This old one says the C++98 ANSI doesn't have hex float literals and
should error gracefully.
Fixed by changing a language feature flag as suggested by the audit
trail and by adding an error message.
Built and tested on x86_64-linux.
OK?
libcpp/
2014-08-27 Edward Smith-Rowland <3dw...@verizon.net>
PR cpp/23827 - standard C++ should not have hex float preprocessor
tokens
* libcpp/init.c (lang_flags): Change CXX98 flag for extended numbers
from 1 to 0.
* libcpp/expr.c (cpp_classify_number): Weite error message for improper
use of hex floating literal.
gcc/testsuite/
2014-08-27 Edward Smith-Rowland <3dw...@verizon.net>
PR cpp/23827 - standard C++ should not have hex float preprocessor
tokens
* g++.dg/cpp/pr23827_cxx11.C: New.
* g++.dg/cpp/pr23827_cxx98.C: New.
* g++.dg/cpp/pr23827_cxx98_neg.C: New.
* gcc.dg/cpp/pr23827_c90.c: New.
* gcc.dg/cpp/pr23827_c90_neg.c: New.
* gcc.dg/cpp/pr23827_c99.c: New.
Index: libcpp/init.c
===================================================================
--- libcpp/init.c (revision 214556)
+++ libcpp/init.c (working copy)
@@ -103,7 +103,7 @@
/* STDC99 */ { 1, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0,
1 },
/* STDC11 */ { 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0,
1 },
/* GNUCXX */ { 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0,
0 },
- /* CXX98 */ { 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0,
1 },
+ /* CXX98 */ { 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0,
1 },
/* GNUCXX11 */ { 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0,
0 },
/* CXX11 */ { 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0,
1 },
/* GNUCXX14 */ { 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1,
0 },
Index: libcpp/expr.c
===================================================================
--- libcpp/expr.c (revision 214556)
+++ libcpp/expr.c (working copy)
@@ -540,9 +540,16 @@
SYNTAX_ERROR_AT (virtual_location,
"no digits in hexadecimal floating constant");
- if (radix == 16 && CPP_PEDANTIC (pfile) && !CPP_OPTION (pfile, c99))
- cpp_error_with_line (pfile, CPP_DL_PEDWARN, virtual_location, 0,
- "use of C99 hexadecimal floating constant");
+ if (radix == 16 && CPP_PEDANTIC (pfile)
+ && !CPP_OPTION (pfile, extended_numbers))
+ {
+ if (CPP_OPTION (pfile, cplusplus))
+ cpp_error_with_line (pfile, CPP_DL_PEDWARN, virtual_location, 0,
+ "use of C++11 hexadecimal floating constant");
+ else
+ cpp_error_with_line (pfile, CPP_DL_PEDWARN, virtual_location, 0,
+ "use of C99 hexadecimal floating constant");
+ }
if (float_flag == AFTER_EXPON)
{
Index: gcc/testsuite/g++.dg/cpp/pr23827_cxx11.C
===================================================================
--- gcc/testsuite/g++.dg/cpp/pr23827_cxx11.C (revision 0)
+++ gcc/testsuite/g++.dg/cpp/pr23827_cxx11.C (working copy)
@@ -0,0 +1,23 @@
+// { dg-do run { target c++11 } }
+// { dg-options "-pedantic-errors" }
+
+#define f (
+#define l )
+#define str(x) #x
+#define xstr(x) str(x)
+
+// C90 and C++98: "0x1p+( 0x1p+)"
+// C99 and C++11: "0x1p+f 0x1p+l"
+const char *s = xstr(0x1p+f 0x1p+l);
+
+extern "C" void abort (void);
+extern "C" int strcmp (const char *, const char *);
+
+int
+main()
+{
+ if (strcmp (s, "0x1p+( 0x1p+)"))
+ return 0; // Correct C99 and C++11 behavior.
+ else
+ abort (); // Correct C90 and C++ behavior.
