Merge branch 'devel' of github.com:nim-lang/Nim into devel

compiler/ccgexprs.nim

@@ -59,7 +59,7 @@ proc genLiteral(p: BProc, n: PNode, ty: PType): Rope =
     else:
       result = rope("NIM_NIL")
   of nkStrLit..nkTripleStrLit:
-    case skipTypes(ty, abstractVarRange).kind
+    case skipTypes(ty, abstractVarRange + {tyStatic}).kind
     of tyNil:
       result = genNilStringLiteral(p.module, n.info)
     of tyString:
@@ -385,7 +385,7 @@ proc genDeepCopy(p: BProc; dest, src: TLoc) =
     else:
       addrLoc(p.config, a)
 
-  var ty = skipTypes(dest.t, abstractVarRange)
+  var ty = skipTypes(dest.t, abstractVarRange + {tyStatic})
   case ty.kind
   of tyPtr, tyRef, tyProc, tyTuple, tyObject, tyArray:
     # XXX optimize this

compiler/commands.nim

@@ -606,7 +606,10 @@ proc processSwitch*(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;
     incl(conf.globalOptions, optRun)
   of "verbosity":
     expectArg(conf, switch, arg, pass, info)
-    conf.verbosity = parseInt(arg)
+    let verbosity = parseInt(arg)
+    if verbosity notin {0..3}:
+      localError(conf, info, "invalid verbosity level: '$1'" % arg)
+    conf.verbosity = verbosity
     conf.notes = NotesVerbosity[conf.verbosity]
     incl(conf.notes, conf.enableNotes)
     excl(conf.notes, conf.disableNotes)

compiler/semexprs.nim

@@ -271,7 +271,7 @@ proc semLowHigh(c: PContext, n: PNode, m: TMagic): PNode =
     localError(c.config, n.info, errXExpectsTypeOrValue % opToStr[m])
   else:
     n.sons[1] = semExprWithType(c, n.sons[1], {efDetermineType})
-    var typ = skipTypes(n.sons[1].typ, abstractVarRange + {tyTypeDesc})
+    var typ = skipTypes(n.sons[1].typ, abstractVarRange + {tyTypeDesc, tyUserTypeClassInst})
     case typ.kind
     of tySequence, tyString, tyCString, tyOpenArray, tyVarargs:
       n.typ = getSysType(c.graph, n.info, tyInt)
@@ -1261,7 +1261,7 @@ proc semSubscript(c: PContext, n: PNode, flags: TExprFlags): PNode =
   # make sure we don't evaluate generic macros/templates
   n.sons[0] = semExprWithType(c, n.sons[0],
                               {efNoEvaluateGeneric})
-  let arr = skipTypes(n.sons[0].typ, {tyGenericInst,
+  let arr = skipTypes(n.sons[0].typ, {tyGenericInst, tyUserTypeClassInst,
                                       tyVar, tyLent, tyPtr, tyRef, tyAlias, tySink})
   case arr.kind
   of tyArray, tyOpenArray, tyVarargs, tySequence, tyString,

