It should not be supported in C++11, since that uses the C99 standard
library, in which 'a' is a format specifier.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147310
91177308-0d34-0410-b5e6-
96231b3b80d8
case 'L': lmKind = LengthModifier::AsLongDouble; ++I; break;
case 'q': lmKind = LengthModifier::AsLongLong; ++I; break;
case 'a':
- if (IsScanf && !LO.C99 && !LO.CPlusPlus) {
+ if (IsScanf && !LO.C99 && !LO.CPlusPlus0x) {
// For scanf in C90, look at the next character to see if this should
// be parsed as the GNU extension 'a' length modifier. If not, this
// will be parsed as a conversion specifier.
--- /dev/null
+// RUN: %clang_cc1 -fsyntax-only -verify -pedantic -std=c++11 %s
+
+extern "C" {
+extern int scanf(const char *restrict, ...);
+extern int printf(const char *restrict, ...);
+}
+
+void f(char **sp, float *fp) {
+ scanf("%as", sp); // expected-warning{{conversion specifies type 'float *' but the argument has type 'char **'}}
+
+ printf("%a", 1.0);
+ scanf("%afoobar", fp);
+}
--- /dev/null
+// RUN: %clang_cc1 -fsyntax-only -verify -pedantic %s
+
+extern "C" {
+extern int scanf(const char *restrict, ...);
+extern int printf(const char *restrict, ...);
+}
+
+void f(char **sp, float *fp) {
+ // TODO: Warn that the 'a' length modifier is an extension.
+ scanf("%as", sp);
+
+ // TODO: Warn that the 'a' conversion specifier is a C++11 feature.
+ printf("%a", 1.0);
+ scanf("%afoobar", fp);
+}