Improve code completion by introducing patterns for the various C and

C++ grammatical constructs that show up in top-level (namespace-level)
declarations, member declarations, template declarations, statements,
expressions, conditions, etc. For example, we now provide a pattern
for

  static_cast<type>(expr)

when we can have an expression, or

  using namespace identifier;

when we can have a using directive.

Also, improves the results of code completion at the beginning of a
top-level declaration. Previously, we would see value names (function
names, global variables, etc.); now we see types, namespace names,
etc., but no values.

llvm-svn: 93134

5 files changed, 23 insertions, 9 deletions

diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index f429ac991d8..bc6dda8ed79 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -814,7 +814,14 @@ void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
                                         AccessSpecifier AS,
                                         DeclSpecContext DSContext) {
   if (Tok.is(tok::code_completion)) {
-    Actions.CodeCompleteOrdinaryName(CurScope);
+    Action::CodeCompletionContext CCC = Action::CCC_Namespace;
+    if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate)
+      CCC = DSContext == DSC_class? Action::CCC_MemberTemplate 
+                                  : Action::CCC_Template;
+    else if (DSContext == DSC_class)
+      CCC = Action::CCC_Class;
+
+    Actions.CodeCompleteOrdinaryName(CurScope, CCC);
     ConsumeToken();
   }
   
diff --git a/clang/lib/Parse/ParseExpr.cpp b/clang/lib/Parse/ParseExpr.cpp
index 4d6988d5f2c..669575c4f03 100644
--- a/clang/lib/Parse/ParseExpr.cpp
+++ b/clang/lib/Parse/ParseExpr.cpp
@@ -200,11 +200,6 @@ static prec::Level getBinOpPrecedence(tok::TokenKind Kind,
 ///         expression ',' assignment-expression
 ///
 Parser::OwningExprResult Parser::ParseExpression() {
-  if (Tok.is(tok::code_completion)) {
-    Actions.CodeCompleteOrdinaryName(CurScope);
-    ConsumeToken();
-  }
-
   OwningExprResult LHS(ParseAssignmentExpression());
   if (LHS.isInvalid()) return move(LHS);
 
@@ -248,6 +243,11 @@ Parser::ParseExpressionWithLeadingExtension(SourceLocation ExtLoc) {
 /// ParseAssignmentExpression - Parse an expr that doesn't include commas.
 ///
 Parser::OwningExprResult Parser::ParseAssignmentExpression() {
+  if (Tok.is(tok::code_completion)) {
+    Actions.CodeCompleteOrdinaryName(CurScope, Action::CCC_Expression);
+    ConsumeToken();
+  }
+
   if (Tok.is(tok::kw_throw))
     return ParseThrowExpression();
 
diff --git a/clang/lib/Parse/ParseExprCXX.cpp b/clang/lib/Parse/ParseExprCXX.cpp
index abd26d7d490..3efa6f0180c 100644
--- a/clang/lib/Parse/ParseExprCXX.cpp
+++ b/clang/lib/Parse/ParseExprCXX.cpp
@@ -585,6 +585,11 @@ Parser::ParseCXXTypeConstructExpression(const DeclSpec &DS) {
 /// \returns true if there was a parsing, false otherwise.
 bool Parser::ParseCXXCondition(OwningExprResult &ExprResult,
                                DeclPtrTy &DeclResult) {
+  if (Tok.is(tok::code_completion)) {
+    Actions.CodeCompleteOrdinaryName(CurScope, Action::CCC_Condition);
+    ConsumeToken();
+  }
+
   if (!isCXXConditionDeclaration()) {
     ExprResult = ParseExpression(); // expression
     DeclResult = DeclPtrTy();
diff --git a/clang/lib/Parse/ParseStmt.cpp b/clang/lib/Parse/ParseStmt.cpp
index 277cc91d37c..21e960aa817 100644
--- a/clang/lib/Parse/ParseStmt.cpp
+++ b/clang/lib/Parse/ParseStmt.cpp
@@ -95,7 +95,7 @@ Parser::ParseStatementOrDeclaration(bool OnlyStatement) {
     }
 
   case tok::code_completion:
-    Actions.CodeCompleteOrdinaryName(CurScope);
+    Actions.CodeCompleteOrdinaryName(CurScope, Action::CCC_Statement);
     ConsumeToken();
     return ParseStatementOrDeclaration(OnlyStatement);
       
@@ -955,7 +955,9 @@ Parser::OwningStmtResult Parser::ParseForStatement(AttributeList *Attr) {
   DeclPtrTy SecondVar;
   
   if (Tok.is(tok::code_completion)) {
-    Actions.CodeCompleteOrdinaryName(CurScope);
+    Actions.CodeCompleteOrdinaryName(CurScope, 
+                                     C99orCXXorObjC? Action::CCC_ForInit
+                                                   : Action::CCC_Expression);
     ConsumeToken();
   }
   
diff --git a/clang/lib/Parse/Parser.cpp b/clang/lib/Parse/Parser.cpp
index 52c0153bfad..bf0c7b286a7 100644
--- a/clang/lib/Parse/Parser.cpp
+++ b/clang/lib/Parse/Parser.cpp
@@ -455,7 +455,7 @@ Parser::DeclGroupPtrTy Parser::ParseExternalDeclaration(CXX0XAttributeList Attr)
     SingleDecl = ParseObjCMethodDefinition();
     break;
   case tok::code_completion:
-    Actions.CodeCompleteOrdinaryName(CurScope);
+    Actions.CodeCompleteOrdinaryName(CurScope, Action::CCC_Namespace);
     ConsumeToken();
     return ParseExternalDeclaration(Attr);
   case tok::kw_using: