Add run-translated-c test & fix one more edge case

Author: LemonBoy

src-self-hosted/translate_c.zig

@@ -1841,8 +1841,11 @@ fn transInitListExprRecord(
         //     .field_name = expr
         const period_tok = try appendToken(rp.c, .Period, ".");
 
-        const raw_name = try rp.c.str(ZigClangDecl_getName_bytes_begin(@ptrCast(*const ZigClangDecl, field_decl)));
-        if (raw_name.len < 1) continue;
+        var raw_name = try rp.c.str(ZigClangDecl_getName_bytes_begin(@ptrCast(*const ZigClangDecl, field_decl)));
+        if (ZigClangFieldDecl_isAnonymousStructOrUnion(field_decl)) {
+            const name = rp.c.decl_table.get(@ptrToInt(ZigClangFieldDecl_getCanonicalDecl(field_decl))).?;
+            raw_name = try mem.dupe(rp.c.a(), u8, name.value);
+        }
         const field_name_tok = try appendIdentifier(rp.c, raw_name);
 
         _ = try appendToken(rp.c, .Equal, "=");

test/run_translated_c.zig

@@ -39,4 +39,18 @@ pub fn addCases(cases: *tests.RunTranslatedCContext) void {
         \\    return 0;
         \\}
     , "");
+
+    cases.add("anonymous struct & unions",
+        \\#include <stdlib.h>
+        \\#include <stdint.h>
+        \\static struct { struct { uint16_t x, y; }; } x = { 1 };
+        \\static struct { union { uint32_t x; uint8_t y; }; } y = { 0x55AA55AA };
+        \\int main(int argc, char **argv) {
+        \\    if (x.x != 1) abort();
+        \\    if (x.y != 0) abort();
+        \\    if (y.x != 0x55AA55AA) abort();
+        \\    if (y.y != 0xAA) abort();
+        \\    return 0;
+        \\}
+    , "");
 }