+}
Index: gcc/testsuite/g++.dg/cpp/pr23827_cxx98.C
===================================================================
--- gcc/testsuite/g++.dg/cpp/pr23827_cxx98.C (revision 0)
+++ gcc/testsuite/g++.dg/cpp/pr23827_cxx98.C (working copy)
@@ -0,0 +1,23 @@
+// { dg-do run { target c++98_only } }
+// { dg-options "-ansi -pedantic-errors" }
+
+#define f (
+#define l )
+#define str(x) #x
+#define xstr(x) str(x)
+
+// C90 and C++98: "0x1p+( 0x1p+)"
+// C99 and C++11: "0x1p+f 0x1p+l"
+const char *s = xstr(0x1p+f 0x1p+l);
+
+extern "C" void abort (void);
+extern "C" int strcmp (const char *, const char *);
+
+int
+main()
+{
+ if (strcmp (s, "0x1p+( 0x1p+)"))
+ abort (); // Correct C99 and C++11 behavior.
+ else
+ return 0; // Correct C90 and C++ behavior.
+}
Index: gcc/testsuite/g++.dg/cpp/pr23827_cxx98_neg.C
===================================================================
--- gcc/testsuite/g++.dg/cpp/pr23827_cxx98_neg.C (revision 0)
+++ gcc/testsuite/g++.dg/cpp/pr23827_cxx98_neg.C (working copy)
@@ -0,0 +1,4 @@
+// { dg-do compile { target c++98_only } }
+/* { dg-options "-ansi -pedantic-errors" } */
+
+double x = 0x3.1415babep0; // { dg-error "use of C..11 hexadecimal floating
constant" }
Index: gcc/testsuite/gcc.dg/cpp/pr23827_c90.c
===================================================================
--- gcc/testsuite/gcc.dg/cpp/pr23827_c90.c (revision 0)
+++ gcc/testsuite/gcc.dg/cpp/pr23827_c90.c (working copy)
@@ -0,0 +1,23 @@
+/* { dg-do run } */
+/* { dg-options "-std=c90 -pedantic-errors" } */
+
+#define f (
+#define l )
+#define str(x) #x
+#define xstr(x) str(x)
+
+/* C90 and C++98: "0x1p+( 0x1p+)" */
+/* C99 and C++11: "0x1p+f 0x1p+l" */
+const char *s = xstr(0x1p+f 0x1p+l);
+
+void abort (void);
+int strcmp (const char *, const char *);
+
+int
+main()
+{
+ if (strcmp (s, "0x1p+( 0x1p+)"))
+ abort (); /* Correct C99 and C++11 behavior. */
+ else
+ return 0; /* Correct C90 and C++ behavior. */
+}
Index: gcc/testsuite/gcc.dg/cpp/pr23827_c90_neg.c
===================================================================
--- gcc/testsuite/gcc.dg/cpp/pr23827_c90_neg.c (revision 0)
+++ gcc/testsuite/gcc.dg/cpp/pr23827_c90_neg.c (working copy)
@@ -0,0 +1,4 @@
+/* { dg-do compile } */
+/* { dg-options "-std=c90 -pedantic-errors" } */
+
+double x = 0x3.1415babep0; /* { dg-error "use of C99 hexadecimal floating
constant" } */
Index: gcc/testsuite/gcc.dg/cpp/pr23827_c99.c
===================================================================
--- gcc/testsuite/gcc.dg/cpp/pr23827_c99.c (revision 0)
+++ gcc/testsuite/gcc.dg/cpp/pr23827_c99.c (working copy)
@@ -0,0 +1,23 @@
+/* { dg-do run { target c++11 } } */
+/* { dg-options "-pedantic-errors" } */
+
+#define f (
+#define l )
+#define str(x) #x
+#define xstr(x) str(x)
+
+/* C90 and C++98: "0x1p+( 0x1p+)" */
+/* C99 and C++11: "0x1p+f 0x1p+l" */
+const char *s = xstr(0x1p+f 0x1p+l);
+
+void abort (void);
+int strcmp (const char *, const char *);
+
+int
+main()
+{
+ if (strcmp (s, "0x1p+( 0x1p+)"))
+ return 0; /* Correct C99 and C++11 behavior. */
+ else
+ abort (); /* Correct C90 and C++ behavior. */
+}
