test case haul to prevent pileup

closes nim-lang#6013, closes nim-lang#7009, closes nim-lang#9190, closes nim-lang#12487, closes nim-lang#12831, closes nim-lang#13184, closes nim-lang#13252, closes nim-lang#14860, closes nim-lang#14877, closes nim-lang#14894, closes nim-lang#14917, closes nim-lang#16153, closes nim-lang#16439, closes nim-lang#17779, closes nim-lang#18074, closes nim-lang#18202, closes nim-lang#18314, closes nim-lang#18648, closes nim-lang#19063, closes nim-lang#19446, closes nim-lang#20065, closes nim-lang#20367, closes nim-lang#22126, closes nim-lang#22820, closes nim-lang#22888, closes nim-lang#23020, closes nim-lang#23287, closes nim-lang#23510

tests/array/tgenericindex.nim

@@ -0,0 +1,7 @@
+block: # issue #13184
+  type
+    TypeClass = uint | enum | int
+    ArrayAlias[I: TypeClass] = array[I, int]
+
+  proc test[I: TypeClass](points: ArrayAlias[I]) =
+    discard

tests/cpp/timportedtypecrash.nim

@@ -0,0 +1,15 @@
+discard """
+  action: compile
+  targets: "cpp"
+  matrix: "--compileOnly"
+"""
+
+# issue #20065
+
+type
+  Foo* {.importC, nodecl.} = object # doesn't matter if this is importC or importCpp
+    value*: int64
+  Bar* {.importCpp, nodecl.} = object # no segfault with importC
+    foo*: Foo
+
+discard @[Bar()]

tests/errmsgs/mambtype1.nim

@@ -0,0 +1 @@
+type Y* = object

tests/errmsgs/mambtype2.nim

@@ -0,0 +1 @@
+type Y* = object

tests/errmsgs/tambtype.nim

@@ -0,0 +1,14 @@
+# issue #23510
+
+import ./mambtype1
+import ./mambtype2
+
+proc u(d: int | int) =
+  var r: Y #[tt.Error
+         ^ ambiguous identifier: 'Y' -- use one of the following:
+  mambtype1.Y: Y
+  mambtype2.Y: Y]#
+  static: doAssert r is j.Y  # because j is imported first
+  doAssert r is j.Y
+
+u(0)

tests/errmsgs/ttemplateaslambda.nim

@@ -0,0 +1,6 @@
+# issue #16439
+
+import std/[strutils, sequtils]
+var data = "aaa aaa"
+echo data.split(" ").map(toSeq) #[tt.Error
+                    ^ type mismatch: got <seq[string], template (iter: untyped): untyped>]#

tests/generics/ttemplateparamcall.nim

@@ -0,0 +1,47 @@
+discard """
+  output: '''
+L
+L
+L
+L
+B
+B
+B
+B
+'''
+"""
+
+# issue #18202
+
+type
+  R = object
+  S = object
+  U = R | S
+
+  L = object
+  B = object
+  C = B | L
+
+proc f(n: L, q: R | S) = echo "L"
+proc f(n: B, q: R | S) = echo "B"
+
+proc g(n: C, q: R | S) = echo (when n is L: "L" else: "B")
+
+proc h(n: L, q: U) = echo "L"
+proc h(n: B, q: U) = echo "B"
+
+proc j(n: C, q: U) = echo (when n is L: "L" else: "B")
+
+proc e(n: B | L, a: R) =
+  template t(operations: untyped, fn: untyped) = fn(n, operations)
+
+  # Work as expected
+  t(a, f)
+  t(a, g)
+  t(a, j)
+
+  # Error: type mismatch: got <R, proc [*missing parameters*](n: B, q: U) | proc [*missing parameters*](n: L, q: U)>
+  t(a, h)
+
+e(L(), R())
+e(B(), R())

tests/generics/tuninstantiatedgenericcalls.nim

@@ -353,6 +353,11 @@ block: # issue #15959
   my3(x, x)
   doAssert not compiles(my3(x, x[0]))
 
