rename QuickerSort to ScratchQuickSort (#48160)

(cherry picked from commit 9707594)

Author: LilithHafner

base/sort.jl

@@ -86,7 +86,7 @@ issorted(itr;
     issorted(itr, ord(lt,by,rev,order))
 
 function partialsort!(v::AbstractVector, k::Union{Integer,OrdinalRange}, o::Ordering)
-    _sort!(v, InitialOptimizations(QuickerSort(k)), o, (;))
+    _sort!(v, InitialOptimizations(ScratchQuickSort(k)), o, (;))
     maybeview(v, k)
 end
 
@@ -953,12 +953,12 @@ end
 
 
 """
-    QuickerSort(next::Algorithm=SMALL_ALGORITHM) <: Algorithm
-    QuickerSort(lo::Union{Integer, Missing}, hi::Union{Integer, Missing}=lo, next::Algorithm=SMALL_ALGORITHM) <: Algorithm
+    ScratchQuickSort(next::Algorithm=SMALL_ALGORITHM) <: Algorithm
+    ScratchQuickSort(lo::Union{Integer, Missing}, hi::Union{Integer, Missing}=lo, next::Algorithm=SMALL_ALGORITHM) <: Algorithm
 
-Use the `QuickerSort` algorithm with the `next` algorithm as a base case.
+Use the `ScratchQuickSort` algorithm with the `next` algorithm as a base case.
 
-`QuickerSort` is like `QuickSort`, but utilizes scratch space to operate faster and allow
+`ScratchQuickSort` is like `QuickSort`, but utilizes scratch space to operate faster and allow
 for the possibility of maintaining stability.
 
 If `lo` and `hi` are provided, finds and sorts the elements in the range `lo:hi`, reordering
@@ -976,15 +976,15 @@ Characteristics:
   * *quadratic worst case runtime* in pathological cases
   (vanishingly rare for non-malicious input)
 """
-struct QuickerSort{L<:Union{Integer,Missing}, H<:Union{Integer,Missing}, T<:Algorithm} <: Algorithm
+struct ScratchQuickSort{L<:Union{Integer,Missing}, H<:Union{Integer,Missing}, T<:Algorithm} <: Algorithm
     lo::L
     hi::H
     next::T
 end
-QuickerSort(next::Algorithm=SMALL_ALGORITHM) = QuickerSort(missing, missing, next)
-QuickerSort(lo::Union{Integer, Missing}, hi::Union{Integer, Missing}) = QuickerSort(lo, hi, SMALL_ALGORITHM)
-QuickerSort(lo::Union{Integer, Missing}, next::Algorithm=SMALL_ALGORITHM) = QuickerSort(lo, lo, next)
-QuickerSort(r::OrdinalRange, next::Algorithm=SMALL_ALGORITHM) = QuickerSort(first(r), last(r), next)
+ScratchQuickSort(next::Algorithm=SMALL_ALGORITHM) = ScratchQuickSort(missing, missing, next)
+ScratchQuickSort(lo::Union{Integer, Missing}, hi::Union{Integer, Missing}) = ScratchQuickSort(lo, hi, SMALL_ALGORITHM)
+ScratchQuickSort(lo::Union{Integer, Missing}, next::Algorithm=SMALL_ALGORITHM) = ScratchQuickSort(lo, lo, next)
+ScratchQuickSort(r::OrdinalRange, next::Algorithm=SMALL_ALGORITHM) = ScratchQuickSort(first(r), last(r), next)
 
 # select a pivot, partition v[lo:hi] according
 # to the pivot, and store the result in t[lo:hi].
@@ -1023,7 +1023,7 @@ function partition!(t::AbstractVector, lo::Integer, hi::Integer, offset::Integer
     pivot_index
 end
 
-function _sort!(v::AbstractVector, a::QuickerSort, o::Ordering, kw;
+function _sort!(v::AbstractVector, a::ScratchQuickSort, o::Ordering, kw;
                 t=nothing, offset=nothing, swap=false, rev=false)
     @getkw lo hi scratch
 
@@ -1041,7 +1041,7 @@ function _sort!(v::AbstractVector, a::QuickerSort, o::Ordering, kw;
         end
         swap = !swap
 
-        # For QuickerSort(), a.lo === a.hi === missing, so the first two branches get skipped
+        # For ScratchQuickSort(), a.lo === a.hi === missing, so the first two branches get skipped
         if !ismissing(a.lo) && j <= a.lo # Skip sorting the lower part
             swap && copyto!(v, lo, t, lo+offset, j-lo)
             rev && reverse!(v, lo, j-1)
@@ -1239,7 +1239,7 @@ the initial optimizations because they can change the input vector's type and or
 make them `UIntMappable`.
 
 If the input is not [`UIntMappable`](@ref), then we perform a presorted check and dispatch
-to [`QuickerSort`](@ref).
+to [`ScratchQuickSort`](@ref).
 
 Otherwise, we dispatch to [`InsertionSort`](@ref) for inputs with `length <= 40` and then
 perform a presorted check ([`CheckSorted`](@ref)).
@@ -1271,7 +1271,7 @@ Consequently, we apply [`RadixSort`](@ref) for any reasonably long inputs that r
 stage.
 
