tests pass

src/macros.jl

@@ -1859,6 +1859,10 @@ To select many columns at once use the tools `Not`, `Between`, `All`, and `Cols`
 * `@select df Cols(...)` can be used to combine many different selectors, as well as use
   regular expressions. For example `Cols(r"a")` selects all columns that start with `"a"`.
 
+Expressions inside `Not(...)`, `Between(...)` etc. are untouched by DataFramesMeta's
+parsing. To refer to a variable `x` which represents a column inside `Not`, write `Not(x)`,
+rather than `Not($(DOLLAR)x)`.
+
 $ASTABLE_MACRO_FLAG_DOCS
 
 $ASTABLE_RHS_SELECT_TRANSFORM_DOCS

src/parsing.jl

@@ -360,8 +360,9 @@ function fun_to_vec(ex::Expr;
     if allow_multicol
         exhead = ex.head
         if ex.head === :call
-            exhead === :All || exhead === :Not || exhead === :Cols || exhead === :Between
-            return ex
+            if exhead === :All || exhead === :Not || exhead === :Cols || exhead === :Between
+                return ex
+            end
         end
     end
 
@@ -427,7 +428,8 @@ end
 fun_to_vec(ex::QuoteNode;
            no_dest::Bool=false,
            gensym_names::Bool=false,
-           outer_flags::Union{NamedTuple, Nothing}=nothing) = ex
+           outer_flags::Union{NamedTuple, Nothing}=nothing,
+           allow_multicol::Bool = false) = ex
 
 
 """

test/dataframes.jl

@@ -275,10 +275,10 @@ s = [:i, :g]
     # not part of DataFramesMeta.
     @test_throws LoadError @eval @transform(df, [:i, :g])
     @test_throws LoadError @eval @transform(df, All())
-    @test_throws LoadError @eval @transform(df, Between(:i, :t)).Between == df.i
-    @test_throws LoadError @eval @transform(df, Not(:i)).Not == df.i
+    @test_throws LoadError @eval @transform(df, Between(:i, :t))
+    @test_throws LoadError @eval @transform(df, Not(:i))
     @test_throws LoadError @eval @transform(df, Not([:i, :g]))
-    @test_throws MethodError @eval @transform(df, :n = sum(Between(:i, :t)))
+    @test_throws LoadError @eval @transform(df, :n = sum(Between(:i, :t)))
 end
 
 @testset "@select" begin
@@ -550,7 +550,7 @@ cr = "c"
     @test_throws LoadError @eval @select(df, Between(:i, :t)).Between == df.i
     @test_throws LoadError @eval  @select(df, Not(:i)).Not == df.i
     @test_throws LoadError @eval @select(df, Not([:i, :g]))
-    @test_throws MethodError @eval @select(df, :n = sum(Between(:i, :t)))
+    @test_throws LoadError @eval @select(df, :n = sum(Between(:i, :t)))
 end
 
 @testset "with" begin

test/grouping.jl

@@ -148,7 +148,7 @@ gd = groupby(df, :g)
 newvar = :n
 
 @testset "Limits of @combine" begin
-    @test_throws MethodError @eval @combine(gd, :n = sum(Between(:i, :t)))
+    @test_throws LoadError @eval @combine(gd, :n = sum(Between(:i, :t)))
     @test_throws ArgumentError @eval @combine(gd, :n = mean(:i) + mean(cols(1)))
 end
 
@@ -287,7 +287,7 @@ gd = groupby(df, :g)
 newvar = :n
 
 @testset "limits of @by" begin
-    @test_throws MethodError @eval @by(df, :g, :n = sum(Between(:i, :t)))
+    @test_throws LoadError @eval @by(df, :g, :n = sum(Between(:i, :t)))
     @test_throws ArgumentError @eval @by(df, :g, :n = mean(:i) + mean(cols(1)))
 end