Removed the non-existing-in-C "struct/union scope" for structs/unions.

Fixed handling of struct/union field declarations without identifiers, which do nothing.

src/cc65/declare.c

@@ -965,7 +965,7 @@ static SymEntry* ParseUnionDecl (const char* Name, unsigned* DSFlags)
                 */
                 AddBitField (Decl.Ident, Decl.Type, 0, 0, FieldWidth,
                              SignednessSpecified);
-            } else {
+            } else if (Decl.Ident[0] != '\0') {
                 Entry = AddLocalSym (Decl.Ident, Decl.Type, SC_STRUCTFIELD, 0);
                 if (IsAnonName (Decl.Ident)) {
                     Entry->V.A.ANumber = UnionTagEntry->V.S.ACount++;
@@ -994,7 +994,7 @@ NextMember: if (CurTok.Tok != TOK_COMMA) {
     NextToken ();
 
     /* Remember the symbol table and leave the struct level */
-    FieldTab = GetSymTab ();
+    FieldTab = GetFieldSymTab ();
     LeaveStructLevel ();
 
     /* Return a fictitious symbol if errors occurred during parsing */
@@ -1167,7 +1167,7 @@ static SymEntry* ParseStructDecl (const char* Name, unsigned* DSFlags)
                 /* Add any full bytes to the struct size. */
                 StructSize += BitOffs / CHAR_BITS;
                 BitOffs %= CHAR_BITS;
-            } else {
+            } else if (Decl.Ident[0] != '\0') {
                 Entry = AddLocalSym (Decl.Ident, Decl.Type, SC_STRUCTFIELD, StructSize);
                 if (IsAnonName (Decl.Ident)) {
                     Entry->V.A.ANumber = StructTagEntry->V.S.ACount++;
@@ -1208,7 +1208,7 @@ NextMember: if (CurTok.Tok != TOK_COMMA) {
     NextToken ();
 
     /* Remember the symbol table and leave the struct level */
-    FieldTab = GetSymTab ();
+    FieldTab = GetFieldSymTab ();
     LeaveStructLevel ();
 
     /* Return a fictitious symbol if errors occurred during parsing */

src/cc65/symtab.c

@@ -92,6 +92,7 @@ static SymTable*        SymTab0         = 0;
 static SymTable*        SymTab          = 0;
 static SymTable*        TagTab0         = 0;
 static SymTable*        TagTab          = 0;
+static SymTable*        FieldTab        = 0;
 static SymTable*        LabelTab        = 0;
 static SymTable*        SPAdjustTab     = 0;
 static SymTable*        FailSafeTab     = 0;    /* For errors */
@@ -390,9 +391,9 @@ void EnterStructLevel (void)
     ** nested in struct scope are NOT local to the struct but visible in the
     ** outside scope. So we will NOT create a new struct or enum table.
     */
-    S = NewSymTable (SYMTAB_SIZE_BLOCK);
-    S->PrevTab  = SymTab;
-    SymTab      = S;
+    S = NewSymTable (SYMTAB_SIZE_STRUCT);
+    S->PrevTab  = FieldTab;
+    FieldTab    = S;
 }
 
 
@@ -401,7 +402,7 @@ void LeaveStructLevel (void)
 /* Leave a nested block for a struct definition */
 {
     /* Don't delete the table */
-    SymTab = SymTab->PrevTab;
+    FieldTab = FieldTab->PrevTab;
 }
 
 
@@ -850,7 +851,7 @@ SymEntry* AddBitField (const char* Name, const Type* T, unsigned Offs,
 /* Add a bit field to the local symbol table and return the symbol entry */
 {
     /* Do we have an entry with this name already? */
-    SymEntry* Entry = FindSymInTable (SymTab, Name, HashStr (Name));
+    SymEntry* Entry = FindSymInTable (FieldTab, Name, HashStr (Name));
     if (Entry) {
 
         /* We have a symbol with this name already */
@@ -882,7 +883,7 @@ SymEntry* AddBitField (const char* Name, const Type* T, unsigned Offs,
         }
 
         /* Add the entry to the symbol table */
-        AddSymEntry (SymTab, Entry);
+        AddSymEntry (FieldTab, Entry);
 
     }
 
@@ -1070,9 +1071,9 @@ SymEntry* AddLabelSym (const char* Name, unsigned Flags)
 
 
 SymEntry* AddLocalSym (const char* Name, const Type* T, unsigned Flags, int Offs)
-/* Add a local symbol and return the symbol entry */
+/* Add a local or struct/union field symbol and return the symbol entry */
 {
-    SymTable* Tab = SymTab;
+    SymTable* Tab = (Flags & SC_STRUCTFIELD) == 0 ? SymTab : FieldTab;
     ident Ident;
 
     /* Do we have an entry with this name already? */
@@ -1267,6 +1268,16 @@ SymTable* GetGlobalSymTab (void)
     return SymTab0;
 }
 
+
+
+SymTable* GetFieldSymTab (void)
+/* Return the current field symbol table */
+{
+    return FieldTab;
+}
+
+
+
 SymTable* GetLabelSymTab (void)
 /* Return the global symbol table */
 {

src/cc65/symtab.h

@@ -166,7 +166,7 @@ SymEntry* AddLabelSym (const char* Name, unsigned Flags);
 /* Add a goto label to the symbol table */
 
 SymEntry* AddLocalSym (const char* Name, const Type* T, unsigned Flags, int Offs);
-/* Add a local symbol and return the symbol entry */
+/* Add a local or struct/union field symbol and return the symbol entry */
 
 SymEntry* AddGlobalSym (const char* Name, const Type* T, unsigned Flags);
 /* Add an external or global symbol to the symbol table and return the entry */
@@ -185,6 +185,9 @@ SymTable* GetSymTab (void);
 SymTable* GetGlobalSymTab (void);
 /* Return the global symbol table */
 
+SymTable* GetFieldSymTab (void);
+/* Return the current field symbol table */
+
 SymTable* GetLabelSymTab (void);
 /* Return the label symbol table */
 

test/misc/bug1437.c

@@ -1,23 +0,0 @@
-
-/* bug #1437 enum declaration in struct does not compile */
-
-struct nodelist1 {
-    enum { DEAD1, LIVE1, ONCE1, TWICE1 } live1;
-} firstnode1 = {ONCE1};
-
-enum nodestate2 { DEAD2, LIVE2, ONCE2, TWICE2 } live2;
-
-struct nodelist2 {
-    enum nodestate2 live2;
-} firstnode2 = {TWICE2};
-
-int main (void)
-{
-    if (firstnode1.live1 != ONCE1) {
-        return 1;
-    }
-    if (firstnode2.live2 != TWICE2) {
-        return 1;
-    }
-    return 0;
-}

test/val/bug1437.c

@@ -0,0 +1,35 @@
+
+/* bug #1437 enum declaration in a struct/union is invisible in the scope where the struct/union is declared */
+
+struct nodelist1 {
+    struct {
+        enum { DEAD1, LIVE1, ONCE1, TWICE1 } live1;
+    } s;
+} firstnode1 = {ONCE1};
+
+enum nodestate2 { DEAD2, LIVE2, ONCE2, TWICE2 } live2;
+
+union nodelist2 {
+    enum nodestate2 live2;
+} firstnode2 = { {TWICE2} };
+
+struct T {
+    int I;
+    int;
+    enum E {
+        I
+    };
+};
+
+int failures = 0;
+
+int main (void)
+{
+    if (firstnode1.s.live1 != ONCE1) {
+        ++failures;
+    }
+    if (firstnode2.live2 != TWICE2) {
+        ++failures;
+    }
+    return failures;
+}