compiler/semfold.nim

@@ -211,7 +211,12 @@ proc evalOp(m: TMagic, n, a, b, c: PNode; g: ModuleGraph): PNode =
   of mUnaryMinusF64: result = newFloatNodeT(- getFloat(a), n, g)
   of mNot: result = newIntNodeT(1 - getInt(a), n, g)
   of mCard: result = newIntNodeT(nimsets.cardSet(g.config, a), n, g)
-  of mBitnotI: result = newIntNodeT(not getInt(a), n, g)
+  of mBitnotI:
+    case skipTypes(n.typ, abstractRange).kind
+    of tyUInt..tyUInt64:
+      result = newIntNodeT((not getInt(a)) and lastOrd(g.config, a.typ, fixedUnsigned=true), n, g)
+    else:
+      result = newIntNodeT(not getInt(a), n, g)
   of mLengthArray: result = newIntNodeT(lengthOrd(g.config, a.typ), n, g)
   of mLengthSeq, mLengthOpenArray, mXLenSeq, mLengthStr, mXLenStr:
     if a.kind == nkNilLit:
@@ -250,8 +255,10 @@ proc evalOp(m: TMagic, n, a, b, c: PNode; g: ModuleGraph): PNode =
     of tyInt8: result = newIntNodeT(int8(getInt(a)) shl int8(getInt(b)), n, g)
     of tyInt16: result = newIntNodeT(int16(getInt(a)) shl int16(getInt(b)), n, g)
     of tyInt32: result = newIntNodeT(int32(getInt(a)) shl int32(getInt(b)), n, g)
-    of tyInt64, tyInt, tyUInt..tyUInt64:
+    of tyInt64, tyInt:
       result = newIntNodeT(`shl`(getInt(a), getInt(b)), n, g)
+    of tyUInt..tyUInt64:
+      result = newIntNodeT(`shl`(getInt(a), getInt(b)) and lastOrd(g.config, a.typ, fixedUnsigned=true), n, g)
     else: internalError(g.config, n.info, "constant folding for shl")
   of mShrI:
     case skipTypes(n.typ, abstractRange).kind
@@ -612,7 +619,7 @@ proc getConstExpr(m: PSym, n: PNode; g: ModuleGraph): PNode =
       of mLow:
         result = newIntNodeT(firstOrd(g.config, n.sons[1].typ), n, g)
       of mHigh:
-        if skipTypes(n.sons[1].typ, abstractVar).kind notin
+        if skipTypes(n.sons[1].typ, abstractVar+{tyUserTypeClassInst}).kind notin
             {tySequence, tyString, tyCString, tyOpenArray, tyVarargs}:
           result = newIntNodeT(lastOrd(g.config, skipTypes(n[1].typ, abstractVar)), n, g)
         else:

compiler/semstmts.nim

@@ -519,7 +519,9 @@ proc semVarOrLet(c: PContext, n: PNode, symkind: TSymKind): PNode =
         localError(c.config, a.info, errWrongNumberOfVariables)
       b = newNodeI(nkVarTuple, a.info)
       newSons(b, length)
-      b.sons[length-2] = a.sons[length-2] # keep type desc for doc generator
+      # keep type desc for doc generator
+      # NOTE: at the moment this is always ast.emptyNode, see parser.nim
+      b.sons[length-2] = a.sons[length-2]
       b.sons[length-1] = def
       addToVarSection(c, result, n, b)
     elif tup.kind == tyTuple and def.kind in {nkPar, nkTupleConstr} and
@@ -558,7 +560,12 @@ proc semVarOrLet(c: PContext, n: PNode, symkind: TSymKind): PNode =
           # keep documentation information:
           b.comment = a.comment
         addSon(b, newSymNode(v))
-        addSon(b, a.sons[length-2])      # keep type desc for doc generator
+        # keep type desc for doc generator, but only if the user explicitly
+        # added it
+        if a.sons[length-2].kind != nkEmpty:
+          addSon(b, newNodeIT(nkType, a.info, typ))
+        else:
+          addSon(b, a.sons[length-2])
         addSon(b, copyTree(def))
         addToVarSection(c, result, n, b)
       else:

compiler/sighashes.nim

@@ -189,18 +189,19 @@ proc hashType(c: var MD5Context, t: PType; flags: set[ConsiderFlag]) =
         c.hashTypeSym(t.sym)
       else:
         c.hashSym(t.sym)
-      if sfAnon in t.sym.flags:
+      if {sfAnon, sfGenSym} * t.sym.flags != {}:
         # generated object names can be identical, so we need to
         # disambiguate furthermore by hashing the field types and names:
         # mild hack to prevent endless recursions (makes nimforum compile again):
-        excl t.sym.flags, sfAnon
+        let oldFlags = t.sym.flags
+        t.sym.flags = t.sym.flags - {sfAnon, sfGenSym}
         let n = t.n
         for i in 0 ..< n.len:
           assert n[i].kind == nkSym
           let s = n[i].sym
           c.hashSym s
           c.hashType s.typ, flags
-        incl t.sym.flags, sfAnon
+        t.sym.flags = oldFlags
     else:
       c &= t.id
     if t.len > 0 and t.sons[0] != nil:

compiler/types.nim

@@ -615,7 +615,7 @@ proc firstOrd*(conf: ConfigRef; t: PType): BiggestInt =
     else:
       assert(t.n.sons[0].kind == nkSym)
       result = t.n.sons[0].sym.position
-  of tyGenericInst, tyDistinct, tyTypeDesc, tyAlias, tyStatic, tyInferred:
+  of tyGenericInst, tyDistinct, tyTypeDesc, tyAlias, tyStatic, tyInferred, tyUserTypeClassInst:
     result = firstOrd(conf, lastSon(t))
   of tyOrdinal:
     if t.len > 0: result = firstOrd(conf, lastSon(t))

