Error if an anonymous DiagGroup is referenced multiple times.
Not only is this inefficient for TableGen, it's annoying for maintenance
when renaming warning flags (unusual) or adding those flags to a group
(more likely).
This uses the new fix-it infrastructure for LLVM's SourceMgr/SMDiagnostic,
as well as a few changes to TableGen to track more source information.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172087 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/TableGen/anonymous-groups.td b/test/TableGen/anonymous-groups.td
new file mode 100644
index 0000000..acc0a21
--- /dev/null
+++ b/test/TableGen/anonymous-groups.td
@@ -0,0 +1,42 @@
+// RUN: clang-tblgen -gen-clang-diag-groups -I%S %s -o /dev/null 2>&1 | FileCheck --strict-whitespace %s
+include "DiagnosticBase.inc"
+
+// Do not move this line; it is referred to by absolute line number in the
+// FileCheck lines below.
+def NamedGroup : DiagGroup<"name">;
+
+
+def InNamedGroup : Warning<"">, InGroup<DiagGroup<"name">>;
+// CHECK: anonymous-groups.td:[[@LINE-1]]:41: error: group 'name' is referred to anonymously
+// CHECK-NEXT: {{^def InNamedGroup : Warning<"">, InGroup<DiagGroup<"name">>;}}
+// CHECK-NEXT: {{^ ~~~~~~~~\^~~~~~~~~~~~~~~~~~}}
+// CHECK-NEXT: {{^ InGroup<NamedGroup>}}
+// CHECK-NEXT: anonymous-groups.td:6:1: note: group defined here
+// CHECK-NEXT: def NamedGroup : DiagGroup<"name">;
+// CHECK-NEXT: ^
+
+
+def AlsoInNamedGroup : Warning<"">, InGroup < DiagGroup<"name"> >;
+// CHECK: anonymous-groups.td:[[@LINE-1]]:48: error: group 'name' is referred to anonymously
+// CHECK-NEXT: {{^def AlsoInNamedGroup : Warning<"">, InGroup < DiagGroup<"name"> >;}}
+// CHECK-NEXT: {{^ ~~~~~~~~~~~\^~~~~~~~~~~~~~~~~~~}}
+// CHECK-NEXT: {{^ InGroup<NamedGroup>}}
+// CHECK-NEXT: anonymous-groups.td:6:1: note: group defined here
+// CHECK-NEXT: def NamedGroup : DiagGroup<"name">;
+// CHECK-NEXT: ^
+
+
+def AnonymousGroup : Warning<"">, InGroup<DiagGroup<"anonymous">>;
+def AlsoAnonymousGroup : Warning<"">, InGroup<DiagGroup<"anonymous">>;
+def AnonymousGroupAgain : Warning<"">,
+ InGroup<DiagGroup<"anonymous">>;
+
+// CHECK: anonymous-groups.td:[[@LINE-5]]:43: error: group 'anonymous' is referred to anonymously
+// CHECK-NEXT: {{^def AnonymousGroup : Warning<"">, InGroup<DiagGroup<"anonymous">>;}}
+// CHECK-NEXT: {{^ ~~~~~~~~\^~~~~~~~~~~~~~~~~~~~~~~}}
+// CHECK-NEXT: anonymous-groups.td:[[@LINE-7]]:47: note: also referenced here
+// CHECK-NEXT: {{^def AlsoAnonymousGroup : Warning<"">, InGroup<DiagGroup<"anonymous">>;}}
+// CHECK-NEXT: {{^ ~~~~~~~~\^~~~~~~~~~~~~~~~~~~~~~~}}
+// CHECK-NEXT: anonymous-groups.td:[[@LINE-8]]:11: note: also referenced here
+// CHECK-NEXT: {{^ InGroup<DiagGroup<"anonymous">>;}}
+// CHECK-NEXT: {{^ ~~~~~~~~\^~~~~~~~~~~~~~~~~~~~~~~}}