+block: # issue #14877
+  proc fn[T](a: T, index: int): typeof(a.x) = a.x # ok
+  proc fn2(a: seq[int], index: int): typeof(a[0]) = a[index] # ok
+  proc fn3[T](a: T, index: int): typeof(a[0]) = a[index] # Error: type mismatch: got <T, int literal(0)>
+
 block: # issue #22342, type section version of #22607
   type GenAlias[isInt: static bool] = (
     when isInt:
@@ -515,3 +520,37 @@ block: # issue #16175
   var s = Thing[1]()
   doAssert s.kid is Thing[0.uint]
   doAssert s.kid.kid is char
+
+block: # issue #23287
+  template emitTupleType(trait: typedesc): untyped =
+    trait
+
+  type
+    Traitor[Traits] = ref object of RootObj ##
+      vtable: emitTupleType(Traits)
+
+  type Generic[X] = object
+
+  proc test2[Traits](val: Traitor[Generic[Traits]]) =
+    static: assert val.vtable is Generic[int]
+
+  proc test[X](val: Traitor[Generic[X]]) = discard
+
+  test2 Traitor[Generic[int]]() # This should error,  but passes
+  test Traitor[Generic[int]]()
+
+block: # issue #20367, example 1
+  template someTemp(T:type):typedesc = T
+  type
+    Foo[T2] = someTemp(T2)
+    Bar[T1] = Foo[T1]
+  var u:Foo[float] # works
+  var v:Bar[float] # Error: invalid type: 'None' in this context: 'Bar[system.float]' for var
+
+block: # issue #20367, example 2
+  template someOtherTemp(p:static[int]):untyped = array[p,int]
+  type
+    Foo2[n:static[int]] = someOtherTemp(n)
+    Bar2[m:static[int]] = Foo2[m]
+  var x:Foo2[1] # works
+  var y:Bar2[1] # Error: undeclared identifier: 'n'

tests/iter/tnestedclosures.nim

@@ -137,3 +137,22 @@ block: #3824
       echo x
 
   main()
+
+block: # issue #12487
+  iterator FaiReader(): string {.closure.} =
+    yield "something"
+
+  template toClosure(i): auto =
+    iterator j: string {.closure.} =
+      for x in FaiReader():
+        yield x
+    j
+
+  proc main = 
+    var reader = toClosure(FaiReader())
+    var s: seq[string] = @[]
+    for x in reader():
+      s.add(x)
+    doAssert s == @["something"]
+
+  main()

tests/iter/tsubscript.nim

@@ -0,0 +1,10 @@
+# issue #14860
+
+type
+  Dummie = object
+
+iterator `[]`(d: Dummie, a, b: int): int = discard
+
+let d = Dummie()
+
+for s in d[0, 1]: discard # error here

tests/lexer/titerwrongexport.nim

@@ -0,0 +1,6 @@
+# issue #19063
+
+iterator items[T]*(s: seq[T]): T = #[tt.Error
+                 ^ invalid indentation; an export marker '*' follows the declared identifier]#
+  for i in  system.items(s):
+    yield i

tests/macros/ttypedsymchoice.nim

@@ -0,0 +1,18 @@
+# issue #12831
+
+import std/[macros, strutils]
+
+macro dumpRepr(x: typed): untyped =
+  result = newLit(x.treeRepr & "\n")
+doAssert dumpRepr(`$`).startsWith("ClosedSymChoice")
+
+# issue #19446
+
+macro typedVarargs(x: varargs[typed]): untyped =
+  result = newLit($x[0].kind)
+
+macro typedSingle(x: typed): untyped =
+  result = newLit($x.kind)
+
+doAssert typedSingle(len) == "nnkClosedSymChoice"
+doAssert typedVarargs(len) == "nnkClosedSymChoice"

tests/overload/tsubtypegenericconstraint.nim

@@ -0,0 +1,23 @@
+block: # issue #18314, case 1
+  type
+    A = ref object of RootObj
+    B = ref object of A
+    C = ref object of B
+
+  proc foo[T: A](a: T) = echo "got A"
+  proc foo[T: B](b: T) = echo "got B"
+
+  var c = C()
+  foo(c)
+
+block: # issue #18314, case 2
+  type
+    A = ref object of RootObj
+    B = ref object of A
+    C = ref object of B
+
+  proc foo[T: A](a: T) = echo "got A"
+  proc foo(b: B) = echo "got B"
+
+  var c = C()
+  foo(c)

tests/proc/msugarcrash1.nim

@@ -0,0 +1,8 @@
+import std/options
+
+type
+  Address* = object
+    port*: int
+
+  Node* = ref object
+    address*: Option[Address]

tests/proc/tdefaultprocparam.nim

@@ -88,3 +88,9 @@ proc foo(a = 0, b = a.high, c = high(typeof(a))) =
 
 foo()
 
