fix nnkAccQuoted entry processing in config-file

fixes #47

confutils/config_file.nim

@@ -66,8 +66,16 @@ proc traversePostfix(postfix: NimNode, typ: NimNode, isDiscriminator: bool,
                      isCommandOrArgument = false, defaultValue = "",
                      namePragma = ""): ConfFileSection =
   postfix.expectKind nnkPostfix
-  traverseIdent(postfix[1], typ, isDiscriminator, isCommandOrArgument,
-                defaultValue, namePragma)
+
+  case postfix[1].kind
+  of nnkIdent:
+    traverseIdent(postfix[1], typ, isDiscriminator, isCommandOrArgument,
+                  defaultValue, namePragma)
+  of nnkAccQuoted:
+    traverseIdent(postfix[1][0], typ, isDiscriminator, isCommandOrArgument,
+                  defaultValue, namePragma)
+  else:
+    raiseAssert "[Postfix] Unsupported child node:\n" & postfix[1].treeRepr
 
 proc shortEnumName(n: NimNode): NimNode =
   if n.kind == nnkDotExpr:
@@ -111,10 +119,14 @@ proc traversePragmaExpr(pragmaExpr: NimNode, typ: NimNode,
   pragmaExpr.expectKind nnkPragmaExpr
   let (isCommandOrArgument, defaultValue, namePragma) =
     traversePragma(pragmaExpr[1])
+
   case pragmaExpr[0].kind
   of nnkIdent:
     traverseIdent(pragmaExpr[0], typ, isDiscriminator, isCommandOrArgument,
                   defaultValue, namePragma)
+  of nnkAccQuoted:
+    traverseIdent(pragmaExpr[0][0], typ, isDiscriminator, isCommandOrArgument,
+                  defaultValue, namePragma)
   of nnkPostfix:
     traversePostfix(pragmaExpr[0], typ, isDiscriminator, isCommandOrArgument,
                     defaultValue, namePragma)
@@ -130,6 +142,8 @@ proc traverseIdentDefs(identDefs: NimNode, parent: ConfFileSection,
     case child.kind
     of nnkIdent:
       result.add traverseIdent(child, typ, isDiscriminator)
+    of nnkAccQuoted:
+      result.add traverseIdent(child[0], typ, isDiscriminator)
     of nnkPostfix:
       result.add traversePostfix(child, typ, isDiscriminator)
     of nnkPragmaExpr:
@@ -146,7 +160,7 @@ proc traverseOfBranch(ofBranch: NimNode, parent: ConfFileSection): ConfFileSecti
   result = ConfFileSection(fieldName: repr(shortEnumName(ofBranch[0])), isCaseBranch: true)
   for child in ofBranch:
     case child.kind:
-    of nnkIdent, nnkDotExpr:
+    of nnkIdent, nnkDotExpr, nnkAccQuoted:
       discard
     of nnkRecList:
       result.children.add traverseRecList(child, result)

tests/test_config_file.nim

@@ -27,6 +27,7 @@ type
 
   VCStartUpCmd = enum
     VCNoCommand
+    `import`
 
   ValidatorKeyPath = TypedInputFile[ValidatorPrivKey, Txt, "privkey"]
 
@@ -98,6 +99,24 @@ type
         desc: "Delay in seconds between retries after unsuccessful attempts to connect to a beacon node"
         name: "retry-delay" }: int
 
+    of `import`:
+
+      blocksFile* {.
+        argument
+        desc: "Import RLP encoded block(s) from a file, validate, write to database and quit"
+        defaultValue: ""
+        name: "blocks-file" }: InputFile
+
+      `type`* {.
+        desc: "Test nnkAccQuoted of public sub command entry"
+        defaultValue: ""
+        name: "import-type" }: string
+
+      `seq` {.
+        desc: "Test nnkAccQuoted of private sub command entry"
+        defaultValue: ""
+        name: "import-seq" }: string
+
 func defaultDataDir(conf: TestConf): string =
   discard