In c89 mode accept hex fp constants as an extension:
t2.c:1:17: warning: hexadecimal floating constants are a C99 feature
long double d = 0x0.0000003ffffffff00000p-16357L;
^
instead of emitting a weird error message that doesn't make sense:
t2.c:1:41: error: hexadecimal floating constants require an exponent
long double d = 0x0.0000003ffffffff00000p-16357L;
^
rdar://6096838
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@54035 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/LiteralSupport.cpp b/lib/Lex/LiteralSupport.cpp
index 6c91e0e..fc90b4b 100644
--- a/lib/Lex/LiteralSupport.cpp
+++ b/lib/Lex/LiteralSupport.cpp
@@ -354,18 +354,21 @@
}
// A binary exponent can appear with or with a '.'. If dotted, the
// binary exponent is required.
- if ((*s == 'p' || *s == 'P') && PP.getLangOptions().HexFloats) {
+ if (*s == 'p' || *s == 'P') {
const char *Exponent = s;
s++;
saw_exponent = true;
if (*s == '+' || *s == '-') s++; // sign
const char *first_non_digit = SkipDigits(s);
- if (first_non_digit != s) {
- s = first_non_digit;
- } else {
+ if (first_non_digit == s) {
Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin),
diag::err_exponent_has_no_digits);
+ return;
}
+ s = first_non_digit;
+
+ if (!PP.getLangOptions().HexFloats)
+ Diag(TokLoc, diag::ext_hexconstant_invalid);
} else if (saw_period) {
Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin),
diag::err_hexconstant_requires_exponent);