lib/pure/httpclient.nim

@@ -1184,7 +1184,7 @@ proc request*(client: HttpClient | AsyncHttpClient, url: string,
   ## Connects to the hostname specified by the URL and performs a request
   ## using the custom method string specified by ``httpMethod``.
   ##
-  ## Connection will kept alive. Further requests on the same ``client`` to
+  ## Connection will be kept alive. Further requests on the same ``client`` to
   ## the same hostname will not require a new connection to be made. The
   ## connection can be closed by using the ``close`` procedure.
   ##

lib/pure/terminal.nim

@@ -542,7 +542,9 @@ type
     fgBlue,                ## blue
     fgMagenta,             ## magenta
     fgCyan,                ## cyan
-    fgWhite                ## white
+    fgWhite,               ## white
+    fg8Bit,                ## 256-color (not supported, see ``enableTrueColors`` instead.)
+    fgDefault              ## default terminal foreground color
 
   BackgroundColor* = enum  ## terminal's background colors
     bgBlack = 40,          ## black
@@ -552,28 +554,40 @@ type
     bgBlue,                ## blue
     bgMagenta,             ## magenta
     bgCyan,                ## cyan
-    bgWhite                ## white
+    bgWhite,               ## white
+    bg8Bit,                ## 256-color (not supported, see ``enableTrueColors`` instead.)
+    bgDefault              ## default terminal background color
 
 {.deprecated: [TForegroundColor: ForegroundColor,
                TBackgroundColor: BackgroundColor].}
 
+when defined(windows):
+  var defaultForegroundColor, defaultBackgroundColor: int16 = 0xFFFF'i16 # Default to an invalid value 0xFFFF
+
 proc setForegroundColor*(f: File, fg: ForegroundColor, bright=false) =
   ## Sets the terminal's foreground color.
   when defined(windows):
     let h = conHandle(f)
     var old = getAttributes(h) and not FOREGROUND_RGB
+    if defaultForegroundColor == 0xFFFF'i16:
+      defaultForegroundColor = old
     old = if bright: old or FOREGROUND_INTENSITY
           else:      old and not(FOREGROUND_INTENSITY)
     const lookup: array[ForegroundColor, int] = [
-      0,
+      0, # ForegroundColor enum with ordinal 30
       (FOREGROUND_RED),
       (FOREGROUND_GREEN),
       (FOREGROUND_RED or FOREGROUND_GREEN),
       (FOREGROUND_BLUE),
       (FOREGROUND_RED or FOREGROUND_BLUE),
       (FOREGROUND_BLUE or FOREGROUND_GREEN),
-      (FOREGROUND_BLUE or FOREGROUND_GREEN or FOREGROUND_RED)]
+      (FOREGROUND_BLUE or FOREGROUND_GREEN or FOREGROUND_RED),
-    discard setConsoleTextAttribute(h, toU16(old or lookup[fg]))
+      0, # fg8Bit not supported, see ``enableTrueColors`` instead.
+      0] # unused
+    if fg == fgDefault:
+      discard setConsoleTextAttribute(h, toU16(old or defaultForegroundColor))
+    else:
+      discard setConsoleTextAttribute(h, toU16(old or lookup[fg]))
   else:
     gFG = ord(fg)
     if bright: inc(gFG, 60)
@@ -584,18 +598,25 @@ proc setBackgroundColor*(f: File, bg: BackgroundColor, bright=false) =
   when defined(windows):
     let h = conHandle(f)
     var old = getAttributes(h) and not BACKGROUND_RGB
+    if defaultBackgroundColor == 0xFFFF'i16:
+      defaultBackgroundColor = old
     old = if bright: old or BACKGROUND_INTENSITY
           else:      old and not(BACKGROUND_INTENSITY)
     const lookup: array[BackgroundColor, int] = [
-      0,
+      0, # BackgroundColor enum with ordinal 40
       (BACKGROUND_RED),
       (BACKGROUND_GREEN),
       (BACKGROUND_RED or BACKGROUND_GREEN),
       (BACKGROUND_BLUE),
       (BACKGROUND_RED or BACKGROUND_BLUE),
       (BACKGROUND_BLUE or BACKGROUND_GREEN),
-      (BACKGROUND_BLUE or BACKGROUND_GREEN or BACKGROUND_RED)]
+      (BACKGROUND_BLUE or BACKGROUND_GREEN or BACKGROUND_RED),
-    discard setConsoleTextAttribute(h, toU16(old or lookup[bg]))
+      0, # bg8Bit not supported, see ``enableTrueColors`` instead.
+      0] # unused
+    if bg == bgDefault:
+      discard setConsoleTextAttribute(h, toU16(old or defaultBackgroundColor))
+    else:
+      discard setConsoleTextAttribute(h, toU16(old or lookup[bg]))
   else:
     gBG = ord(bg)
     if bright: inc(gBG, 60)
@@ -935,3 +956,6 @@ when not defined(testing) and isMainModule:
   stdout.styledWrite(fgGreen, "green text")
   echo ""
   echo "ordinary text"
+  stdout.styledWriteLine(fgRed, "red text ", styleBright, "bold red", fgDefault, " bold text")
+  stdout.styledWriteLine(bgYellow, "text in yellow bg", styleBright, " bold text in yellow bg", bgDefault, " bold text")
+  echo "ordinary text"

