make more standard libraries work with `nimPreviewSlimSystem` (#20343)

* make more standard libraries work with `nimPreviewSlimSystem`

* typo

* part two

* Delete specutils.nim

* fixes more tests

* more fixes

* fixes tests

* fixes three more tests

* add formatfloat import

* fix

* last

27 files changed, 77 insertions, 1 deletions

diff --git a/lib/pure/asyncdispatch.nim b/lib/pure/asyncdispatch.nim
index ed786cefb..92ad9c5ff 100644
--- a/lib/pure/asyncdispatch.nim
+++ b/lib/pure/asyncdispatch.nim
@@ -232,6 +232,9 @@ import asyncfutures except callSoon
 
 import nativesockets, net, deques
 
+when defined(nimPreviewSlimSystem):
+  import std/[assertions, syncio]
+
 export Port, SocketFlag
 export asyncfutures except callSoon
 export asyncstreams
diff --git a/lib/pure/asyncfile.nim b/lib/pure/asyncfile.nim
index 222a89b97..9cc9f5b48 100644
--- a/lib/pure/asyncfile.nim
+++ b/lib/pure/asyncfile.nim
@@ -24,6 +24,9 @@
 
 import asyncdispatch, os
 
+when defined(nimPreviewSlimSystem):
+  import std/[assertions, syncio]
+
 # TODO: Fix duplication introduced by PR #4683.
 
 when defined(windows) or defined(nimdoc):
diff --git a/lib/pure/asyncftpclient.nim b/lib/pure/asyncftpclient.nim
index 056d65564..0d2ee80c5 100644
--- a/lib/pure/asyncftpclient.nim
+++ b/lib/pure/asyncftpclient.nim
@@ -81,6 +81,9 @@
 import asyncdispatch, asyncnet, nativesockets, strutils, parseutils, os, times
 from net import BufferSize
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 type
   AsyncFtpClient* = ref object
     csock*: AsyncSocket
diff --git a/lib/pure/asyncfutures.nim b/lib/pure/asyncfutures.nim
index e91b99c3a..035b6182d 100644
--- a/lib/pure/asyncfutures.nim
+++ b/lib/pure/asyncfutures.nim
@@ -13,6 +13,7 @@ import system/stacktraces
 
 when defined(nimPreviewSlimSystem):
   import std/objectdollar # for StackTraceEntry
+  import std/assertions
 
 # TODO: This shouldn't need to be included, but should ideally be exported.
 type
diff --git a/lib/pure/asynchttpserver.nim b/lib/pure/asynchttpserver.nim
index ac51d768d..6694c4bc2 100644
--- a/lib/pure/asynchttpserver.nim
+++ b/lib/pure/asynchttpserver.nim
@@ -44,6 +44,9 @@ import httpcore
 from nativesockets import getLocalAddr, Domain, AF_INET, AF_INET6
 import std/private/since
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 export httpcore except parseHeader
 
 const
diff --git a/lib/pure/asyncnet.nim b/lib/pure/asyncnet.nim
index cd02e5df5..b61eaa902 100644
--- a/lib/pure/asyncnet.nim
+++ b/lib/pure/asyncnet.nim
@@ -96,6 +96,10 @@
 ##
 
 import std/private/since
+
+when defined(nimPreviewSlimSystem):
+  import std/[assertions, syncio]
+
 import asyncdispatch, nativesockets, net, os
 
 export SOBool
diff --git a/lib/pure/asyncstreams.nim b/lib/pure/asyncstreams.nim
index 083c6f0ea..3f7774ed8 100644
--- a/lib/pure/asyncstreams.nim
+++ b/lib/pure/asyncstreams.nim
@@ -11,6 +11,9 @@
 
 import asyncfutures
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 import deques
 
 type
diff --git a/lib/pure/cgi.nim b/lib/pure/cgi.nim
index 566482b21..0ab8f4c95 100644
--- a/lib/pure/cgi.nim
+++ b/lib/pure/cgi.nim
@@ -32,6 +32,9 @@
 import strutils, os, strtabs, cookies, uri
 export uri.encodeUrl, uri.decodeUrl
 
