Merge pull request #2767 from Geod24/revert-2692-std_optional

Revert "std::optional"
merged-on-behalf-of: David Nadlinger <code@klickverbot.at>

Author: dlang-bot

changelog/std_optional.dd

@@ -75,7 +75,6 @@ COPY=\
 	$(IMPDIR)\core\stdcpp\array.d \
 	$(IMPDIR)\core\stdcpp\exception.d \
 	$(IMPDIR)\core\stdcpp\new_.d \
-	$(IMPDIR)\core\stdcpp\optional.d \
 	$(IMPDIR)\core\stdcpp\string.d \
 	$(IMPDIR)\core\stdcpp\string_view.d \
 	$(IMPDIR)\core\stdcpp\typeinfo.d \

mak/COPY

@@ -47,7 +47,6 @@ DOCS=\
 	$(DOCDIR)\core_stdcpp_array.html \
 	$(DOCDIR)\core_stdcpp_exception.html \
 	$(DOCDIR)\core_stdcpp_new_.html \
-	$(DOCDIR)\core_stdcpp_optional.html \
 	$(DOCDIR)\core_stdcpp_string.html \
 	$(DOCDIR)\core_stdcpp_string_view.html \
 	$(DOCDIR)\core_stdcpp_typeinfo.html \

mak/DOCS

@@ -73,7 +73,6 @@ SRCS=\
 	src\core\stdcpp\array.d \
 	src\core\stdcpp\exception.d \
 	src\core\stdcpp\new_.d \
-	src\core\stdcpp\optional.d \
 	src\core\stdcpp\string.d \
 	src\core\stdcpp\string_view.d \
 	src\core\stdcpp\type_traits.d \

mak/SRCS

@@ -270,9 +270,6 @@ $(IMPDIR)\core\stdcpp\exception.d : src\core\stdcpp\exception.d
 $(IMPDIR)\core\stdcpp\new_.d : src\core\stdcpp\new_.d
 	copy $** $@
 
-$(IMPDIR)\core\stdcpp\optional.d : src\core\stdcpp\optional.d
-	copy $** $@
-
 $(IMPDIR)\core\stdcpp\string.d : src\core\stdcpp\string.d
 	copy $** $@
 

mak/WINDOWS

@@ -9,5 +9,5 @@ if exist dflags.txt del /q dflags.txt
 if exist add_tests.txt del /q add_tests.txt
 if %_MSC_VER% GTR 1900 echo /std:c++17 > cflags.txt
 if %_MSC_VER% GTR 1900 echo -extern-std=c++17 > dflags.txt
-if %_MSC_VER% GTR 1900 echo optional string_view > add_tests.txt
+if %_MSC_VER% GTR 1900 echo string_view > add_tests.txt
 del ver.c ver_raw.txt

setmscver.bat

@@ -4,7 +4,7 @@ HASCPP17:=`echo wow | $(CXX) -std=c++17 -E -xc++ - > /dev/null 2>&1 && echo yes`
 
 TESTS:=allocator new
 TESTS11:=array
-TESTS17:=optional string_view
+TESTS17:=string_view
 OLDABITESTS:=
 
 ifeq (osx,$(OS))