Fix handling range in removeText().

Turns out removeText( SourceRange ) treats it as a token range, so it's
not always character-exact if used for removal of only several characters
from a token (e.g. an identifier).

Change-Id: I0223d52da90f9535d9ef1d48b0f56d69131536c8

compilerplugins/clang/plugin.cxx

@@ -105,9 +105,22 @@ bool RewritePlugin::insertTextBefore( SourceLocation Loc, StringRef Str )
     return true;
     }
 
+// These two removeText() overloads should not be merged into one, as the SourceRange
+// one uses a token range (which counts token length for some reason), so exact length
+// given to this overload would not match afterwards.
 bool RewritePlugin::removeText( SourceLocation Start, unsigned Length, RewriteOptions opts )
     {
-    return removeText( SourceRange( Start, Start.getLocWithOffset( Length )), opts );
+    if( opts.RemoveWholeStatement )
+        {
+        SourceRange range( Start, Start.getLocWithOffset( Length - 1 ));
+        if( !adjustForWholeStatement( &range ))
+            return reportEditFailure( Start );
+        Start = range.getBegin();
+        Length = range.getEnd().getRawEncoding() - range.getBegin().getRawEncoding();
+        }
+    if( rewriter.RemoveText( Start, Length, opts ))
+        return reportEditFailure( Start );
+    return true;
     }
 
 bool RewritePlugin::removeText( SourceRange range, RewriteOptions opts )

compilerplugins/clang/plugin.hxx

@@ -101,7 +101,7 @@ class RewritePlugin
         bool insertTextAfterToken( SourceLocation Loc, StringRef Str );
         bool insertTextBefore( SourceLocation Loc, StringRef Str );
         bool removeText( SourceLocation Start, unsigned Length, RewriteOptions opts = RewriteOptions());
-        // CharSourceRange not supported, unless really needed, as it makes RemoveSemicolon more complicated
+        // CharSourceRange not supported, unless really needed, as it needs handling for RemoveWholeStatement.
         //bool removeText( CharSourceRange range, RewriteOptions opts = RewriteOptions());
         bool removeText( SourceRange range, RewriteOptions opts = RewriteOptions());
         bool replaceText( SourceLocation Start, unsigned OrigLength, StringRef NewStr );