cpplib: Header name syntax

[Neil Booth]

The parsing of header names is already correct so that the terminating
" or > cannot be escaped.  This disallows multiline strings in
#include family directives, and adds a test for all this behaviour.

Neil.

	* cpplex.c (parse_string): Don't allow multiline strings in
	#include family directives.
	* gcc.dg/cpp/include2.c: New tests.

Index: cpplex.c
===================================================================
RCS file: /cvs/gcc/egcs/gcc/cpplex.c,v
retrieving revision 1.110
diff -u -p -r1.110 cpplex.c
--- cpplex.c	2000/11/01 07:32:23	1.110
+++ cpplex.c	2000/11/04 11:08:16
@@ -675,8 +675,8 @@ parse_string (pfile, token, terminator)
 	  /* Character constants and header names may not extend over
 	     multiple lines.  In Standard C, neither may strings.
 	     Unfortunately, we accept multiline strings as an
-	     extension.  */
-	  if (terminator != '"')
+	     extension, except in #include family directives.  */
+	  if (terminator != '"' || pfile->state.angled_headers)
 	    {
 	      unterminated (pfile, terminator);
 	      break;
Index: testsuite/gcc.dg/cpp/include2.c
===================================================================
RCS file: include2.c
diff -N include2.c
--- /dev/null	Tue May  5 13:32:27 1998
+++ include2.c	Sat Nov  4 03:08:24 2000
@@ -0,0 +1,15 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.  */
+
+/* { dg-do preprocess } */
+
+/* Tests that #include does not allow the terminating '>' or '"' to be
+   escaped, as per the standard.  */
+
+/* Source: Neil Booth, 4 Nov 2000.  */
+
+#include <silly\>>  /* { dg-warning "extra tokens" "" } */
+#include "silly\""  /* { dg-error "missing" "" } */
+
+/* { dg-error "No such file" "" { target *-*-* } 10 } */
+/* { dg-error "No such file" "" { target *-*-* } 11 } */
+/* { dg-warning "extra tokens" "" { target *-*-* } 11 } */