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-rw-r--r--compiler/lexer.nim4
-rw-r--r--lib/pure/collections/tableimpl.nim5
-rw-r--r--lib/pure/logging.nim13
-rw-r--r--lib/pure/rationals.nim2
-rw-r--r--lib/pure/strutils.nim26
-rw-r--r--lib/system/sysio.nim21
6 files changed, 50 insertions, 21 deletions
diff --git a/compiler/lexer.nim b/compiler/lexer.nim
index 69a0fea2a..0032b97df 100644
--- a/compiler/lexer.nim
+++ b/compiler/lexer.nim
@@ -263,7 +263,7 @@ template eatChar(L: var TLexer, t: var TToken) =
   add(t.literal, L.buf[L.bufpos])
   inc(L.bufpos)
 
-proc getNumber(L: var TLexer): TToken =
+proc getNumber(L: var TLexer, result: var TToken) =
   proc matchUnderscoreChars(L: var TLexer, tok: var TToken, chars: set[char]) =
     var pos = L.bufpos              # use registers for pos, buf
     var buf = L.buf
@@ -1061,7 +1061,7 @@ proc rawGetTok*(L: var TLexer, tok: var TToken) =
       getCharacter(L, tok)
       tok.tokType = tkCharLit
     of '0'..'9':
-      tok = getNumber(L)
+      getNumber(L, tok)
     else:
       if c in OpChars:
         getOperator(L, tok)
diff --git a/lib/pure/collections/tableimpl.nim b/lib/pure/collections/tableimpl.nim
index beafe1109..e4ec05b1c 100644
--- a/lib/pure/collections/tableimpl.nim
+++ b/lib/pure/collections/tableimpl.nim
@@ -129,4 +129,7 @@ template delImpl() {.dirty, immediate.} =
           r = t.data[i].hcode and msk    # "home" location of key@i
           if not ((i >= r and r > j) or (r > j and j > i) or (j > i and i >= r)):
             break
-        shallowCopy(t.data[j], t.data[i]) # data[j] will be marked EMPTY next loop
+        when defined(js):
+          t.data[j] = t.data[i]
+        else:
+          shallowCopy(t.data[j], t.data[i]) # data[j] will be marked EMPTY next loop
diff --git a/lib/pure/logging.nim b/lib/pure/logging.nim
index aa55b5ade..f602ce31d 100644
--- a/lib/pure/logging.nim
+++ b/lib/pure/logging.nim
@@ -92,6 +92,10 @@ type
 {.deprecated: [TLevel: Level, PLogger: Logger, PConsoleLogger: ConsoleLogger,
     PFileLogger: FileLogger, PRollingFileLogger: RollingFileLogger].}
 
+var
+  level {.threadvar.}: Level   ## global log filter
+  handlers {.threadvar.}: seq[Logger] ## handlers with their own log levels
+
 proc substituteLog*(frmt: string, level: Level, args: varargs[string, `$`]): string =
   ## Format a log message using the ``frmt`` format string, ``level`` and varargs.
   ## See the module documentation for the format string syntax.
@@ -133,13 +137,13 @@ method log*(logger: Logger, level: Level, args: varargs[string, `$`]) {.
 
 method log*(logger: ConsoleLogger, level: Level, args: varargs[string, `$`]) =
   ## Logs to the console using ``logger`` only.
-  if level >= logger.levelThreshold:
+  if level >= logging.level and level >= logger.levelThreshold:
     writeLine(stdout, substituteLog(logger.fmtStr, level, args))
     if level in {lvlError, lvlFatal}: flushFile(stdout)
 
 method log*(logger: FileLogger, level: Level, args: varargs[string, `$`]) =
   ## Logs to a file using ``logger`` only.
-  if level >= logger.levelThreshold:
+  if level >= logging.level and level >= logger.levelThreshold:
     writeLine(logger.file, substituteLog(logger.fmtStr, level, args))
     if level in {lvlError, lvlFatal}: flushFile(logger.file)
 
@@ -224,7 +228,7 @@ proc rotate(logger: RollingFileLogger) =
 
 method log*(logger: RollingFileLogger, level: Level, args: varargs[string, `$`]) =
   ## Logs to a file using rolling ``logger`` only.
-  if level >= logger.levelThreshold:
+  if level >= logging.level and level >= logger.levelThreshold:
     if logger.curLine >= logger.maxLines:
       logger.file.close()
       rotate(logger)
@@ -238,9 +242,6 @@ method log*(logger: RollingFileLogger, level: Level, args: varargs[string, `$`])
 
