remove workspace

NEWS.md

@@ -732,6 +732,9 @@ Deprecated or removed
   * `trues(A::AbstractArray)` and `falses(A::AbstractArray)` are deprecated in favor of
     `trues(size(A))` and `falses(size(A))` respectively ([#24595]).
 
+  * `workspace` is discontinued, check out [Revise.jl](https://github.com/timholy/Revise.jl)
+    for an alternative workflow ([#25046]).
+
   * `cumsum`, `cumprod`, `accumulate`, and their mutating versions now require a `dim`
     argument instead of defaulting to using the first dimension ([#24684]).
 

base/exports.jl

@@ -960,7 +960,6 @@ export
     varinfo,
     versioninfo,
     which,
-    workspace,
     @isdefined,
 
 # loading source files

base/interactiveutil.jl

@@ -666,33 +666,6 @@ functionality instead.
 """
 download(url, filename)
 
-# workspace management
-
-"""
-    workspace()
-
-Replace the top-level module (`Main`) with a new one, providing a clean workspace. The
-previous `Main` module is made available as `LastMain`.
-
-If `Package` was previously loaded, `using Package` in the new `Main` will re-use the
-loaded copy. Run `reload("Package")` first to load a fresh copy.
-
-This function should only be used interactively.
-"""
-function workspace()
-    last = Core.Main # ensure to reference the current Main module
-    b = Base # this module
-    ccall(:jl_new_main_module, Any, ()) # make Core.Main a new baremodule
-    m = Core.Main # now grab a handle to the new Main module
-    ccall(:jl_add_standard_imports, Void, (Any,), m)
-    eval(m, Expr(:toplevel,
-                 :(const Base = $b),
-                 :(const LastMain = $last),
-                 :(using Base.MainInclude)))
-    empty!(package_locks)
-    return m
-end
-
 # testing
 
 """

base/reflection.jl

@@ -18,7 +18,7 @@ module_name(m::Module) = ccall(:jl_module_name, Ref{Symbol}, (Any,), m)
 """
     module_parent(m::Module) -> Module
 
-Get a module's enclosing `Module`. `Main` is its own parent, as is `LastMain` after `workspace()`.
+Get a module's enclosing `Module`. `Main` is its own parent.
 
 # Examples
 ```jldoctest

doc/src/manual/modules.md

@@ -355,7 +355,7 @@ code to help the user avoid other wrong-behavior situations:
    emitted when the incremental precompile flag is set.
 2. `global const` statements from local scope after `__init__()` has been started (see issue #12010
    for plans to add an error for this)
-3. Replacing a module (or calling [`workspace()`](@ref)) is a runtime error while doing an incremental precompile.
+3. Replacing a module is a runtime error while doing an incremental precompile.
 
 A few other points to be aware of:
 

doc/src/stdlib/base.md

@@ -48,7 +48,6 @@ Base.methods
 Base.methodswith
 Base.@show
 Base.versioninfo
-Base.workspace
 ans
 ```
 

test/choosetests.jl

@@ -48,7 +48,7 @@ function choosetests(choices = [])
         "replutil", "sets", "goto", "llvmcall", "llvmcall2", "grisu",
         "nullable", "meta", "stacktraces", "libgit2", "docs",
         "markdown", "serialize", "misc", "threads",
-        "enums", "cmdlineargs", "i18n", "workspace", "libdl", "int",
+        "enums", "cmdlineargs", "i18n", "libdl", "int",
         "checked", "bitset", "floatfuncs", "compile", "distributed", "inline",
         "boundscheck", "error", "ambiguous", "cartesian", "asmvariant", "osutils",
         "channels", "iostream", "specificity", "codegen", "codevalidation",