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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

llvm-svn: 54035
This commit is contained in:
Chris Lattner 2008-07-25 18:18:34 +00:00
parent 83ec24501e
commit c94ad4abcb
2 changed files with 9 additions and 4 deletions
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2
clang/include/clang/Basic/DiagnosticKinds.def
View File

@ -877,6 +877,8 @@ DIAG(err_invalid_decimal_digit, ERROR,
"invalid digit '%0' in decimal constant")
DIAG(err_hexconstant_requires_exponent, ERROR,
"hexadecimal floating constants require an exponent")
DIAG(ext_hexconstant_invalid, EXTENSION,
"hexadecimal floating constants are a C99 feature")
DIAG(err_typecheck_subscript_value, ERROR,
"subscripted value is neither array nor pointer")
DIAG(err_typecheck_subscript, ERROR,

11
clang/lib/Lex/LiteralSupport.cpp
View File

@ -354,18 +354,21 @@ void NumericLiteralParser::ParseNumberStartingWithZero(SourceLocation TokLoc) {
}
// 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);