Deprecated pragma is now supported on enum fields (#10113)

* {.deprecated.} pragma is now supported for enum fields
* Add tests
* Simplify code

compiler/parser.nim

@@ -1765,7 +1765,7 @@ proc parseSection(p: var TParser, kind: TNodeKind,
     parMessage(p, errIdentifierExpected, p.tok)
 
 proc parseEnum(p: var TParser): PNode =
-  #| enum = 'enum' optInd (symbol optInd ('=' optInd expr COMMENT?)? comma?)+
+  #| enum = 'enum' optInd (symbol optPragmas optInd ('=' optInd expr COMMENT?)? comma?)+
   result = newNodeP(nkEnumTy, p)
   getTok(p)
   addSon(result, p.emptyNode)
@@ -1775,25 +1775,35 @@ proc parseEnum(p: var TParser): PNode =
   while true:
     var a = parseSymbol(p)
     if a.kind == nkEmpty: return
+
+    var symPragma = a
+    var pragma: PNode
+    if p.tok.tokType == tkCurlyDotLe:
+      pragma = optPragmas(p)
+      symPragma = newNodeP(nkPragmaExpr, p)
+      addSon(symPragma, a)
+      addSon(symPragma, pragma)
+
     if p.tok.indent >= 0 and p.tok.indent <= p.currInd:
-      add(result, a)
+      add(result, symPragma)
       break
+
     if p.tok.tokType == tkEquals and p.tok.indent < 0:
       getTok(p)
-      optInd(p, a)
-      var b = a
-      a = newNodeP(nkEnumFieldDef, p)
-      addSon(a, b)
-      addSon(a, parseExpr(p))
+      optInd(p, symPragma)
+      var b = symPragma
+      symPragma = newNodeP(nkEnumFieldDef, p)
+      addSon(symPragma, b)
+      addSon(symPragma, parseExpr(p))
       if p.tok.indent < 0 or p.tok.indent >= p.currInd:
-        rawSkipComment(p, a)
+        rawSkipComment(p, symPragma)
     if p.tok.tokType == tkComma and p.tok.indent < 0:
       getTok(p)
-      rawSkipComment(p, a)
+      rawSkipComment(p, symPragma)
     else:
       if p.tok.indent < 0 or p.tok.indent >= p.currInd:
-        rawSkipComment(p, a)
-    addSon(result, a)
+        rawSkipComment(p, symPragma)
+    addSon(result, symPragma)
     if p.tok.indent >= 0 and p.tok.indent <= p.currInd or
         p.tok.tokType == tkEof:
       break

compiler/pragmas.nim

@@ -73,6 +73,7 @@ const
                       wThread, wRaises, wLocks, wTags, wGcSafe}
   forVarPragmas* = {wInject, wGensym}
   allRoutinePragmas* = methodPragmas + iteratorPragmas + lambdaPragmas
+  enumFieldPragmas* = {wDeprecated}
 
 proc getPragmaVal*(procAst: PNode; name: TSpecialWord): PNode =
   let p = procAst[pragmasPos]

compiler/semtypes.nim

@@ -80,9 +80,14 @@ proc semEnum(c: PContext, n: PNode, prev: PType): PType =
   if isPure: initStrTable(symbols)
   var hasNull = false
   for i in countup(1, sonsLen(n) - 1):
+    if n.sons[i].kind == nkEmpty: continue
     case n.sons[i].kind
     of nkEnumFieldDef:
-      e = newSymS(skEnumField, n.sons[i].sons[0], c)
+      if n.sons[i].sons[0].kind == nkPragmaExpr:
+        e = newSymS(skEnumField, n.sons[i].sons[0].sons[0], c)
+        pragma(c, e, n.sons[i].sons[0].sons[1], enumFieldPragmas)
+      else:
+        e = newSymS(skEnumField, n.sons[i].sons[0], c)
       var v = semConstExpr(c, n.sons[i].sons[1])
       var strVal: PNode = nil
       case skipTypes(v.typ, abstractInst-{tyTypeDesc}).kind
@@ -115,6 +120,9 @@ proc semEnum(c: PContext, n: PNode, prev: PType): PType =
       e = n.sons[i].sym
     of nkIdent, nkAccQuoted:
       e = newSymS(skEnumField, n.sons[i], c)
+    of nkPragmaExpr:
+      e = newSymS(skEnumField, n.sons[i].sons[0], c)
+      pragma(c, e, n.sons[i].sons[1], enumFieldPragmas)
     else:
       illFormedAst(n[i], c.config)
     e.typ = result

tests/enum/tenumfieldpragma.nim

@@ -0,0 +1,22 @@
+discard """
+  nimout: '''tenumfieldpragma.nim(20, 10) Warning: d is deprecated [Deprecated]
+tenumfieldpragma.nim(21, 10) Warning: e is deprecated [Deprecated]
+tenumfieldpragma.nim(22, 10) Warning: f is deprecated [Deprecated]
+'''
+"""
+
+type
+  A = enum
+    a
+    b = "abc"
+    c = (10, "def")
+    d {.deprecated.}
+    e {.deprecated.} = "ghi"
+    f {.deprecated.} = (20, "jkl")
+
+var v1 = a
+var v2 = b
+var v3 = c
+var v4 = d
+var v5 = e
+var v6 = f

tests/enum/tenumfieldpragmanoannot.nim

@@ -0,0 +1,10 @@
+discard """
+  errormsg: "annotation to deprecated not supported here"
+  line: 8
+"""
+
+type
+  A = enum
+    a {.deprecated: "njshd".}
+
+var v1 = a