 Finally, if the input has length less than 80, we dispatch to [`InsertionSort`](@ref) and
-otherwise we dispatch to [`QuickerSort`](@ref).
+otherwise we dispatch to [`ScratchQuickSort`](@ref).
 """
 const DEFAULT_STABLE = InitialOptimizations(
     IsUIntMappable(
@@ -1281,9 +1281,9 @@ const DEFAULT_STABLE = InitialOptimizations(
                     ConsiderCountingSort(
                         ConsiderRadixSort(
                             Small{80}(
-                                QuickerSort())))))),
+                                ScratchQuickSort())))))),
         StableCheckSorted(
-            QuickerSort())))
+            ScratchQuickSort())))
 """
     DEFAULT_UNSTABLE
 
@@ -1497,7 +1497,7 @@ function partialsortperm!(ix::AbstractVector{<:Integer}, v::AbstractVector,
     end
 
     # do partial quicksort
-    _sort!(ix, InitialOptimizations(QuickerSort(k)), Perm(ord(lt, by, rev, order), v), (;))
+    _sort!(ix, InitialOptimizations(ScratchQuickSort(k)), Perm(ord(lt, by, rev, order), v), (;))
 
     maybeview(ix, k)
 end

test/sorting.jl

@@ -79,8 +79,8 @@ end
 end
 
 @testset "stability" begin
-    for Alg in [InsertionSort, MergeSort, Base.Sort.QuickerSort(), Base.DEFAULT_STABLE,
-            Base.Sort.QuickerSort(missing, 1729), Base.Sort.QuickerSort(1729, missing)]
+    for Alg in [InsertionSort, MergeSort, Base.Sort.ScratchQuickSort(), Base.DEFAULT_STABLE,
+            Base.Sort.ScratchQuickSort(missing, 1729), Base.Sort.ScratchQuickSort(1729, missing)]
         @test issorted(sort(1:2000, alg=Alg, by=x->0))
         @test issorted(sort(1:2000, alg=Alg, by=x->x÷100))
     end
@@ -333,7 +333,7 @@ end
             @test c == v
 
             # stable algorithms
-            for alg in [MergeSort, Base.Sort.QuickerSort(), Base.Sort.QuickerSort(1:n), Base.DEFAULT_STABLE]
+            for alg in [MergeSort, Base.Sort.ScratchQuickSort(), Base.Sort.ScratchQuickSort(1:n), Base.DEFAULT_STABLE]
                 p = sortperm(v, alg=alg, rev=rev)
                 p2 = sortperm(float(v), alg=alg, rev=rev)
                 @test p == p2
@@ -381,7 +381,7 @@ end
         end
 
         v = randn_with_nans(n,0.1)
-        for alg in [InsertionSort, MergeSort, Base.Sort.QuickerSort(), Base.Sort.QuickerSort(1, n), Base.DEFAULT_UNSTABLE, Base.DEFAULT_STABLE],
+        for alg in [InsertionSort, MergeSort, Base.Sort.ScratchQuickSort(), Base.Sort.ScratchQuickSort(1, n), Base.DEFAULT_UNSTABLE, Base.DEFAULT_STABLE],
             rev in [false,true]
             alg === InsertionSort && n >= 3000 && continue
             # test float sorting with NaNs
@@ -588,7 +588,7 @@ end
 
     @testset "fallback" begin
         @test adaptive_sort_test(rand(1:typemax(Int32), len), by=x->x^2)# fallback
-        @test adaptive_sort_test(rand(Int, len), by=x->0, trusted=Base.Sort.QuickerSort())
+        @test adaptive_sort_test(rand(Int, len), by=x->0, trusted=Base.Sort.ScratchQuickSort())
     end
 
     @test adaptive_sort_test(rand(Int, 20)) # InsertionSort
@@ -692,7 +692,7 @@ end
     # not allowed. Consequently, none of the behavior tested in this
     # testset is guaranteed to work in future minor versions of Julia.
 
-    safe_algs = [InsertionSort, MergeSort, Base.Sort.QuickerSort(), Base.DEFAULT_STABLE, Base.DEFAULT_UNSTABLE]
+    safe_algs = [InsertionSort, MergeSort, Base.Sort.ScratchQuickSort(), Base.DEFAULT_STABLE, Base.DEFAULT_UNSTABLE]
 
     n = 1000
     v = rand(1:5, n);
@@ -899,8 +899,8 @@ end
     @test issorted(sort(rand(Int8, 600)))
 end
 
-@testset "QuickerSort API" begin
-    bsqs = Base.Sort.QuickerSort
+@testset "ScratchQuickSort API" begin
+    bsqs = Base.Sort.ScratchQuickSort
     @test bsqs(1, 2, MergeSort)             === bsqs(1, 2, MergeSort)
     @test bsqs(missing, 2, MergeSort)       === bsqs(missing, 2, MergeSort)
     @test bsqs(1, missing, MergeSort)       === bsqs(1, missing, MergeSort)
@@ -918,10 +918,10 @@ end
     @test bsqs()                            === bsqs(missing, missing, InsertionSort)
 end
 
-@testset "QuickerSort allocations on non-concrete eltype" begin
+@testset "ScratchQuickSort allocations on non-concrete eltype" begin
     v = Vector{Union{Nothing, Bool}}(rand(Bool, 10000))
     @test 4 == @allocations sort(v)
-    @test 4 == @allocations sort(v; alg=Base.Sort.QuickerSort())
+    @test 4 == @allocations sort(v; alg=Base.Sort.ScratchQuickSort())
     # it would be nice if these numbers were lower (1 or 2), but these
     # test that we don't have O(n) allocations due to type instability
 end