From 8aebcb739a4aff5ccf007fd740aa9105071feff4 Mon Sep 17 00:00:00 2001
From: Nate Begeman <natebegeman@mac.com>
Date: Thu, 15 Nov 2007 07:30:50 +0000
Subject: [PATCH] Break out bool/true/false support into a LangOption

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@44164 91177308-0d34-0410-b5e6-96231b3b80d8
---
 Basic/IdentifierTable.cpp          | 19 +++++++++++++++----
 Driver/clang.cpp                   |  1 +
 include/clang/Basic/LangOptions.h  |  3 ++-
 include/clang/Basic/TokenKinds.def |  6 +++---
 4 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/Basic/IdentifierTable.cpp b/Basic/IdentifierTable.cpp
index c1830fa0ab..73be7d34dd 100644
--- a/Basic/IdentifierTable.cpp
+++ b/Basic/IdentifierTable.cpp
@@ -68,10 +68,18 @@ IdentifierTable::IdentifierTable() : HashTable(8192) {}
 /// specified language.
 static void AddKeyword(const char *Keyword, unsigned KWLen,
                        tok::TokenKind TokenCode,
-                       int C90, int C99, int CXX, int CXX0x,
+                       int C90, int C99, int CXX, int CXX0x, int BoolSupport,
                        const LangOptions &LangOpts, IdentifierTable &Table) {
-  int Flags = LangOpts.CPlusPlus ? (LangOpts.CPlusPlus0x? CXX0x : CXX)
-                                 : (LangOpts.C99 ? C99 : C90);
+  int Flags = 0;
+  if (BoolSupport != 0) {
+    Flags = LangOpts.Boolean ? BoolSupport : 2;
+  } else if (LangOpts.CPlusPlus) {
+    Flags = LangOpts.CPlusPlus0x ? CXX0x : CXX;
+  } else if (LangOpts.C99) {
+    Flags = C99;
+  } else {
+    Flags = C90;
+  }
   
   // Don't add this keyword if disabled in this language or if an extension
   // and extensions are disabled.
@@ -126,6 +134,8 @@ void IdentifierTable::AddKeywords(const LangOptions &LangOpts) {
     CPP0xShift = 6,
     EXTCPP0x   = 1 << CPP0xShift,
     NOTCPP0x   = 2 << CPP0xShift,
+    BoolShift = 8,
+    BOOLSUPPORT = 1 << BoolShift,
     Mask     = 3
   };
   
@@ -135,7 +145,8 @@ void IdentifierTable::AddKeywords(const LangOptions &LangOpts) {
              ((FLAGS) >> C90Shift) & Mask, \
              ((FLAGS) >> C99Shift) & Mask, \
              ((FLAGS) >> CPPShift) & Mask, \
-             ((FLAGS) >> CPP0xShift) & Mask, LangOpts, *this);
+             ((FLAGS) >> CPP0xShift) & Mask, \
+             ((FLAGS) >> BoolShift) & Mask, LangOpts, *this);
 #define ALIAS(NAME, TOK) \
   AddAlias(NAME, strlen(NAME), #TOK, strlen(#TOK), LangOpts, *this);
 #define CXX_KEYWORD_OPERATOR(NAME, ALIAS) \
diff --git a/Driver/clang.cpp b/Driver/clang.cpp
index 5897da32a3..b31cee44d8 100644
--- a/Driver/clang.cpp
+++ b/Driver/clang.cpp
@@ -316,6 +316,7 @@ static void InitializeLanguageStandard(LangOptions &Options) {
   case lang_cxx98:
     Options.CPlusPlus = 1;
     Options.CXXOperatorNames = !NoOperatorNames;
+    Options.Boolean = 1;
     // FALL THROUGH.
   case lang_gnu99:
   case lang_c99:
diff --git a/include/clang/Basic/LangOptions.h b/include/clang/Basic/LangOptions.h
index afd91e2405..e47df24d46 100644
--- a/include/clang/Basic/LangOptions.h
+++ b/include/clang/Basic/LangOptions.h
@@ -35,11 +35,12 @@ struct LangOptions {
   unsigned ObjC2             : 1;  // Objective C 2 support enabled.
   
   unsigned PascalStrings     : 1;  // Allow Pascal strings
+  unsigned Boolean           : 1;  // Allow bool/true/false
   
   LangOptions() {
     Trigraphs = BCPLComment = DollarIdents = Digraphs = ObjC1 = ObjC2 = 0;
     C99 = Microsoft = CPlusPlus = CPlusPlus0x = NoExtensions = 0;
-    CXXOperatorNames = PascalStrings = 0;
+    CXXOperatorNames = PascalStrings = Boolean = 0;
   }
 };
 
diff --git a/include/clang/Basic/TokenKinds.def b/include/clang/Basic/TokenKinds.def
index d0eeada474..ca9beea886 100644
--- a/include/clang/Basic/TokenKinds.def
+++ b/include/clang/Basic/TokenKinds.def
@@ -232,7 +232,7 @@ KEYWORD(__PRETTY_FUNCTION__         , EXTC90|EXTC99|EXTCPP|EXTCPP0x) // GCC Exte
 
 // C++ 2.11p1: Keywords.
 KEYWORD(asm                         , EXTC90|EXTC99) // Exts in C90/C99
-KEYWORD(bool                        , NOTC90|NOTC99)
+KEYWORD(bool                        , BOOLSUPPORT)
 KEYWORD(catch                       , NOTC90|NOTC99)
 KEYWORD(class                       , NOTC90|NOTC99)
 KEYWORD(const_cast                  , NOTC90|NOTC99)
@@ -240,7 +240,7 @@ KEYWORD(delete                      , NOTC90|NOTC99)
 KEYWORD(dynamic_cast                , NOTC90|NOTC99)
 KEYWORD(explicit                    , NOTC90|NOTC99)
 KEYWORD(export                      , NOTC90|NOTC99)
-KEYWORD(false                       , NOTC90|NOTC99)
+KEYWORD(false                       , BOOLSUPPORT)
 KEYWORD(friend                      , NOTC90|NOTC99)
 KEYWORD(mutable                     , NOTC90|NOTC99)
 KEYWORD(namespace                   , NOTC90|NOTC99)
@@ -254,7 +254,7 @@ KEYWORD(static_cast                 , NOTC90|NOTC99)
 KEYWORD(template                    , NOTC90|NOTC99)
 KEYWORD(this                        , NOTC90|NOTC99)
 KEYWORD(throw                       , NOTC90|NOTC99)
-KEYWORD(true                        , NOTC90|NOTC99)
+KEYWORD(true                        , BOOLSUPPORT)
 KEYWORD(try                         , NOTC90|NOTC99)
 KEYWORD(typename                    , NOTC90|NOTC99)
 KEYWORD(typeid                      , NOTC90|NOTC99)
-- 
2.40.0