 # --------
 
-var level {.threadvar.}: Level   ## global log filter
-var handlers {.threadvar.}: seq[Logger] ## handlers with their own log levels
-
 proc logLoop(level: Level, args: varargs[string, `$`]) =
   for logger in items(handlers):
     if level >= logger.levelThreshold:
diff --git a/lib/pure/rationals.nim b/lib/pure/rationals.nim
index 72c64befc..6fd05dc4b 100644
--- a/lib/pure/rationals.nim
+++ b/lib/pure/rationals.nim
@@ -164,7 +164,7 @@ proc `-` *[T](x: Rational[T], y: T): Rational[T] =
 
 proc `-` *[T](x: T, y: Rational[T]): Rational[T] =
   ## Subtract rational `y` from int `x`.
-  result.num = - x * y.den + y.num
+  result.num = x * y.den - y.num
   result.den = y.den
 
 proc `-=` *[T](x: var Rational[T], y: Rational[T]) =
diff --git a/lib/pure/strutils.nim b/lib/pure/strutils.nim
index a446f85b4..f2c1e77e1 100644
--- a/lib/pure/strutils.nim
+++ b/lib/pure/strutils.nim
@@ -882,7 +882,7 @@ proc abbrev*(s: string, possibilities: openArray[string]): int =
 
 # ---------------------------------------------------------------------------
 
-proc join*(a: openArray[string], sep: string): string {.
+proc join*(a: openArray[string], sep: string = ""): string {.
   noSideEffect, rtl, extern: "nsuJoinSep".} =
   ## Concatenates all strings in `a` separating them with `sep`.
   if len(a) > 0:
@@ -896,16 +896,15 @@ proc join*(a: openArray[string], sep: string): string {.
   else:
     result = ""
 
-proc join*(a: openArray[string]): string {.
-  noSideEffect, rtl, extern: "nsuJoin".} =
-  ## Concatenates all strings in `a`.
-  if len(a) > 0:
-    var L = 0
-    for i in 0..high(a): inc(L, a[i].len)
-    result = newStringOfCap(L)
-    for i in 0..high(a): add(result, a[i])
-  else:
-    result = ""
+proc join*[T: not string](a: openArray[T], sep: string = ""): string {.
+  noSideEffect, rtl.} =
+  ## Converts all elements in `a` to strings using `$` and concatenates them
+  ## with `sep`.
+  result = ""
+  for i, x in a:
+    if i > 0:
+      add(result, sep)
+    add(result, $x)
 
 type
   SkipTable = array[char, int]
@@ -1721,3 +1720,8 @@ when isMainModule:
   doAssert(not isUpper("AAcc"))
   doAssert(not isUpper("A#$"))
   doAssert(unescape(r"\x013", "", "") == "\x013")
+
+  doAssert join(["foo", "bar", "baz"]) == "foobarbaz"
+  doAssert join(@["foo", "bar", "baz"], ", ") == "foo, bar, baz"
+  doAssert join([1, 2, 3]) == "123"
+  doAssert join(@[1, 2, 3], ", ") == "1, 2, 3"
diff --git a/lib/system/sysio.nim b/lib/system/sysio.nim
index 78c7b1ca1..d0bba6775 100644
--- a/lib/system/sysio.nim
+++ b/lib/system/sysio.nim
@@ -270,12 +270,33 @@ const
     # we always use binary here as for Nim the OS line ending
     # should not be translated.
 
+when defined(posix) and not defined(nimscript):
+  type
+    Mode {.importc: "mode_t", header: "<sys/types.h>".} = cint
+
+    Stat {.importc: "struct stat",
+             header: "<sys/stat.h>", final, pure.} = object ## struct stat
+      st_mode: Mode        ## Mode of file
+
+  proc S_ISDIR(m: Mode): bool {.importc, header: "<sys/stat.h>".}
+    ## Test for a directory.
+
+  proc fstat(a1: cint, a2: var Stat): cint {.importc, header: "<sys/stat.h>".}
 
 proc open(f: var File, filename: string,
           mode: FileMode = fmRead,
           bufSize: int = -1): bool =
   var p: pointer = fopen(filename, FormatOpen[mode])
   if p != nil:
+    when defined(posix) and not defined(nimscript):
+      # How `fopen` handles opening a directory is not specified in ISO C and
+      # POSIX. We do not want to handle directories as regular files that can
+      # be opened.
+      var f2 = cast[File](p)
+      var res: Stat
+      if fstat(getFileHandle(f2), res) >= 0'i32 and S_ISDIR(res.st_mode):
+        close(f2)
+        return false
     result = true
     f = cast[File](p)
     if bufSize > 0 and bufSize <= high(cint).int:
ass='alt'>
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