lib/pure/times.nim

@@ -238,11 +238,11 @@ proc utcZoneInfoFromUtc(time: Time): ZonedTime {.tags: [], raises: [], benign .}
 proc utcZoneInfoFromTz(adjTime: Time): ZonedTime {.tags: [], raises: [], benign .}
 proc localZoneInfoFromUtc(time: Time): ZonedTime {.tags: [], raises: [], benign .}
 proc localZoneInfoFromTz(adjTime: Time): ZonedTime {.tags: [], raises: [], benign .}
-proc initTime*(unix: int64, nanosecond: NanosecondRange): Time 
+proc initTime*(unix: int64, nanosecond: NanosecondRange): Time
   {.tags: [], raises: [], benign noSideEffect.}
 
 proc initDuration*(nanoseconds, microseconds, milliseconds,
-                   seconds, minutes, hours, days, weeks: int64 = 0): Duration 
+                   seconds, minutes, hours, days, weeks: int64 = 0): Duration
   {.tags: [], raises: [], benign noSideEffect.}
 
 proc nanosecond*(time: Time): NanosecondRange =
@@ -531,7 +531,7 @@ proc `$`*(dur: Duration): string =
     let quantity = numParts[unit]
     if quantity != 0.int64:
       parts.add(stringifyUnit(quantity, $unit))
-  
+
   result = humanizeParts(parts)
 
 proc `+`*(a, b: Duration): Duration {.operator.} =
@@ -1243,23 +1243,23 @@ proc evaluateStaticInterval(interval: TimeInterval): Duration =
     minutes = interval.minutes,
     hours = interval.hours)
 
-proc between*(startDt, endDt:DateTime): TimeInterval =
+proc between*(startDt, endDt: DateTime): TimeInterval =
   ## Evaluate difference between two dates in ``TimeInterval`` format, so, it
   ## will be relative.
   ##
-  ## **Warning:** It's not recommended to use ``between`` for ``DateTime's`` in 
+  ## **Warning:** It's not recommended to use ``between`` for ``DateTime's`` in
-  ## different ``TimeZone's``.  
+  ## different ``TimeZone's``.
   ## ``a + between(a, b) == b`` is only guaranteed when ``a`` and ``b`` are in UTC.
   runnableExamples:
-    var a = initDateTime(year = 2018, month = Month(3), monthday = 25, 
+    var a = initDateTime(year = 2018, month = Month(3), monthday = 25,
                      hour = 0, minute = 59, second = 59, nanosecond = 1,
                      zone = utc()).local
-    var b = initDateTime(year = 2018, month = Month(3), monthday = 25, 
+    var b = initDateTime(year = 2018, month = Month(3), monthday = 25,
                      hour = 1, minute =  1, second =  1, nanosecond = 0,
                      zone = utc()).local
     doAssert between(a, b) == initTimeInterval(
       nanoseconds=999, milliseconds=999, microseconds=999, seconds=1, minutes=1)
-    
+
     a = parse("2018-01-09T00:00:00+00:00", "yyyy-MM-dd'T'HH:mm:sszzz", utc())
     b = parse("2018-01-10T23:00:00-02:00", "yyyy-MM-dd'T'HH:mm:sszzz")
     doAssert between(a, b) == initTimeInterval(hours=1, days=2)
@@ -1526,7 +1526,6 @@ proc formatToken(dt: DateTime, token: string, buf: var string) =
   else:
     raise newException(ValueError, "Invalid format string: " & token)
 
