d: Merge upstream dmd 60bfa0ee7, druntime 94bd5bcb, phobos 3a1cd9a01.

D front-end changes:

    - Import dmd v2.100.0.
    - Add bit fields to D, enabled via the -fpreview=bitfields switch.
    - Removed the -ftransition=markdown and -frevert=markdown switches.
    - Added new trait `__traits(classInstanceAlignment)' to provide the
      required data alignment for classes.
    - The check for `pragma(crt_constructor)' and `pragma(crt_destructor)'
      linkage has been relaxed to allow all `void()' signatures.
    - ImportC parser now recognizes the `typeof(...)' operator.

D runtime changes:

    - Import druntime v2.100.0.

Phobos changes:

    - Import phobos v2.100.0.
    - To comply with dip1000, `std.socket.Socket` methods now accept only
      `scope' arrays.
    - The `fill', `alignSize', `align2', and `align4' methods of
      `std.outbuffer.OutBuffer' have been extended to allow specifying a custom
      value when pre-filling or padding the buffer.

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd 60bfa0ee7.
	* dmd/VERSION: Update version to v2.100.0.
	* d-builtins.cc (d_init_versions): Update for new front-end interface.
	* d-codegen.cc (d_decl_context): Use resolvedLinkage to get
	declaration linkage.
	(build_struct_literal): Track offset in bits.
	* d-gimplify.cc (d_gimplify_modify_expr): Check both operands for a
	bit-field reference.
	* d-lang.cc (d_handle_option): Handle -fpreview=bitfields, remove
	-frevert=markdown and -ftransition=vmarkdown.
	(d_post_options): Set flag_rtti and flag_exceptions if -fno-druntime
	was seen on command-line.
	(d_parse_file): Update for new front-end interface.
	(d_type_promotes_to): Use resolvedLinkage to get declaration linkage.
	* decl.cc (make_thunk): Likewise.
	* expr.cc (ExprVisitor::visit (CatAssignExp *)): Remove lowering for
	appending of an element or array to another array.
	* lang.opt (fpreview=bitfields): New option.
	(frevert=markdown): Remove.
	(ftransition=vmarkdown): Remove.
	* types.cc (layout_aggregate_members): Ignore anonymous fields in
	total count.

libphobos/ChangeLog:

	* libdruntime/MERGE: Merge upstream druntime 94bd5bcb.
	* libdruntime/Makefile.am (ALL_DRUNTIME_INSTALL_DSOURCES): Add
	$(DRUNTIME_DSOURCES_ELF).
	(ALL_DRUNTIME_SOURCES): Likewise.
	(DRUNTIME_DSOURCES_ELF): New variable.
	* libdruntime/Makefile.in: Regenerate.
	* src/MERGE: Merge upstream phobos 3a1cd9a01.
	* testsuite/libphobos.init_fini/custom_gc.d: Update test.

1 files changed, 61 insertions, 10 deletions

diff --git a/libphobos/src/std/outbuffer.d b/libphobos/src/std/outbuffer.d
index c434481..92af9a9 100644
--- a/libphobos/src/std/outbuffer.d
+++ b/libphobos/src/std/outbuffer.d
@@ -173,21 +173,40 @@ class OutBuffer
     }
 
     /****************************************
-     * Append nbytes of 0 to the internal buffer.
+     * Append nbytes of val to the internal buffer.
+     * Params:
+     *   nbytes = Number of bytes to fill.
+     *   val = Value to fill, defaults to 0.
      */
 
-    void fill0(size_t nbytes)
+    void fill(size_t nbytes, ubyte val = 0)
     {
         reserve(nbytes);
-        data[offset .. offset + nbytes] = 0;
+        data[offset .. offset + nbytes] = val;
         offset += nbytes;
     }
 
+    /****************************************
+     * Append nbytes of 0 to the internal buffer.
+     * Param:
+     *   nbytes - number of bytes to fill.
+     */
+    void fill0(size_t nbytes)
+    {
+        fill(nbytes);
+    }
+
     /**********************************
-     * 0-fill to align on power of 2 boundary.
+     * Append bytes until the buffer aligns on a power of 2 boundary.
+     *
+     * By default fills with 0 bytes.
+     *
+     * Params:
+     *   alignsize = Alignment value. Must be power of 2.
+     *   val = Value to fill, defaults to 0.
      */
 
-    void alignSize(size_t alignsize)
+    void alignSize(size_t alignsize, ubyte val = 0)
     in
     {
         assert(alignsize && (alignsize & (alignsize - 1)) == 0);
@@ -200,7 +219,35 @@ class OutBuffer
     {
         auto nbytes = offset & (alignsize - 1);
         if (nbytes)
-            fill0(alignsize - nbytes);
+            fill(alignsize - nbytes, val);
+    }
+    ///
+    @safe unittest
+    {
+        OutBuffer buf = new OutBuffer();
+        buf.write(cast(ubyte) 1);
+        buf.align2();
+        assert(buf.toBytes() == "\x01\x00");
+        buf.write(cast(ubyte) 2);
+        buf.align4();
+        assert(buf.toBytes() == "\x01\x00\x02\x00");
+        buf.write(cast(ubyte) 3);
+        buf.alignSize(8);
+        assert(buf.toBytes() == "\x01\x00\x02\x00\x03\x00\x00\x00");
+    }
+    /// ditto
+    @safe unittest
+    {
+        OutBuffer buf = new OutBuffer();
+        buf.write(cast(ubyte) 1);
+        buf.align2(0x55);
+        assert(buf.toBytes() == "\x01\x55");
+        buf.write(cast(ubyte) 2);
+        buf.align4(0x55);
+        assert(buf.toBytes() == "\x01\x55\x02\x55");
+        buf.write(cast(ubyte) 3);
+        buf.alignSize(8, 0x55);
+        assert(buf.toBytes() == "\x01\x55\x02\x55\x03\x55\x55\x55");
     }
 
     /// Clear the data in the buffer
@@ -211,23 +258,27 @@ class OutBuffer
 
     /****************************************
      * Optimize common special case alignSize(2)
+     * Params:
+     *   val = Value to fill, defaults to 0.
      */
 
-    void align2()
+    void align2(ubyte val = 0)
     {
         if (offset & 1)
-            write(cast(byte) 0);
+            write(cast(byte) val);
     }
 
     /****************************************
      * Optimize common special case alignSize(4)
+     * Params:
+     *   val = Value to fill, defaults to 0.
      */
 
-    void align4()
+    void align4(ubyte val = 0)
     {
         if (offset & 3)
         {   auto nbytes = (4 - offset) & 3;
-            fill0(nbytes);
+            fill(nbytes, val);
         }
     }