+when defined(nimPreviewSlimSystem):
+  import std/syncio
+
 
 proc addXmlChar(dest: var string, c: char) {.inline.} =
   case c
diff --git a/lib/pure/collections/critbits.nim b/lib/pure/collections/critbits.nim
index dca60b37b..24257dacb 100644
--- a/lib/pure/collections/critbits.nim
+++ b/lib/pure/collections/critbits.nim
@@ -36,6 +36,9 @@ runnableExamples:
 
 import std/private/since
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 type
   NodeObj[T] {.acyclic.} = object
     byte: int ## byte index of the difference
diff --git a/lib/pure/concurrency/cpuload.nim b/lib/pure/concurrency/cpuload.nim
index 841d58d86..137dd67ad 100644
--- a/lib/pure/concurrency/cpuload.nim
+++ b/lib/pure/concurrency/cpuload.nim
@@ -19,6 +19,9 @@ when defined(windows):
 elif defined(linux):
   from cpuinfo import countProcessors
 
+when defined(nimPreviewSlimSystem):
+  import std/syncio
+
 type
   ThreadPoolAdvice* = enum
     doNothing,
diff --git a/lib/pure/concurrency/threadpool.nim b/lib/pure/concurrency/threadpool.nim
index 9334b4833..5d9e7452b 100644
--- a/lib/pure/concurrency/threadpool.nim
+++ b/lib/pure/concurrency/threadpool.nim
@@ -23,6 +23,9 @@ when not compileOption("threads"):
 
 import cpuinfo, cpuload, locks, os
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 {.push stackTrace:off.}
 
 type
diff --git a/lib/pure/cookies.nim b/lib/pure/cookies.nim
index 0306558d6..22704e434 100644
--- a/lib/pure/cookies.nim
+++ b/lib/pure/cookies.nim
@@ -11,6 +11,9 @@
 
 import strtabs, times, options
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 
 type
   SameSite* {.pure.} = enum ## The SameSite cookie attribute.
diff --git a/lib/pure/encodings.nim b/lib/pure/encodings.nim
index 36e891dd3..26b6e1f22 100644
--- a/lib/pure/encodings.nim
+++ b/lib/pure/encodings.nim
@@ -40,6 +40,8 @@ runnableExamples:
 
 
 import os
+when defined(nimPreviewSlimSystem):
+  import std/assertions
 
 when not defined(windows):
   type
diff --git a/lib/pure/httpclient.nim b/lib/pure/httpclient.nim
index 405fadc2f..5c7f538b5 100644
--- a/lib/pure/httpclient.nim
+++ b/lib/pure/httpclient.nim
@@ -237,6 +237,9 @@ import std/[
   asyncnet, asyncdispatch, asyncfile, nativesockets,
 ]
 
+when defined(nimPreviewSlimSystem):
+  import std/[assertions, syncio]
+
 export httpcore except parseHeader # TODO: The `except` doesn't work
 
 type
diff --git a/lib/pure/marshal.nim b/lib/pure/marshal.nim
index 06a21976b..848d7e3fb 100644
--- a/lib/pure/marshal.nim
+++ b/lib/pure/marshal.nim
@@ -56,6 +56,9 @@ Please contribute a new implementation.""".}
 
 import streams, typeinfo, json, intsets, tables, unicode
 
+when defined(nimPreviewSlimSystem):
+  import std/[assertions, formatfloat]
+
 proc ptrToInt(x: pointer): int {.inline.} =
   result = cast[int](x) # don't skip alignment
 
diff --git a/lib/pure/memfiles.nim b/lib/pure/memfiles.nim
index dacb15e17..28563b6fe 100644
--- a/lib/pure/memfiles.nim
+++ b/lib/pure/memfiles.nim
@@ -24,6 +24,10 @@ else:
 
 import os, streams
 
+when defined(nimPreviewSlimSystem):
+  import std/[syncio, assertions]
+
+
 proc newEIO(msg: string): ref IOError =
   new(result)
   result.msg = msg
diff --git a/lib/pure/mimetypes.nim b/lib/pure/mimetypes.nim
index d1566d897..346fb39ee 100644
--- a/lib/pure/mimetypes.nim
+++ b/lib/pure/mimetypes.nim
@@ -29,6 +29,10 @@ runnableExamples:
 import tables
 from strutils import startsWith, toLowerAscii, strip
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
+
 type
   MimeDB* = object
     mimes: OrderedTable[string, string]
diff --git a/lib/pure/nativesockets.nim b/lib/pure/nativesockets.nim
index ca4e61621..dcba996a4 100644
--- a/lib/pure/nativesockets.nim
+++ b/lib/pure/nativesockets.nim
@@ -16,6 +16,8 @@ import os, options
 import std/private/since
 import std/strbasics
 
