[analyzer] Change PathPieces to be a wrapper around an ilist of (through indirection) PathDiagnosticPieces.

Much of this patch outside of PathDiagnostics.h are just minor
syntactic changes due to the return type for operator* and the like
changing for the iterator, so the real focus should be on
PathPieces itself.

This change is motivated so that we can do efficient insertion
and removal of individual pieces from within a PathPiece, just like
this was a kind of "IR" for static analyzer diagnostics.  We
currently implement path transformations by iterating over an
entire PathPiece and making a copy.  This isn't very natural for
some algorithms.

We use an ilist here instead of std::list because we want operations
to rip out/insert nodes in place, just like IR manipulation.  This
isn't being used yet, but opens the door for more powerful
transformation algorithms on diagnostic paths.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180741 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 9 deletions

diff --git a/lib/StaticAnalyzer/Core/HTMLDiagnostics.cpp b/lib/StaticAnalyzer/Core/HTMLDiagnostics.cpp
index 73426da2b4..a5fe300fb6 100644
--- a/lib/StaticAnalyzer/Core/HTMLDiagnostics.cpp
+++ b/lib/StaticAnalyzer/Core/HTMLDiagnostics.cpp
@@ -126,10 +126,10 @@ void HTMLDiagnostics::ReportDiag(const PathDiagnostic& D,
 
   // The path as already been prechecked that all parts of the path are
   // from the same file and that it is non-empty.
-  const SourceManager &SMgr = (*path.begin())->getLocation().getManager();
+  const SourceManager &SMgr = path.begin()->getLocation().getManager();
   assert(!path.empty());
   FileID FID =
-    (*path.begin())->getLocation().asLocation().getExpansionLoc().getFileID();
+    path.begin()->getLocation().asLocation().getExpansionLoc().getFileID();
   assert(!FID.isInvalid());
 
   // Create a new rewriter to generate HTML.
@@ -139,10 +139,10 @@ void HTMLDiagnostics::ReportDiag(const PathDiagnostic& D,
   unsigned n = path.size();
   unsigned max = n;
 
-  for (PathPieces::const_reverse_iterator I = path.rbegin(), 
+  for (PathPieces::reverse_iterator I = path.rbegin(), 
        E = path.rend();
         I != E; ++I, --n)
-    HandlePiece(R, FID, **I, n, max);
+    HandlePiece(R, FID, *I, n, max);
 
   // Add line numbers, header, footer, etc.
 
@@ -185,9 +185,9 @@ void HTMLDiagnostics::ReportDiag(const PathDiagnostic& D,
       << html::EscapeText(Entry->getName())
       << "</td></tr>\n<tr><td class=\"rowname\">Location:</td><td>"
          "<a href=\"#EndPath\">line "
-      << (*path.rbegin())->getLocation().asLocation().getExpansionLineNumber()
+      << path.rbegin()->getLocation().asLocation().getExpansionLineNumber()
       << ", column "
-      << (*path.rbegin())->getLocation().asLocation().getExpansionColumnNumber()
+      << path.rbegin()->getLocation().asLocation().getExpansionColumnNumber()
       << "</a></td></tr>\n"
          "<tr><td class=\"rowname\">Description:</td><td>"
       << D.getVerboseDescription() << "</td></tr>\n";
@@ -503,16 +503,16 @@ unsigned HTMLDiagnostics::ProcessMacroPiece(raw_ostream &os,
                                             const PathDiagnosticMacroPiece& P,
                                             unsigned num) {
 
-  for (PathPieces::const_iterator I = P.subPieces.begin(), E=P.subPieces.end();
+  for (PathPieces::iterator I = P.subPieces.begin(), E=P.subPieces.end();
         I!=E; ++I) {
 
     if (const PathDiagnosticMacroPiece *MP =
-          dyn_cast<PathDiagnosticMacroPiece>(*I)) {
+          dyn_cast<PathDiagnosticMacroPiece>(&*I)) {
       num = ProcessMacroPiece(os, *MP, num);
       continue;
     }
 
-    if (PathDiagnosticEventPiece *EP = dyn_cast<PathDiagnosticEventPiece>(*I)) {
+    if (PathDiagnosticEventPiece *EP = dyn_cast<PathDiagnosticEventPiece>(&*I)){
       os << "<div class=\"msg msgEvent\" style=\"width:94%; "
             "margin-left:5px\">"
             "<table class=\"msgT\"><tr>"