-
 proc format*(dt: DateTime, f: string): string {.tags: [].}=
   ## This procedure formats `dt` as specified by `f`. The following format
   ## specifiers are available:
@@ -1601,18 +1600,14 @@ proc format*(dt: DateTime, f: string): string {.tags: [].}=
     inc(i)
   formatToken(dt, currentF, result)
 
-proc format*(time: Time, f: string, zone_info: proc(t: Time): DateTime): string {.tags: [].} =
+proc format*(time: Time, f: string, zone: Timezone = local()): string {.tags: [].} =
-  ## converts a `Time` value to a string representation. It will use format from
+  ## Converts a `Time` value to a string representation. It will use format from
   ## ``format(dt: DateTime, f: string)``.
   runnableExamples:
-    var dt = initDateTime(01, mJan, 1970, 00, 00, 00, local())
+    var dt = initDateTime(01, mJan, 1970, 00, 00, 00, utc())
     var tm = dt.toTime()
-    doAssert format(tm, "yyyy-MM-dd'T'HH:mm:ss", local) == "1970-01-01T00:00:00"
+    doAssert format(tm, "yyyy-MM-dd'T'HH:mm:ss", utc()) == "1970-01-01T00:00:00"
-    dt = initDateTime(01, mJan, 1970, 00, 00, 00, utc())
+  time.inZone(zone).format(f)
-    tm = dt.toTime()
-    doAssert format(tm, "yyyy-MM-dd'T'HH:mm:ss", utc) == "1970-01-01T00:00:00"
-
-  zone_info(time).format(f)
 
 proc `$`*(dt: DateTime): string {.tags: [], raises: [], benign.} =
   ## Converts a `DateTime` object to a string representation.
@@ -1984,16 +1979,12 @@ proc countYearsAndDays*(daySpan: int): tuple[years: int, days: int] =
 proc toTimeInterval*(time: Time): TimeInterval =
   ## Converts a Time to a TimeInterval.
   ##
-  ## To be used when diffing times.
+  ## To be used when diffing times. Consider using `between` instead.
   runnableExamples:
     let a = fromUnix(10)
-    let dt = initDateTime(01, mJan, 1970, 00, 00, 00, local())
+    let b = fromUnix(1_500_000_000)
-    doAssert a.toTimeInterval() == initTimeInterval(
+    let ti = b.toTimeInterval() - a.toTimeInterval()
-      years=1970, days=1, seconds=10, hours=convert(
+    doAssert a + ti == b
-        Seconds, Hours, -dt.utcOffset
-      )
-    )
-
   var dt = time.local
   initTimeInterval(dt.nanosecond, 0, 0, dt.second, dt.minute, dt.hour,
     dt.monthday, 0, dt.month.ord - 1, dt.year)
@@ -2150,7 +2141,7 @@ proc timeToTimeInterval*(t: Time): TimeInterval {.deprecated.} =
   t.toTimeInterval()
 
 proc getDayOfWeek*(day, month, year: int): WeekDay  {.tags: [], raises: [], benign, deprecated.} =
-  ## **Deprecated since v0.18.0:** use 
+  ## **Deprecated since v0.18.0:** use
   ## ``getDayOfWeek(monthday: MonthdayRange; month: Month; year: int)`` instead.
   getDayOfWeek(day, month.Month, year)
 

lib/std/varints.nim

@@ -19,7 +19,7 @@ proc readVu64*(z: openArray[byte]; pResult: var uint64): int =
     return 1
   if z[0] <= 248:
     if z.len < 2: return 0
-    pResult = (uint64 z[0] - 241) * 256 + uint64 z[1] + 240
+    pResult = (uint64 z[0] - 241) * 256 + z[1].uint64 + 240
     return 2
   if z.len < int(z[0]-246): return 0
   if z[0] == 249:
@@ -135,6 +135,13 @@ when isMainModule:
     if encodeZigzag(decodeZigzag(test)) != test:
       echo "Failure for ", test, " ", encodeZigzag(decodeZigzag(test)), " ", decodeZigzag(test)
 
