* gcc.dg/cpp/avoidpaste1.c: Test case.

From-SVN: r39319

gcc/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+2001-01-28  Neil Booth  <neil@daikokuya.demon.co.uk>
+
+        * gcc.dg/cpp/avoidpaste1.c: Test case.
+
 2001-01-28  Jakub Jelinek  <jakub@redhat.com>
 
 	* g++.old-deja/g++.other/inline18.C: New test.

gcc/testsuite/gcc.dg/cpp/avoidpaste1.c

@@ -0,0 +1,32 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.  */
+
+/* { dg-do preprocess } */
+
+/* This tests that we avoid accidental pasting only before and after
+   macros and arguments, and not when the tokens are already pasted
+   in the souce file (e.g. "::" in a C source file).
+
+   Neil Booth, 28 Jan 2001.  */
+
+#define f(x) x
+#define g
+
+/* This should preprocess as
+
+:: : : : : :^:
+: : : .. . 0
+
+It relies on the fact that even preprocessing C we bother to separate
+the colons of C++'s :: operator.  If we confine this behaviour to C++
+in future, this test needs to change.  */
+
+:: :g: :f(): :f(^):
+:f(:): .. .__INCLUDE_LEVEL__	/* Check builtins, too.  */
+
+/*
+   { dg-final { if ![file exists avoidpaste1.i] { return }                } }
+   { dg-final { if { [grep avoidpaste1.i ":: : : : : :\\^:"] != "" } \{   } }
+   { dg-final { if { [grep avoidpaste1.i ": : : \\\.\\\. \\\. 0"] != "" } \{  } }
+   { dg-final { return \} \}                                              } }
+   { dg-final { fail "avoidpaste1.c: paste avoidance"                     } }
+*/