Add the clang library to the repo (with some of my changes, too).

1 files changed, 34 insertions, 0 deletions

diff --git a/clang/test/Preprocessor/macro_paste_bad.c b/clang/test/Preprocessor/macro_paste_bad.c
new file mode 100644
index 0000000..0a028a4
--- /dev/null
+++ b/clang/test/Preprocessor/macro_paste_bad.c
@@ -0,0 +1,34 @@
+// RUN: %clang_cc1 -Eonly -verify -pedantic %s
+// pasting ""x"" and ""+"" does not give a valid preprocessing token
+#define XYZ  x ## + 
+XYZ   // expected-error {{pasting formed 'x+', an invalid preprocessing token}}
+#define XXYZ  . ## test
+XXYZ   // expected-error {{pasting formed '.test', an invalid preprocessing token}}
+
+// GCC PR 20077
+
+#define a   a ## ## // expected-error {{'##' cannot appear at end of macro expansion}}
+#define b() b ## ## // expected-error {{'##' cannot appear at end of macro expansion}}
+#define c   c ##    // expected-error {{'##' cannot appear at end of macro expansion}}
+#define d() d ##    // expected-error {{'##' cannot appear at end of macro expansion}}
+
+
+#define e   ## ## e // expected-error {{'##' cannot appear at start of macro expansion}}
+#define f() ## ## f // expected-error {{'##' cannot appear at start of macro expansion}}
+#define g   ## g    // expected-error {{'##' cannot appear at start of macro expansion}}
+#define h() ## h    // expected-error {{'##' cannot appear at start of macro expansion}}
+#define i   ##      // expected-error {{'##' cannot appear at start of macro expansion}}
+#define j() ##      // expected-error {{'##' cannot appear at start of macro expansion}}
+
+// Invalid token pasting.
+// PR3918
+
+// When pasting creates poisoned identifiers, we error.
+#pragma GCC poison BLARG
+BLARG  // expected-error {{attempt to use a poisoned identifier}}
+#define XX BL ## ARG
+XX     // expected-error {{attempt to use a poisoned identifier}}
+
+#define VA __VA_ ## ARGS__
+int VA;   // expected-warning {{__VA_ARGS__ can only appear in the expansion of a C99 variadic macro}}
+