dlang · WalterBright · Jan 23, 2024
diff --git a/compiler/src/dmd/dsymbolsem.d b/compiler/src/dmd/dsymbolsem.d
@@ -1494,14 +1494,6 @@ private extern(C++) final class DsymbolSemanticVisitor : Visitor
         if (dsym.errors)
             return;
 
-        if (!(global.params.bitfields || sc.flags & SCOPE.Cfile))
-        {
-            version (IN_GCC)
-                .error(dsym.loc, "%s `%s` use `-fpreview=bitfields` for bitfield support", dsym.kind, dsym.toPrettyChars);
-            else
-                .error(dsym.loc, "%s `%s` use -preview=bitfields for bitfield support", dsym.kind, dsym.toPrettyChars);
-        }
-
         if (!dsym.parent.isStructDeclaration() && !dsym.parent.isClassDeclaration())
         {
             .error(dsym.loc, "%s `%s` - bit-field must be member of struct, union, or class", dsym.kind, dsym.toPrettyChars);

diff --git a/compiler/test/compilable/dbitfield.d b/compiler/test/compilable/dbitfield.d
@@ -1,4 +1,4 @@
-/* REQUIRED_ARGS: -preview=bitfields
+/*
  */
 
 /***************************************************/

diff --git a/compiler/test/fail_compilation/biterrors.d b/compiler/test/fail_compilation/biterrors.d
@@ -1,4 +1,4 @@
-/* REQUIRED_ARGS: -preview=bitfields
+/*
  * TEST_OUTPUT:
 ---
 fail_compilation/biterrors.d(103): Error: initializer not allowed for bit-field declaration

diff --git a/compiler/test/fail_compilation/biterrors2.d b/compiler/test/fail_compilation/biterrors2.d
@@ -1,4 +1,4 @@
-/* REQUIRED_ARGS: -preview=bitfields
+/*
  * TEST_OUTPUT:
 ---
 fail_compilation/biterrors2.d(100): Error: variable `biterrors2.a` - bit-field must be member of struct, union, or class

diff --git a/compiler/test/fail_compilation/biterrors3.d b/compiler/test/fail_compilation/biterrors3.d
@@ -1,4 +1,4 @@
-/* REQUIRED_ARGS: -preview=bitfields
+/*
  * TEST_OUTPUT:
 ---
 fail_compilation/biterrors3.d(103): Error: storage class not allowed for bit-field declaration

diff --git a/compiler/test/fail_compilation/biterrors4.d b/compiler/test/fail_compilation/biterrors4.d
@@ -1,4 +1,4 @@
-/* REQUIRED_ARGS: -preview=bitfields
+/*
  * TEST_OUTPUT:
 ---
 fail_compilation/biterrors4.d(109): Error: cannot take address of bit-field `a`

diff --git a/compiler/test/fail_compilation/dbitfields.d b/compiler/test/fail_compilation/dbitfields.d
@@ -1,4 +1,4 @@
-/* REQUIRED_ARGS: -preview=bitfields
+/*
  * TEST_OUTPUT:
 ---
 fail_compilation/dbitfields.d(118): Error: reinterpretation through overlapped field `e` is not allowed in CTFE

diff --git a/compiler/test/fail_compilation/test16188.d b/compiler/test/fail_compilation/test16188.d
@@ -1,4 +1,4 @@
-/* REQUIRED_ARGS: -preview=bitfields
+/*
  * TEST_OUTPUT:
 ---
 fail_compilation/test16188.d(101): Error: no property `name` for `Where()` of type `test16188.Where`

diff --git a/compiler/test/fail_compilation/test17284.d b/compiler/test/fail_compilation/test17284.d
@@ -4,7 +4,7 @@ TEST_OUTPUT:
 fail_compilation/test17284.d(17): Error: field `U.c` cannot access pointers in `@safe` code that overlap other fields
 pure nothrow @safe void(U t)
 ---
-REQUIRED_ARGS: -preview=bitfields
+
 */
 
 // https://issues.dlang.org/show_bug.cgi?id=17284

diff --git a/compiler/test/runnable/bit.d b/compiler/test/runnable/bit.d
@@ -1,4 +1,4 @@
-/* REQUIRED_ARGS: -preview=bitfields
+/*
  */
 
 struct T

diff --git a/compiler/test/runnable/dbitfields.d b/compiler/test/runnable/dbitfields.d
@@ -1,4 +1,4 @@
-/* REQUIRED_ARGS: -preview=bitfields
+/*
  */
 
 struct S

diff --git a/compiler/test/runnable/dbitfieldsdm.d b/compiler/test/runnable/dbitfieldsdm.d
@@ -1,7 +1,7 @@
 /* test bitfields for Digital Mars
  * Note that this test is for win32 only
  *
- * REQUIRED_ARGS: -preview=bitfields
+ *
  * DISABLED: win32mscoff win64 linux freebsd osx
  * RUN_OUTPUT:
 ---

diff --git a/compiler/test/runnable/dbitfieldsms.d b/compiler/test/runnable/dbitfieldsms.d
@@ -1,5 +1,5 @@
 /* test bitfields for Microsoft C
- * REQUIRED_ARGS: -preview=bitfields
+ *
  * DISABLED: win32 linux32 freebsd32 osx32 linux64 freebsd64 osx64
  * RUN_OUTPUT:
 ---

diff --git a/compiler/test/runnable/dbitfieldsposix32.d b/compiler/test/runnable/dbitfieldsposix32.d
@@ -1,5 +1,5 @@
 /* test bitfields
- * REQUIRED_ARGS: -preview=bitfields
+ *
  * DISABLED: win32 win64 linux64 freebsd64 osx64
  * RUN_OUTPUT:
 ---

diff --git a/compiler/test/runnable/dbitfieldsposix64.d b/compiler/test/runnable/dbitfieldsposix64.d
@@ -1,5 +1,5 @@
 /* test bitfields
- * REQUIRED_ARGS: -preview=bitfields
+ *
  * DISABLED: win32 win64 linux32 freebsd32 osx32
  * RUN_OUTPUT:
 ---