+import std/strformat
+
+block: # issue #18074
+  proc somefn[T](query: string, _: type[T], message = query) = discard
+  somefn(fmt"", string)
+

tests/proc/tdefaultvalueconv.nim

@@ -0,0 +1,10 @@
+# issue #22126
+
+func foo[T](arr: openArray[T], idx: Natural = arr.high): int = # missed conversion: `Natural(arr.high)`
+  if idx == 0:
+    return 0
+  foo(arr, idx - 1)
+
+let arr = [0, 1, 2]
+
+doAssert foo(arr) == 0

tests/proc/texplicitgenericconstraint.nim

@@ -0,0 +1,14 @@
+# issue #23020
+
+proc n[T: bool](k: int | int) =
+  #static:
+  #  doAssert T is bool
+  #  doAssert T isnot int
+
+  # And runtime
+  block:
+    doAssert T is bool
+    doAssert T isnot int
+
+n[int](0) #[tt.Error
+      ^ type mismatch: got <int literal(0)>]#

tests/proc/texplicitgenerics.nim

@@ -61,3 +61,19 @@ block: # explicit generic with unresolved generic param, https://forum.nim-lang.
   var x = [1, 1]
   discard MyMedian(x) # emits "1\n"
   doAssert s == @["1"]
+
+block: # issue #16153
+  type
+    X[T] = openArray[T] | varargs[T] | seq[T]
+    Y[T] = ref object
+      dll: T
+
+  proc initY[T](): Y[T] =
+    new(result)
+
+  proc initY[T](v: X[T]): Y[T] =
+    new(result)
+    for e in v:
+      echo e
+
+  var deque: Y[int] = initY[int]()

tests/proc/tstaticsignature.nim

@@ -135,6 +135,22 @@ block: # issue #7008
   explicitGenericProc1(n, 5) # works
   explicitGenericProc2(n, 5) # doesn't
 
+block: # issue #7009
+  type Node[T] = object
+    val: T
+
+  proc genericProc(s: Node; key: s.T) =
+    discard # body doesn't matter
+  proc explicitGenericProc[T](s: Node[T]; key: T) =
+    discard # body doesn't matter
+  proc concreteProc(s: Node[cstring]; key: s.T) =
+    discard # body doesn't matter 
+
+  var strs: Node[cstring]
+  concreteProc(strs, "string") # string converts to cstring
+  explicitGenericProc(strs, "string") # still converts
+  genericProc(strs, "string") # doesn't convert: COMPILE ERROR
+
 block: # issue #20027
   block:
     type Test[T] = object
@@ -266,3 +282,9 @@ block: # issue #22276
     a = x * 2)
   doAssert a == 18
   foo(B, proc (x: float) = doAssert x == 9)
+
+block: # issue #9190
+  func foo[T, U]: type(T.low + U.low) = 
+    T.low + U.low
+
+  doAssert foo[int, int]() == int.low

tests/proc/tsugarcrash1.nim

@@ -0,0 +1,13 @@
+# issue #22820
+
+{.push raises: [].}
+
+import
+  "."/[msugarcrash1]
+
+import
+  std/[options, sugar]
+
+var closestNodes: seq[Node]
+for cn in closestNodes:
+  discard cn.address.map(a => a.port)

tests/proc/twrongdefaultvalue2.nim

@@ -0,0 +1,7 @@
+# issue #22888
+
+proc dummy*[T: SomeNumber](a: T, b: T = 2.5): T = #[tt.Error
+                                        ^ type mismatch: got <float64> but expected 'int']#
+  result = a
+
+echo dummy(2)

tests/range/tintypeclass.nim

@@ -0,0 +1,12 @@
+block: # issue #6013
+  type
+    n16 = range[0'i16..high(int16)]
+    SomeObj = ref object
+
+  proc doSomethingMore(idOrObj: n16 or SomeObj) =
+    discard
+
+  proc doSomething(idOrObj: n16 or SomeObj) =
+    doSomethingMore(idOrObj) # Error: type mismatch: got (int16)
+
+  doSomething(0.n16)

tests/specialops/tmismatch.nim

@@ -0,0 +1,17 @@
+# issue #17779
+
+{.experimental: "dotOperators".}
+
+type
+    Flag = enum
+        A
+
+    Flags = set[Flag]
+
+template `.=`*(flags: Flags, key: Flag, val: bool) =
+    if val: flags.incl key else: flags.excl key
+
+var flags: Flags
+
+flags.A = 123 #[tt.Error
+        ^ undeclared field: 'A=' for type tmismatch.Flags [type declared in tmismatch.nim(9, 5)]]#

tests/template/mdotcall.nim

@@ -80,3 +80,10 @@ macro bindmeQuote*(): untyped =
     var ss = newStringStream("anothertext")
     ss.writeData(tst[0].addr, 2)
     discard ss.readData(tst[0].addr, 2) # <= comment this out to make compilation successful
+
+# issue #14894
+
+proc myProc(s: string) = discard
+
+template myTemplate* =
+  "".myProc