[PATCH] D21075: Correct invalid end location in diagnostics for some identifiers.

[Erik Verbruggen via Phabricator via cfe-commits]

erikjv updated this revision to Diff 80735.

https://reviews.llvm.org/D21075

Files:
  lib/Parse/ParseDecl.cpp
  lib/Sema/SemaExpr.cpp
  test/Index/diagnostic-ranges.cpp


Index: test/Index/diagnostic-ranges.cpp
===================================================================
--- /dev/null
+++ test/Index/diagnostic-ranges.cpp
@@ -0,0 +1,23 @@
+// RUN: c-index-test -test-load-source all %s > /dev/null 2> %t.err
+// RUN: FileCheck < %t.err -check-prefix=CHECK-RANGE %s
+
+struct Foo {
+  someIdentifierLeadingToAnInvalidRange;
+};
+
+template <typename T>
+struct Bar {
+  Bar(const T&) {}
+};
+  
+void f()
+{
+  for (Bar<__typeof__(v.x)> container(v.x); true; )
+    return;
+}
+
+// CHECK-RANGE: diagnostic-ranges.cpp:5:3: error: C++ requires a type specifier for all declarations
+// CHECK-RANGE: diagnostic-ranges.cpp:15:39: error: use of undeclared identifier 'v'
+// CHECK-RANGE: diagnostic-ranges.cpp:5:3:{5:3-5:40}: error: C++ requires a type specifier for all declarations
+// CHECK-RANGE: diagnostic-ranges.cpp:15:23:{15:23-15:24}: error: use of undeclared identifier 'v'
+
Index: lib/Sema/SemaExpr.cpp
===================================================================
--- lib/Sema/SemaExpr.cpp
+++ lib/Sema/SemaExpr.cpp
@@ -2042,7 +2042,9 @@
   }
 
   // Give up, we can't recover.
-  Diag(R.getNameLoc(), diagnostic) << Name;
+  auto Builder = Diag(R.getNameLoc(), diagnostic) << Name;
+  if (Name.isIdentifier())
+    Builder << SourceRange(R.getNameLoc());
   return true;
 }
 
Index: lib/Parse/ParseDecl.cpp
===================================================================
--- lib/Parse/ParseDecl.cpp
+++ lib/Parse/ParseDecl.cpp
@@ -2697,12 +2697,9 @@
                                         AccessSpecifier AS,
                                         DeclSpecContext DSContext,
                                         LateParsedAttrList *LateAttrs) {
-  if (DS.getSourceRange().isInvalid()) {
-    // Start the range at the current token but make the end of the range
-    // invalid.  This will make the entire range invalid unless we successfully
-    // consume a token.
+  if (DS.getSourceRange().isInvalid() && !Tok.is(tok::eof)) {
     DS.SetRangeStart(Tok.getLocation());
-    DS.SetRangeEnd(SourceLocation());
+    DS.SetRangeEnd(Tok.getLocation());
   }
 
   bool EnteringContext = (DSContext == DSC_class || DSContext == DSC_top_level);


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