+  for test in 0u64..300u64:
+    let wrLen = writeVu64(dest, test)
+    let rdLen = readVu64(dest, got)
+    assert wrLen == rdLen
+    if got != test:
+      echo "BUG! expected: ", test, " got: ", got, " z0: ", dest[0]
+
   # check this also works for floats:
   for test in [0.0, 0.1, 2.0, +Inf, Nan, NegInf]:
     let t = cast[uint64](test)

tests/arithm/tnot.nim

@@ -0,0 +1,58 @@
+discard """
+  output: '''
+-5
+-5
+-5
+-5
+4
+4
+4
+4
+251
+65531
+4294967291
+18446744073709551611
+4
+4
+4
+4
+'''
+"""
+
+# Signed types
+block:
+  const t0: int8  = not 4
+  const t1: int16 = not 4
+  const t2: int32 = not 4
+  const t3: int64 = not 4
+  const t4: int8  = not -5
+  const t5: int16 = not -5
+  const t6: int32 = not -5
+  const t7: int64 = not -5
+  echo t0
+  echo t1
+  echo t2
+  echo t3
+  echo t4
+  echo t5
+  echo t6
+  echo t7
+
+# Unsigned types
+block:
+  const t0: uint8  = not 4'u8
+  const t1: uint16 = not 4'u16
+  const t2: uint32 = not 4'u32
+  const t3: uint64 = not 4'u64
+  const t4: uint8  = not 251'u8
+  const t5: uint16 = not 65531'u16
+  const t6: uint32 = not 4294967291'u32
+  const t7: uint64 = not 18446744073709551611'u64
+  echo t0
+  echo t1
+  echo t2
+  echo t3
+  echo t4
+  echo t5
+  echo t6
+  echo t7

tests/arithm/tshl.nim

@@ -0,0 +1,34 @@
+discard """
+  output: '''
+0
+0
+1
+1
+0
+0
+0
+1
+'''
+"""
+
+# Signed types
+block:
+  const t0: int8  = 1'i8 shl 8
+  const t1: int16 = 1'i16 shl 16
+  const t2: int32 = 1'i32 shl 32
+  const t3: int64 = 1'i64 shl 64
+  echo t0
+  echo t1
+  echo t2
+  echo t3
+
+# Unsigned types
+block:
+  const t0: uint8  = 1'u8 shl 8
+  const t1: uint16 = 1'u16 shl 16
+  const t2: uint32 = 1'u32 shl 32
+  const t3: uint64 = 1'u64 shl 64
+  echo t0
+  echo t1
+  echo t2
+  echo t3

tests/concepts/treversable.nim

@@ -0,0 +1,31 @@
+# issue 7705, 7703, 7702
+discard """
+  output: '''
+z
+e
+  '''
+"""
+
+type
+  Reversable*[T] = concept a
+    a[int] is T
+    a.high is int
+    a.len is int
+    a.low is int
+
+proc get[T](s: Reversable[T], n: int): T =
+  s[n]
+
+proc hi[T](s: Reversable[T]): int =
+  s.high
+
+proc lo[T](s: Reversable[T]): int =
+  s.low
+
+iterator reverse*[T](s: Reversable[T]): T =
+  assert hi(s) - lo(s) == len(s) - 1
+  for z in hi(s).countdown(lo(s)):
+    yield s.get(z)
+
+for s in @["e", "z"].reverse:
+  echo s

tests/types/t7905.nim

@@ -0,0 +1,33 @@
+discard """
+  output: '''
+(member: "hello world")
+(member: 123.456)
+(member: "hello world", x: ...)
+(member: 123.456, x: ...)
+'''
+"""
+
+template foobar(arg: typed): untyped =
+  type
+    MyType = object
+      member: type(arg)
+
+  var myVar: MyType
+  myVar.member = arg
+  echo myVar
+
+foobar("hello world")
+foobar(123.456'f64)
+
+template foobarRec(arg: typed): untyped =
+  type
+    MyType = object
+      member: type(arg)
+      x: ref MyType
+
+  var myVar: MyType
+  myVar.member = arg
+  echo myVar
+
+foobarRec("hello world")
+foobarRec(123.456'f64)