fixes #10702 (#10705)

* --define:nimQuirky exception handling for Nim; in preparation of a blog post
* make it work with latest system.nim
* make code more readable
* fixes #10702

tests/macros/tmacrotypes.nim

@@ -14,10 +14,10 @@ macro checkType(ex: typed; expected: string): untyped =
 macro checkProcType(fn: typed): untyped =
   let fn_sym = if fn.kind == nnkProcDef: fn[0] else: fn
   echo fn_sym, "; ", fn_sym.typeKind, "; ", fn_sym.getType.repr, "; ", fn_sym.getTypeImpl.repr
-  
+
 
 proc voidProc = echo "hello"
-proc intProc(a: int, b: float): int {.checkProcType.} = 10 
+proc intProc(a: int, b: float): int {.checkProcType.} = 10
 
 checkType(voidProc(), "void")
 checkType(intProc(10, 20.0), "int")
@@ -38,3 +38,33 @@ block:
     Club = Blub
 
   static: doAssert(c == 1)
+
+# bug #10702
+type
+  VectorElementType = SomeNumber | bool
+  Vec*[N : static[int], T: VectorElementType] = object
+    arr*: array[N, T]
+
+type
+  Vec4*[T: VectorElementType] = Vec[4,T]
+  Vec3*[T: VectorElementType] = Vec[3,T]
+  Vec2*[T: VectorElementType] = Vec[2,T]
+
+template vecGen(U:untyped,V:typed):typed=
+  ## ``U`` suffix
+  ## ``V`` valType
+  ##
+  type
+    `Vec2 U`* {.inject.} = Vec2[V]
+    `Vec3 U`* {.inject.} = Vec3[V]
+    `Vec4 U`* {.inject.} = Vec4[V]
+
+vecGen(f, float32)
+
+macro foobar(arg: typed): untyped =
+  let typ = arg.getTypeInst
+  doAssert typ.getImpl[^1].kind == nnkCall
+
+var x: Vec2f
+
+foobar(x)