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| author | Alexis Hunt <alercah@gmail.com> | 2010-01-10 23:37:56 +0000 |
|---|---|---|
| committer | Alexis Hunt <alercah@gmail.com> | 2010-01-10 23:37:56 +0000 |
| commit | 91b78382b51bb19e4023da4ef1818f146b7018dc (patch) | |
| tree | 57b662e6a2f64cecafd85c903a5e65f6ca471bd6 /clang/test/Lexer | |
| parent | 504a6ae83ee2a8d9ce7e6b470efc96822be3b2ed (diff) | |
| download | bcm5719-llvm-91b78382b51bb19e4023da4ef1818f146b7018dc.tar.gz bcm5719-llvm-91b78382b51bb19e4023da4ef1818f146b7018dc.zip | |
Do not parse hexadecimal floating point literals in C++0x mode because they are
incompatible with user-defined literals, specifically with the following form:
0x1p+1
The preprocessing-number token extends only as far as the 'p'; the '+' is not
included. Previously we could get away with this extension as p was an invalid
suffix, but now with user-defined literals, 'p' might well be a valid suffix
and we are forced to consider it as such.
This patch also adds a warning in non-0x C++ modes telling the user that
this extension is incompatible with C++0x that is enabled by default
(previously and with other languages, we warn only with a compliance
option such as -pedantic).
llvm-svn: 93135
Diffstat (limited to 'clang/test/Lexer')
| -rw-r--r-- | clang/test/Lexer/hexfloat.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/clang/test/Lexer/hexfloat.cpp b/clang/test/Lexer/hexfloat.cpp new file mode 100644 index 00000000000..5a62556ff61 --- /dev/null +++ b/clang/test/Lexer/hexfloat.cpp @@ -0,0 +1,8 @@ +//RUN: %clang_cc1 -fsyntax-only -verify +//RUN: %clang_cc1 -std=c++0x -fsyntax-only -verify + +#ifndef __GXX_EXPERIMENTAL_CXX0X__ +float f = 0x1p+1; // expected-warning {{incompatible with C++0x}} +#else +float f = 0x1p+1; // expected-warning {{invalid suffix}} +#endif |
