Fix a couple of bugs, add some new cool stuff.
1. Fix a todo in Parser::ParseTag, to recover better. On code like
that in test/Sema/decl-invalid.c it causes us to return a single
error instead of multiple.
2. Fix an error in Sema::ParseDeclarator, where it would crash if the
declarator didn't have an identifier. Instead, diagnose the problem.
3. Start adding infrastructure to track the range of locations covered
by a declspec or declarator. This is mostly implemented for declspec,
but could be improved, it is missing for declarator.
Thanks to Neil for pointing out this crash.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@40482 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Sema/ASTStreamer.cpp b/Sema/ASTStreamer.cpp
new file mode 100644
index 0000000..1057d93
--- /dev/null
+++ b/Sema/ASTStreamer.cpp
@@ -0,0 +1,111 @@
+//===--- ASTStreamer.cpp - Provide streaming interface to ASTs ------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by Chris Lattner and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the ASTStreamer interface.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Sema/ASTStreamer.h"
+#include "clang/AST/ASTContext.h"
+#include "Sema.h"
+#include "clang/Parse/Action.h"
+#include "clang/Parse/Parser.h"
+using namespace clang;
+
+namespace {
+ class ASTStreamer {
+ Parser P;
+ std::vector<Decl*> LastInGroupList;
+ public:
+ ASTStreamer(Preprocessor &pp, ASTContext &ctxt, unsigned MainFileID)
+ : P(pp, *new Sema(pp, ctxt, LastInGroupList)) {
+ pp.EnterSourceFile(MainFileID, 0, true);
+
+ // Initialize the parser.
+ P.Initialize();
+ }
+
+ /// ReadTopLevelDecl - Parse and return the next top-level declaration.
+ Decl *ReadTopLevelDecl();
+
+ void PrintStats() const;
+
+ ~ASTStreamer() {
+ P.Finalize();
+ delete &P.getActions();
+ }
+ };
+}
+
+/// ReadTopLevelDecl - Parse and return the next top-level declaration.
+///
+Decl *ASTStreamer::ReadTopLevelDecl() {
+ Parser::DeclTy *Result;
+
+ /// If the previous time through we read something like 'int X, Y', return
+ /// the next declarator.
+ if (!LastInGroupList.empty()) {
+ Result = LastInGroupList.back();
+ LastInGroupList.pop_back();
+ return static_cast<Decl*>(Result);
+ }
+
+ do {
+ if (P.ParseTopLevelDecl(Result))
+ return 0; // End of file.
+
+ // If we got a null return and something *was* parsed, try again. This
+ // is due to a top-level semicolon, an action override, or a parse error
+ // skipping something.
+ } while (Result == 0);
+
+ // If we parsed a declspec with multiple declarators, reverse the list and
+ // return the first one.
+ if (!LastInGroupList.empty()) {
+ LastInGroupList.push_back((Decl*)Result);
+ std::reverse(LastInGroupList.begin(), LastInGroupList.end());
+ Result = LastInGroupList.back();
+ LastInGroupList.pop_back();
+ }
+
+ return static_cast<Decl*>(Result);
+}
+
+void ASTStreamer::PrintStats() const {
+}
+
+//===----------------------------------------------------------------------===//
+// Public interface to the file
+//===----------------------------------------------------------------------===//
+
+/// ASTStreamer_Init - Create an ASTStreamer with the specified preprocessor
+/// and FileID.
+ASTStreamerTy *clang::ASTStreamer_Init(Preprocessor &pp, ASTContext &ctxt,
+ unsigned MainFileID) {
+ return new ASTStreamer(pp, ctxt, MainFileID);
+}
+
+/// ASTStreamer_ReadTopLevelDecl - Parse and return one top-level declaration. This
+/// returns null at end of file.
+Decl *clang::ASTStreamer_ReadTopLevelDecl(ASTStreamerTy *Streamer) {
+ return static_cast<ASTStreamer*>(Streamer)->ReadTopLevelDecl();
+}
+
+
+/// ASTStreamer_PrintStats - Emit statistic information to stderr.
+///
+void clang::ASTStreamer_PrintStats(ASTStreamerTy *Streamer) {
+ return static_cast<ASTStreamer*>(Streamer)->PrintStats();
+}
+
+/// ASTStreamer_Terminate - Gracefully shut down the streamer.
+///
+void clang::ASTStreamer_Terminate(ASTStreamerTy *Streamer) {
+ delete static_cast<ASTStreamer*>(Streamer);
+}