Support floating point literals of the form "1e-16f" which specify an exponent but no decimal point.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@44431 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Lex/LiteralSupport.cpp b/Lex/LiteralSupport.cpp
index f6d1a86..d00d9c3 100644
--- a/Lex/LiteralSupport.cpp
+++ b/Lex/LiteralSupport.cpp
@@ -261,7 +261,7 @@
s = SkipOctalDigits(s);
if (s == ThisTokEnd) {
// Done.
- } else if (isxdigit(*s)) {
+ } else if (isxdigit(*s) && !(*s == 'e' || *s == 'E')) {
TokLoc = PP.AdvanceToTokenCharacter(TokLoc, s-begin);
Diag(TokLoc, diag::err_invalid_octal_digit, std::string(s, s+1));
return;
@@ -290,7 +290,7 @@
s = SkipDigits(s);
if (s == ThisTokEnd) {
// Done.
- } else if (isxdigit(*s)) {
+ } else if (isxdigit(*s) && !(*s == 'e' || *s == 'E')) {
Diag(TokLoc, diag::err_invalid_decimal_digit, std::string(s, s+1));
return;
} else if (*s == '.') {
diff --git a/test/Lexer/11-27-2007-FloatLiterals.c b/test/Lexer/11-27-2007-FloatLiterals.c
new file mode 100644
index 0000000..68f67cf
--- /dev/null
+++ b/test/Lexer/11-27-2007-FloatLiterals.c
@@ -0,0 +1,7 @@
+// RUN: clang %s -emit-llvm 2>&1 | grep 0x3BFD83C940000000 | count 2
+// RUN: clang %s -emit-llvm 2>&1 | grep 0x46A3B8B5B5056E16 | count 2
+
+float F = 1e-19f;
+double D = 2e32;
+float F2 = 01e-19f;
+double D2 = 02e32;