Now that C++17 is official (https://www.iso.org/standard/68564.html), start changing the C++1z terminology over to C++17. NFC intended, these are all mechanical changes.

llvm-svn: 319688
diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index cc032c8..949b948 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -3228,7 +3228,7 @@
 
       // Likewise, if this is a context where the identifier could be a template
       // name, check whether this is a deduction guide declaration.
-      if (getLangOpts().CPlusPlus1z &&
+      if (getLangOpts().CPlusPlus17 &&
           (DSContext == DSC_class || DSContext == DSC_top_level) &&
           Actions.isDeductionGuideName(getCurScope(), *Tok.getIdentifierInfo(),
                                        Tok.getLocation()) &&
@@ -4420,7 +4420,7 @@
     ProhibitAttributes(attrs); // GNU-style attributes are prohibited.
     if (standardAttributesAllowed() && isCXX11AttributeSpecifier()) {
       if (getLangOpts().CPlusPlus)
-        Diag(Tok.getLocation(), getLangOpts().CPlusPlus1z
+        Diag(Tok.getLocation(), getLangOpts().CPlusPlus17
                                     ? diag::warn_cxx14_compat_ns_enum_attribute
                                     : diag::ext_ns_enum_attribute)
             << 1 /*enumerator*/;
diff --git a/clang/lib/Parse/ParseDeclCXX.cpp b/clang/lib/Parse/ParseDeclCXX.cpp
index ca195901..44e7a35 100644
--- a/clang/lib/Parse/ParseDeclCXX.cpp
+++ b/clang/lib/Parse/ParseDeclCXX.cpp
@@ -77,7 +77,7 @@
   ParsedAttributesWithRange attrs(AttrFactory);
   SourceLocation attrLoc;
   if (getLangOpts().CPlusPlus11 && isCXX11AttributeSpecifier()) {
-    Diag(Tok.getLocation(), getLangOpts().CPlusPlus1z
+    Diag(Tok.getLocation(), getLangOpts().CPlusPlus17
                                 ? diag::warn_cxx14_compat_ns_enum_attribute
                                 : diag::ext_ns_enum_attribute)
       << 0 /*namespace*/;
@@ -142,7 +142,7 @@
     // Normal namespace definition, not a nested-namespace-definition.
   } else if (InlineLoc.isValid()) {
     Diag(InlineLoc, diag::err_inline_nested_namespace_definition);
-  } else if (getLangOpts().CPlusPlus1z) {
+  } else if (getLangOpts().CPlusPlus17) {
     Diag(ExtraNamespaceLoc[0],
          diag::warn_cxx14_compat_nested_namespace_definition);
   } else {
@@ -605,7 +605,7 @@
   }
 
   if (TryConsumeToken(tok::ellipsis, D.EllipsisLoc))
-    Diag(Tok.getLocation(), getLangOpts().CPlusPlus1z ?
+    Diag(Tok.getLocation(), getLangOpts().CPlusPlus17 ?
          diag::warn_cxx17_compat_using_declaration_pack :
          diag::ext_using_declaration_pack);
 
@@ -723,7 +723,7 @@
   }
 
   if (DeclsInGroup.size() > 1)
-    Diag(Tok.getLocation(), getLangOpts().CPlusPlus1z ?
+    Diag(Tok.getLocation(), getLangOpts().CPlusPlus17 ?
          diag::warn_cxx17_compat_multi_using_declaration :
          diag::ext_multi_using_declaration);
 
@@ -851,10 +851,10 @@
 
   ExprResult AssertMessage;
   if (Tok.is(tok::r_paren)) {
-    Diag(Tok, getLangOpts().CPlusPlus1z
+    Diag(Tok, getLangOpts().CPlusPlus17
                   ? diag::warn_cxx14_compat_static_assert_no_message
                   : diag::ext_static_assert_no_message)
-      << (getLangOpts().CPlusPlus1z
+      << (getLangOpts().CPlusPlus17
               ? FixItHint()
               : FixItHint::CreateInsertion(Tok.getLocation(), ", \"\""));
   } else {
@@ -3625,7 +3625,7 @@
   if (P.getLangOpts().CPlusPlus11) {
     const char *Replacement = IsNoexcept ? "noexcept" : "noexcept(false)";
     P.Diag(Range.getBegin(),
-           P.getLangOpts().CPlusPlus1z && !IsNoexcept
+           P.getLangOpts().CPlusPlus17 && !IsNoexcept
                ? diag::ext_dynamic_exception_spec
                : diag::warn_exception_spec_deprecated)
         << Range;
@@ -3956,7 +3956,7 @@
   SourceLocation CommonScopeLoc;
   IdentifierInfo *CommonScopeName = nullptr;
   if (Tok.is(tok::kw_using)) {
-    Diag(Tok.getLocation(), getLangOpts().CPlusPlus1z
+    Diag(Tok.getLocation(), getLangOpts().CPlusPlus17
                                 ? diag::warn_cxx14_compat_using_attribute_ns
                                 : diag::ext_using_attribute_ns);
     ConsumeToken();
diff --git a/clang/lib/Parse/ParseExpr.cpp b/clang/lib/Parse/ParseExpr.cpp
index 0f2ec6b..233e0ac 100644
--- a/clang/lib/Parse/ParseExpr.cpp
+++ b/clang/lib/Parse/ParseExpr.cpp
@@ -2733,7 +2733,7 @@
     }
   }
 
