diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -3270,12 +3270,13 @@
     return Right.WhitespaceRange.getBegin() != Right.WhitespaceRange.getEnd();
   if (Right.is(tok::coloncolon) &&
       !Left.isOneOf(tok::l_brace, tok::comment, tok::l_paren))
+    // Put a space between < and :: in vector< ::std::string >
     return (Left.is(TT_TemplateOpener) &&
-            Style.Standard < FormatStyle::LS_Cpp11) ||
+            (Style.Standard < FormatStyle::LS_Cpp11 || Style.SpacesInAngles)) ||
            !(Left.isOneOf(tok::l_paren, tok::r_paren, tok::l_square,
-                          tok::kw___super, TT_TemplateCloser,
-                          TT_TemplateOpener)) ||
-           (Left.is(tok ::l_paren) && Style.SpacesInParentheses);
+                          tok::kw___super, TT_TemplateOpener,
+                          TT_TemplateCloser)) ||
+           (Left.is(tok::l_paren) && Style.SpacesInParentheses);
   if ((Left.is(TT_TemplateOpener)) != (Right.is(TT_TemplateCloser)))
     return Style.SpacesInAngles;
   // Space before TT_StructuredBindingLSquare.
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -8526,6 +8526,20 @@
   verifyFormat("vector< int > x{ };", SpaceBetweenBraces);
 }
 
+TEST_F(FormatTest, FormatSpacesInAngles) {
+  FormatStyle SpaceInAngles = getLLVMStyle();
+  SpaceInAngles.SpacesInAngles = true;
+  verifyFormat("vector< ::std::string > x1;", SpaceInAngles);
+  verifyFormat("Foo< int, Bar > x2;", SpaceInAngles);
+  verifyFormat("Foo< ::int, ::Bar > x3;", SpaceInAngles);
+
+  SpaceInAngles.SpacesInAngles = false;
+  verifyFormat("vector<::std::string> x4;", SpaceInAngles);
+  verifyFormat("vector<int> x5;", SpaceInAngles);
+  verifyFormat("Foo<int, Bar> x6;", SpaceInAngles);
+  verifyFormat("Foo<::int, ::Bar> x7;", SpaceInAngles);
+}
+
 TEST_F(FormatTest, FormatsBracedListsInColumnLayout) {
   verifyFormat("vector<int> x = {1, 22, 333, 4444, 55555, 666666, 7777777,\n"
                "                 1, 22, 333, 4444, 55555, 666666, 7777777,\n"