ImportC add simple array initialization

Author: WalterBright

src/dmd/initsem.d

@@ -559,11 +559,46 @@ extern(C++) Initializer initializerSemantic(Initializer init, Scope* sc, ref Typ
         return i;
     }
 
-    Initializer visitC(CInitializer i)
+    Initializer visitC(CInitializer ci)
     {
         //printf("CInitializer::semantic()\n");
-        error(i.loc, "C initializers not supported yet");
-        return err();
+        t = t.toBasetype();
+        auto tsa = t.isTypeSArray();
+        if (!tsa)
+        {
+            error(ci.loc, "C non-static-array initializers not supported yet");
+            return err();
+        }
+
+        const uint amax = 0x8000_0000;
+        bool errors;
+        auto tn = tsa.nextOf();
+        auto dil = ci.initializerList[];
+        foreach (di; dil)
+        {
+            if (di.designatorList)
+            {
+                error(ci.loc, "C designator-list not supported yet");
+                return err();
+            }
+            di.initializer = di.initializer.initializerSemantic(sc, tn, needInterpret);
+            if (di.initializer.isErrorInitializer())
+                errors = true;
+        }
+
+        if (errors)
+            return err();
+
+        const sz = tn.size();
+        bool overflow;
+        const max = mulu(dil.length, sz, overflow);
+        if (overflow || max >= amax)
+        {
+            error(ci.loc, "array dimension %llu exceeds max of %llu", ulong(dil.length), ulong(amax / sz));
+            return err();
+        }
+
+        return ci;
     }
 
     final switch (init.kind)

src/dmd/todt.d

@@ -79,6 +79,9 @@ extern (C++) void Initializer_toDt(Initializer init, ref DtBuilder dtb)
 
     void visitStruct(StructInitializer si)
     {
+        /* The StructInitializer was converted to a StructLiteralExp,
+         * which is converted to dtb by membersToDt()
+         */
         //printf("StructInitializer.toDt('%s')\n", si.toChars());
         assert(0);
     }
@@ -197,14 +200,25 @@ extern (C++) void Initializer_toDt(Initializer init, ref DtBuilder dtb)
         Expression_toDt(ei.exp, dtb);
     }
 
+    void visitC(CInitializer ci)
+    {
+        //printf("CInitializer::semantic()\n");
+        auto dil = ci.initializerList[];
+        foreach (di; dil)
+        {
+            assert(!di.designatorList);
+            Initializer_toDt(di.initializer, dtb);
+        }
+    }
+
     final switch (init.kind)
     {
         case InitKind.void_:   return visitVoid  (cast(  VoidInitializer)init);
         case InitKind.error:   return visitError (cast( ErrorInitializer)init);
         case InitKind.struct_: return visitStruct(cast(StructInitializer)init);
         case InitKind.array:   return visitArray (cast( ArrayInitializer)init);
         case InitKind.exp:     return visitExp   (cast(   ExpInitializer)init);
-        case InitKind.C_:      assert(0);
+        case InitKind.C_:      return visitC     (cast(     CInitializer)init);
     }
 }
 

test/runnable/cstuff2.c

@@ -0,0 +1,22 @@
+
+int printf(const char *, ...);
+void exit(int);
+
+void test1()
+{
+    static int a[3] = {1, 2, 3};
+    if (a[0] != 1 ||
+        a[1] != 2 ||
+        a[2] != 3)
+    {
+        printf("error 1\n");
+        exit(1);
+    }
+}
+
+int main()
+{
+    test1();
+    return 0;
+}
+