-  Diag(EllipsisLoc, getLangOpts().CPlusPlus1z
+  Diag(EllipsisLoc, getLangOpts().CPlusPlus17
                         ? diag::warn_cxx14_compat_fold_expression
                         : diag::ext_fold_expression);
 
diff --git a/clang/lib/Parse/ParseExprCXX.cpp b/clang/lib/Parse/ParseExprCXX.cpp
index c3199f2..ade0655 100644
--- a/clang/lib/Parse/ParseExprCXX.cpp
+++ b/clang/lib/Parse/ParseExprCXX.cpp
@@ -1062,7 +1062,7 @@
 addConstexprToLambdaDeclSpecifier(Parser &P, SourceLocation ConstexprLoc,
                                   DeclSpec &DS) {
   if (ConstexprLoc.isValid()) {
-    P.Diag(ConstexprLoc, !P.getLangOpts().CPlusPlus1z
+    P.Diag(ConstexprLoc, !P.getLangOpts().CPlusPlus17
                              ? diag::ext_constexpr_on_lambda_cxx17
                              : diag::warn_cxx14_compat_constexpr_on_lambda);
     const char *PrevSpec = nullptr;
@@ -1760,7 +1760,7 @@
   }
 
   case ConditionOrInitStatement::InitStmtDecl: {
-    Diag(Tok.getLocation(), getLangOpts().CPlusPlus1z
+    Diag(Tok.getLocation(), getLangOpts().CPlusPlus17
                                 ? diag::warn_cxx14_compat_init_statement
                                 : diag::ext_init_statement)
         << (CK == Sema::ConditionKind::Switch);
@@ -2480,7 +2480,7 @@
                                           /*IsCtorOrDtorName=*/true,
                                           /*NonTrivialTypeSourceInfo=*/true);
       Result.setConstructorName(Ty, IdLoc, IdLoc);
-    } else if (getLangOpts().CPlusPlus1z &&
+    } else if (getLangOpts().CPlusPlus17 &&
                AllowDeductionGuide && SS.isEmpty() &&
                Actions.isDeductionGuideName(getCurScope(), *Id, IdLoc,
                                             &TemplateName)) {
diff --git a/clang/lib/Parse/ParseStmt.cpp b/clang/lib/Parse/ParseStmt.cpp
index e8cf7d5..3f25610 100644
--- a/clang/lib/Parse/ParseStmt.cpp
+++ b/clang/lib/Parse/ParseStmt.cpp
@@ -1128,7 +1128,7 @@
 
   bool IsConstexpr = false;
   if (Tok.is(tok::kw_constexpr)) {
-    Diag(Tok, getLangOpts().CPlusPlus1z ? diag::warn_cxx14_compat_constexpr_if
+    Diag(Tok, getLangOpts().CPlusPlus17 ? diag::warn_cxx14_compat_constexpr_if
                                         : diag::ext_constexpr_if);
     IsConstexpr = true;
     ConsumeToken();
@@ -1613,7 +1613,7 @@
       ForRangeInit.RangeExpr = ParseExpression();
 
     Diag(Loc, diag::err_for_range_identifier)
-      << ((getLangOpts().CPlusPlus11 && !getLangOpts().CPlusPlus1z)
+      << ((getLangOpts().CPlusPlus11 && !getLangOpts().CPlusPlus17)
               ? FixItHint::CreateInsertion(Loc, "auto &&")
               : FixItHint());
 
diff --git a/clang/lib/Parse/ParseTemplate.cpp b/clang/lib/Parse/ParseTemplate.cpp
index fcb1142..fe17d65 100644
--- a/clang/lib/Parse/ParseTemplate.cpp
+++ b/clang/lib/Parse/ParseTemplate.cpp
@@ -590,10 +590,10 @@
     const Token &Next = Tok.is(tok::kw_struct) ? NextToken() : Tok;
     if (Tok.is(tok::kw_typename)) {
       Diag(Tok.getLocation(),
-           getLangOpts().CPlusPlus1z
+           getLangOpts().CPlusPlus17
                ? diag::warn_cxx14_compat_template_template_param_typename
                : diag::ext_template_template_param_typename)
-        << (!getLangOpts().CPlusPlus1z
+        << (!getLangOpts().CPlusPlus17
                 ? FixItHint::CreateReplacement(Tok.getLocation(), "class")
                 : FixItHint());
     } else if (Next.isOneOf(tok::identifier, tok::comma, tok::greater,