Clonkk fix2 11923 (#19451)

* fix nnkBracketExpr not compiling for getImpl on customPragmaNode

* fix test import

* fix alias not working with hasCustomPragmas

(cherry picked from commit 486cb09)

lib/core/macros.nim

@@ -1521,6 +1521,22 @@ macro expandMacros*(body: typed): untyped =
   echo body.toStrLit
   result = body
 
+proc extractTypeImpl(n: NimNode): NimNode =
+    ## attempts to extract the type definition of the given symbol
+    case n.kind
+    of nnkSym: # can extract an impl
+      result = n.getImpl.extractTypeImpl()
+    of nnkObjectTy, nnkRefTy, nnkPtrTy: result = n
+    of nnkBracketExpr:
+      if n.typeKind == ntyTypeDesc:
+        result = n[1].extractTypeImpl()
+      else:
+        doAssert n.typeKind == ntyGenericInst
+        result = n[0].getImpl()
+    of nnkTypeDef:
+      result = n[2]
+    else: error("Invalid node to retrieve type implementation of: " & $n.kind)
+
 proc customPragmaNode(n: NimNode): NimNode =
   expectKind(n, {nnkSym, nnkDotExpr, nnkBracketExpr, nnkTypeOfExpr, nnkCheckedFieldExpr})
   let
@@ -1529,7 +1545,10 @@ proc customPragmaNode(n: NimNode): NimNode =
   if typ.kind == nnkBracketExpr and typ.len > 1 and typ[1].kind == nnkProcTy:
     return typ[1][1]
   elif typ.typeKind == ntyTypeDesc:
-    let impl = typ[1].getImpl()
+    let impl = getImpl(
+      if kind(typ[1]) == nnkBracketExpr: typ[1][0]
+      else: typ[1]
+    )
     if impl[0].kind == nnkPragmaExpr:
       return impl[0][1]
     else:
@@ -1552,14 +1571,12 @@ proc customPragmaNode(n: NimNode): NimNode =
     let name = $(if n.kind == nnkCheckedFieldExpr: n[0][1] else: n[1])
     let typInst = getTypeInst(if n.kind == nnkCheckedFieldExpr or n[0].kind == nnkHiddenDeref: n[0][0] else: n[0])
     var typDef = getImpl(
-      if typInst.kind == nnkVarTy or
-         typInst.kind == nnkBracketExpr:
-        typInst[0]
+      if typInst.kind in {nnkVarTy, nnkBracketExpr}: typInst[0]
       else: typInst
     )
     while typDef != nil:
       typDef.expectKind(nnkTypeDef)
-      let typ = typDef[2]
+      let typ = typDef[2].extractTypeImpl()
       typ.expectKind({nnkRefTy, nnkPtrTy, nnkObjectTy})
       let isRef = typ.kind in {nnkRefTy, nnkPtrTy}
       if isRef and typ[0].kind in {nnkSym, nnkBracketExpr}: # defines ref type for another object(e.g. X = ref X)

tests/pragmas/tcustom_pragma.nim

@@ -20,16 +20,22 @@ block:
     MyGenericObj[T] = object
       myField1, myField2 {.myAttr: "hi".}: int
 
+    MyOtherObj = MyObj
+
 
   var o: MyObj
   static:
     doAssert o.myField2.hasCustomPragma(myAttr)
     doAssert(not o.myField1.hasCustomPragma(myAttr))
+    doAssert(not o.myField1.hasCustomPragma(MyObj))
+    doAssert(not o.myField1.hasCustomPragma(MyOtherObj))
 
   var ogen: MyGenericObj[int]
   static:
     doAssert ogen.myField2.hasCustomPragma(myAttr)
     doAssert(not ogen.myField1.hasCustomPragma(myAttr))
+    doAssert(not ogen.myField1.hasCustomPragma(MyGenericObj))
+    doAssert(not ogen.myField1.hasCustomPragma(MyGenericObj))
 
 
 import custom_pragma