliaLang/julia/issues/25168

src/Compat.jl

@@ -1059,6 +1059,17 @@ end
     export pushfirst!, popfirst!
 end
 
+# 0.7.0-DEV.3173
+@static if !isdefined(Base, :invpermute!)
+    const invpermute! = ipermute!
+    export invpermute!
+end
+
+@static if VERSION < v"0.7.0-DEV.3172"
+    Base.replace(s::AbstractString, pat_rep::Pair; count::Integer=typemax(Int)) =
+        replace(s, first(pat_rep), last(pat_rep), count)
+end
+
 include("deprecated.jl")
 
 end # module Compat

test/runtests.jl

@@ -1069,6 +1069,13 @@ let coolvec = [1,2,3]
     @test popfirst!(coolvec) == 0
 end
 
+# 0.7.0-DEV.3173
+@test invpermute!(permute!([1, 2], 2:-1:1), 2:-1:1) == [1, 2]
+
+# 0.7.0-DEV.3172
+@test replace("abcb", "b"=>"c") == "accc"
+@test replace("abcb", "b"=>"c", count=1) == "accb"
+
 if VERSION < v"0.6.0"
     include("deprecated.jl")
 end