Initial implementation of a code-completion interface in Clang. In

essence, code completion is triggered by a magic "code completion"
token produced by the lexer [*], which the parser recognizes at
certain points in the grammar. The parser then calls into the Action
object with the appropriate CodeCompletionXXX action.

Sema implements the CodeCompletionXXX callbacks by performing minimal
translation, then forwarding them to a CodeCompletionConsumer
subclass, which uses the results of semantic analysis to provide
code-completion results. At present, only a single, "printing" code
completion consumer is available, for regression testing and
debugging. However, the design is meant to permit other
code-completion consumers.

This initial commit contains two code-completion actions: one for
member access, e.g., "x." or "p->", and one for
nested-name-specifiers, e.g., "std::". More code-completion actions
will follow, along with improved gathering of code-completion results
for the various contexts.

[*] In the current -code-completion-dump testing/debugging mode, the
file is truncated at the completion point and EOF is translated into
"code completion".


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@82166 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/include/clang/Lex/Preprocessor.h b/include/clang/Lex/Preprocessor.h
index 0765ac391b..17823cd257 100644
--- a/include/clang/Lex/Preprocessor.h
+++ b/include/clang/Lex/Preprocessor.h
@@ -92,6 +92,10 @@ class Preprocessor {
   bool DisableMacroExpansion : 1;  // True if macro expansion is disabled.
   bool InMacroArgs : 1;            // True if parsing fn macro invocation args.
 
+  /// \brief True if the end-of-file of the main file should be treated as
+  /// a code-completion token.
+  bool IsMainFileEofCodeCompletion : 1;
+
   /// Identifiers - This is mapping/lookup information for all identifiers in
   /// the program, including program keywords.
   IdentifierTable Identifiers;
@@ -259,6 +263,12 @@ public:
     Callbacks = C;
   }
 
+  /// \brief Note that, for the main source file, the end-of-file should be
+  /// treated as a code-completion token.
+  void SetMainFileEofCodeCompletion() {
+    IsMainFileEofCodeCompletion = true;
+  }
+  
   /// getMacroInfo - Given an identifier, return the MacroInfo it is #defined to
   /// or null if it isn't #define'd.
   MacroInfo *getMacroInfo(IdentifierInfo *II) const {