gcc/

	PR c/29027
	* c-lex.c (interpret_float): Default (no suffix) is double.

libcpp/
	PR c/29027
	* include/cpplib.h (CPP_N_DEFAULT): Define.
	* expr.c (interpret_float_suffix): Recognize d or D for double,
	return new value for default.
	(cpp_classify_number): Issue pedwarn for use of d or D in suffix.

gcc/testsuite/
	PR c/29027
	* gcc.dg/fltconst-1.c: Don't error for use of d or D in suffix.
	* gcc.dg/fltconst-2.c: New test.
	* gcc.dg/fltconst-double-pedantic-1.c: New test.
	* gcc.dg/fltconst-double-pedantic-2.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@145422 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 7 insertions, 0 deletions

diff --git a/gcc/c-lex.c b/gcc/c-lex.c
index 72a959052d2..9fe29df15fb 100644
--- a/gcc/c-lex.c
+++ b/gcc/c-lex.c
@@ -612,6 +612,13 @@ interpret_float (const cpp_token *token, unsigned int flags)
   char *copy;
   size_t copylen;
 
+  /* Default (no suffix) is double.  */
+  if (flags & CPP_N_DEFAULT)
+    {
+      flags ^= CPP_N_DEFAULT;
+      flags |= CPP_N_MEDIUM;
+    }
+
   /* Decode _Fract and _Accum.  */
   if (flags & CPP_N_FRACT || flags & CPP_N_ACCUM)
     return interpret_fixed (token, flags);