Introduce serialization and deserialization of diagnostic information

so that CIndex can report diagnostics through the normal mechanisms
even when executing Clang in a separate process. This applies both
when performing code completion and when using ASTs as an intermediary
for clang_createTranslationUnitFromSourceFile().

The serialized format is not perfect at the moment, because it does
not encapsulate macro-instantiation information. Instead, it maps all
source locations back to the instantiation location. However, it does
maintain source-range and fix-it information. To get perfect fidelity
from the serialized format would require serializing a large chunk of
the source manager; at present, it isn't clear if this code will live
long enough for that to matter.

llvm-svn: 94740

1 files changed, 16 insertions, 0 deletions

diff --git a/clang/test/Index/code-complete-errors.c b/clang/test/Index/code-complete-errors.c
new file mode 100644
index 00000000000..43bc5d8a1a2
--- /dev/null
+++ b/clang/test/Index/code-complete-errors.c
@@ -0,0 +1,16 @@
+_Complex cd; // CHECK: code-complete-errors.c:1:1: warning: plain '_Complex' requires a type specifier; assuming '_Complex double'
+
+struct s {
+  int x, y;;
+};
+
+struct s s0 = { y: 5 }; // CHECK: code-complete-errors.c:7:20: warning: use of GNU old-style field designator extension
+
+int f(int *ptr1, float *ptr2) {
+  return ptr1 != ptr2; // CHECK: code-complete-errors.c:10:15: warning: comparison of distinct pointer types ('int *' and 'float *')
+}
+
+void g() {  }
+
+// RUN: c-index-test -code-completion-at=%s:13:12 %s 2> %t
+// RUN: FileCheck -check-prefix=CHECK %s < %t