+when defined(nimPreviewSlimSystem):
+  import std/[assertions, syncio]
 
 when hostOS == "solaris":
   {.passl: "-lsocket -lnsl".}
diff --git a/lib/pure/net.nim b/lib/pure/net.nim
index 9ed73e723..16390d9af 100644
--- a/lib/pure/net.nim
+++ b/lib/pure/net.nim
@@ -90,6 +90,9 @@ runnableExamples("-r:off"):
 
 import std/private/since
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 import nativesockets
 import os, strutils, times, sets, options, std/monotimes
 import ssl_config
diff --git a/lib/pure/parsesql.nim b/lib/pure/parsesql.nim
index 61196aead..3af840e29 100644
--- a/lib/pure/parsesql.nim
+++ b/lib/pure/parsesql.nim
@@ -15,6 +15,9 @@
 import strutils, lexbase
 import std/private/decode_helpers
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 # ------------------- scanner -------------------------------------------------
 
 type
diff --git a/lib/pure/parsexml.nim b/lib/pure/parsexml.nim
index 79a9cc730..3ba5a19d5 100644
--- a/lib/pure/parsexml.nim
+++ b/lib/pure/parsexml.nim
@@ -149,6 +149,9 @@ an HTML document contains.
 import
   strutils, lexbase, streams, unicode
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 # the parser treats ``<br />`` as ``<br></br>``
 
 #  xmlElementCloseEnd, ## ``/>``
diff --git a/lib/pure/random.nim b/lib/pure/random.nim
index 8ce23b948..de93f468f 100644
--- a/lib/pure/random.nim
+++ b/lib/pure/random.nim
@@ -75,6 +75,9 @@ runnableExamples:
 import algorithm, math
 import std/private/since
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 include system/inclrtl
 {.push debugger: off.}
 
diff --git a/lib/pure/rationals.nim b/lib/pure/rationals.nim
index 800979cda..aba0f4ce4 100644
--- a/lib/pure/rationals.nim
+++ b/lib/pure/rationals.nim
@@ -22,6 +22,8 @@ runnableExamples:
   doAssert r1 / r2 == -2 // 3
 
 import math, hashes
+when defined(nimPreviewSlimSystem):
+  import std/assertions
 
 type Rational*[T] = object
   ## A rational number, consisting of a numerator `num` and a denominator `den`.
diff --git a/lib/pure/ropes.nim b/lib/pure/ropes.nim
index 84b5b47c2..b973fd222 100644
--- a/lib/pure/ropes.nim
+++ b/lib/pure/ropes.nim
@@ -20,7 +20,7 @@ include system/inclrtl
 import streams
 
 when defined(nimPreviewSlimSystem):
-  import std/syncio
+  import std/[syncio, formatfloat, assertions]
 
 {.push debugger: off.} # the user does not want to trace a part
                        # of the standard library!
diff --git a/lib/pure/selectors.nim b/lib/pure/selectors.nim
index 313702370..ab7e104fc 100644
--- a/lib/pure/selectors.nim
+++ b/lib/pure/selectors.nim
@@ -29,6 +29,9 @@
 
 import os, nativesockets
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 const hasThreadSupport = compileOption("threads") and defined(threadsafe)
 
 const ioselSupportedPlatform* = defined(macosx) or defined(freebsd) or
diff --git a/lib/pure/stats.nim b/lib/pure/stats.nim
index 58014e503..7f797529d 100644
--- a/lib/pure/stats.nim
+++ b/lib/pure/stats.nim
@@ -55,6 +55,9 @@ runnableExamples:
 
 from math import FloatClass, sqrt, pow, round
 
+when defined(nimPreviewSlimSystem):
+  import std/[assertions, formatfloat]
+
 {.push debugger: off.} # the user does not want to trace a part
                        # of the standard library!
 {.push checks: off, line_dir: off, stack_trace: off.}
diff --git a/lib/pure/unittest.nim b/lib/pure/unittest.nim
index ec8058c1a..593bc1ca4 100644
--- a/lib/pure/unittest.nim
+++ b/lib/pure/unittest.nim
@@ -108,6 +108,9 @@
 import std/private/since
 import std/exitprocs
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 import macros, strutils, streams, times, sets, sequtils
 
 when declared(stdout):