[cfe-commits] r39621 - in /cfe/cfe/trunk: Lex/LiteralSupport.cpp include/clang/Basic/DiagnosticKinds.def include/clang/Lex/LiteralSupport.h
clattner at cs.uiuc.edu
clattner at cs.uiuc.edu
Wed Jul 11 09:46:20 PDT 2007
Author: clattner
Date: Wed Jul 11 11:46:19 2007
New Revision: 39621
URL: http://llvm.org/viewvc/llvm-project?rev=39621&view=rev
Log:
Add support for binary literals:
http://gcc.gnu.org/onlinedocs/gcc/Binary-constants.html#Binary-constants
Modified:
cfe/cfe/trunk/Lex/LiteralSupport.cpp
cfe/cfe/trunk/include/clang/Basic/DiagnosticKinds.def
cfe/cfe/trunk/include/clang/Lex/LiteralSupport.h
Modified: cfe/cfe/trunk/Lex/LiteralSupport.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/cfe/trunk/Lex/LiteralSupport.cpp?rev=39621&r1=39620&r2=39621&view=diff
==============================================================================
--- cfe/cfe/trunk/Lex/LiteralSupport.cpp (original)
+++ cfe/cfe/trunk/Lex/LiteralSupport.cpp Wed Jul 11 11:46:19 2007
@@ -215,6 +215,7 @@
DigitsBegin = s;
s = SkipHexDigits(s);
if (s == ThisTokEnd) {
+ // Done.
} else if (*s == '.') {
s++;
saw_period = true;
@@ -237,6 +238,19 @@
Diag(TokLoc, diag::err_hexconstant_requires_exponent);
return;
}
+ } else if (*s == 'b' || *s == 'B') {
+ // 0b101010 is a GCC extension.
+ ++s;
+ radix = 2;
+ DigitsBegin = s;
+ s = SkipBinaryDigits(s);
+ if (s == ThisTokEnd) {
+ // Done.
+ } else if (isxdigit(*s)) {
+ Diag(TokLoc, diag::err_invalid_binary_digit, std::string(s, s+1));
+ return;
+ }
+ PP.Diag(TokLoc, diag::ext_binary_literal);
} else {
// For now, the radix is set to 8. If we discover that we have a
// floating point constant, the radix will change to 10. Octal floating
Modified: cfe/cfe/trunk/include/clang/Basic/DiagnosticKinds.def
URL: http://llvm.org/viewvc/llvm-project/cfe/cfe/trunk/include/clang/Basic/DiagnosticKinds.def?rev=39621&r1=39620&r2=39621&view=diff
==============================================================================
--- cfe/cfe/trunk/include/clang/Basic/DiagnosticKinds.def (original)
+++ cfe/cfe/trunk/include/clang/Basic/DiagnosticKinds.def Wed Jul 11 11:46:19 2007
@@ -530,6 +530,10 @@
"integer constant is so large that it is unsigned")
DIAG(err_exponent_has_no_digits, ERROR,
"exponent has no digits")
+DIAG(ext_binary_literal, EXTENSION,
+ "binary integer literals are an extension")
+DIAG(err_invalid_binary_digit, ERROR,
+ "invalid digit '%0' in binary constant")
DIAG(err_invalid_octal_digit, ERROR,
"invalid digit '%0' in octal constant")
DIAG(err_invalid_decimal_digit, ERROR,
Modified: cfe/cfe/trunk/include/clang/Lex/LiteralSupport.h
URL: http://llvm.org/viewvc/llvm-project/cfe/cfe/trunk/include/clang/Lex/LiteralSupport.h?rev=39621&r1=39620&r2=39621&view=diff
==============================================================================
--- cfe/cfe/trunk/include/clang/Lex/LiteralSupport.h (original)
+++ cfe/cfe/trunk/include/clang/Lex/LiteralSupport.h Wed Jul 11 11:46:19 2007
@@ -97,6 +97,15 @@
ptr++;
return ptr;
}
+
+ /// SkipBinaryDigits - Read and skip over any binary digits, up to End.
+ /// Return a pointer to the first non-binary digit or End.
+ const char *SkipBinaryDigits(const char *ptr) {
+ while (ptr != ThisTokEnd && (*ptr == '0' || *ptr == '1'))
+ ptr++;
+ return ptr;
+ }
+
};
/// CharLiteralParser - Perform interpretation and semantic analysis of a
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