--- a/src/Metaprogramming.jl	Wed Dec 15 01:09:09 2021 +0200
+++ b/src/Metaprogramming.jl	Wed Dec 22 11:13:38 2021 +0200
@@ -35,7 +35,7 @@
 Does `foldl` on the `Expr`s in `a` with the `f`, a `Function` or another `Expr`
 representing a function. Returns new `Expr` with the expanded `foldl` operation.
 """
-function foldl_exprs(f :: Expr, a)
+function foldl_exprs(f :: Union{Expr,Symbol}, a)
    return foldl((b, c) -> :($f($b, $c)), a)
 end