From 7769d141b243a025ca8f3896ec799d73c54b51de Mon Sep 17 00:00:00 2001
From: ringabout <43030857+ringabout@users.noreply.github.com>
Date: Mon, 13 Oct 2025 21:26:35 +0800
Subject: [PATCH] progress

---
 compiler/semstmts.nim |  2 +-
 compiler/semtypes.nim | 20 --------------------
 compiler/transf.nim   | 38 +-------------------------------------
 3 files changed, 2 insertions(+), 58 deletions(-)

diff --git a/compiler/semstmts.nim b/compiler/semstmts.nim
index af4384b998..ce8b59f9cd 100644
--- a/compiler/semstmts.nim
+++ b/compiler/semstmts.nim
@@ -1131,7 +1131,7 @@ proc semForVars(c: PContext, n: PNode; flags: TExprFlags): PNode =
         # BUGFIX: don't use `iter` here as that would strip away
         # the ``tyGenericInst``! See ``tests/compile/tgeneric.nim``
         # for an example:
-        v.typ = makeIterTupleType(c, iterBase)
+        v.typ = iterBase
         n[0] = newSymNode(v)
         if sfGenSym notin v.flags and not isDiscardUnderscore(v): addDecl(c, v)
         elif v.owner == nil: setOwner(v, getCurrOwner(c))
diff --git a/compiler/semtypes.nim b/compiler/semtypes.nim
index 77973521df..42efcd2399 100644
--- a/compiler/semtypes.nim
+++ b/compiler/semtypes.nim
@@ -1787,23 +1787,6 @@ proc maybeAliasType(c: PContext; typeExpr, prev: PType): PType =
   else:
     result = nil
 
-proc makeIterTupleType(c: PContext; typ: PType): PType =
-  if typ.kind == tyTuple:
-    var hasView = false
-    result = newTypeS(tyTuple, c)
-
-    for i in 0..<typ.len:
-      if typ[i].kind in {tyVar, tyLent}:
-        hasView = true
-      rawAddSon(result, typ[i].skipTypes({tyVar, tyLent}))
-
-    if hasView:
-      result.n = typ.n
-    else:
-      result = typ
-  else:
-    result = typ
-
 proc fixupTypeOf(c: PContext, prev: PType, typ: PType) =
   if prev != nil:
     let result = newTypeS(tyAlias, c)
@@ -2038,9 +2021,6 @@ proc semTypeOf2(c: PContext; n: PNode; prev: PType): PType =
       result = base
   fixupTypeOf(c, prev, result)
 
-  if result.kind == tyTuple:
-    result = makeIterTupleType(c, result)
-
 proc semTypeIdent(c: PContext, n: PNode): PSym =
   if n.kind == nkSym:
     result = getGenSym(c, n.sym)
diff --git a/compiler/transf.nim b/compiler/transf.nim
index 74139a0355..7f3ee8066b 100644
--- a/compiler/transf.nim
+++ b/compiler/transf.nim
@@ -385,39 +385,6 @@ template assignTupleUnpacking(c: PTransf, e: PNode) =
       let rhs = transform(c, newTupleAccess(c.graph, e, i))
       result.add(asgnTo(lhs, rhs))
 
-proc makeTupleUnpack(c: PTransf; lhs: PNode; rhs: PNode): PNode =
-  result = newNodeI(nkStmtList, lhs.info)
-
-  let temp = newSym(skTemp, getIdent(c.graph.cache, "tmpTupleAsgn"), c.idgen, getCurrOwner(c), rhs.info)
-  temp.typ = rhs.typ
-  temp.flags.incl(sfGenSym)
-  var v = newNodeI(nkLetSection, rhs.info)
-  let tempNode = newSymNode(temp) #newIdentNode(getIdent(genPrefix & $temp.id), value.info)
-  var vpart = newNodeI(nkIdentDefs, v.info, 3)
-  vpart[0] = tempNode
-  vpart[1] = c.graph.emptyNode
-  vpart[2] = rhs
-  v.add vpart
-  result.add(v)
-
-  var tupleConstr = newNodeIT(nkTupleConstr, lhs.info, lhs.typ)
-
-  for i in 0..<rhs.typ.len:
-    var field: PNode = nil
-    if rhs.typ[i].kind in {tyVar, tyLent}:
-      let tupleType = newTupleAccessRaw(tempNode, i)
-      tupleType.typ() = rhs.typ[i]
-      field = newDeref(tupleType)
-    else:
-      field = newTupleAccessRaw(tempNode, i)
-
-    field.typ() = rhs.typ[i].skipTypes({tyVar, tyLent})
-
-    tupleConstr.add field
-
-  result.add newAsgnStmt(c, nkFastAsgn, lhs, tupleConstr, false)
-  result = transform(c, result)
-
 proc hasViewTypes(typ: PType): bool =
   if typ.kind == tyTuple:
     result = false
@@ -435,10 +402,7 @@ proc transformYield(c: PTransf, n: PNode): PNode =
     case lhs.kind
     of nkSym:
       internalAssert c.graph.config, lhs.sym.kind == skForVar
-      if rhs.typ.kind == tyTuple and hasViewTypes(rhs.typ):
-        result = makeTupleUnpack(c, lhs, rhs)
-      else:
-        result = newAsgnStmt(c, nkFastAsgn, lhs, rhs, false)
+      result = newAsgnStmt(c, nkFastAsgn, lhs, rhs, false)
     of nkDotExpr:
       result = newAsgnStmt(c, nkAsgn, lhs, rhs, false)
     else: