[Support] Remove some #if __cplusplus > 201402L

llvm/include/llvm/ADT/Twine.h

@@ -15,9 +15,7 @@
 #include <cassert>
 #include <cstdint>
 #include <string>
-#if __cplusplus > 201402L
 #include <string_view>
-#endif
 
 namespace llvm {
 
@@ -287,7 +285,6 @@ namespace llvm {
       assert(isValid() && "Invalid twine!");
     }
 
-#if __cplusplus > 201402L
     /// Construct from an std::string_view by converting it to a pointer and
     /// length.  This handles string_views on a pure API basis, and avoids
     /// storing one (or a pointer to one) inside a Twine, which avoids problems
@@ -298,7 +295,6 @@ namespace llvm {
       LHS.ptrAndLength.length = Str.length();
       assert(isValid() && "Invalid twine!");
     }
-#endif
 
     /// Construct from a StringRef.
     /*implicit*/ Twine(const StringRef &Str) : LHSKind(PtrAndLengthKind) {

llvm/include/llvm/Support/raw_ostream.h

@@ -22,9 +22,7 @@
 #include <cstdint>
 #include <cstring>
 #include <string>
-#if __cplusplus > 201402L
 #include <string_view>
-#endif
 #include <system_error>
 #include <type_traits>
 
@@ -237,11 +235,9 @@ public:
     return write(Str.data(), Str.length());
   }
 
-#if __cplusplus > 201402L
   raw_ostream &operator<<(const std::string_view &Str) {
     return write(Str.data(), Str.length());
   }
-#endif
 
   raw_ostream &operator<<(const SmallVectorImpl<char> &Str) {
     return write(Str.data(), Str.size());

llvm/unittests/ADT/StringRefTest.cpp

@@ -59,16 +59,12 @@ TEST(StringRefTest, Construction) {
   EXPECT_EQ("hello", StringRef("hello"));
   EXPECT_EQ("hello", StringRef("hello world", 5));
   EXPECT_EQ("hello", StringRef(std::string("hello")));
-#if __cplusplus > 201402L
   EXPECT_EQ("hello", StringRef(std::string_view("hello")));
-#endif
 }
 
 TEST(StringRefTest, Conversion) {
   EXPECT_EQ("hello", std::string(StringRef("hello")));
-#if __cplusplus > 201402L
   EXPECT_EQ("hello", std::string_view(StringRef("hello")));
-#endif
 }
 
 TEST(StringRefTest, EmptyInitializerList) {

llvm/unittests/ADT/TwineTest.cpp

@@ -32,9 +32,7 @@ TEST(TwineTest, Construction) {
   EXPECT_EQ("hi", Twine(StringRef("hithere", 2)).str());
   EXPECT_EQ("hi", Twine(SmallString<4>("hi")).str());
   EXPECT_EQ("hi", Twine(formatv("{0}", "hi")).str());
-#if __cplusplus > 201402L
   EXPECT_EQ("hi", Twine(std::string_view("hi")).str());
-#endif
 }
 
 TEST(TwineTest, Numbers) {
@@ -76,10 +74,8 @@ TEST(TwineTest, Concat) {
             repr(Twine().concat(Twine(formatv("howdy")))));
   EXPECT_EQ("(Twine ptrAndLength:\"hey\" cstring:\"there\")",
             repr(Twine(SmallString<7>("hey")).concat(Twine("there"))));
-#if __cplusplus > 201402L
   EXPECT_EQ("(Twine ptrAndLength:\"hey\" cstring:\"there\")",
             repr(Twine(std::string_view("hey")).concat(Twine("there"))));
-#endif
 
   // Concatenation of unary ropes.
   EXPECT_EQ("(Twine cstring:\"a\" cstring:\"b\")",