Add @betterC to druntime

.circleci/config.yml

@@ -22,3 +22,6 @@ jobs:
       - run:
           command: ./.circleci/run.sh codecov
           name: Upload coverage files to CodeCov
+      - run:
+          command: ./.circleci/run.sh betterc
+          name: Run @betterC tests

.circleci/run.sh

@@ -103,6 +103,12 @@ coverage() {
     TEST_COVERAGE="1" make -j$N -C . -f posix.mak MODEL=$MODEL unittest-debug
 }
 
+betterc()
+{
+    clone https://github.com/dlang/tools.git ../tools master --depth 1
+    make -f posix.mak betterc -j$N DUB="$HOME/dlang/dmd-${HOST_DMD_VER}/linux/bin64/dub"
+}
+
 codecov()
 {
     # CodeCov gets confused by lst files which it can't matched
@@ -115,6 +121,7 @@ case $1 in
     install-deps) install_deps ;;
     setup-repos) setup_repos ;;
     style) style ;;
+    betterc) betterc ;;
     coverage) coverage ;;
     codecov) codecov ;;
 esac

mak/COPY

@@ -23,6 +23,7 @@ COPY=\
 	\
 	$(IMPDIR)\core\internal\abort.d \
 	$(IMPDIR)\core\internal\arrayop.d \
+	$(IMPDIR)\core\internal\attributes.d \
 	$(IMPDIR)\core\internal\convert.d \
 	$(IMPDIR)\core\internal\dassert.d \
 	$(IMPDIR)\core\internal\hash.d \

mak/WINDOWS

@@ -123,6 +123,9 @@ $(IMPDIR)\core\internal\abort.d : src\core\internal\abort.d
 $(IMPDIR)\core\internal\arrayop.d : src\core\internal\arrayop.d
 	copy $** $@
 
+$(IMPDIR)\core\internal\attributes.d : src\core\internal\attributes.d
+	copy $** $@
+
 $(IMPDIR)\core\internal\convert.d : src\core\internal\convert.d
 	copy $** $@
 

posix.mak

@@ -6,6 +6,8 @@
 QUIET:=
 
 DMD_DIR=../dmd
+DUB=dub
+TOOLS_DIR=../tools
 
 include $(DMD_DIR)/src/osmodel.mak
 
@@ -315,6 +317,9 @@ $(ROOT)/unittest/test_runner: $(UT_DRUNTIME) src/test_runner.d $(DMD)
 
 endif
 
+TESTS_EXTRACTOR=$(ROOT)/tests_extractor
+BETTERCTESTS_DIR=$(ROOT)/betterctests
+
 # macro that returns the module name given the src path
 moduleName=$(subst rt.invariant,invariant,$(subst object_,object,$(subst /,.,$(1))))
 
@@ -385,6 +390,42 @@ clean: $(addsuffix /.clean,$(ADDITIONAL_TESTS))
 test/%/.clean: test/%/Makefile
 	$(MAKE) -C test/$* clean
 
+%/.directory :
+	mkdir -p $* || exists $*
+	touch $@
+
+################################################################################
+# Build the test extractor.
+# - extracts and runs public unittest examples to checks for missing imports
+# - extracts and runs @betterC unittests
+################################################################################
+
+$(TESTS_EXTRACTOR): $(TOOLS_DIR)/tests_extractor.d | $(LIB)
+	$(DUB) build --force --single $<
+	mv $(TOOLS_DIR)/tests_extractor $@
+
+test_extractor: $(TESTS_EXTRACTOR)
+
+################################################################################
+# Check and run @betterC tests
+# ----------------------------
+#
+# Extract @betterC tests of a module and run them in -betterC
+#
+#   make -f betterc -j20                       # all tests
+#   make -f posix.mak src/core/memory.betterc  # individual module
+################################################################################
+
+betterc: | $(TESTS_EXTRACTOR) $(BETTERCTESTS_DIR)/.directory
+	$(MAKE) -f posix.mak $$(find src -type f -name '*.d' | sed 's/[.]d/.betterc/')
+
+%.betterc: %.d | $(TESTS_EXTRACTOR) $(BETTERCTESTS_DIR)/.directory
+	@$(TESTS_EXTRACTOR) --betterC --attributes betterC \
+		--inputdir  $< --outputdir $(BETTERCTESTS_DIR)
+	@$(DMD) $(NODEFAULTLIB) -betterC $(UDFLAGS) $(UTFLAGS) -od$(BETTERCTESTS_DIR) -run $(BETTERCTESTS_DIR)/$(subst /,_,$<)
+
+################################################################################
+
 # Submission to Druntime are required to conform to the DStyle
 # The tests below automate some, but not all parts of the DStyle guidelines.
 # See: http://dlang.org/dstyle.html

src/core/atomic.d

@@ -10,6 +10,8 @@
 
 module core.atomic;
 
+import core.internal.attributes : betterC;
+
 version (D_InlineAsm_X86)
 {
     version = AsmX86;
@@ -1471,7 +1473,7 @@ version (unittest)
         testLoadStore!(MemoryOrder.raw, T)( val );
     }
 
-    @safe pure nothrow unittest
+    @betterC @safe pure nothrow unittest
     {
         testType!(bool)();
 
@@ -1483,6 +1485,10 @@ version (unittest)
 
         testType!(int)();
         testType!(uint)();
+    }
+
+    @safe pure nothrow unittest
+    {
 
         testType!(shared int*)();
 
@@ -1518,7 +1524,7 @@ version (unittest)
         }
     }
 
-    pure nothrow unittest
+    @betterC pure nothrow unittest
     {
         static if (has128BitCAS)
         {
@@ -1558,7 +1564,7 @@ version (unittest)
         }
     }
 
-    pure nothrow unittest
+    @betterC pure nothrow unittest
     {
         static struct S { int val; }
         auto s = shared(S)(1);
@@ -1621,7 +1627,7 @@ version (unittest)
     }
 
     // === atomicFetchAdd and atomicFetchSub operations ====
-    pure nothrow @nogc @safe unittest
+    @betterC pure nothrow @nogc @safe unittest
     {
         shared ubyte u8 = 1;
         shared ushort u16 = 2;
@@ -1645,7 +1651,7 @@ version (unittest)
         }
     }
 
-    pure nothrow @nogc @safe unittest
+    @betterC pure nothrow @nogc @safe unittest
     {
         shared ubyte u8 = 1;
         shared ushort u16 = 2;
@@ -1669,7 +1675,7 @@ version (unittest)
         }
     }
 
-    pure nothrow @nogc @safe unittest // issue 16651
+    @betterC pure nothrow @nogc @safe unittest // issue 16651
     {
         shared ulong a = 2;
         uint b = 1;

src/core/internal/attributes.d

@@ -0,0 +1,11 @@
+module core.internal.attributes;
+
+/**
+Used to annotate `unittest`s which need to be tested in a `-betterC` environment.
+
+Such `unittest`s will be compiled and executed without linking druntime in, with
+a `__traits(getUnitTests, mixin(__MODULE__))` style test runner.
+Note that just like any other `unittest` in druntime, they will also be compiled
+and executed without `-betterC`.
+*/
+package(core) enum betterC = 1;